Android利用Logcat监听应用程序本身被卸载

分类： Android 2013-08-28 15:31  318人阅读  评论(0)  收藏  举报

MainActivity如下:

 package cc.testremoveapp;

 import android.os.Bundle;
 import android.app.Activity;
 import android.content.Intent;
 /**
  * Demo描述:
  * 监听应用程序本身被卸载
  *
  * 注意权限:
  * <uses-permission android:name="android.permission.READ_LOGS"></uses-permission>
  *
  * 参考资料:
  * http://blog.csdn.net/xyz_lmn/article/details/8330710
  * Thank you very much
  */
 public class MainActivity extends Activity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         init();
     }
     //启动服务
     private void init(){
         Intent intent=new Intent(this, LogcatScannerService.class);
         startService(intent);
     }


 }

LogcatObserverInterface如下:

 package cc.testremoveapp;
 //业务接口
 public interface LogcatObserverInterface {
     public void handleLog(String logcatInfo);
 }

LogcatScannerService如下:

 package cc.testremoveapp;

 import android.app.Service;
 import android.content.Intent;
 import android.os.IBinder;

 public class LogcatScannerService extends Service implements LogcatObserverInterface {
     @Override
     public void onCreate() {
         super.onCreate();
     }

     @Override
     public void onStart(Intent intent, int startId) {
         super.onStart(intent, startId);
         LogcatScannerThread logcatScannerThread=new LogcatScannerThread(this);
         logcatScannerThread.start();
     }

     @Override
     public IBinder onBind(Intent arg0) {
         return null;
     }

     @Override
     public void onDestroy() {
         super.onDestroy();
     }

     /**
      * 实现LogcatObserverInterface接口中的方法
      */
     @Override
     public void handleLog(String logcatInfo) {
         if (logcatInfo.contains("android.intent.action.DELETE")&& logcatInfo.contains(getPackageName())) {
             /**
              * 注意事项:
              * LogCat有时会多次甚至一直输出卸载应用的信息
              * 所以在实际项目中需要对此处留意处理
              */
             Intent intent = new Intent(LogcatScannerService.this,UninstallActivity.class);
             intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
             startActivity(intent);
         }
     }

 }

LogcatScannerThread如下：

 package cc.testremoveapp;
 import java.io.DataInputStream;
 import java.io.InputStream;

 public class LogcatScannerThread extends Thread {

     private LogcatObserverInterface mLogcatObserverInterface;

     public LogcatScannerThread(LogcatObserverInterface logcatObserverInterface){
         this.mLogcatObserverInterface=logcatObserverInterface;
     }
     @Override
     public void run() {
         super.run();
         int waitValue;
         String line = "";
         String[] cmds = { "logcat", "-c" };
         String shellCMD = "logcat";
         Process process = null;
         InputStream inputStream = null;
         DataInputStream dataInputStream = null;
         Runtime runtime = Runtime.getRuntime();
         try {
                 mLogcatObserverInterface.handleLog(line);
                 waitValue = runtime.exec(cmds).waitFor();
                 mLogcatObserverInterface.handleLog("waitValue=" + waitValue + "\n Has do Clear logcat cache.");
                 process = runtime.exec(shellCMD);
                 inputStream = process.getInputStream();
                 dataInputStream = new DataInputStream(inputStream);
                 while ((line = dataInputStream.readLine()) != null) {
                     if(mLogcatObserverInterface!=null){
                         mLogcatObserverInterface.handleLog(line);
                     }
                 }
         } catch (Exception e) {
                 e.printStackTrace();
         } finally {
             try {
                 if (dataInputStream != null) {
                     dataInputStream.close();
                 }
                 if (inputStream != null) {
                     inputStream.close();
                 }
                 if (process != null) {
                     process.destroy();
                 }
             } catch (Exception e) {
                 e.printStackTrace();
             }
         }
     }

 }

UninstallActivity如下:

 package cc.testremoveapp;

 import android.app.Activity;
 import android.os.Bundle;

 public class UninstallActivity extends Activity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.uninstall);
     }


 }

main.xml如下:

 <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="监听应用本身被卸载"
         android:layout_centerInParent="true"
         />

 </RelativeLayout>

uninstall.xml如下:

 <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="确定卸载本应用?"
         android:layout_centerInParent="true"
         />

 </RelativeLayout>