Repository: JrDong/FitPopupWindow Branch: master Commit: 8e00e224c8b2 Files: 40 Total size: 54.9 KB Directory structure: gitextract_a2vmsmgr/ ├── .gitignore ├── LICENSE ├── README.md ├── app/ │ ├── .gitignore │ ├── build.gradle │ ├── proguard-rules.pro │ └── src/ │ ├── androidTest/ │ │ └── java/ │ │ └── com/ │ │ └── djr/ │ │ └── fitpopupwindow/ │ │ └── ExampleInstrumentedTest.java │ ├── main/ │ │ ├── AndroidManifest.xml │ │ ├── java/ │ │ │ └── com/ │ │ │ └── djr/ │ │ │ └── fitpopupwindow/ │ │ │ ├── ListAdapter.java │ │ │ ├── ListHolder.java │ │ │ ├── MainActivity.java │ │ │ ├── SecondActivity.java │ │ │ └── utils/ │ │ │ ├── DensityUtils.java │ │ │ ├── FitPopupUtil.java │ │ │ ├── FitPopupWindow.java │ │ │ ├── FitPopupWindowLayout.java │ │ │ └── ScreenUtils.java │ │ └── res/ │ │ ├── anim/ │ │ │ ├── anim_popup_in.xml │ │ │ └── anim_popup_out.xml │ │ ├── drawable/ │ │ │ ├── orange_corners_bg.xml │ │ │ ├── popupwindow_bg.xml │ │ │ ├── selector_popupwindow_text_bg.xml │ │ │ └── selector_popupwindow_text_color.xml │ │ ├── layout/ │ │ │ ├── activity_main.xml │ │ │ ├── activity_second.xml │ │ │ ├── item_list.xml │ │ │ └── layout_popupwindow.xml │ │ ├── values/ │ │ │ ├── colors.xml │ │ │ ├── dimens.xml │ │ │ ├── strings.xml │ │ │ └── styles.xml │ │ └── values-w820dp/ │ │ └── dimens.xml │ └── test/ │ └── java/ │ └── com/ │ └── djr/ │ └── fitpopupwindow/ │ └── ExampleUnitTest.java ├── build.gradle ├── gradle/ │ └── wrapper/ │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradle.properties ├── gradlew ├── gradlew.bat └── settings.gradle ================================================ FILE CONTENTS ================================================ ================================================ FILE: .gitignore ================================================ *.iml .gradle /local.properties .idea .DS_Store /build /captures .externalNativeBuild ================================================ FILE: LICENSE ================================================ Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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See the License for the specific language governing permissions and limitations under the License. ================================================ FILE: README.md ================================================ # FitPopupWindow 根据点击位置自适应弹出位置的PopupWindow,仿网易新闻/今日头条,"不感兴趣"弹框 ## 效果图 ![PopupWindow](/popupwindow.gif) ## 用法 /** * @param anchorView 目标view * */ private void initPopup(View anchorView) { FitPopupUtil fitPopupUtil = new FitPopupUtil(this); fitPopupUtil.setOnClickListener(new FitPopupUtil.OnCommitClickListener() { @Override public void onClick(String reason) { Toast.makeText(MainActivity.this,reason,Toast.LENGTH_SHORT).show(); } }); fitPopupUtil.showPopup(anchorView); } ================================================ FILE: app/.gitignore ================================================ /build ================================================ FILE: app/build.gradle ================================================ apply plugin: 'com.android.application' android { compileSdkVersion 23 buildToolsVersion '24.0.1' defaultConfig { applicationId "com.djr.fitpopupwindow" minSdkVersion 14 targetSdkVersion 23 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' }) compile 'com.android.support:appcompat-v7:23.+' compile 'com.android.support:recyclerview-v7:23.4.0' testCompile 'junit:junit:4.12' } ================================================ FILE: app/proguard-rules.pro ================================================ # Add project specific ProGuard rules here. # By default, the flags in this file are appended to flags specified # in E:\Android\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/djr/fitpopupwindow/ExampleInstrumentedTest.java ================================================ package com.djr.fitpopupwindow; import android.content.Context; import android.support.test.InstrumentationRegistry; import android.support.test.runner.AndroidJUnit4; import org.junit.Test; import org.junit.runner.RunWith; import static org.junit.Assert.