Repository: lzyickobe/UnInstallDemo
Branch: master
Commit: 12ca0e74e339
Files: 14
Total size: 20.0 KB

Directory structure:
gitextract_6sfa6kaj/

├── .gitattributes
├── .gitignore
├── .project
├── AndroidManifest.xml
├── README.md
├── jni/
│   ├── Android.mk
│   └── UninstalledObserver.c
├── libs/
│   └── android-support-v4.jar
├── proguard-project.txt
├── project.properties
├── res/
│   ├── layout/
│   │   └── activity_main.xml
│   └── values/
│       ├── dimens.xml
│       └── strings.xml
└── src/
    └── com/
        └── lzyblog/
            └── uninstalldemo/
                └── UninstalledObserverActivity.java

================================================
FILE CONTENTS
================================================

================================================
FILE: .gitattributes
================================================
# Auto detect text files and perform LF normalization
* text=auto

# Custom for Visual Studio
*.cs     diff=csharp
*.sln    merge=union
*.csproj merge=union
*.vbproj merge=union
*.fsproj merge=union
*.dbproj merge=union

# Standard to msysgit
*.doc	 diff=astextplain
*.DOC	 diff=astextplain
*.docx diff=astextplain
*.DOCX diff=astextplain
*.dot  diff=astextplain
*.DOT  diff=astextplain
*.pdf  diff=astextplain
*.PDF	 diff=astextplain
*.rtf	 diff=astextplain
*.RTF	 diff=astextplain


================================================
FILE: .gitignore
================================================
# Windows image file caches
Thumbs.db
ehthumbs.db

# Folder config file
Desktop.ini

# Recycle Bin used on file shares
$RECYCLE.BIN/

# Windows Installer files
*.cab
*.msi
*.msm
*.msp

# =========================
# Operating System Files
# =========================

# OSX
# =========================

.DS_Store
.AppleDouble
.LSOverride

# Icon must end with two \r
Icon


# Thumbnails
._*

# Files that might appear on external disk
.Spotlight-V100
.Trashes

# Directories potentially created on remote AFP share
.AppleDB
.AppleDesktop
Network Trash Folder
Temporary Items
.apdisk


================================================
FILE: .project
================================================
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
	<name>UnInstallDemo</name>
	<comment></comment>
	<projects>
	</projects>
	<buildSpec>
		<buildCommand>
			<name>com.android.ide.eclipse.adt.ResourceManagerBuilder</name>
			<arguments>
			</arguments>
		</buildCommand>
		<buildCommand>
			<name>com.android.ide.eclipse.adt.PreCompilerBuilder</name>
			<arguments>
			</arguments>
		</buildCommand>
		<buildCommand>
			<name>org.eclipse.jdt.core.javabuilder</name>
			<arguments>
			</arguments>
		</buildCommand>
		<buildCommand>
			<name>com.android.ide.eclipse.adt.ApkBuilder</name>
			<arguments>
			</arguments>
		</buildCommand>
		<buildCommand>
			<name>org.eclipse.ui.externaltools.ExternalToolBuilder</name>
			<triggers>auto,full,incremental,</triggers>
			<arguments>
				<dictionary>
					<key>LaunchConfigHandle</key>
					<value>&lt;project&gt;/.externalToolBuilders/New_NDK.launch</value>
				</dictionary>
			</arguments>
		</buildCommand>
	</buildSpec>
	<natures>
		<nature>com.android.ide.eclipse.adt.AndroidNature</nature>
		<nature>org.eclipse.jdt.core.javanature</nature>
	</natures>
</projectDescription>


================================================
FILE: AndroidManifest.xml
================================================
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.lzyblog.uninstalldemo"
    android:versionCode="1"
    android:versionName="1.1" >

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".UninstalledObserverActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>

</manifest>

================================================
FILE: README.md
================================================
## Android应用监听自己是否被卸载，卸载后弹出反馈网页

