android 彻底关闭应用程序

Android让App彻底退出的实现方法。

1)先在AndroidManifest.xml文件中添加<uses-permission android:name="android.permission.RESTART_PACKAGES" />
2)然后在自己的Activity重写onKeyDown()方法。具体实现如下：

 @Override
 public boolean onKeyDown(int keyCode, KeyEvent event) {
 if(keyCode==KeyEvent.KEYCODE_BACK&&event.getRepeatCount()==0){
             AlertDialog.Builder alertbBuilder=new AlertDialog.Builder(this);
             alertbBuilder.setTitle("真的要离开？").setMessage("你确定要离开？").setPositiveButton("确定", new DialogInterface.OnClickListener() {
                     @Override
                     public void onClick(DialogInterface dialog, int which) {
                             //结束这个Activity
                     int nPid = android.os.Process.myPid();
                     android.os.Process.killProcess(nPid);
                     }
             }).setNegativeButton("取消", new DialogInterface.OnClickListener() {

                     @Override
                     public void onClick(DialogInterface dialog, int which) {
                             dialog.cancel();
                     }
             }).create();
             alertbBuilder.show();
     }
     return true;
 }

http://blog.csdn.net/m_changgong/article/details/6791495