*; /** * Instrumentation test, which will execute on an Android device. * * @see Testing documentation */ @RunWith(AndroidJUnit4.class) public class ExampleInstrumentedTest { @Test public void useAppContext() throws Exception { // Context of the app under test. Context appContext = InstrumentationRegistry.getTargetContext(); assertEquals("com.djr.fitpopupwindow", appContext.getPackageName()); } } ================================================ FILE: app/src/main/AndroidManifest.xml ================================================ ================================================ FILE: app/src/main/java/com/djr/fitpopupwindow/ListAdapter.java ================================================ package com.djr.fitpopupwindow; import android.app.Activity; import android.content.Context; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Toast; import com.djr.fitpopupwindow.utils.FitPopupUtil; import java.util.List; /** * Created by DongJr on 2017/2/21. */ public class ListAdapter extends RecyclerView.Adapter { private List mList; private Context mContext; public ListAdapter(Context context, List list) { mContext = context; mList = list; } @Override public ListHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = LayoutInflater.from(mContext) .inflate(R.layout.item_list, parent, false); return new ListHolder(view); } @Override public void onBindViewHolder(ListHolder holder, int position) { holder.ivRemove.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { FitPopupUtil fitPopupUtil = new FitPopupUtil((Activity) mContext); fitPopupUtil.setOnClickListener(new FitPopupUtil.OnCommitClickListener() { @Override public void onClick(String reason) { Toast.makeText(mContext,reason,Toast.LENGTH_SHORT).show(); } }); fitPopupUtil.showPopup(v); } }); } @Override public int getItemCount() { return mList.size(); } } ================================================ FILE: app/src/main/java/com/djr/fitpopupwindow/ListHolder.java ================================================ package com.djr.fitpopupwindow; import android.support.v7.widget.RecyclerView; import android.view.View; import android.widget.ImageView; /** * Created by DongJr on 2017/2/21. */ public class ListHolder extends RecyclerView.ViewHolder { ImageView ivRemove; public ListHolder(View itemView) { super(itemView); ivRemove = (ImageView) itemView.findViewById(R.id.iv_remove); } } ================================================ FILE: app/src/main/java/com/djr/fitpopupwindow/MainActivity.java ================================================ package com.djr.fitpopupwindow; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.LayoutInflater; import android.view.View; import android.widget.Button; import android.widget.Toast; import com.djr.fitpopupwindow.utils.FitPopupUtil; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private LayoutInflater mInflater; private Button button1; private Button button2; private Button button3; private Button button4; private Button button5; private Button button6; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mInflater = LayoutInflater.from(this); button1 = (Button) findViewById(R.id.button1); button2 = (Button) findViewById(R.id.button2); button3 = (Button) findViewById(R.id.button3); button4 = (Button) findViewById(R.id.button4); button5 = (Button) findViewById(R.id.button5); button6 = (Button) findViewById(R.id.button6); button1.setOnClickListener(this); button2.setOnClickListener(this); button3.setOnClickListener(this); button4.setOnClickListener(this); button5.setOnClickListener(this); button6.setOnClickListener(this); } private void initPopup(View anchorView) { FitPopupUtil fitPopupUtil = new FitPopupUtil(this); fitPopupUtil.setOnClickListener(new FitPopupUtil.OnCommitClickListener() { @Override public void onClick(String reason) { Toast.makeText(MainActivity.this,reason,Toast.LENGTH_SHORT).show(); } }); fitPopupUtil.showPopup(anchorView); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.button1: initPopup(button1); break; case R.id.button2: initPopup(button2); break; case R.id.button3: SecondActivity.startActivity(this); break; case R.id.button4: initPopup(button4); break; case R.id.button5: initPopup(button5); break; case R.id.button6: initPopup(button6); default: break; } } } ================================================ FILE: app/src/main/java/com/djr/fitpopupwindow/SecondActivity.java ================================================ package com.djr.fitpopupwindow; import android.content.Context; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import java.util.ArrayList; public class SecondActivity extends AppCompatActivity { private RecyclerView mRecyclerView; public static void startActivity(Context context) { Intent intent = new Intent(context, SecondActivity.class); context.startActivity(intent); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_second); mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView); init(); } private void init() { ArrayList list = new ArrayList<>(); for (int i = 0; i < 20; i++) { list.add(i + ""); } LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this); mRecyclerView.setLayoutManager(linearLayoutManager); ListAdapter listAdapter = new ListAdapter(this, list); mRecyclerView.setAdapter(listAdapter); } } ================================================ FILE: app/src/main/java/com/djr/fitpopupwindow/utils/DensityUtils.java ================================================ package com.djr.fitpopupwindow.utils; import android.content.res.Resources; /** * 单位换算工具类 */ public final class DensityUtils { private DensityUtils() { /** cannot be instantiated **/ throw new UnsupportedOperationException("cannot be instantiated"); } /** * dp转px */ public static int dp2px(float dpVal) { final float scale = Resources.getSystem().getDisplayMetrics().density; return (int) (dpVal * scale + 0.5f); } /** * sp转px */ public static int sp2px(float spVal) { final float fontScale = Resources.getSystem().getDisplayMetrics().scaledDensity; return (int) (spVal * fontScale + 0.5f); } /** * px转dp */ public static float px2dp(float pxVal) { final float scale = Resources.getSystem().getDisplayMetrics().density; return (pxVal / scale); } /** * px转sp */ public static float px2sp(float pxVal) { return (pxVal / Resources.getSystem().getDisplayMetrics().scaledDensity); } } ================================================ FILE: app/src/main/java/com/djr/fitpopupwindow/utils/FitPopupUtil.java ================================================ package com.djr.fitpopupwindow.utils; import android.app.Activity; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import com.djr.fitpopupwindow.R; /** * Created by DongJr on 2017/2/27. */ public class FitPopupUtil implements View.OnClickListener { private View contentView; private Activity context; private TextView reason1; private TextView reason2; private TextView reason3; private TextView btnCommit; private boolean reason1Selected; private boolean reason2Selected; private boolean reason3Selected; private FitPopupWindow mPopupWindow; private OnCommitClickListener listener; public FitPopupUtil(Activity context) { this.context = context; LayoutInflater inflater = LayoutInflater.from(context); contentView = inflater.inflate(R.layout.layout_popupwindow, null); reason1 = (TextView) contentView.findViewById(R.id.tv_reason1); reason2 = (TextView) contentView.findViewById(R.id.tv_reason2); reason3 = (TextView) contentView.findViewById(R.id.tv_reason3); btnCommit = (TextView) contentView.findViewById(R.id.btn_commit); reason1.setOnClickListener(this); reason2.setOnClickListener(this); reason3.setOnClickListener(this); } public void setOnClickListener(OnCommitClickListener listener) { this.listener = listener; } /** * 弹出自适应位置的popupwindow * * @param anchorView 目标view */ public View showPopup(View anchorView) { if (mPopupWindow == null) { mPopupWindow = new FitPopupWindow(context, ScreenUtils.getScreenWidth(context) - DensityUtils.dp2px(20), ViewGroup.LayoutParams.WRAP_CONTENT ); } mPopupWindow.setView(contentView, anchorView); mPopupWindow.show(); return contentView; } @Override public void onClick(View v) { switch (v.getId()) { case R.id.tv_reason1: reason1Selected = !reason1Selected; reason1.setSelected(reason1Selected); break; case R.id.tv_reason2: reason2Selected = !reason2Selected; reason2.setSelected(reason2Selected); break; case R.id.tv_reason3: reason3Selected = !reason3Selected; reason3.setSelected(reason3Selected); break; case R.id.btn_commit: if (listener != null) { listener.onClick(getReason()); } mPopupWindow.dismiss(); break; } if (reason1Selected || reason2Selected || reason3Selected) { btnCommit.setOnClickListener(this); btnCommit.setText("确定"); } else { btnCommit.setOnClickListener(null); btnCommit.setText("不感兴趣"); } } public String getReason() { String content1 = reason1Selected ? reason1.getText().toString() + "," : ""; String content2 = reason2Selected ? reason2.getText().toString() + "," : ""; String content3 = reason3Selected ? reason3.getText().toString() + "," : ""; String s = content1 + content2 + content3; return s.substring(0, s.length() - 1); } public interface OnCommitClickListener { void onClick(String reason); } } ================================================ FILE: app/src/main/java/com/djr/fitpopupwindow/utils/FitPopupWindow.java ================================================ package com.djr.fitpopupwindow.utils; import android.app.Activity; import android.graphics.drawable.ColorDrawable; import android.support.v4.view.animation.FastOutSlowInInterpolator; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.view.WindowManager; import