Repository: xiaofeng-han/AndroidLibs Branch: master Commit: ff68f70df42a Files: 85 Total size: 173.7 KB Directory structure: gitextract_g6ebsdpr/ ├── .gitignore ├── .idea/ │ ├── .name │ ├── compiler.xml │ ├── copyright/ │ │ └── profiles_settings.xml │ ├── encodings.xml │ ├── gradle.xml │ ├── misc.xml │ ├── modules.xml │ ├── runConfigurations.xml │ └── vcs.xml ├── LICENSE ├── README.md ├── app/ │ ├── .gitignore │ ├── build.gradle │ ├── proguard-rules.pro │ └── src/ │ ├── androidTest/ │ │ └── java/ │ │ └── com/ │ │ └── xiaofeng/ │ │ └── androidlibs/ │ │ └── ApplicationTest.java │ ├── main/ │ │ ├── AndroidManifest.xml │ │ ├── assets/ │ │ │ └── instruction.md │ │ ├── java/ │ │ │ └── com/ │ │ │ └── xiaofeng/ │ │ │ └── androidlibs/ │ │ │ ├── DemoAdapter.java │ │ │ ├── DemoUtil.java │ │ │ ├── DemoViewHolder.java │ │ │ ├── GeneralPreferenceFragment.java │ │ │ ├── MainActivity.java │ │ │ ├── SettingsActivity.java │ │ │ └── util/ │ │ │ ├── ArrayUtil.java │ │ │ └── CollectionUtil.java │ │ └── res/ │ │ ├── drawable/ │ │ │ └── side_nav_bar.xml │ │ ├── drawable-v21/ │ │ │ ├── ic_menu_camera.xml │ │ │ ├── ic_menu_gallery.xml │ │ │ ├── ic_menu_manage.xml │ │ │ ├── ic_menu_send.xml │ │ │ ├── ic_menu_share.xml │ │ │ └── ic_menu_slideshow.xml │ │ ├── layout/ │ │ │ ├── activity_settings.xml │ │ │ ├── app_bar_main.xml │ │ │ ├── content_main.xml │ │ │ ├── listitem_tag.xml │ │ │ └── nav_header_main.xml │ │ ├── menu/ │ │ │ ├── main.xml │ │ │ └── settings.xml │ │ ├── values/ │ │ │ ├── colors.xml │ │ │ ├── dimens.xml │ │ │ ├── drawables.xml │ │ │ ├── pref_keys.xml │ │ │ ├── strings.xml │ │ │ └── styles.xml │ │ ├── values-v21/ │ │ │ └── styles.xml │ │ ├── values-w820dp/ │ │ │ └── dimens.xml │ │ └── xml/ │ │ └── pref_general.xml │ └── test/ │ └── java/ │ └── com/ │ └── xiaofeng/ │ └── androidlibs/ │ └── ExampleUnitTest.java ├── build.gradle ├── flowlayoutmanager/ │ ├── .gitignore │ ├── .idea/ │ │ ├── .name │ │ ├── compiler.xml │ │ ├── copyright/ │ │ │ └── profiles_settings.xml │ │ ├── encodings.xml │ │ ├── gradle.xml │ │ ├── misc.xml │ │ ├── modules.xml │ │ ├── runConfigurations.xml │ │ └── workspace.xml │ ├── README.md │ ├── build.gradle │ ├── gradle/ │ │ └── wrapper/ │ │ ├── gradle-wrapper.jar │ │ └── gradle-wrapper.properties │ ├── gradlew │ ├── gradlew.bat │ ├── proguard-rules.pro │ └── src/ │ ├── androidTest/ │ │ └── java/ │ │ └── com/ │ │ └── xiaofeng/ │ │ └── flowlayoutmanager/ │ │ ├── ApplicationTest.java │ │ └── CacheHelperTest.java │ └── main/ │ ├── AndroidManifest.xml │ ├── java/ │ │ └── com/ │ │ └── xiaofeng/ │ │ └── flowlayoutmanager/ │ │ ├── Alignment.java │ │ ├── FlowLayoutManager.java │ │ ├── FlowLayoutOptions.java │ │ ├── LayoutContext.java │ │ ├── LayoutHelper.java │ │ └── cache/ │ │ ├── CacheHelper.java │ │ └── Line.java │ └── res/ │ └── values/ │ └── strings.xml ├── gradle/ │ └── wrapper/ │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradle.properties ├── gradlew ├── gradlew.bat └── settings.gradle ================================================ FILE CONTENTS ================================================ ================================================ FILE: .gitignore ================================================ *.iml .gradle /local.properties /.idea/workspace.xml /.idea/libraries .DS_Store /captures # Built application files *.apk *.ap_ # Files for the Dalvik VM *.dex # Java class files *.class # Generated files bin/ gen/ # Gradle files .gradle/ build/ /*/build/ # Local configuration file (sdk path, etc) local.properties # Proguard folder generated by Eclipse proguard/ # Log Files *.log ================================================ FILE: .idea/.name ================================================ AndroidLibs ================================================ FILE: .idea/compiler.xml ================================================ ================================================ FILE: .idea/copyright/profiles_settings.xml ================================================ ================================================ FILE: .idea/encodings.xml ================================================ ================================================ FILE: .idea/gradle.xml ================================================ ================================================ FILE: .idea/misc.xml ================================================ ================================================ FILE: .idea/modules.xml ================================================ ================================================ FILE: .idea/runConfigurations.xml ================================================ ================================================ FILE: .idea/vcs.xml ================================================ ================================================ FILE: LICENSE ================================================ GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. 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If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. {one line to give the program's name and a brief idea of what it does.} Copyright (C) {year} {name of author} This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . Also add information on how to contact you by electronic and paper mail. If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode: {project} Copyright (C) {year} {fullname} This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an "about box". You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see . The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read . ================================================ FILE: README.md ================================================ FlowLayoutManager & Demo App === This is home page of FlowLayoutManager & It's Demo App. Please check [feature video](https://youtu.be/eyCb1gYT9mA) for features. Following is links to lib & demo app - [Flow LayoutManager](flowlayoutmanager) - [Demo Application](app) ================================================ FILE: app/.gitignore ================================================ /build ================================================ FILE: app/build.gradle ================================================ apply plugin: 'com.android.application' android { compileSdkVersion androidCompileSdkVersion buildToolsVersion androidBuildToolVersion defaultConfig { applicationId "com.xiaofeng.androidlibs" minSdkVersion androidMinSdkVersion targetSdkVersion androidTargetSdkVersion versionCode 1 versionName "1.0" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } dexOptions { incremental true } compileOptions { sourceCompatibility JavaVersion.VERSION_1_7 targetCompatibility JavaVersion.VERSION_1_7 } } dependencies { compile fileTree(include: ['*.jar'], dir: 'libs') testCompile 'junit:junit:4.12' compile(group: 'com.android.support', name: 'design', version: supportLibVersion) compile(group: 'com.android.support', name: 'appcompat-v7', version: supportLibVersion) compile(group: 'com.android.support', name: 'recyclerview-v7', version: supportLibVersion) compile(group: 'com.android.support', name: 'recyclerview-v7', version: supportLibVersion) compile 'com.xiaofeng.android:flowlayoutmanager:1.2.3.2' compile 'us.feras.mdv:markdownview:1.1.0' compile 'com.android.support:support-v4:23.3.0' } ================================================ FILE: app/proguard-rules.pro ================================================ # Add project specific ProGuard rules here. # By default, the flags in this file are appended to flags specified # in /home/xiaofeng/Android/Sdk/tools/proguard/proguard-android.txt # You can edit the include path and order by changing the proguardFiles # directive in build.gradle. # # For more details, see # http://developer.android.com/guide/developing/tools/proguard.html # Add any project specific keep options here: # If your project uses WebView with JS, uncomment the following # and specify the fully qualified class name to the JavaScript interface # class: #-keepclassmembers class fqcn.of.javascript.interface.for.webview { # public *; #} ================================================ FILE: app/src/androidTest/java/com/xiaofeng/androidlibs/ApplicationTest.java ================================================ package com.xiaofeng.androidlibs; import android.app.Application; import android.test.ApplicationTestCase; /** * Testing Fundamentals */ public class ApplicationTest extends ApplicationTestCase { public ApplicationTest() { super(Application.class); } } ================================================ FILE: app/src/main/AndroidManifest.xml ================================================ ================================================ FILE: app/src/main/assets/instruction.md ================================================ - Tap on item to remove - Long press on item to add an item in front of it ================================================ FILE: app/src/main/java/com/xiaofeng/androidlibs/DemoAdapter.java ================================================ package com.xiaofeng.androidlibs; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import java.util.LinkedList; import java.util.List; /** * Adapter for Demo item */ public class DemoAdapter extends RecyclerView.Adapter { List items; private int maxLinesPerItem; private boolean showMeta = false; public DemoAdapter() { this.items = new LinkedList<>(); maxLinesPerItem = 1; } public DemoAdapter(int maxLinesPerItem, List items) { this(); this.items.addAll(items); this.maxLinesPerItem = maxLinesPerItem; } @Override public DemoViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { return new DemoViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.listitem_tag, parent, false)).setShowMeta(showMeta); } @Override public void onBindViewHolder(final DemoViewHolder holder, final int position) { holder.setTagText(items.get(position)); holder.tagSize.setClickable(false); holder.tagText.setClickable(false); holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { int adapterPosition = holder.getAdapterPosition(); items.remove(adapterPosition); notifyItemRemoved(adapterPosition); } }); holder.itemView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { int adapterPosition = holder.getAdapterPosition(); List newItems = DemoUtil.generate(1, 3, 14, maxLinesPerItem, true); items.addAll(adapterPosition, newItems); notifyItemRangeInserted(adapterPosition, newItems.size()); return true; } }); } @Override public int getItemCount() { return items.size(); } public void newItems(int maxLinesPerItem, List newItems) { this.maxLinesPerItem = maxLinesPerItem; items.clear(); items.addAll(newItems); } public int getMaxLinesPerItem() { return maxLinesPerItem; } public void setShowMeta(boolean showMeta) { this.showMeta = showMeta; } } ================================================ FILE: app/src/main/java/com/xiaofeng/androidlibs/DemoUtil.java ================================================ package com.xiaofeng.androidlibs; import java.util.ArrayList; import java.util.List; import java.util.Random; /** * Utility for demo item generate */ public class DemoUtil { private static final Random random = new Random(); private static final String STRING_BASE = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; public static List generate(int total, int minLen, int maxLen, int maxLinesPerItem, boolean randomOrder) { ArrayList result = new ArrayList<>(total); StringBuilder sb = new StringBuilder(); for (int i = 0; i < total; i ++) { sb.setLength(0); int lineCount = random.nextInt(maxLinesPerItem) + 1; List lines = generate(lineCount, minLen, maxLen, randomOrder); boolean firstLine = true; for (String line : lines) { if (firstLine) { firstLine = false; } else { sb.append("\n"); } sb.append(line); } result.add(sb.toString()); } return result; } public static List generate(int total, int minLen, int maxLen, boolean randomOrder) { int baseLen = STRING_BASE.length(); ArrayList result = new ArrayList<>(total); int baseIndex, len; for (int i = 0; i < total; i ++) { int index = i; if (randomOrder) { index += random.nextInt(1000); } baseIndex = index % baseLen; len = random.nextInt(maxLen - minLen) + minLen; char baseChar = STRING_BASE.charAt(baseIndex); char[] chars = new char[len]; for (int j = 0; j < len; j ++) { chars[j] = baseChar; } result.add(new String(chars)); } return result; } } ================================================ FILE: app/src/main/java/com/xiaofeng/androidlibs/DemoViewHolder.java ================================================ package com.xiaofeng.androidlibs; import android.support.v7.widget.RecyclerView; import android.view.View; import android.widget.TextView; public class DemoViewHolder extends RecyclerView.ViewHolder { boolean