可以通过一个列表来维护所有的activity,在需要退出的时候,销毁列表中的所有活动
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<Activity> mList = new LinkedList<Activity>(); 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); } } @Override public void onLowMemory() { super.onLowMemory(); System.gc(); } }
在每个Activity的onCreate方法中添加类似代码:
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); SysApplication.getInstance().addActivity(this); }
在需要退出程序的时候,调用:
SysApplication.getInstance().exit();