### 在前人的基础上有这些解决方案
1. 监听卸载广播，只能监听到别人卸载。自己被卸载的时候，早就收不到广播了。
2. 监听log。这样听起来很靠谱，能稳定监听到，但是发送操作不靠谱。
3. 监听/data/data/<package name>。当Android卸载应用的时候，会先删除这里的文件。可以轮询监听，可以优化成unix文件监听方式，，这样只用等待文件监听服务的回调。

### 采用了第3种解决办法，并对其进行了优化：
#### 问题：
监听/data/data/<package name>这个目录，还存在以下几个问题：

1. 清除数据、插拔USB线、覆盖安装等操作引起程序误判卸载。
2. 重复监听的问题。
3. 用户将已在Internal SD卡安装好的应用移动到external SD卡，导致监听不正常。

#### 原因：
1. 由于inotify_add_watch(fileDescriptor, path, IN_DELETE)这个函数会监听path目录下所有文件的删除操作导致。
2. 重复调用JNI的init方法
3. 暂时未修复

#### 解决方法：
1. 监听不应该针对整个文件夹，而是某个文件。
2. 重复监听的问题，都可以通过加文件锁来防止

详细方案可参考我的博文：[Android监听自己是否被卸载](http://lzyblog.com/2015/01/09/Android%E5%BA%94%E7%94%A8%E7%9B%91%E5%90%AC%E8%87%AA%E5%B7%B1%E6%98%AF%E5%90%A6%E8%A2%AB%E5%8D%B8%E8%BD%BD%EF%BC%8C%E5%81%9A%E5%8F%8D%E9%A6%88%E7%BB%9F%E8%AE%A1/)

参考自:

https://github.com/sevenler/Uninstall_Statics

http://www.cnblogs.com/zealotrouge/p/3157126.html

http://www.cnblogs.com/zealotrouge/p/3159772.html

http://www.cnblogs.com/zealotrouge/p/3182617.html

================================================
FILE: jni/Android.mk
================================================
# Copyright (C) 2009 The Android Open Source Project
#
# 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.
#
LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := uninstalled_observer
LOCAL_SRC_FILES := UninstalledObserver.c

LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
LOCAL_LDLIBS += -L$(SYSROOT)/usr/lib -llog

include $(BUILD_SHARED_LIBRARY)


================================================
FILE: jni/UninstalledObserver.c
================================================

/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * 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.
 *
 * NOTICE:cļҪĶֱʶ TODO1  TODO2
 */
#include<jni.h>
#include<stdlib.h>
#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<fcntl.h>
#include<sys/inotify.h>
#include<sys/stat.h>

#include<android/log.h>

/* 궨begin */
//0
#define MEM_ZERO(pDest, destSize) memset(pDest, 0, destSize)

//LOG궨
#define LOG_INFO(tag, msg) __android_log_write(ANDROID_LOG_INFO, tag, msg)
#define LOG_DEBUG(tag, msg) __android_log_write(ANDROID_LOG_DEBUG, tag, msg)
#define LOG_WARN(tag, msg) __android_log_write(ANDROID_LOG_WARN, tag, msg)
#define LOG_ERROR(tag, msg) __android_log_write(ANDROID_LOG_ERROR, tag, msg)


/* ȫֱbegin */
static char TAG[] = "UninstalledObserverActivity.init";
static jboolean isCopy = JNI_TRUE;

//--TODO1--------------------ҪijԼapkİ------------------------------------
static const char APP_DIR[] = "/data/data/com.lzyblog.uninstalldemo";
static const char APP_FILES_DIR[] = "/data/data/com.lzyblog.uninstalldemo/files";
static const char APP_OBSERVED_FILE[] = "/data/data/com.lzyblog.uninstalldemo/files/observedFile";
static const char APP_LOCK_FILE[] = "/data/data/com.lzyblog.uninstalldemo/files/lockFile";
/* ȫֱ */