showMeta = false; TextView tagText, tagSize; public DemoViewHolder(View itemView) { super(itemView); tagText = (TextView)itemView.findViewById(R.id.tag_text); tagSize = (TextView)itemView.findViewById(R.id.tag_count); } public void setTagText(String tag) { tagText.setText(tag); if (showMeta) { String[] lines = tag.split("\n"); StringBuilder sb = new StringBuilder(); sb.append("(").append(lines.length).append(":"); int length = 0; boolean first = true; for (String line : lines) { if (first) { first = false; } else { sb.append(","); } sb.append(line.length()); length += line.length(); } sb.append(":").append(length).append(")"); tagSize.setText(sb.toString()); } } public DemoViewHolder setShowMeta(boolean showMeta) { this.showMeta = showMeta; if (showMeta) { tagSize.setVisibility(View.VISIBLE); } else { tagSize.setVisibility(View.GONE); } return this; } } ================================================ FILE: app/src/main/java/com/xiaofeng/androidlibs/GeneralPreferenceFragment.java ================================================ package com.xiaofeng.androidlibs; import android.content.Context; import android.os.Bundle; import android.preference.EditTextPreference; import android.preference.ListPreference; import android.preference.Preference; import android.preference.PreferenceFragment; import android.preference.PreferenceManager; import com.xiaofeng.androidlibs.util.ArrayUtil; import java.util.HashMap; import java.util.Map; /** * This fragment shows general preferences only. It is used when the * activity is showing a two-pane settings UI. */ public class GeneralPreferenceFragment extends PreferenceFragment { public static class SummaryMapInfo { public final String summaryTemplate; public final String[] values; public final String[] entries; public SummaryMapInfo(String summaryTemplate, String[] values, String[] entries) { this.summaryTemplate = summaryTemplate; this.values = values; this.entries = entries; } } private final Map keySummaryInfoMap = new HashMap<>(); private Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() { @Override public boolean onPreferenceChange(Preference preference, Object value) { if (keySummaryInfoMap.containsKey(preference.getKey())) { SummaryMapInfo summaryMapInfo = keySummaryInfoMap.get(preference.getKey()); if (preference instanceof ListPreference) { int index = ArrayUtil.indexOf(summaryMapInfo.values, value.toString()); if (index != ArrayUtil.NOT_FOUND) { preference.setSummary(String.format(summaryMapInfo.summaryTemplate, summaryMapInfo.entries[index])); } } else if (preference instanceof EditTextPreference) { preference.setSummary(String.format(summaryMapInfo.summaryTemplate, value)); } } return true; } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.pref_general); } @Override public void onAttach(Context context) { super.onAttach(context); keySummaryInfoMap.put(getString(R.string.pref_key_max_items_per_line), new SummaryMapInfo(getString(R.string.pref_max_items_per_line_summary_template), getResources().getStringArray(R.array.pref_max_items_per_line_values), getResources().getStringArray(R.array.pref_max_items_per_line_entries))); keySummaryInfoMap.put(getString(R.string.pref_key_alignment), new SummaryMapInfo(getString(R.string.pref_alignment_summary_template), getResources().getStringArray(R.array.pref_alignment_values), getResources().getStringArray(R.array.pref_alignment_entries))); keySummaryInfoMap.put(getString(R.string.pref_key_max_lines_per_item), new SummaryMapInfo(getString(R.string.pref_max_lines_per_item_summary_template), null, null)); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); bindPreferenceSummaryToValue(findPreference(getString(R.string.pref_key_alignment))); bindPreferenceSummaryToValue(findPreference(getString(R.string.pref_key_max_items_per_line))); bindPreferenceSummaryToValue(findPreference(getString(R.string.pref_key_max_lines_per_item))); } /** * Binds a preference's summary to its value. More specifically, when the * preference's value is changed, its summary (line of text below the * preference title) is updated to reflect the value. The summary is also * immediately updated upon calling this method. The exact display format is * dependent on the type of preference. * * @see #sBindPreferenceSummaryToValueListener */ private void bindPreferenceSummaryToValue(Preference preference) { // Set the listener to watch for value changes. preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener); // Trigger the listener immediately with the preference's // current value. sBindPreferenceSummaryToValueListener.onPreferenceChange(preference, PreferenceManager .getDefaultSharedPreferences(preference.getContext()) .getString(preference.getKey(), "")); } } ================================================ FILE: app/src/main/java/com/xiaofeng/androidlibs/MainActivity.java ================================================ package com.xiaofeng.androidlibs; import android.content.Intent; import android.content.SharedPreferences; import android.graphics.Rect; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import com.xiaofeng.flowlayoutmanager.Alignment; import com.xiaofeng.flowlayoutmanager.FlowLayoutManager; import us.feras.mdv.MarkdownView; public class MainActivity extends AppCompatActivity { RecyclerView recyclerView; FlowLayoutManager flowLayoutManager; MarkdownView markdownView; private static final int REQ_CODE_SETTINGS = 101; private boolean settingChanged = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.app_bar_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); init(); } private void init() { recyclerView = (RecyclerView) findViewById(R.id.list); flowLayoutManager = new FlowLayoutManager().singleItemPerLine(); flowLayoutManager.setAutoMeasureEnabled(true); recyclerView.setLayoutManager(flowLayoutManager); recyclerView.setAdapter(new DemoAdapter(1, DemoUtil.generate(2000, 3, 13, 1, false))); recyclerView.addItemDecoration(new RecyclerView.ItemDecoration() { @Override public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) { super.getItemOffsets(outRect, view, parent, state); outRect.set(5, 5, 5, 5); } }); markdownView = (MarkdownView)findViewById(R.id.instruction_mdown); markdownView.loadMarkdownFile("file:///android_asset/instruction.md"); loadSettingsFromSharedPref(); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == R.id.action_settings) { startActivityForResult(new Intent(this, SettingsActivity.class), REQ_CODE_SETTINGS); return true; } return super.onOptionsItemSelected(item); } private void loadSettingsFromSharedPref() { SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); String itemsPerLineString = sharedPreferences.getString(getResources().getString(R.string.pref_key_max_items_per_line), getString(R.string.pref_max_items_per_line_default)); int itemsPerLine = Integer.valueOf(itemsPerLineString); String alignmentString = sharedPreferences.getString(getResources().getString(R.string.pref_key_alignment), getString(R.string.pref_alignment_default)); int alignmentInt = Integer.valueOf(alignmentString); Alignment[] alignments = Alignment.values(); Alignment selectedAlignment = Alignment.LEFT; for (Alignment alignment : alignments) { if (alignment.ordinal() == alignmentInt) { selectedAlignment = alignment; break; } } // boolean showMeta = sharedPreferences.getBoolean(getString(R.string.pref_key_show_meta), false); flowLayoutManager.maxItemsPerLine(itemsPerLine); flowLayoutManager.setAlignment(selectedAlignment); DemoAdapter demoAdapter = (DemoAdapter)recyclerView.getAdapter(); // demoAdapter.setShowMeta(showMeta); String maxLinesPerItemString = sharedPreferences.getString(getString(R.string.pref_key_max_lines_per_item), getString(R.string.pref_max_lines_per_item_default)); int maxLinesPerItem = Integer.valueOf(maxLinesPerItemString); demoAdapter.newItems(maxLinesPerItem, DemoUtil.generate(demoAdapter.getItemCount(), 3, 13, maxLinesPerItem, false)); recyclerView.getAdapter().notifyItemRangeChanged(0, recyclerView.getAdapter().getItemCount()); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQ_CODE_SETTINGS) { settingChanged = true; } } @Override public void onWindowFocusChanged(boolean hasFocus) { super.onWindowFocusChanged(hasFocus); if (hasFocus) { if (settingChanged) { settingChanged = false; recyclerView.post(new Runnable() { @Override public void run() { loadSettingsFromSharedPref(); } }); } } } } ================================================ FILE: app/src/main/java/com/xiaofeng/androidlibs/SettingsActivity.java ================================================ package com.xiaofeng.androidlibs; import android.app.Activity; import android.content.SharedPreferences; import android.os.Bundle; import android.preference.PreferenceActivity; import android.preference.PreferenceManager; import android.support.v7.app.ActionBar; import android.support.v7.app.AppCompatActivity; import android.view.Menu; import android.view.MenuItem; /** * A {@link PreferenceActivity} that presents a set of application settings. On * handset devices, settings are presented as a single list. On tablets, * settings are split by category, with category headers shown to the left of * the list of settings. *

* See * Android Design: Settings for design guidelines and the Settings * API Guide for more information on developing a Settings UI. */ public class SettingsActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setupActionBar(); setContentView(R.layout.activity_settings); PreferenceManager.getDefaultSharedPreferences(this).registerOnSharedPreferenceChangeListener(new SharedPreferences.OnSharedPreferenceChangeListener() { @Override public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) { } }); getFragmentManager().beginTransaction().add(R.id.fragment_container, new GeneralPreferenceFragment(), "General Settings").commit(); } /** * Set up the {@link android.app.ActionBar}, if the API is available. */ private void setupActionBar() { ActionBar actionBar = getSupportActionBar(); if (actionBar != null) { // Show the Up button in the action bar. actionBar.setDisplayHomeAsUpEnabled(true); } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.settings, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == R.id.done) { setResult(Activity.RESULT_OK); finish(); } return super.onOptionsItemSelected(item); } } ================================================ FILE: app/src/main/java/com/xiaofeng/androidlibs/util/ArrayUtil.java ================================================ package com.xiaofeng.androidlibs.util; /** * Created by xhan on 5/14/16. */ public class ArrayUtil { public static final int NOT_FOUND = -1; public static int indexOf(T[] arr, T searchKey) { if (CollectionUtil.isEmpty(arr)) { return NOT_FOUND; } int index = 0; for (T arrItem : arr) { if (arrItem.compareTo(searchKey) == 0) { return index; } index ++; } return NOT_FOUND; } } ================================================ FILE: app/src/main/java/com/xiaofeng/androidlibs/util/CollectionUtil.java ================================================ package com.xiaofeng.androidlibs.util; /** * Created by xhan on 5/14/16. */ public class CollectionUtil { public static boolean isEmpty(T[] arr) { if (arr == null || arr.length == 0) { return true; } return false; } } ================================================ FILE: app/src/main/res/drawable/side_nav_bar.xml ================================================ ================================================ FILE: app/src/main/res/drawable-v21/ic_menu_camera.xml ================================================ ================================================ FILE: app/src/main/res/drawable-v21/ic_menu_gallery.xml ================================================ ================================================ FILE: app/src/main/res/drawable-v21/ic_menu_manage.xml ================================================ ================================================ FILE: app/src/main/res/drawable-v21/ic_menu_send.xml ================================================ ================================================ FILE: app/src/main/res/drawable-v21/ic_menu_share.xml ================================================ ================================================ FILE: app/src/main/res/drawable-v21/ic_menu_slideshow.xml ================================================ ================================================ FILE: app/src/main/res/layout/activity_settings.xml ================================================ ================================================ FILE: app/src/main/res/layout/app_bar_main.xml ================================================ ================================================ FILE: app/src/main/res/layout/content_main.xml ================================================ ================================================ FILE: app/src/main/res/layout/listitem_tag.xml ================================================ ================================================ FILE: app/src/main/res/layout/nav_header_main.xml ================================================ ================================================ FILE: app/src/main/res/menu/main.xml ================================================

