package com.kingtone.activity;     import android.app.Activity;   import android.content.BroadcastReceiver;   import android.content.Context;   import android.content.Intent;   import android.content.IntentFilter;   /**   * 所有Activity的父类，用来注册退出程序的广播事件，   * 并且对收到的退出程序事件进行处理   * @author Administrator   *   */  public class CommonActivity  extends Activity {              //广播的内部类，当收到关闭事件时，调用finish方法结束activity       private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {           @Override          public void onReceive(Context context, Intent intent) {               finish();           }       };         @Override      public void onResume() {           super.onResume();           //在当前的activity中注册广播           IntentFilter filter = new IntentFilter();           filter.addAction(GlobalVarable.EXIT_ACTION);           this.registerReceiver(this.broadcastReceiver, filter);       }   }  

    @Override    public void onDestroy() {        super.onDestroy();        unregisterReceiver(mLoggedOutReceiver);    }    @Override    public void onResume() {        super.onResume();          }    @Override    public void onPause() {        super.onPause();    }

1. Intentintent=newIntent();
2. intent.setAction(GlobalVarable.EXIT_ACTION);//退出动作
3. this.sendBroadcast(intent);//发送广播
4. super.finish();
5. //退出后台线程,以及销毁静态变量
6. System.exit(0);