/*-------TODO2-----------------------
 * Class:     ҪijԼapp
 * Method:    init
 * Signature: ()V
 * return: ӽpid
 */
JNIEXPORT int JNICALL Java_com_lzyblog_uninstalldemo_UninstalledObserverActivity_init(JNIEnv *env, jobject obj, jstring userSerial, jstring website)
{
    jstring tag = (*env)->NewStringUTF(env, TAG);
	char* websiteStr=(char*) (*env)->GetStringUTFChars(env, website, NULL);

    LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
            , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "init observer"), &isCopy));

    // forkӽִ̣ѯ
    pid_t pid = fork();
    if (pid < 0)
    {
        LOG_ERROR((*env)->GetStringUTFChars(env, tag, &isCopy)
                , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "fork failed !!!"), &isCopy));

        exit(1);
    }
    else if (pid == 0)
    {
	    LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
	            , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "fork Success !!!"), &isCopy));
        // ļļвڣ
        FILE *p_filesDir = fopen(APP_FILES_DIR, "r");
        if (p_filesDir == NULL)
        {
            int filesDirRet = mkdir(APP_FILES_DIR, S_IRWXU | S_IRWXG | S_IXOTH);
            if (filesDirRet == -1)
            {
                LOG_ERROR((*env)->GetStringUTFChars(env, tag, &isCopy)
                        , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "mkdir failed !!!"), &isCopy));

                exit(1);
            }
            LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
	            , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "mkdir Success !!!"), &isCopy));
        }
        LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
	            , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "app dir is exist !!!"), &isCopy));
        

        // ļڣļ
        FILE *p_observedFile = fopen(APP_OBSERVED_FILE, "r");
        if (p_observedFile == NULL)
        {
         LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
	            , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "the observed file is not existed!!!"), &isCopy));
            p_observedFile = fopen(APP_OBSERVED_FILE, "w");
            if (p_observedFile == NULL) {
            LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
	            , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "the observed file create falied!!!"), &isCopy));
            }
            
        }
        fclose(p_observedFile);

        // ļͨ״ֻ̬֤һжؼ
        int lockFileDescriptor = open(APP_LOCK_FILE, O_RDONLY);
        if (lockFileDescriptor == -1)
        {
            lockFileDescriptor = open(APP_LOCK_FILE, O_CREAT);
        }
        int lockRet = flock(lockFileDescriptor, LOCK_EX | LOCK_NB);
        if (lockRet == -1)
        {
            LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
                    , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "observed by another process"), &isCopy));

            exit(0);
        }
        LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
                    , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "observed by child process"), &isCopy));

        // ռ䣬Աȡevent
        void *p_buf = malloc(sizeof(struct inotify_event));
        if (p_buf == NULL)
        {
            LOG_ERROR((*env)->GetStringUTFChars(env, tag, &isCopy)
                    , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "malloc failed !!!"), &isCopy));

            exit(1);
        }
        // ռ䣬Աӡmask
        int maskStrLength = 7 + 10 + 1;// mask=0xռ7ֽڣ32λΪ10λתΪַռ10ֽڣ'\0'ռ1ֽ
        char *p_maskStr = malloc(maskStrLength);
        if (p_maskStr == NULL)
        {
            free(p_buf);

            LOG_ERROR((*env)->GetStringUTFChars(env, tag, &isCopy)
                    , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "malloc failed !!!"), &isCopy));

            exit(1);
        }

        // ʼ
        LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
                , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "start observe"), &isCopy));

        // ʼ
        int fileDescriptor = inotify_init();
        if (fileDescriptor < 0)
        {
            free(p_buf);
            free(p_maskStr);

            LOG_ERROR((*env)->GetStringUTFChars(env, tag, &isCopy)
                    , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "inotify_init failed !!!"), &isCopy));

            exit(1);
        }

        // ӱļб
        int watchDescriptor = inotify_add_watch(fileDescriptor, APP_OBSERVED_FILE, IN_ALL_EVENTS);
        if (watchDescriptor < 0)
        {
            free(p_buf);
            free(p_maskStr);