================================================ FILE: app/src/main/res/menu/settings.xml ================================================ ================================================ FILE: app/src/main/res/values/colors.xml ================================================ #3F51B5 #303F9F #FF4081 #ffff99 ================================================ FILE: app/src/main/res/values/dimens.xml ================================================ 16dp 160dp 16dp 16dp 16dp ================================================ FILE: app/src/main/res/values/drawables.xml ================================================ @android:drawable/ic_menu_camera @android:drawable/ic_menu_gallery @android:drawable/ic_menu_slideshow @android:drawable/ic_menu_manage @android:drawable/ic_menu_share @android:drawable/ic_menu_send ================================================ FILE: app/src/main/res/values/pref_keys.xml ================================================ pref_key_align pref_key_max_items_per_line pref_key_max_lines_per_item pref_key_show_meta ================================================ FILE: app/src/main/res/values/strings.xml ================================================ AndroidLibs Settings Items per lines Alignment Settings General Alignment Align to left Align to right Items per line Max item number per line: %1$s 1 item 2 items No limit 0 1 2 @string/pref_max_items_per_line_default Align to left Align to right 0 @string/pref_alignment_default 1 Current alignment: %1$s Max items per line 1 Max lines per item: %1$s Show metadata for each item Show metadata Hide metadata false ================================================ FILE: app/src/main/res/values/styles.xml ================================================ ================================================ FILE: app/src/main/res/values-w820dp/dimens.xml ================================================ 64dp ================================================ FILE: app/src/main/res/xml/pref_general.xml ================================================ ================================================ FILE: app/src/test/java/com/xiaofeng/androidlibs/ExampleUnitTest.java ================================================ package com.xiaofeng.androidlibs; import org.junit.Test; import static org.junit.Assert.*; /** * To work on unit tests, switch the Test Artifact in the Build Variants view. */ public class ExampleUnitTest { @Test public void addition_isCorrect() throws Exception { assertEquals(4, 2 + 2); } } ================================================ FILE: build.gradle ================================================ // Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:2.1.0' classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.4' classpath 'com.github.dcendents:android-maven-gradle-plugin:1.3' classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.6' classpath 'com.github.dcendents:android-maven-gradle-plugin:1.3' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } allprojects { repositories { jcenter() } } subprojects { ext.supportLibVersion = "23.3.0" ext.playServiceVersion = "8.4.0" ext.androidBuildToolVersion = "23.0.3"; ext.androidCompileSdkVersion = 23 ext.androidMinSdkVersion = 16 ext.androidTargetSdkVersion = 23 } task clean(type: Delete) { delete rootProject.buildDir } ================================================ FILE: flowlayoutmanager/.gitignore ================================================ /build ================================================ FILE: flowlayoutmanager/.idea/.name ================================================ flowlayoutmanager ================================================ FILE: flowlayoutmanager/.idea/compiler.xml ================================================ ================================================ FILE: flowlayoutmanager/.idea/copyright/profiles_settings.xml ================================================ ================================================ FILE: flowlayoutmanager/.idea/encodings.xml ================================================ ================================================ FILE: flowlayoutmanager/.idea/gradle.xml ================================================ ================================================ FILE: flowlayoutmanager/.idea/misc.xml ================================================ ================================================ FILE: flowlayoutmanager/.idea/modules.xml ================================================ ================================================ FILE: flowlayoutmanager/.idea/runConfigurations.xml ================================================ ================================================ FILE: flowlayoutmanager/.idea/workspace.xml ================================================ 1451515463827 ================================================ FILE: flowlayoutmanager/README.md ================================================ FlowLayoutManager Readme === [![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-FlowLayoutManager-green.svg?style=true)](https://android-arsenal.com/details/1/3733) Overview === FlowLayoutManager is a layoutManager that works with Android ___RecyclerView___ Widget, to layout views in flow style, with support of ___predictive animations___, item per line limit, auto measurement & alignments (left or right) [Google Play Link for Demo App](https://play.google.com/store/apps/details?id=com.xiaofeng.androidlibs) [Youtube Demo Video](https://youtu.be/eyCb1gYT9mA) ![Feature GIF](https://cloud.githubusercontent.com/assets/15362031/15170689/fe3117d6-16fc-11e6-8ffc-3e90b9bf5430.gif) How to use === setup --- Add following to your build.gradle dependencies section ```gradle compile 'com.xiaofeng.android:flowlayoutmanager:1.2.3.2' ``` Basic layout --- ```java recyclerView.setLayoutManager(new FlowLayoutManager()); ``` Predictive animation --- No setup needed, when data changed, do not use notifyDatasetChanged, which will skip all animations, but use notifyItemXXX APIs, those APIs will trigger animations. Item per line limitation --- Single item per line ```java recyclerView.setLayoutManager(new FlowLayoutManager().singleItemPerLine()); ``` or x items per line ```java recyclerView.setLayoutManager(new FlowLayoutManager().maxItemsPerLine(x)); ``` to remove Item per line limitation ```java ((FlowLayoutManager)recyclerView.getLayoutManager()).removeItemPerLineLimit(); ``` Auto measurement --- ```java FlowLayoutManager flowLayoutManager = new FlowLayoutManager(); flowLayoutManager.setAutoMeasureEnabled(true); recyclerView.setLayoutManager(flowLayoutManager); ``` Alignment --- ```java recyclerView.setLayoutManager(new FlowLayoutManager().setAlignment(Alignment.LEFT)); ``` Alignment could be LEFT or RIGHT. License ======= Copyright 2016 Xiaofeng Han Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ================================================ FILE: flowlayoutmanager/build.gradle ================================================ // to publish run ./gradlew clean bintrayUpload apply plugin: 'com.android.library' apply plugin: 'com.github.dcendents.android-maven' apply plugin: 'com.jfrog.bintray' project.ext { libVersion = '1.2.3.2' libVersionCode = 7 libGroupId = 'com.xiaofeng.android' libArtifactId = 'flowlayoutmanager' gitUrl = 'git@github.com:xiaofeng-han/AndroidLibs.git' siteUrl = 'https://github.com/xiaofeng-han/AndroidLibs' } group = 'com.xiaofeng.android' version = libVersion android { compileSdkVersion androidCompileSdkVersion buildToolsVersion androidBuildToolVersion resourcePrefix "xiaofeng__" defaultConfig { minSdkVersion androidMinSdkVersion targetSdkVersion androidTargetSdkVersion versionCode libVersionCode versionName libVersion testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } testOptions { unitTests.returnDefaultValues = false; } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } dexOptions { incremental true } compileOptions { sourceCompatibility JavaVersion.VERSION_1_7 targetCompatibility JavaVersion.VERSION_1_7 } } dependencies { compile fileTree(include: ['*.jar'], dir: 'libs') androidTestCompile 'junit:junit:4.12' compile(group: 'com.android.support', name: 'appcompat-v7', version: supportLibVersion) compile(group: 'com.android.support', name: 'recyclerview-v7', version: supportLibVersion) androidTestCompile 'com.android.support:support-annotations:23.3.0' androidTestCompile 'com.android.support.test:runner:0.5' } Properties properties = new Properties() properties.load(project.rootProject.file('local.properties').newDataInputStream()) install { repositories.mavenInstaller { // This generates POM.xml with proper parameters pom { project { packaging 'aar' // Add your description here name 'FlowLayoutManager for android RecyclerView' url siteUrl // Set your license licenses { license { name 'GPL-v3.0' url 'http://www.gnu.org/licenses/gpl-3.0.en.html' } } developers { developer { id 'xiaofeng-han' name 'Xiaofeng Han' email 'hhhanxf@gmail.com' } } scm { connection gitUrl developerConnection gitUrl url gitUrl } } } } } task sourcesJar(type: Jar) { from android.sourceSets.main.java.srcDirs classifier = 'sources' } task javadoc(type: Javadoc) { source = android.sourceSets.main.java.srcDirs classpath += project.files(android.getBootClasspath().join(File.pathSeparator)) } task javadocJar(type: Jar, dependsOn: javadoc) { classifier = 'javadoc' from javadoc.destinationDir } artifacts { archives sourcesJar archives javadocJar } bintray { user = properties.getProperty('bintray.user') key = properties.getProperty('bintray.apikey') configurations = ['archives'] pkg { repo = 'maven' name = 'FlowLayoutManager' userOrg = 'hhhanxf' licenses = ['GPL-3.0'] vcsUrl = gitUrl githubRepo = 'xiaofeng-han/AndroidLibs' githubReleaseNotesFile = 'README.md' publish = true version { name = libVersion desc = 'FLowLayoutManager' released = new Date() vcsTag = libVersion gpg { sign = true passphrase = properties.getProperty('bintray.gpg.password') } } } } task wrapper(type: Wrapper) { gradleVersion = '2.10' } ================================================ FILE: flowlayoutmanager/gradle/wrapper/gradle-wrapper.properties ================================================ #Wed Oct 21 11:34:03 PDT 2015 distributionBase=GRADLE_USER_HOME distributionPath=wrapper/dists zipStoreBase=GRADLE_USER_HOME zipStorePath=wrapper/dists distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip ================================================ FILE: flowlayoutmanager/gradlew ================================================ #!/usr/bin/env bash ############################################################################## ## ## Gradle start up script for UN*X ## ############################################################################## # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. DEFAULT_JVM_OPTS="" APP_NAME="Gradle" APP_BASE_NAME=`basename "$0"` # Use the maximum available, or set MAX_FD != -1 to use that value. MAX_FD="maximum" warn ( ) { echo "$*" } die ( ) { echo echo "$*" echo exit 1 } # OS specific support (must be 'true' or 'false'). cygwin=false msys=false darwin=false case "`uname`" in CYGWIN* ) cygwin=true ;; Darwin* ) darwin=true ;; MINGW* ) msys=true ;; esac # Attempt to set APP_HOME # Resolve links: $0 may be a link PRG="$0" # Need this for relative symlinks. while [ -h "$PRG" ] ; do ls=`ls -ld "$PRG"` link=`expr "$ls" : '.*-> \(.*\)$'` if expr "$link" : '/.