package com.jsmtr.www.Helper;import java.util.LinkedList;import java.util.List;import android.app.Activity;import android.app.Application;public class ActivityManager extends Application {    @SuppressWarnings("rawtypes")    private List list = new LinkedList();    private static ActivityManager instance;    private ActivityManager () {    }    public synchronized static ActivityManager getInstance() {        if (null == instance) {            instance = new ActivityManager ();        }        return instance;    }    @SuppressWarnings("unchecked")    public void addActivity(Activity activity) {        list.add(activity);    }    public void exit() {        try {            for (int i = 0; i < list.size(); i++) {                Activity activity = (Activity) list.get(i);                if (activity != null)                    activity.finish();            }        } catch (Exception e) {            e.printStackTrace();        } finally {            System.exit(0);        }    }    public void onLowMemory() {        super.onLowMemory();        System.gc();    }}

ActivityManager.getInstance().addActivity(this);

ActivityManager.getInstance().exit();