            LOG_ERROR((*env)->GetStringUTFChars(env, tag, &isCopy)
                    , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "inotify_add_watch failed !!!"), &isCopy));

            exit(1);
        }

        while(1)
        {
            // read
            size_t readBytes = read(fileDescriptor, p_buf, sizeof(struct inotify_event));

            // ӡmask
            snprintf(p_maskStr, maskStrLength, "mask=0x%x\0", ((struct inotify_event *) p_buf)->mask);
            LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
                    , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, p_maskStr), &isCopy));

            if (IN_DELETE_SELF == ((struct inotify_event *) p_buf)->mask)
            {
            	LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
                    , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "the observer file is deleted"), &isCopy));
                
                 inotify_rm_watch(fileDescriptor, watchDescriptor);
                 break;
                 
                //ʵжģȷĸжأĸݣ
                
                /*
                FILE *p_appDir = fopen(APP_DIR, "r");
                // ȷж
                if (p_appDir == NULL)
                {
	                LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
	                    , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "app is uninstall"), &isCopy));
                    inotify_rm_watch(fileDescriptor, watchDescriptor);

                    break;
                }
                // δжأûִ""
                else
                {
	                LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
	                    , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "app not uninstall , the data is empty"), &isCopy));
	                    fclose(p_appDir);
	
	                    // ´ļ¼
	                    FILE *p_observedFile = fopen(APP_OBSERVED_FILE, "w");
	                    fclose(p_observedFile);
	
	                    int watchDescriptor = inotify_add_watch(fileDescriptor, APP_OBSERVED_FILE, IN_ALL_EVENTS);
	                    if (watchDescriptor < 0)
	                    {
	                        free(p_buf);
	                        free(p_maskStr);
	
	                        LOG_ERROR((*env)->GetStringUTFChars(env, tag, &isCopy)
	                                , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "inotify_add_watch failed !!!"), &isCopy));
	
	                        exit(1);
                    	}
                }
                */
            }
        }

        // ͷԴ
        free(p_buf);
        free(p_maskStr);

        // ֹͣ
        LOG_DEBUG((*env)->GetStringUTFChars(env, tag, &isCopy)
                , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "stop observe"), &isCopy));

        if (userSerial == NULL)
        {
            // ִam start -a android.intent.action.VIEW -d $(url)
            execlp("am", "am", "start", "-a", "android.intent.action.VIEW", "-d", websiteStr, (char *)NULL);
        }
        else
        {
            // ִam start --user userSerial -a android.intent.action.VIEW -d $(url)
            execlp("am", "am", "start", "--user", (*env)->GetStringUTFChars(env, userSerial, &isCopy), "-a", "android.intent.action.VIEW", "-d", websiteStr, (char *)NULL);
        }

        // ִʧlog
        LOG_ERROR((*env)->GetStringUTFChars(env, tag, &isCopy)
                , (*env)->GetStringUTFChars(env, (*env)->NewStringUTF(env, "exec AM command failed !!!"), &isCopy));
		(*env)->ReleaseStringUTFChars(env, website, websiteStr);
    }
    else
    {
        // ֱ˳ʹӽ̱initԱӽ̽ͬʱӽpid
		(*env)->ReleaseStringUTFChars(env, website, websiteStr);
        return pid;
    }
}

================================================
FILE: proguard-project.txt
================================================
# To enable ProGuard in your project, edit project.properties
# to define the proguard.config property as described in that file.
#
# Add project specific ProGuard rules here.
# By default, the flags in this file are appended to flags specified
# in ${sdk.dir}/tools/proguard/proguard-android.txt
# You can edit the include path and order by changing the ProGuard
# include property in project.properties.
#
# 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: project.properties
================================================
# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system edit
# "ant.properties", and override values to adapt the script to your
# project structure.
#
# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
#proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt

# Project target.
target=android-19


================================================
FILE: res/layout/activity_main.xml
================================================
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</RelativeLayout>