*' > /dev/null; then PRG="$link" else PRG=`dirname "$PRG"`"/$link" fi done SAVED="`pwd`" cd "`dirname \"$PRG\"`/" >/dev/null APP_HOME="`pwd -P`" cd "$SAVED" >/dev/null CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar # Determine the Java command to use to start the JVM. if [ -n "$JAVA_HOME" ] ; then if [ -x "$JAVA_HOME/jre/sh/java" ] ; then # IBM's JDK on AIX uses strange locations for the executables JAVACMD="$JAVA_HOME/jre/sh/java" else JAVACMD="$JAVA_HOME/bin/java" fi if [ ! -x "$JAVACMD" ] ; then die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME Please set the JAVA_HOME variable in your environment to match the location of your Java installation." fi else JAVACMD="java" which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. Please set the JAVA_HOME variable in your environment to match the location of your Java installation." fi # Increase the maximum file descriptors if we can. if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then MAX_FD_LIMIT=`ulimit -H -n` if [ $? -eq 0 ] ; then if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then MAX_FD="$MAX_FD_LIMIT" fi ulimit -n $MAX_FD if [ $? -ne 0 ] ; then warn "Could not set maximum file descriptor limit: $MAX_FD" fi else warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" fi fi # For Darwin, add options to specify how the application appears in the dock if $darwin; then GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" fi # For Cygwin, switch paths to Windows format before running java if $cygwin ; then APP_HOME=`cygpath --path --mixed "$APP_HOME"` CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` JAVACMD=`cygpath --unix "$JAVACMD"` # We build the pattern for arguments to be converted via cygpath ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` SEP="" for dir in $ROOTDIRSRAW ; do ROOTDIRS="$ROOTDIRS$SEP$dir" SEP="|" done OURCYGPATTERN="(^($ROOTDIRS))" # Add a user-defined pattern to the cygpath arguments if [ "$GRADLE_CYGPATTERN" != "" ] ; then OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" fi # Now convert the arguments - kludge to limit ourselves to /bin/sh i=0 for arg in "$@" ; do CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` else eval `echo args$i`="\"$arg\"" fi i=$((i+1)) done case $i in (0) set -- ;; (1) set -- "$args0" ;; (2) set -- "$args0" "$args1" ;; (3) set -- "$args0" "$args1" "$args2" ;; (4) set -- "$args0" "$args1" "$args2" "$args3" ;; (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; esac fi # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules function splitJvmOpts() { JVM_OPTS=("$@") } eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME" exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@" ================================================ FILE: flowlayoutmanager/gradlew.bat ================================================ @if "%DEBUG%" == "" @echo off @rem ########################################################################## @rem @rem Gradle startup script for Windows @rem @rem ########################################################################## @rem Set local scope for the variables with windows NT shell if "%OS%"=="Windows_NT" setlocal @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. set DEFAULT_JVM_OPTS= set DIRNAME=%~dp0 if "%DIRNAME%" == "" set DIRNAME=. set APP_BASE_NAME=%~n0 set APP_HOME=%DIRNAME% @rem Find java.exe if defined JAVA_HOME goto findJavaFromJavaHome set JAVA_EXE=java.exe %JAVA_EXE% -version >NUL 2>&1 if "%ERRORLEVEL%" == "0" goto init echo. echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. echo. echo Please set the JAVA_HOME variable in your environment to match the echo location of your Java installation. goto fail :findJavaFromJavaHome set JAVA_HOME=%JAVA_HOME:"=% set JAVA_EXE=%JAVA_HOME%/bin/java.exe if exist "%JAVA_EXE%" goto init echo. echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% echo. echo Please set the JAVA_HOME variable in your environment to match the echo location of your Java installation. goto fail :init @rem Get command-line arguments, handling Windowz variants if not "%OS%" == "Windows_NT" goto win9xME_args if "%@eval[2+2]" == "4" goto 4NT_args :win9xME_args @rem Slurp the command line arguments. set CMD_LINE_ARGS= set _SKIP=2 :win9xME_args_slurp if "x%~1" == "x" goto execute set CMD_LINE_ARGS=%* goto execute :4NT_args @rem Get arguments from the 4NT Shell from JP Software set CMD_LINE_ARGS=%$ :execute @rem Setup the command line set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar @rem Execute Gradle "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% :end @rem End local scope for the variables with windows NT shell if "%ERRORLEVEL%"=="0" goto mainEnd :fail rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of rem the _cmd.exe /c_ return code! if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 exit /b 1 :mainEnd if "%OS%"=="Windows_NT" endlocal :omega ================================================ FILE: flowlayoutmanager/proguard-rules.pro ================================================ # Add project specific ProGuard rules here. # By default, the flags in this file are appended to flags specified # in /home/xiaofeng/Android/Sdk/tools/proguard/proguard-android.txt # You can edit the include path and order by changing the proguardFiles # directive in build.gradle. # # For more details, see # http://developer.android.com/guide/developing/tools/proguard.html # Add any project specific keep options here: # If your project uses WebView with JS, uncomment the following # and specify the fully qualified class name to the JavaScript interface # class: #-keepclassmembers class fqcn.of.javascript.interface.for.webview { # public *; #} ================================================ FILE: flowlayoutmanager/src/androidTest/java/com/xiaofeng/flowlayoutmanager/ApplicationTest.java ================================================ package com.xiaofeng.flowlayoutmanager; import android.app.Application; import android.test.ApplicationTestCase; /** * Testing Fundamentals */ public class ApplicationTest extends ApplicationTestCase { public ApplicationTest() { super(Application.class); } } ================================================ FILE: flowlayoutmanager/src/androidTest/java/com/xiaofeng/flowlayoutmanager/CacheHelperTest.java ================================================ package com.xiaofeng.flowlayoutmanager; import android.graphics.Point; import android.test.InstrumentationTestCase; import com.xiaofeng.flowlayoutmanager.cache.CacheHelper; import org.junit.Test; import static org.hamcrest.CoreMatchers.is; import static org.hamcrest.MatcherAssert.assertThat; /** * Created by xhan on 4/27/16. */ public class CacheHelperTest extends InstrumentationTestCase { @Test public void testLineCountsNoLimit() throws Exception { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1), new Point(2, 1) , new Point(9, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); int[] lineCounts = cacheHelper.getLineMap(); assertThat("lineCounts should have 4 items", lineCounts.length, is(4)); assertThat("line 0 have 2 items", lineCounts[0], is(2)); assertThat("line 1 have 3 items", lineCounts[1], is(3)); assertThat("line 2 have 1 items", lineCounts[2], is(1)); assertThat("line 3 have 2 items", lineCounts[3], is(2)); } @Test public void testLineCountsWithLimit() throws Exception { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = 2; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1) , new Point(2, 1) , new Point(9, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); int[] lineCounts = cacheHelper.getLineMap(); assertThat("lineCounts should have 5 items", lineCounts.length, is(5)); assertThat("line 0 have 2 items", lineCounts[0], is(2)); assertThat("line 1 have 2 items", lineCounts[1], is(2)); assertThat("line 2 have 1 items", lineCounts[2], is(1)); assertThat("line 3 have 1 items", lineCounts[3], is(1)); assertThat("line 4 have 2 items", lineCounts[4], is(2)); } public void testItemLineIndex() { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = 2; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1) , new Point(2, 1) , new Point(9, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); assertThat("1st item have line index 0", cacheHelper.itemLineIndex(0), is(0)); assertThat("3rd item have line index 1", cacheHelper.itemLineIndex(2), is(1)); assertThat("7th item have line index 4", cacheHelper.itemLineIndex(6), is(4)); assertThat("8th item have line index 4", cacheHelper.itemLineIndex(7), is(4)); assertThat("9th item have line index -1", cacheHelper.itemLineIndex(8), is(CacheHelper.NOT_FOUND)); } public void testHavePreviousLineCached() { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = 2; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1) , new Point(2, 1) , new Point(9, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); assertThat("1st item do not have previous line cached", cacheHelper.hasPreviousLineCached(0), is(false)); assertThat("3rd item have previous line cached", cacheHelper.hasPreviousLineCached(2), is(true)); assertThat("8th item have previous line cached", cacheHelper.hasPreviousLineCached(7), is(true)); assertThat("9th item do not have previous line cached", cacheHelper.hasPreviousLineCached(9), is(false)); } public void testHaveNextLineCached() { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = 2; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1) , new Point(2, 1) , new Point(9, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); assertThat("1st item have next line cached", cacheHelper.hasNextLineCached(0), is(true)); assertThat("3rd item have next line cached", cacheHelper.hasNextLineCached(2), is(true)); assertThat("8th item does not have next line cached", cacheHelper.hasNextLineCached(7), is(false)); assertThat("9th item do not have next line cached", cacheHelper.hasNextLineCached(9), is(false)); } public void testRemoveMiddle() { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = 2; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1) , new Point(2, 1) , new Point(9, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); cacheHelper.remove(3, 1); // second 4 in second line // after remove it should be // 5, 2 // 4, 2 // 9 // 2, 3 int[] lineCounts = cacheHelper.getLineMap(); assertThat("line counts should have 4 lines", lineCounts.length, is(4)); assertThat("line 1 have 2 items", lineCounts[0], is(2)); assertThat("line 2 have 2 items", lineCounts[1], is(2)); assertThat("line 3 have 1 items", lineCounts[2], is(1)); assertThat("line 4 have 1 items", lineCounts[3], is(2)); cacheHelper.remove(4, 1); // 9 is removed // after removal it should be // 5, 2 // 4, 2 // 2, 3 lineCounts = cacheHelper.getLineMap(); assertThat("line counts should have 3 lines", lineCounts.length, is(3)); assertThat("line 1 have 2 items", lineCounts[0], is(2)); assertThat("line 2 have 3 items", lineCounts[1], is(2)); assertThat("line 3 have 1 items", lineCounts[2], is(2)); } public void testAdd() throws Exception { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1), new Point(2, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); cacheHelper.add(3, new Point(9, 2), new Point(1,1), new Point(2, 2)); // after addition it should be: // 5, 2 // 4 // 9, 1 // 2, 4, 2, 2 // 3 int[] lineCounts = cacheHelper.getLineMap(); assertThat("should have 5 lines", lineCounts.length, is(5)); assertThat("line 1 have 2 items", lineCounts[0], is(2)); assertThat("line 2 have 1 items", lineCounts[1], is(1)); assertThat("line 3 have 2 items", lineCounts[2], is(2)); assertThat("line 4 have 4 items", lineCounts[3], is(4)); assertThat("line 5 have 1 items", lineCounts[4], is(1)); } public void testRemoveMultiple() throws Exception { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1), new Point(2, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); cacheHelper.remove(3, 2); // after Remove it should be: // 5, 2 // 4, 2, 3 int[] lineCounts = cacheHelper.getLineMap(); assertThat("should have 2 lines", lineCounts.length, is(2)); assertThat("line 1 have 2 items", lineCounts[0], is(2)); assertThat("line 2 have 3 items", lineCounts[1], is(3)); } public void testInvalidateSize() throws Exception { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1), new Point(2, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); cacheHelper.invalidSizes(4, 2); // after invalidate it should be: // 5, 2 // 4, 4 int[] lineCounts = cacheHelper.getLineMap(); assertThat("should have 2 lines", lineCounts.length, is(2)); assertThat("line 1 have 2 items", lineCounts[0], is(2)); assertThat("line 2 have 2 items", lineCounts[1], is(2)); } public void testOnItemInserted() throws Exception { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1), new Point(2, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); cacheHelper.add(3, 2); // after onItemInserted // 5, 2 // 4 int[] lineCounts = cacheHelper.getLineMap(); assertThat("line counts have 2 items", lineCounts.length, is(2)); assertThat("line 1 have 2 items", lineCounts[0], is(2)); assertThat("line 2 have 1 items", lineCounts[1], is(1)); } public void testRemoveBeyondEnd() throws Exception { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1), new Point(2, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); cacheHelper.remove(5, 10); // should be // 5, 2, // 4, 4, 2 int[] lineCounts = cacheHelper.getLineMap(); assertThat("line counts have 2 items", lineCounts.length, is(2)); assertThat("line 