android.view.animation.AlphaAnimation; import android.view.animation.Animation; import android.view.animation.AnimationSet; import android.view.animation.ScaleAnimation; import android.widget.PopupWindow; import android.widget.RelativeLayout; import com.djr.fitpopupwindow.R; /** * Created by DongJr on 2017/2/21. */ public class FitPopupWindow extends PopupWindow implements PopupWindow.OnDismissListener { private View anchorView; private Activity context; private int mWindowWidth; private static final int PADDING = 0; //x轴坐标 private int mXCoordinate; private int mHorizontal; private int mVertical; private int[] windowPos; private FitPopupWindowLayout mFitPopupWindowLayout; public FitPopupWindow(Activity context) { init(context, ViewGroup.LayoutParams.WRAP_CONTENT , ViewGroup.LayoutParams.WRAP_CONTENT); } public FitPopupWindow(Activity context, int width, int height) { mWindowWidth = width; init(context, width, height); } private void init(Activity context, int width, int height) { this.context = context; //popupwindow会默认忽略最外层的大小,所以应该再嵌套一层 setWidth(width); setHeight(height); setBackgroundDrawable(new ColorDrawable(0x00000000)); setOutsideTouchable(true); setFocusable(true); setOnDismissListener(this); setAnimationStyle(R.style.popp_anim); } public void setView(View contentView, View anchorView) { this.anchorView = anchorView; windowPos = calculatePopWindowPos(anchorView, contentView); mFitPopupWindowLayout = new FitPopupWindowLayout(context); RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT, getHeight() - FitPopupWindowLayout.SHARP_HEIGHT); layoutParams.bottomMargin = FitPopupWindowLayout.SHARP_HEIGHT; contentView.setLayoutParams(layoutParams); mFitPopupWindowLayout.setOrientation(getHorizontal(), getVertical() , getXCoordinate()); mFitPopupWindowLayout.addView(contentView); setContentView(mFitPopupWindowLayout); } public void show() { showAtLocation(anchorView, Gravity.TOP | Gravity.END , windowPos[0], windowPos[1]); update(); Window window = context.getWindow(); WindowManager.LayoutParams lp = window.getAttributes(); lp.alpha = 0.7f; window.setAttributes(lp); } /** * @param anchorView 弹出window的view * @param contentView window的内容布局 * @return window显示的左上角的xOff, yOff坐标 */ protected int[] calculatePopWindowPos(final View anchorView, final View contentView) { final int windowPos[] = new int[2]; final int anchorLoc[] = new int[2]; // 获取锚点View在屏幕上的左上角坐标位置 anchorView.getLocationOnScreen(anchorLoc); final int anchorHeight = anchorView.getHeight(); final int anchorWidth = anchorView.getWidth(); mXCoordinate = anchorLoc[0]; // 获取屏幕的高宽 final int screenHeight = ScreenUtils.getScreenHeight(anchorView.getContext()); final int screenWidth = ScreenUtils.getScreenWidth(anchorView.getContext()); contentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED); // 计算contentView的高宽 int windowHeight = contentView.getMeasuredHeight(); mWindowWidth = mWindowWidth > 0 ? mWindowWidth : contentView.getMeasuredWidth(); // 判断需要向上弹出还是向下弹出,如果要改变弹出策略,改变此处即可 // 目前是根据屏幕的一半进行判断 final boolean isNeedShowUp = (screenHeight - anchorLoc[1] - anchorHeight < screenHeight / 2); // 判断需要向左弹出还是向右弹出 final boolean isNeedShowLeft = (anchorLoc[0] < mWindowWidth / 2); setHorizontal(isNeedShowLeft ? FitPopupWindowLayout.LEFT : FitPopupWindowLayout.RIGHT); setVertical(isNeedShowUp ? FitPopupWindowLayout.UP : FitPopupWindowLayout.DOWN); // windowPos[0] = isNeedShowLeft ? // anchorLoc[0] - windowWidth : anchorLoc[0] + anchorWidth; windowPos[0] = (screenWidth - mWindowWidth) / 2; windowPos[1] = isNeedShowUp ? anchorLoc[1] - windowHeight - PADDING - FitPopupWindowLayout.SHARP_HEIGHT : anchorLoc[1] + anchorHeight + PADDING; return windowPos; } @Override public void dismiss() { super.dismiss(); } @Override public void onDismiss() { WindowManager.LayoutParams lp = context.getWindow().getAttributes(); lp.alpha = 1f; context.getWindow().setAttributes(lp); } public int getXCoordinate() { if (mXCoordinate > mWindowWidth / 2) { mXCoordinate = mWindowWidth - mXCoordinate - anchorView.getWidth() + 50; } return mXCoordinate; } private int getHorizontal() { return mHorizontal; } /** * @param mHorizontal 设置水平方向 */ private void setHorizontal(int mHorizontal) { this.mHorizontal = mHorizontal; } private int getVertical() { return mVertical; } /** * @param mVertical 设置竖直方向 */ private void setVertical(int mVertical) { this.mVertical = mVertical; } private void startAnimation(boolean isStart) { AnimationSet animationSet = new AnimationSet(true); ScaleAnimation sa; sa = new ScaleAnimation(0, 1f, 0, 