================================================
FILE: res/values/dimens.xml
================================================
<resources>

    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>

</resources>


================================================
FILE: res/values/strings.xml
================================================
<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">UnInstallDemo</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>

</resources>


================================================
FILE: src/com/lzyblog/uninstalldemo/UninstalledObserverActivity.java
================================================
package com.lzyblog.uninstalldemo;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import android.app.Activity;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;

/**
 * @author liuzhiyong תpengyiming
 * @note ӦǷжأж򵯳жط
 * @note API17û֧֣ԭ4.2߰汾ִʱȱuserSerialش޸
 * @note ˴δ޸ᵽһЩbugݡUSBߡǰװȲжء
 * @note κظ⣬ͨļֹpsȡؽ˽ķҪúܶࡣ
 * @note װSDжؼȻû⣬ûInternal SDװõӦƶexternal
 *       SD.c161δfilesļкļӦûbug붼УҪ޸bugɡ
 * @note ͵ַ:http://lzyblog.com
 */

public class UninstalledObserverActivity extends Activity {
	/* ݶbegin */
	private static final String TAG = "UninstalledObserverActivity";
	
	//վ
	private static final String WEBSITE = "http://lzyblog.com";

	// pid
	private int mObserverProcessPid = -1;

	/* ݶend */

	/* static */
	// ʼ
	private native int init(String userSerial, String webSite);

	static {
		Log.d(TAG, "load lib --> uninstalled_observer");
		System.loadLibrary("uninstalled_observer");
	}

	/* static */

	/* begin */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		createFile();
		
		
		// API levelС17ҪȡuserSerialNumber
		if (Build.VERSION.SDK_INT < 17) {
			mObserverProcessPid = init(null, WEBSITE);
		}
		// ҪȡuserSerialNumber
		else {
			mObserverProcessPid = init(getUserSerial(), WEBSITE);
		}
	}

	private void createFile() {
		File file = new File("/data/data/com.lzyblog.uninstalldemo/files/observedFile");
		if (!file.exists()) {
			try {
				File dir = new File("/data/data/com.lzyblog.uninstalldemo/files");
				if (!dir.exists()) {
					if (dir.mkdir()) {
						Log.e(TAG, "filesĿ¼ɹ");
					} else {
						Log.e(TAG, "filesĿ¼ʧ");
						return;
					}
				}
				if (file.createNewFile()) {
					Log.e(TAG, "observedFileɹ");
					return;
				}
				Log.e(TAG, "observedFileʧ");
			} catch (IOException e) {
				e.printStackTrace();
				Log.e(TAG, "observedFileʧ");
			}
		} else {
			Log.e(TAG, "observedFile");
		}
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();

		// ʾ룬ڽ
		// if (mObserverProcessPid > 0)
		// {
		// android.os.Process.killProcess(mObserverProcessPid);
		// }
	}

	// targetSdkVersion17ֻͨȡ
	private String getUserSerial() {
		Object userManager = getSystemService("user");
		if (userManager == null) {
			Log.e(TAG, "userManager not exsit !!!");
			return null;
		}

		try {
			Method myUserHandleMethod = android.os.Process.class.getMethod(
					"myUserHandle", (Class<?>[]) null);
			Object myUserHandle = myUserHandleMethod.invoke(
					android.os.Process.class, (Object[]) null);

			Method getSerialNumberForUser = userManager.getClass().getMethod(
					"getSerialNumberForUser", myUserHandle.getClass());
			long userSerial = (Long) getSerialNumberForUser.invoke(userManager,
					myUserHandle);
			return String.valueOf(userSerial);
		} catch (NoSuchMethodException e) {
			Log.e(TAG, "", e);
		} catch (IllegalArgumentException e) {
			Log.e(TAG, "", e);
		} catch (IllegalAccessException e) {
			Log.e(TAG, "", e);
		} catch (InvocationTargetException e) {
			Log.e(TAG, "", e);
		}

		return null;
	}
	/* end */
}