1 have 2 items", lineCounts[0], is(2)); assertThat("line 2 have 3 items", lineCounts[1], is(3)); } public void testMoveForward() throws Exception { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1), new Point(2, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); cacheHelper.move(5, 1, 2); // after move // 5, 2, 3 // 2, 4, 4 // 2 int[] lineCounts = cacheHelper.getLineMap(); assertThat("line counts have 3 items", lineCounts.length, is(3)); assertThat("line 1 have 3 items", lineCounts[0], is(3)); assertThat("line 2 have 3 items", lineCounts[1], is(3)); assertThat("line 3 have 1 items", lineCounts[2], is(1)); } public void testMoveBackward() throws Exception { FlowLayoutOptions layoutOptions = new FlowLayoutOptions(); layoutOptions.itemsPerLine = FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT; int contentAreaWidth = 10; CacheHelper cacheHelper = new CacheHelper(layoutOptions.itemsPerLine, contentAreaWidth); Point[] items = new Point[] { new Point(5, 1), new Point(2, 1) , new Point(4, 1), new Point(4, 1), new Point(2, 1) , new Point(2, 1), new Point(3, 2)}; cacheHelper.add(0, items); cacheHelper.move(3, 6, 2); // after move // 5, 2 // 4, 2, 4 // 2, 3 int[] lineCounts = cacheHelper.getLineMap(); assertThat("line counts have 3 items", lineCounts.length, is(3)); assertThat("line 1 have 3 items", lineCounts[0], is(2)); assertThat("line 2 have 3 items", lineCounts[1], is(3)); assertThat("line 3 have 1 items", lineCounts[2], is(2)); } } ================================================ FILE: flowlayoutmanager/src/main/AndroidManifest.xml ================================================ ================================================ FILE: flowlayoutmanager/src/main/java/com/xiaofeng/flowlayoutmanager/Alignment.java ================================================ package com.xiaofeng.flowlayoutmanager; /** * Created by xhan on 4/11/16. */ public enum Alignment { LEFT, RIGHT } ================================================ FILE: flowlayoutmanager/src/main/java/com/xiaofeng/flowlayoutmanager/FlowLayoutManager.java ================================================ package com.xiaofeng.flowlayoutmanager; import android.graphics.Point; import android.graphics.PointF; import android.graphics.Rect; import android.support.annotation.Nullable; import android.support.v7.widget.LinearSmoothScroller; import android.support.v7.widget.RecyclerView; import android.view.View; import android.view.ViewGroup; import android.view.ViewTreeObserver; import com.xiaofeng.flowlayoutmanager.cache.CacheHelper; import com.xiaofeng.flowlayoutmanager.cache.Line; import java.util.LinkedList; import java.util.List; /** * Layout manager for flow views. support different view height, support item add/removed notification * support align to left/right edge. support scroll/smooth scroll. */ public class FlowLayoutManager extends RecyclerView.LayoutManager { private static final String LOG_TAG = "FlowLayoutManager"; RecyclerView recyclerView; int firstChildAdapterPosition = 0; RecyclerView.Recycler recyclerRef; FlowLayoutOptions flowLayoutOptions; FlowLayoutOptions newFlowLayoutOptions; LayoutHelper layoutHelper; CacheHelper cacheHelper; @Nullable private ViewTreeObserver.OnGlobalLayoutListener globalLayoutListener; public FlowLayoutManager() { flowLayoutOptions = new FlowLayoutOptions(); newFlowLayoutOptions = FlowLayoutOptions.clone(flowLayoutOptions); } @Override public RecyclerView.LayoutParams generateDefaultLayoutParams() { return new RecyclerView.LayoutParams(RecyclerView.LayoutParams.WRAP_CONTENT, RecyclerView.LayoutParams.WRAP_CONTENT); } @Override public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) { if (!cacheHelper.valid() && getChildCount() != 0) { return; } if (cacheHelper.contentAreaWidth() != layoutHelper.visibleAreaWidth()) { cacheHelper.contentAreaWidth(layoutHelper.visibleAreaWidth()); } recyclerRef = recycler; if (state.isPreLayout()) { onPreLayoutChildren(recycler, state); } else { cacheHelper.startBatchSetting(); onRealLayoutChildren(recycler); cacheHelper.endBatchSetting(); } } private void onPreLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) { // start from first view child int firstItemAdapterPosition = getChildAdapterPosition(0); if (firstItemAdapterPosition == RecyclerView.NO_POSITION) { detachAndScrapAttachedViews(recycler); return; } int currentItemPosition = firstItemAdapterPosition < 0 ? 0 : firstItemAdapterPosition; Point point = layoutHelper.layoutStartPoint(LayoutContext.fromLayoutOptions(flowLayoutOptions)); int x = point.x, y = point.y, height = 0; boolean newline; int real_x = point.x, real_y = point.y, real_height = 0; boolean real_newline; Rect rect = new Rect(); Rect real_rect = new Rect(); // detach all first. detachAndScrapAttachedViews(recycler); LayoutContext beforeContext = LayoutContext.fromLayoutOptions(flowLayoutOptions); // this option use old options alignment & new options line limit to calc items for animation. LayoutContext afterContext = LayoutContext.clone(beforeContext); afterContext.layoutOptions.itemsPerLine = newFlowLayoutOptions.itemsPerLine; // track before removed and after removed layout in same time, to make sure only add items at // bottom that visible after item removed. while (currentItemPosition < state.getItemCount()) { View child = recycler.getViewForPosition(currentItemPosition); boolean childRemoved = isChildRemoved(child); // act as removed view still there, to calc new items location. newline = calcChildLayoutRect(child, x, y, height, beforeContext, rect); if (newline) { point = startNewline(rect, beforeContext); x = point.x; y = point.y; height = rect.height(); beforeContext.currentLineItemCount = 1; } else { x = advanceInSameLine(x, rect, beforeContext); height = Math.max(height, rect.height()); beforeContext.currentLineItemCount ++; } if (!childRemoved) { real_newline = calcChildLayoutRect(child, real_x, real_y, real_height, afterContext, real_rect); if (real_newline) { point = startNewline(real_rect, afterContext); real_x = point.x; real_y = point.y; real_height = real_rect.height(); afterContext.currentLineItemCount = 1; } else { real_x = advanceInSameLine(real_x, real_rect, afterContext); real_height = Math.max(real_height, real_rect.height()); afterContext.currentLineItemCount ++; } } // stop add new view if after removal, new items are not visible. if (!childVisible(true, real_x, real_y, real_x + rect.width(), real_y + rect.height())) { recycler.recycleView(child); break; } else { if (childRemoved) { addDisappearingView(child); } else { addView(child); } layoutDecorated(child, rect.left, rect.top, rect.right, rect.bottom); } currentItemPosition ++; } flowLayoutOptions = FlowLayoutOptions.clone(newFlowLayoutOptions); } private void onRealLayoutChildren(RecyclerView.Recycler recycler) { detachAndScrapAttachedViews(recycler); Point startPoint = layoutStartPoint(); int x = startPoint.x, y = startPoint.y; int itemCount = getItemCount(); int height = 0; boolean newLine; Rect rect = new Rect(); LayoutContext layoutContext = LayoutContext.fromLayoutOptions(flowLayoutOptions); for (int i = firstChildAdapterPosition; i < itemCount; i ++) { View child = recycler.getViewForPosition(i); newLine = calcChildLayoutRect(child, x, y, height, layoutContext, rect); if (!childVisible(false, rect)) { recycler.recycleView(child); return; } else { addView(child); layoutDecorated(child, rect.left, rect.top, rect.right, rect.bottom); cacheHelper.setItem(i, new Point(rect.width(), rect.height())); } if (newLine) { Point lineInfo = startNewline(rect); x = lineInfo.x; y = lineInfo.y; height = rect.height(); layoutContext.currentLineItemCount = 1; } else { x = advanceInSameLine(x, rect, layoutContext); height = Math.max(height, rect.height()); layoutContext.currentLineItemCount ++; } } } @Override public boolean canScrollHorizontally() { return false; } @Override public boolean canScrollVertically() { if (getChildCount() == 0) { return false; } View firstChild = getChildAt(0); View lastChild = getChildAt(getChildCount() - 1); View topChild = getChildAt(getMaxHeightLayoutPositionInLine(0)); View bottomChild = getChildAt(getMaxHeightLayoutPositionInLine(getChildCount() - 1)); boolean topReached = false, bottomReached = false; if (getChildAdapterPosition(firstChild) == 0) { if (getDecoratedTop(topChild) >= topVisibleEdge()) { topReached = true; } } if (getChildAdapterPosition(lastChild) == recyclerView.getAdapter().getItemCount() - 1) { if (getDecoratedBottom(bottomChild) <= bottomVisibleEdge()) { bottomReached = true; } } return !(topReached && bottomReached); } @Override public int scrollVerticallyBy(int dy, RecyclerView.Recycler recycler, RecyclerView.State state) { if (dy == 0) { return 0; } if (getItemCount() == 0) { return 0; } View firstChild = getChildAt(0); View lastChild = getChildAt(getChildCount() - 1); View topChild = getChildAt(getMaxHeightLayoutPositionInLine(0)); View bottomChild = getChildAt(getMaxHeightLayoutPositionInLine(getChildCount() - 1)); boolean topReached = false, bottomReached = false; if (getChildAdapterPosition(firstChild) == 0) { if (getDecoratedTop(topChild) >= topVisibleEdge()) { topReached = true; } } if (getChildAdapterPosition(lastChild) == recyclerView.getAdapter().getItemCount() - 1) { if (getDecoratedBottom(bottomChild) <= bottomVisibleEdge()) { bottomReached = true; } } if (dy > 0 && bottomReached) { return 0; } if (dy < 0 && topReached) { return 0; } return dy > 0? contentMoveUp(dy, recycler) : contentMoveDown(dy, recycler); } @Override public void onItemsChanged(RecyclerView recyclerView) { this.flowLayoutOptions = FlowLayoutOptions.clone(newFlowLayoutOptions); if (cacheHelper != null) { cacheHelper.clear(); } cacheHelper = new CacheHelper(flowLayoutOptions.itemsPerLine, layoutHelper.visibleAreaWidth()); super.onItemsChanged(recyclerView); } @Override public void onItemsAdded(RecyclerView recyclerView, final int positionStart, final int itemCount) { cacheHelper.add(positionStart, itemCount); super.onItemsAdded(recyclerView, positionStart, itemCount); } @Override public void onItemsRemoved(RecyclerView recyclerView, final int positionStart, final int itemCount) { cacheHelper.remove(positionStart, itemCount); super.onItemsRemoved(recyclerView, positionStart, itemCount); } @Override public void onItemsUpdated(RecyclerView recyclerView, int positionStart, int itemCount) { cacheHelper.invalidSizes(positionStart, itemCount); super.onItemsUpdated(recyclerView, positionStart, itemCount); } @Override public void onItemsUpdated(RecyclerView recyclerView, int positionStart, int itemCount, Object payload) { cacheHelper.invalidSizes(positionStart, itemCount); super.onItemsUpdated(recyclerView, positionStart, itemCount, payload); } @Override public void onItemsMoved(RecyclerView recyclerView, final int from, final int to, int itemCount) { cacheHelper.move(from, to, itemCount); super.onItemsMoved(recyclerView, from, to, itemCount); } /** * Contents moving up to top */ private int contentMoveUp(int dy, RecyclerView.Recycler recycler) { int actualDy = dy; int maxHeightIndex = getMaxHeightLayoutPositionInLine(getChildCount() - 1); View maxHeightItem = getChildAt(maxHeightIndex); int offscreenBottom = getDecoratedBottom(maxHeightItem) - bottomVisibleEdge(); if (offscreenBottom >= dy) { offsetChildrenVertical(-dy); return dy; } while (getChildAdapterPosition(getChildCount() - 1) < getItemCount() - 1) { addNewLineAtBottom(recycler); maxHeightIndex = getMaxHeightLayoutPositionInLine(getChildCount() - 1); maxHeightItem = getChildAt(maxHeightIndex); offscreenBottom += getDecoratedMeasuredHeight(maxHeightItem); if (offscreenBottom >= dy) { break; } } if (offscreenBottom < dy) { actualDy = offscreenBottom; } offsetChildrenVertical(-actualDy); while (!lineVisible(0)) { recycleLine(0, recycler); } firstChildAdapterPosition = getChildAdapterPosition(0); return actualDy; } /** * Contents move down to bottom */ private int contentMoveDown(int dy, RecyclerView.Recycler recycler) { int actualDy = dy; int maxHeightItemIndex = getMaxHeightLayoutPositionInLine(0); View maxHeightItem = getChildAt(maxHeightItemIndex); // scrolling int offScreenTop = topVisibleEdge() - getDecoratedTop(maxHeightItem); if (offScreenTop > Math.abs(actualDy)) { offsetChildrenVertical(-dy); return dy; } while (getChildAdapterPosition(0) > 0) { addNewLineAtTop(recycler); maxHeightItemIndex = getMaxHeightLayoutPositionInLine(0); maxHeightItem = getChildAt(maxHeightItemIndex); offScreenTop += getDecoratedMeasuredHeight(maxHeightItem); if (offScreenTop >= Math.abs(dy)) { break; } } if (offScreenTop < Math.abs(dy)) { actualDy = -offScreenTop; } offsetChildrenVertical(-actualDy); while (!lineVisible(getChildCount() - 1)) { recycleLine(getChildCount() - 1, recycler); } firstChildAdapterPosition = getChildAdapterPosition(0); return actualDy; } /** * Add new line of elements at top, to keep layout, have to virtually layout from beginning. * Here is an example to explain why: Say total width is 10, current line is [5, 2, 1], 3 numbers * before current line is 7, 2, 6. If you just look back, you could say previous line [2, 6], but there * is another possibility: [7, 2], [6]. You don't know which one is correct without knowing how the line * before previous one, same thing could happen to that line too, so you have to sort everything from beginning * or cache the result. */ private void addNewLineAtTop(RecyclerView.Recycler recycler) { int x = layoutStartPoint().x, bottom = getDecoratedTop(getChildAt(getMaxHeightLayoutPositionInLine(0))), y; int height = 0; List lineChildren = new LinkedList<>(); int currentAdapterPosition = 0; int endAdapterPosition = getChildAdapterPosition(0) - 1; Rect rect = new Rect(); boolean newline; boolean firstItem = true; LayoutContext layoutContext = LayoutContext.fromLayoutOptions(flowLayoutOptions); int firstItemAdapterPosition = getChildAdapterPosition(0); if (cacheHelper.hasPreviousLineCached(firstItemAdapterPosition)) { int previousLineIndex = cacheHelper.itemLineIndex(firstItemAdapterPosition) - 1; Line previousLine = cacheHelper.getLine(previousLineIndex); int firstNewItemAdapterPosition = cacheHelper.firstItemIndex(previousLineIndex); for (int i = 0; i < previousLine.itemCount; i ++) { View newView = recycler.getViewForPosition(firstNewItemAdapterPosition + i); addView(newView, i); lineChildren.add(newView); } height = previousLine.maxHeight; } else { while (currentAdapterPosition <= endAdapterPosition) { View newChild = recycler.getViewForPosition(currentAdapterPosition); newline = calcChildLayoutRect(newChild, x, 0, height, layoutContext, rect); cacheHelper.setItem(currentAdapterPosition, new Point(rect.width(), rect.height())); // add view to make sure not be recycled. addView(newChild, lineChildren.size()); if (newline && !firstItem) { // end of one line, but not reach the top line yet. recycle the line and // move on to next. for (View viewToRecycle : lineChildren) { removeAndRecycleView(viewToRecycle, recycler); } lineChildren.clear(); x = advanceInSameLine(layoutStartPoint().x, rect, layoutContext); height = rect.height(); layoutContext.currentLineItemCount = 1; } else { x = advanceInSameLine(x, rect, layoutContext); height = Math.max(height, rect.height()); firstItem = false; layoutContext.currentLineItemCount++; } lineChildren.add(newChild); currentAdapterPosition++; } } x = layoutStartPoint().x; y = bottom - height; firstItem = true; layoutContext = LayoutContext.fromLayoutOptions(flowLayoutOptions); for (int i = 0; i < lineChildren.size(); i ++) { View childView = lineChildren.get(i); newline = calcChildLayoutRect(childView, x, y, height, layoutContext, rect); if (newline && firstItem) { int rectHeight = rect.height(); rect.top -= rectHeight; rect.bottom -= rectHeight; firstItem = false; } layoutDecorated(childView, rect.left, rect.top, rect.right, rect.bottom); x = advanceInSameLine(x, rect, layoutContext); } } /** * Add new line at bottom of views. */ private void addNewLineAtBottom(RecyclerView.Recycler recycler) { int x = layoutStartPoint().x, y = getDecoratedBottom(getChildAt(getMaxHeightLayoutPositionInLine(getChildCount() - 1))); int childAdapterPosition = getChildAdapterPosition(getChildCount() - 1) + 1; // no item to add if (childAdapterPosition == getItemCount()) { return; } Rect rect = new Rect(); boolean newline; boolean firstItem = true; LayoutContext layoutContext = LayoutContext.fromLayoutOptions(flowLayoutOptions); while (childAdapterPosition < getItemCount()) { View newChild = recycler.getViewForPosition(childAdapterPosition); newline = calcChildLayoutRect(newChild, x, y, 0, layoutContext, rect); cacheHelper.setItem(childAdapterPosition, new Point(rect.width(), rect.height())); if (newline && !firstItem) { recycler.recycleView(newChild); layoutContext.currentLineItemCount = 1; return; } else { addView(newChild); layoutDecorated(newChild, rect.left, rect.top, rect.right, rect.bottom); x = advanceInSameLine(x, rect, layoutContext); childAdapterPosition ++; firstItem = false; layoutContext.currentLineItemCount ++; } } } @Override public void onAttachedToWindow(final RecyclerView view) { super.onAttachedToWindow(view); this.recyclerView = view; layoutHelper = new LayoutHelper(this, recyclerView); cacheHelper = new CacheHelper(flowLayoutOptions.itemsPerLine, layoutHelper.visibleAreaWidth()); if (layoutHelper.visibleAreaWidth() == 0) { if (globalLayoutListener == null) { globalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() { @Override public void onGlobalLayout() { view.getViewTreeObserver().removeOnGlobalLayoutListener(this); globalLayoutListener = null; cacheHelper.contentAreaWidth(layoutHelper.visibleAreaWidth()); } }; } view.getViewTreeObserver().addOnGlobalLayoutListener(globalLayoutListener); } } @Override public void onDetachedFromWindow(RecyclerView view, RecyclerView.Recycler recycler) { super.onDetachedFromWindow(view, recycler); if (globalLayoutListener != null) { view.getViewTreeObserver().removeOnGlobalLayoutListener(globalLayoutListener); globalLayoutListener = null; } } @Override public boolean supportsPredictiveItemAnimations() { return true; } @Override public void scrollToPosition(int position) { firstChildAdapterPosition = position; requestLayout(); } @Override public void smoothScrollToPosition(final RecyclerView recyclerView, final RecyclerView.State state, int position) { RecyclerView.SmoothScroller smoothScroller = new LinearSmoothScroller(recyclerView.getContext()) { @Override public PointF computeScrollVectorForPosition(int targetPosition) { return new PointF(0, getOffsetOfItemToFirstChild(targetPosition, recyclerRef)); } }; smoothScroller.setTargetPosition(position); startSmoothScroll(smoothScroller); } @Override public void setAutoMeasureEnabled(boolean enabled) { super.setAutoMeasureEnabled(enabled); } private int leftVisibleEdge() { return getPaddingLeft(); } private int rightVisibleEdge() { return getWidth() - getPaddingRight(); } private int topVisibleEdge() { return getPaddingTop(); } private int bottomVisibleEdge() { return getHeight() - getPaddingBottom(); } private boolean childVisible(boolean preLayout, int left, int top, int right, int bottom) { if (recyclerView.getLayoutParams().height == ViewGroup.LayoutParams.WRAP_CONTENT) { return true; } return Rect.intersects(new Rect(leftVisibleEdge(), topVisibleEdge(), rightVisibleEdge(), bottomVisibleEdge()), new Rect(left, top, right, bottom)); } private boolean childVisible(boolean preLayout, Rect childRect) { if (!preLayout && recyclerView.getLayoutParams().height == ViewGroup.LayoutParams.WRAP_CONTENT) { return true; } return Rect.intersects(new Rect(leftVisibleEdge(), topVisibleEdge(), rightVisibleEdge(), bottomVisibleEdge()), childRect); } private int getMaxHeightLayoutPositionInLine(int layoutPosition) { final View child = getChildAt(layoutPosition); int maxIndexBefore = layoutPosition, maxIndexAfter = layoutPosition, maxHeightBefore = getDecoratedMeasuredHeight(child), maxHeightAfter = getDecoratedMeasuredHeight(child); int currentIndex = layoutPosition; LayoutContext layoutContext = LayoutContext.fromLayoutOptions(flowLayoutOptions); while (currentIndex >= 0 && !isStartOfLine(currentIndex, layoutContext)) { final View beforeChild = getChildAt(currentIndex); if (getDecoratedMeasuredHeight(beforeChild) > maxHeightBefore) { maxIndexBefore = currentIndex; maxHeightBefore = getDecoratedMeasuredHeight(beforeChild); } currentIndex --; } // count in first one in line if (maxHeightBefore < getDecoratedMeasuredHeight(getChildAt(currentIndex))) { maxIndexBefore = currentIndex; maxHeightBefore = getDecoratedMeasuredHeight(getChildAt(currentIndex)); } currentIndex = layoutPosition; while (currentIndex < getChildCount() && !isEndOfLine(currentIndex, layoutContext)) { final View afterChild = getChildAt(currentIndex); if (getDecoratedMeasuredHeight(afterChild) > maxHeightAfter) { maxIndexAfter = currentIndex; maxHeightAfter = getDecoratedMeasuredHeight(afterChild); } currentIndex ++; } // count in last one in line if (maxHeightAfter < getDecoratedMeasuredHeight(getChildAt(currentIndex))) { maxIndexAfter = currentIndex; maxHeightAfter = getDecoratedMeasuredHeight(getChildAt(currentIndex)); } if (maxHeightBefore >= maxHeightAfter) { return maxIndexBefore; } return maxIndexAfter; } private List getAllViewsInLine(int index) { int firstItemIndex = index; while(!isStartOfLine(firstItemIndex)) { firstItemIndex --; } List viewList = new LinkedList<>(); viewList.add(getChildAt(firstItemIndex)); int nextItemIndex = firstItemIndex + 1; LayoutContext layoutContext = LayoutContext.fromLayoutOptions(flowLayoutOptions); while (nextItemIndex < getChildCount() && !isStartOfLine(nextItemIndex, layoutContext)) { viewList.add(getChildAt(nextItemIndex)); nextItemIndex ++; } return viewList; } private int getChildAdapterPosition(int layoutPosition) { return getChildAdapterPosition(getChildAt(layoutPosition)); } private int getChildAdapterPosition(View child) { if (child == null) { return RecyclerView.NO_POSITION; } return ((RecyclerView.LayoutParams)child.getLayoutParams()).getViewAdapterPosition(); } public int getChildLayoutPosition(View child) { return ((RecyclerView.LayoutParams)child.getLayoutParams()).getViewLayoutPosition(); } private boolean lineVisible(int index) { int maxHeightItemIndex = getMaxHeightLayoutPositionInLine(index); View maxHeightItem = getChildAt(maxHeightItemIndex); return Rect.intersects(new Rect(leftVisibleEdge(), topVisibleEdge(), rightVisibleEdge(), bottomVisibleEdge()), new Rect(leftVisibleEdge(), getDecoratedTop(maxHeightItem), rightVisibleEdge(), getDecoratedBottom(maxHeightItem))); } private void recycleLine(int index, RecyclerView.Recycler recycler) { List viewList = getAllViewsInLine(index); for (View viewToRecycle : viewList) { removeAndRecycleView(viewToRecycle, recycler); } } private int getOffsetOfItemToFirstChild(int adapterPosition, RecyclerView.Recycler recycler) { int firstChildPosition = getChildAdapterPosition(0); if (firstChildPosition == adapterPosition) { // first child is target, just make sure it is fully visible. return topVisibleEdge() - getDecoratedTop(getChildAt(0)); } if (adapterPosition > firstChildPosition) { int lastChildAdapterPosition = getChildAdapterPosition(getChildCount() - 1); // target child in screen, no need to calc. if (lastChildAdapterPosition >= adapterPosition) { int targetChildIndex = getChildCount() - 1 - (lastChildAdapterPosition - adapterPosition); return getDecoratedTop(getChildAt(targetChildIndex)) - topVisibleEdge(); } else { // target child is below screen edge int y = getDecoratedBottom(getChildAt(getMaxHeightLayoutPositionInLine(getChildCount() - 1))) - topVisibleEdge(); int targetAdapterPosition = lastChildAdapterPosition + 1; int x = layoutStartPoint().x; int height = 0; Rect rect = new Rect(); boolean newline; LayoutContext layoutContext = LayoutContext.fromLayoutOptions(flowLayoutOptions); while (targetAdapterPosition != adapterPosition) { View nextChild = recycler.getViewForPosition(targetAdapterPosition); newline = calcChildLayoutRect(nextChild, x, y, height, layoutContext, rect); if (newline) { x = advanceInSameLine(layoutStartPoint().x, rect, layoutContext); y = rect.top; height = rect.height(); layoutContext.currentLineItemCount = 1; } else { x = advanceInSameLine(x, rect, layoutContext); height = Math.max(height, getDecoratedMeasuredHeight(nextChild)); layoutContext.currentLineItemCount ++; } recycler.recycleView(nextChild); targetAdapterPosition ++; } return y; } } else { // target is off screen top, Need to start from beginning in data set int targetAdapterPosition = 0, x = layoutStartPoint().x, height = 0; int y = topVisibleEdge() - getDecoratedTop(getChildAt(0)); Rect rect = new Rect(); boolean newline; LayoutContext layoutContext = LayoutContext.fromLayoutOptions(flowLayoutOptions); while (targetAdapterPosition <= firstChildPosition) { View child = recycler.getViewForPosition(targetAdapterPosition); newline = calcChildLayoutRect(child, x, y, height, rect); if (newline) { x = advanceInSameLine(layoutStartPoint().x, rect); height = rect.height(); if (targetAdapterPosition >= adapterPosition) { y += height; } layoutContext.currentLineItemCount = 1; } else { x = advanceInSameLine(x, rect); height = Math.max(height, getDecoratedMeasuredHeight(child)); layoutContext.currentLineItemCount ++; } targetAdapterPosition ++; } return -y; } } /** * Is child has been marked as removed. */ private boolean isChildRemoved(View child) { return ((RecyclerView.LayoutParams)child.getLayoutParams()).isItemRemoved(); } public FlowLayoutManager setAlignment(Alignment alignment) { newFlowLayoutOptions.alignment = alignment; return this; } public FlowLayoutManager singleItemPerLine() { if (layoutHelper == null) { flowLayoutOptions.itemsPerLine = 1; } else { newFlowLayoutOptions.itemsPerLine = 1; } if (cacheHelper != null) { cacheHelper.clear(); } if (layoutHelper != null) { cacheHelper = new CacheHelper(1, layoutHelper.visibleAreaWidth()); } return this; } public FlowLayoutManager maxItemsPerLine(int itemsPerLine) { if (layoutHelper == null) { flowLayoutOptions.itemsPerLine = itemsPerLine; } else { newFlowLayoutOptions.itemsPerLine = itemsPerLine; } if (cacheHelper != null) { cacheHelper.clear(); } if (layoutHelper != null) { cacheHelper = new CacheHelper(itemsPerLine, layoutHelper.visibleAreaWidth()); } return this; } public FlowLayoutManager removeItemPerLineLimit() { if (layoutHelper == null) { flowLayoutOptions.itemsPerLine = FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT; } else { newFlowLayoutOptions.itemsPerLine = FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT; } if (cacheHelper != null) { cacheHelper.clear(); } if (layoutHelper != null) { cacheHelper = new CacheHelper(FlowLayoutOptions.ITEM_PER_LINE_NO_LIMIT, layoutHelper.visibleAreaWidth()); } return this; } /*****************alignment related functions*****************/ private boolean calcChildLayoutRect(View child, int x, int y, int lineHeight, Rect rect) { return calcChildLayoutRect(child, x, y, lineHeight, LayoutContext.fromLayoutOptions(flowLayoutOptions), rect); } private boolean calcChildLayoutRect(View child, int x, int y, int lineHeight, LayoutContext layoutContext, Rect rect) { boolean newLine; measureChildWithMargins(child, 0, 0); int childWidth = getDecoratedMeasuredWidth(child); int childHeight = getDecoratedMeasuredHeight(child); switch (layoutContext.layoutOptions.alignment) { case RIGHT: if (LayoutHelper.shouldStartNewline(x, childWidth, leftVisibleEdge(), rightVisibleEdge(), layoutContext)) { newLine = true; rect.left = rightVisibleEdge() - childWidth; rect.top = y + lineHeight; rect.right = rightVisibleEdge(); rect.bottom = rect.top + childHeight; } else { newLine = false; rect.left = x - childWidth; rect.top = y; rect.right = x; rect.bottom = rect.top + childHeight; } break; case LEFT: default: if (LayoutHelper.shouldStartNewline(x, childWidth, leftVisibleEdge(), rightVisibleEdge(), layoutContext)) { newLine = true; rect.left = leftVisibleEdge(); rect.top = y + lineHeight; rect.right = rect.left + childWidth; rect.bottom = rect.top + childHeight; } else { newLine = false; rect.left = x; rect.top = y; rect.right = rect.left + childWidth; rect.bottom = rect.top + childHeight; } break; } return newLine; } private Point startNewline(Rect rect) { return startNewline(rect, LayoutContext.fromLayoutOptions(flowLayoutOptions)); } private Point startNewline(Rect rect, LayoutContext layoutContext) { switch (layoutContext.layoutOptions.alignment) { case RIGHT: return new Point(rightVisibleEdge() - rect.width(), rect.top); case LEFT: default: return new Point(leftVisibleEdge() + rect.width(), rect.top); } } private int advanceInSameLine(int x, Rect rect) { return advanceInSameLine(x, rect, LayoutContext.fromLayoutOptions(flowLayoutOptions)); } private int advanceInSameLine(int x, Rect rect, LayoutContext layoutContext) { switch (layoutContext.layoutOptions.alignment) { case RIGHT: return x - rect.width(); case LEFT: default: return x + rect.width(); } } private Point layoutStartPoint() { return layoutHelper.layoutStartPoint(LayoutContext.fromLayoutOptions(flowLayoutOptions)); } private boolean isStartOfLine(int index) { return isStartOfLine(index, LayoutContext.fromLayoutOptions(flowLayoutOptions)); } private boolean isStartOfLine(int index, LayoutContext layoutContext) { if (index == 0) { return true; } else { switch (layoutContext.layoutOptions.alignment) { case RIGHT: return getDecoratedRight(getChildAt(index)) >= rightVisibleEdge(); case LEFT: default: return getDecoratedLeft(getChildAt(index)) <= leftVisibleEdge(); } } } private boolean isEndOfLine(int index) { return isEndOfLine(index, LayoutContext.fromLayoutOptions(flowLayoutOptions)); } private boolean isEndOfLine(int index, LayoutContext layoutContext) { if (LayoutHelper.hasItemsPerLineLimit(layoutContext.layoutOptions) && layoutContext.currentLineItemCount == layoutContext.layoutOptions.itemsPerLine) { return true; } if (getChildCount() == 0 || index == getChildCount() - 1) { return true; } return isStartOfLine(index + 1, layoutContext); } } ================================================ FILE: flowlayoutmanager/src/main/java/com/xiaofeng/flowlayoutmanager/FlowLayoutOptions.java ================================================ package com.xiaofeng.flowlayoutmanager; /** * Created by xhan on 4/11/16. */ public class FlowLayoutOptions { public static final int ITEM_PER_LINE_NO_LIMIT = 0; public Alignment alignment = Alignment.LEFT; public int itemsPerLine = ITEM_PER_LINE_NO_LIMIT; public static FlowLayoutOptions clone(FlowLayoutOptions layoutOptions) { FlowLayoutOptions result = new FlowLayoutOptions(); result.alignment = layoutOptions.alignment; result.itemsPerLine = layoutOptions.itemsPerLine; return result; } } ================================================ FILE: flowlayoutmanager/src/main/java/com/xiaofeng/flowlayoutmanager/LayoutContext.java ================================================ package com.xiaofeng.flowlayoutmanager; /** * Created by xhan on 4/11/16. */ public class LayoutContext { public FlowLayoutOptions layoutOptions; public int currentLineItemCount; public static LayoutContext clone(LayoutContext layoutContext) { LayoutContext resultContext = new LayoutContext(); resultContext.currentLineItemCount = layoutContext.currentLineItemCount; resultContext.layoutOptions = FlowLayoutOptions.clone(layoutContext.layoutOptions); return resultContext; } public static LayoutContext fromLayoutOptions(FlowLayoutOptions layoutOptions) { LayoutContext layoutContext = new LayoutContext(); layoutContext.layoutOptions = layoutOptions; return layoutContext; } } ================================================ FILE: flowlayoutmanager/src/main/java/com/xiaofeng/flowlayoutmanager/LayoutHelper.java ================================================ package com.xiaofeng.flowlayoutmanager; import android.graphics.Point; import android.support.v7.widget.RecyclerView; /** * Created by xhan on 4/11/16. */ public class LayoutHelper { RecyclerView.LayoutManager layoutManager; RecyclerView recyclerView; public LayoutHelper(RecyclerView.LayoutManager layoutManager, RecyclerView recyclerView) { this.layoutManager = layoutManager; this.recyclerView = recyclerView; } public int leftVisibleEdge() { return recyclerView.getPaddingLeft(); } public int rightVisibleEdge() { return layoutManager.getWidth() - layoutManager.getPaddingRight(); } public int visibleAreaWidth() { return rightVisibleEdge() - leftVisibleEdge(); } public int topVisibleEdge() { return layoutManager.getPaddingTop(); } public int bottomVisibleEdge() { return layoutManager.getHeight() - layoutManager.getPaddingBottom(); } public static boolean hasItemsPerLineLimit(FlowLayoutOptions layoutOptions) { return layoutOptions.itemsPerLine > 0; } public static boolean shouldStartNewline(int x, int childWidth, int leftEdge, int rightEdge, LayoutContext layoutContext) { if (hasItemsPerLineLimit(layoutContext.layoutOptions) && layoutContext.currentLineItemCount == layoutContext.layoutOptions.itemsPerLine) { return true; } switch (layoutContext.layoutOptions.alignment) { case RIGHT: return x - childWidth < leftEdge; case LEFT: default: return x + childWidth > rightEdge; } } public Point layoutStartPoint(LayoutContext layoutContext) { switch (layoutContext.layoutOptions.alignment) { case RIGHT: return new Point(rightVisibleEdge(), topVisibleEdge()); default: return new Point(leftVisibleEdge(), topVisibleEdge()); } } } ================================================ FILE: flowlayoutmanager/src/main/java/com/xiaofeng/flowlayoutmanager/cache/CacheHelper.java ================================================ package com.xiaofeng.flowlayoutmanager.cache; import android.graphics.Point; import android.util.SparseArray; /** * A Helper class that will save Line information (items count, total width etc.) and will be used * for layout, that will avoid low efficiency layout */ public class CacheHelper { public static final int NOT_FOUND = -1; /** * Item per line limit, set to 0 if no limit */ final int itemPerLine; /** * The area width for content layout, must be greater than zero */ int contentAreaWidth; SparseArray sizeMap; SparseArray lineMap; boolean batchSetting = false; public CacheHelper(int itemsPerLine, int contentAreaWidth) { this.itemPerLine = itemsPerLine; this.contentAreaWidth = contentAreaWidth; sizeMap = new SparseArray<>(); lineMap = new SparseArray<>(); } /** * Add measured items into cache */ public void add(int startIndex, Point... sizes) { if (!valid()) { return; } invalidateLineMapAfter(startIndex); makeSpace(startIndex, sizes.length); int index = startIndex; for (Point size : sizes) { sizeMap.put(index ++, size); } refreshLineMap(); } /** * Make space for {@param count} items */ public void add(int startIndex, int count) { if (!valid()) { return; } invalidateLineMapAfter(startIndex); makeSpace(startIndex, count); refreshLineMap(); } /** * Sizes has been changed and new sizes not available yet, just remove them from cache * The line map will also be invalidate after the invalidated items * @param index * @param count */ public void invalidSizes(int index, int count) { if (!valid()) { return; } invalidateLineMapAfter(index); int actualCount = actualCount(index, count); for (int i = 0; i < actualCount; i ++) { sizeMap.remove(index + i); } refreshLineMap(); } public void remove(int index, int count) { if (!valid()) { return; } invalidateLineMapAfter(index); int actualCount = actualCount(index, count); for (int i = 0; i < actualCount; i ++) { sizeMap.remove(index + i); } // move everything behind to fill the hole. for (int i = index + actualCount; i < sizeMap.size() + actualCount; i ++) { Point tmp = sizeMap.get(i); sizeMap.remove(i); sizeMap.put(i - actualCount, tmp); } refreshLineMap(); } public void setItem(int index, Point newSize) { if (!valid()) { return; } if (sizeMap.get(index, null) != null) { Point cachedPoint = sizeMap.get(index); if (!cachedPoint.equals(newSize)) { invalidateLineMapAfter(index); sizeMap.put(index, newSize); refreshLineMap(); } } else { invalidateLineMapAfter(index); sizeMap.put(index, newSize); refreshLineMap(); } } /** * Move items from one place to another. no check on parameter as invoker will make sure it is correct */ public void move(int from, int to, int count) { if (!valid()) { return; } invalidateLineMapAfter(Math.min(from, to)); Point[] itemsToMove = new Point[count]; for (int i = from; i < from + count; i ++) { itemsToMove[i - from] = sizeMap.get(i); } boolean movingForward = from - to > 0; int itemsToShift = Math.abs(from - to); if (!movingForward) { itemsToShift -= count; } int shiftIndex = movingForward ? from - 1 : from + count; int shiftIndexStep = movingForward ? -1 : 1; int shifted = 0; while (shifted < itemsToShift) { sizeMap.put(shiftIndex - (shiftIndexStep) * count, sizeMap.get(shiftIndex)); shiftIndex += shiftIndexStep; shifted ++; } int setIndex = to; if (!movingForward) { setIndex = from + itemsToShift; } for (Point item : itemsToMove) { sizeMap.put(setIndex++, item); } refreshLineMap(); } public int[] getLineMap() { if (!valid()) { return new int[0]; } int[] lineCounts = new int[this.lineMap.size()]; for (int i = 0; i < this.lineMap.size(); i ++) { lineCounts[i] = this.lineMap.get(i).itemCount; } return lineCounts; } public int itemLineIndex(int itemIndex) { if (!valid()) { return NOT_FOUND; } int itemCount = 0; for (int i = 0; i < lineMap.size(); i ++) { itemCount += lineMap.get(i).itemCount; if (itemCount >= itemIndex + 1) { return i; } } return NOT_FOUND; } public Line containingLine(int itemIndex) { if (!valid()) { return null; } return getLine(itemLineIndex(itemIndex)); } public int firstItemIndex(int lineIndex) { if (!valid()) { return NOT_FOUND; } int itemCount = 0; for (int i = 0; i < lineIndex; i ++) { itemCount += lineMap.get(i).itemCount; } return itemCount; } public Line getLine(int lineIndex) { if (!valid()) { return null; } return