1f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); sa.setDuration(150); sa.setInterpolator(new FastOutSlowInInterpolator()); sa.setFillAfter(true); AlphaAnimation aa = new AlphaAnimation(0f, 1f); aa.setDuration(150); aa.setFillAfter(true); animationSet.addAnimation(sa); animationSet.addAnimation(aa); mFitPopupWindowLayout.startAnimation(animationSet); } } ================================================ FILE: app/src/main/java/com/djr/fitpopupwindow/utils/FitPopupWindowLayout.java ================================================ package com.djr.fitpopupwindow.utils; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.RectF; import android.util.AttributeSet; import android.widget.RelativeLayout; /** * Created by DongJr on 2017/2/21. *

* 气泡 */ public class FitPopupWindowLayout extends RelativeLayout { public static final int UP = 1; public static final int RIGHT = 2; public static final int LEFT = 3; public static final int DOWN = 4; private int mHorizontal = LEFT; private int mVertical = DOWN; private Paint mPaint; public static final int SHARP_WIDTH = 50; public static final int SHARP_HEIGHT = (int) (SHARP_WIDTH * 1.0f); private static final int RECT_CORNER = 20; private int mXoffset = 20; private Path mPath = new Path(); private Path mSharpPath = new Path(); public FitPopupWindowLayout(Context context) { this(context, null); } public FitPopupWindowLayout(Context context, AttributeSet attrs) { this(context, attrs, 0); } public FitPopupWindowLayout(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); setBackgroundColor(Color.TRANSPARENT); mPaint = new Paint(); mPaint.setColor(Color.WHITE); mPaint.setStyle(Paint.Style.FILL); mPaint.setAntiAlias(true); } private Path makeSharpPath() { mSharpPath.moveTo(mXoffset, getMeasuredHeight() - SHARP_HEIGHT); mSharpPath.cubicTo(mXoffset, getMeasuredHeight(), mXoffset, getMeasuredHeight() - SHARP_HEIGHT, SHARP_WIDTH + mXoffset, getMeasuredHeight() - SHARP_HEIGHT); return mSharpPath; } @Override protected void onDraw(Canvas canvas) { mPath.addRoundRect(new RectF(0, 0, getMeasuredWidth(), getMeasuredHeight() - SHARP_HEIGHT) , RECT_CORNER, RECT_CORNER, Path.Direction.CW); mPath.addPath(makeSharpPath()); canvas.drawPath(mPath, mPaint); if (mHorizontal == LEFT && mVertical == UP) { setScaleX(1); setScaleY(1); } else if (mHorizontal == LEFT && mVertical == DOWN) { setScaleX(1); setScaleY(-1); scaleChild(1, -1); } else if (mHorizontal == RIGHT && mVertical == UP) { setScaleX(-1); setScaleY(1); scaleChild(-1, 1); } else if (mHorizontal == RIGHT && mVertical == DOWN) { setScaleX(-1); setScaleY(-1); scaleChild(-1, -1); } } private void scaleChild(float scaleX, float scaleY) { for (int i = 0; i < getChildCount(); i++) { getChildAt(i).setScaleX(scaleX); getChildAt(i).setScaleY(scaleY); } } public void setOrientation(int horizontal, int vertical, int xOffset) { mHorizontal = horizontal; mVertical = vertical; mXoffset = xOffset; invalidate(); } } ================================================ FILE: app/src/main/java/com/djr/fitpopupwindow/utils/ScreenUtils.java ================================================ package com.djr.fitpopupwindow.utils; import android.content.Context; /** * Created by DongJr on 2017/2/21. */ public class ScreenUtils { private ScreenUtils() { } public static int getScreenHeight(Context context) { return context.getResources().getDisplayMetrics().heightPixels; } public static int getScreenWidth(Context context) { return context.getResources().getDisplayMetrics().widthPixels; } } ================================================ FILE: app/src/main/res/anim/anim_popup_in.xml ================================================ ================================================ FILE: app/src/main/res/anim/anim_popup_out.xml ================================================ ================================================ FILE: app/src/main/res/drawable/orange_corners_bg.xml ================================================ ================================================ FILE: app/src/main/res/drawable/popupwindow_bg.xml ================================================ ================================================ FILE: app/src/main/res/drawable/selector_popupwindow_text_bg.xml ================================================ ================================================ FILE: app/src/main/res/drawable/selector_popupwindow_text_color.xml ================================================ ================================================ FILE: app/src/main/res/layout/activity_main.xml ================================================