Android(安卓)退出整个程序代码

今天在网上看见个博客关于退出整个程序的，感觉不错，拿来分享学习

SysApplication这个类复制到工程里面，然后在每个Acitivity的oncreate方法里面通过SysApplication.getInstance().addActivity(this); 添加当前Acitivity到ancivitylist里面去，最后在想退出的时候调用SysApplication.getInstance().exit();可直接关闭所有的Acitivity并退出应用程序。

import java.util.LinkedList; import java.util.List; import android.app.Activity; import android.app.AlertDialog; import android.app.Application; import android.content.DialogInterface; import android.content.Intent; public class SysApplication extends Application {     private List mList = new LinkedList();     private static SysApplication instance;     private SysApplication() {        }     public synchronized static SysApplication getInstance() {         if (null == instance) {             instance = new SysApplication();         }         return instance;     }     // add Activity       public void addActivity(Activity activity) {         mList.add(activity);     }     public void exit() {         try {             for (Activity activity : mList) {                 if (activity != null)                     activity.finish();             }         } catch (Exception e) {             e.printStackTrace();         } finally {             System.exit(0);         }     }     public void onLowMemory() {         super.onLowMemory();              System.gc();     }   }

在应用程序里面的activity的oncreate里面添加SysApplication.getInstance().addActivity(this)
如：

public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); SysApplication.getInstance().addActivity(this); }

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