Android-four ways to completely exit the current application

The Android program has a lot of activity, such as the main window A, called sub-window B, if the direct finish () in B, then the next show is a. How do I close the entire Android app in B? I have summed up several relatively simple implementation methods.

1. Local methods for Dalvik VMS

Android.os.Process.killProcess (Android.os.Process.myPid ())//Get PID
System.exit (0); Normal Java, C # Standard Exit method with a return value of 0 for graceful exit

2. Task Manager method

The first step is to show that the method runs on Android 1.5 API level 3 to be able, while requiring permissions

Activitymanager am = (activitymanager) getsystemservice (Context.activity_service);
Am.restartpackage (Getpackagename ());
System will, the package under, all processes, services, all killed, you can kill clean, to pay attention to add
<uses-permission android:name=\ "Android.permission.restart_packages\" ></uses-permission>

3. According to the activity's declaration cycle

3. We know that the Android window class provides a history stack, we can use the principle of the stack ingenious implementation, here we in a window open b window in the Intent to join the flag intent.flag_activity_clear_top directly, When you turn on B, all activity for that process space will be cleared.

In the a window, use the following code to invoke the b window

Intent Intent = new Intent ();
Intent.setclass (Android123.this, Cwj.class);
Intent.setflags (Intent.flag_activity_clear_top); Note the flag setting of the bank
StartActivity (Intent);

Next, in the b window you need to exit directly using the Finish method to exit all.

4. Customize a actiivty stack, as above, but use a single-mode activity stack to manage all activity. and provides a way to exit all activity. The code is as follows:

01	publicclassScreenManager {

02	privatestaticStack<Activity> activityStack;

03	privatestaticScreenManager instance;

04	privateScreenManager(){

05

}

06	publicstaticScreenManager getScreenManager(){

07	if(instance==null){

08	instance=newScreenManager();

09

}

10	returninstance;

11

}

12	//退出栈顶Activity

13	publicvoidpopActivity(Activity activity){

14	if(activity!=null){

15	activity.finish();

16	activityStack.remove(activity);

17	activity=null;

18

}

19

}

20

21	//获得当前栈顶Activity

22	publicActivity currentActivity(){

23	Activity activity=activityStack.lastElement();

24	returnactivity;

25

}

26

27	//将当前Activity推入栈中

28	publicvoidpushActivity(Activity activity){

29	if(activityStack==null){

30	activityStack=newStack<Activity>();

31

}

32	activityStack.add(activity);

33

}

34	//退出栈中所有Activity

35	publicvoidpopAllActivityExceptOne(Class cls){

36	while(true){

37	Activity activity=currentActivity();

38	if(activity==null){

39

break;

40

}

41	if(activity.getClass().equals(cls) ){

42

break;

43

}

44	popActivity(activity);

45

}

46

}

47

}

From:http://www.open-open.com/home/space-37924-do-blog-id-5805.html

Android-four ways to completely exit the current application