lineMap.get(lineIndex, null); } public boolean hasPreviousLineCached(int itemIndex) { if (!valid()) { return false; } int lineIndex = itemLineIndex(itemIndex); if (lineIndex == NOT_FOUND) { return false; } if (lineIndex > 0) { return true; } return false; } public boolean hasNextLineCached(int itemIndex) { if (!valid()) { return false; } int lineIndex = itemLineIndex(itemIndex); if (lineIndex == NOT_FOUND) { return false; } return !lineMap.get(lineIndex + 1, Line.EMPTY_LINE).equals(Line.EMPTY_LINE); } public void clear() { sizeMap.clear(); lineMap.clear(); } public void contentAreaWidth(int width) { contentAreaWidth = width; lineMap.clear(); refreshLineMap(); } public int contentAreaWidth() { return contentAreaWidth; } public boolean valid() { return contentAreaWidth > 0; } public void startBatchSetting() { batchSetting = true; } public void endBatchSetting() { batchSetting = false; lineMap.clear(); refreshLineMap(); } //===================== Helper methods ======================== /** * Move item after startIndex to make {count} space(s) */ private void makeSpace(int startIndex, int count) { for (int i = sizeMap.size() - 1; i >= startIndex; i --) { sizeMap.put(i + count, sizeMap.get(i)); } for (int i = startIndex; i < startIndex + count; i ++) { sizeMap.remove(i); } } /** * Rebuild line map. and should stop if there is a hole (like item changed or item inserted but not measured) */ private void refreshLineMap() { if (!valid() || batchSetting) { return; } int index = refreshLineMapStartIndex(); Point cachedSize = sizeMap.get(index, null); int lineIndex = lineMap.size(); int lineItemCount = 0; Line currentLine = containingLine(index); if (currentLine == null) { currentLine = new Line(); } else { lineIndex = itemLineIndex(index); } int lineWidth = currentLine.totalWidth; while (cachedSize != null) { lineWidth += cachedSize.x; lineItemCount ++; if (lineWidth <= contentAreaWidth) { if (itemPerLine > 0) { // have item per line limit if (lineItemCount > itemPerLine) { // exceed item per line limit lineMap.put(lineIndex, currentLine); // put this item to next line currentLine = new Line(); addToLine(currentLine, cachedSize, index); lineIndex ++; lineWidth = cachedSize.x; lineItemCount = 1; } else { addToLine(currentLine, cachedSize, index); } } else { addToLine(currentLine, cachedSize, index); } } else { // too wide to add this item, put line item count to index and put this one to new line lineMap.put(lineIndex, currentLine); currentLine = new Line(); addToLine(currentLine, cachedSize, index); lineIndex ++; lineWidth = cachedSize.x; lineItemCount = 1; } index ++; cachedSize = sizeMap.get(index, null); } if (currentLine.itemCount > 0) { lineMap.append(lineIndex, currentLine); } } /** * Add view info to line */ private void addToLine(Line line, Point item, int index) { line.itemCount ++; line.totalWidth += item.x; line.maxHeight = item.y > line.maxHeight ? item.y : line.maxHeight; if (item.y == line.maxHeight) { line.maxHeightIndex = index; } } /** * return actual count from index to expected count or end of sizeMap */ private int actualCount(int index, int count) { return index + count > sizeMap.size() ? sizeMap.size() - index : count; } /** * Invalidate line map that contains item and all lines after * @param itemIndex */ private void invalidateLineMapAfter(int itemIndex) { if (batchSetting) { return; } int itemLineIndex = itemLineIndex(itemIndex); Line line = lineMap.get(itemLineIndex, null); if (line == null && lineMap.size() > 0) { lineMap.remove(lineMap.size() - 1); } while (line != null) { lineMap.remove(itemLineIndex); itemLineIndex ++; line = lineMap.get(itemLineIndex, null); } } private int refreshLineMapStartIndex() { int itemCount = 0; for (int i = 0; i < lineMap.size(); i ++) { itemCount += lineMap.get(i).itemCount; } if (itemCount >= sizeMap.size()) { return NOT_FOUND; } return itemCount; } } ================================================ FILE: flowlayoutmanager/src/main/java/com/xiaofeng/flowlayoutmanager/cache/Line.java ================================================ package com.xiaofeng.flowlayoutmanager.cache; /** * Created by xhan on 4/28/16. */ public class Line { public int itemCount; public int totalWidth; public int maxHeight; public int maxHeightIndex; public static final Line EMPTY_LINE = new Line(); public Line() { itemCount = 0; totalWidth = 0; maxHeight = 0; maxHeightIndex = -1; } public Line clone() { Line clone = new Line(); clone.itemCount = itemCount; clone.totalWidth = totalWidth; clone.maxHeight = maxHeight; clone.maxHeightIndex = maxHeightIndex; return clone; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Line line = (Line) o; if (itemCount != line.itemCount) return false; if (totalWidth != line.totalWidth) return false; if (maxHeight != line.maxHeight) return false; return maxHeightIndex == line.maxHeightIndex; } @Override public int hashCode() { int result = itemCount; result = 31 * result + totalWidth; result = 31 * result + maxHeight; result = 31 * result + maxHeightIndex; return result; } @Override public String toString() { return "Line{" + "itemCount=" + itemCount + ", totalWidth=" + totalWidth + ", maxHeight=" + maxHeight + ", maxHeightIndex=" + maxHeightIndex + '}'; } } ================================================ FILE: flowlayoutmanager/src/main/res/values/strings.xml ================================================ FlowLayoutManager ================================================ FILE: gradle/wrapper/gradle-wrapper.properties ================================================ #Wed Oct 21 11:34:03 PDT 2015 distributionBase=GRADLE_USER_HOME distributionPath=wrapper/dists zipStoreBase=GRADLE_USER_HOME zipStorePath=wrapper/dists distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip ================================================ FILE: gradle.properties ================================================ # Project-wide Gradle settings. # IDE (e.g. Android Studio) users: # Gradle settings configured through the IDE *will override* # any settings specified in this file. # For more details on how to configure your build environment visit # http://www.gradle.org/docs/current/userguide/build_environment.html # Specifies the JVM arguments used for the daemon process. # The setting is particularly useful for tweaking memory settings. # Default value: -Xmx10248m -XX:MaxPermSize=256m # org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8 # When configured, Gradle will run in incubating parallel mode. # This option should only be used with decoupled projects. More details, visit # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects # org.gradle.parallel=true ================================================ FILE: gradlew ================================================ #!/usr/bin/env bash ############################################################################## ## ## Gradle start up script for UN*X ## ############################################################################## # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. DEFAULT_JVM_OPTS="" APP_NAME="Gradle" APP_BASE_NAME=`basename "$0"` # Use the maximum available, or set MAX_FD != -1 to use that value. MAX_FD="maximum" warn ( ) { echo "$*" } die ( ) { echo echo "$*" echo exit 1 } # OS specific support (must be 'true' or 'false'). cygwin=false msys=false darwin=false case "`uname`" in CYGWIN* ) cygwin=true ;; Darwin* ) darwin=true ;; MINGW* ) msys=true ;; esac # Attempt to set APP_HOME # Resolve links: $0 may be a link PRG="$0" # Need this for relative symlinks. while [ -h "$PRG" ] ; do ls=`ls -ld "$PRG"` link=`expr "$ls" : '.*-> \(.*\)$'` if expr "$link" : '/.*' > /dev/null; then PRG="$link" else PRG=`dirname "$PRG"`"/$link" fi done SAVED="`pwd`" cd "`dirname \"$PRG\"`/" >/dev/null APP_HOME="`pwd -P`" cd "$SAVED" >/dev/null CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar # Determine the Java command to use to start the JVM. if [ -n "$JAVA_HOME" ] ; then if [ -x "$JAVA_HOME/jre/sh/java" ] ; then # IBM's JDK on AIX uses strange locations for the executables JAVACMD="$JAVA_HOME/jre/sh/java" else JAVACMD="$JAVA_HOME/bin/java" fi if [ ! -x "$JAVACMD" ] ; then die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME Please set the JAVA_HOME variable in your environment to match the location of your Java installation." fi else JAVACMD="java" which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. Please set the JAVA_HOME variable in your environment to match the location of your Java installation." fi # Increase the maximum file descriptors if we can. if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then MAX_FD_LIMIT=`ulimit -H -n` if [ $? -eq 0 ] ; then if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then MAX_FD="$MAX_FD_LIMIT" fi ulimit -n $MAX_FD if [ $? -ne 0 ] ; then warn "Could not set maximum file descriptor limit: $MAX_FD" fi else warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" fi fi # For Darwin, add options to specify how the application appears in the dock if $darwin; then GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" fi # For Cygwin, switch paths to Windows format before running java if $cygwin ; then APP_HOME=`cygpath --path --mixed "$APP_HOME"` CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` JAVACMD=`cygpath --unix "$JAVACMD"` # We build the pattern for arguments to be converted via cygpath ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` SEP="" for dir in $ROOTDIRSRAW ; do ROOTDIRS="$ROOTDIRS$SEP$dir" SEP="|" done OURCYGPATTERN="(^($ROOTDIRS))" # Add a user-defined pattern to the cygpath arguments if [ "$GRADLE_CYGPATTERN" != "" ] ; then OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" fi # Now convert the arguments - kludge to limit ourselves to /bin/sh i=0 for arg in "$@" ; do CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` else eval `echo args$i`="\"$arg\"" fi i=$((i+1)) done case $i in (0) set -- ;; (1) set -- "$args0" ;; (2) set -- "$args0" "$args1" ;; (3) set -- "$args0" "$args1" "$args2" ;; (4) set -- "$args0" "$args1" "$args2" "$args3" ;; (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; esac fi # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules function splitJvmOpts() { JVM_OPTS=("$@") } eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME" exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@" ================================================ FILE: gradlew.bat ================================================ @if "%DEBUG%" == "" @echo off @rem ########################################################################## @rem @rem Gradle startup script for Windows @rem @rem ########################################################################## @rem Set local scope for the variables with windows NT shell if "%OS%"=="Windows_NT" setlocal @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. set DEFAULT_JVM_OPTS= set DIRNAME=%~dp0 if "%DIRNAME%" == "" set DIRNAME=. set APP_BASE_NAME=%~n0 set APP_HOME=%DIRNAME% @rem Find java.exe if defined JAVA_HOME goto findJavaFromJavaHome set JAVA_EXE=java.exe %JAVA_EXE% -version >NUL 2>&1 if "%ERRORLEVEL%" == "0" goto init echo. echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. echo. echo Please set the JAVA_HOME variable in your environment to match the echo location of your Java installation. goto fail :findJavaFromJavaHome set JAVA_HOME=%JAVA_HOME:"=% set JAVA_EXE=%JAVA_HOME%/bin/java.exe if exist "%JAVA_EXE%" goto init echo. echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% echo. echo Please set the JAVA_HOME variable in your environment to match the echo location of your Java installation. goto fail :init @rem Get command-line arguments, handling Windowz variants if not "%OS%" == "Windows_NT" goto win9xME_args if "%@eval[2+2]" == "4" goto 4NT_args :win9xME_args @rem Slurp the command line arguments. set CMD_LINE_ARGS= set _SKIP=2 :win9xME_args_slurp if "x%~1" == "x" goto execute set CMD_LINE_ARGS=%* goto execute :4NT_args @rem Get arguments from the 4NT Shell from JP Software set CMD_LINE_ARGS=%$ :execute @rem Setup the command line set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar @rem Execute Gradle "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% :end @rem End local scope for the variables with windows NT shell if "%ERRORLEVEL%"=="0" goto mainEnd :fail rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of rem the _cmd.exe /c_ return code! if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 exit /b 1 :mainEnd if "%OS%"=="Windows_NT" endlocal :omega ================================================ FILE: settings.gradle ================================================ include ':app', ':flowlayoutmanager'