Summary of several methods of Android exit program

The following is a summary of several ways to exit the program in Android, the need for friends can come to refer to the next

The Android program has a lot of activity, such as the main window A, which calls the Sub window B, and if you finish directly in B (), then it shows a. How do you close the entire Android application in B? I have summed up several relatively simple implementation methods.
1. Local method of Dalvik VM

Copy Code code as follows:


android.os.Process.killProcess (Android.os.Process.myPid ())//Get PID


system.exit (0); Normal Java, C # Standard Exit method, the return value of 0 represents a graceful exit

2. Task Manager method
The first thing to say is that the method runs at more than 3 of the Android 1.5 API level, and requires permissions

Copy Code code as follows:


Activitymanager am = (activitymanager) getsystemservice (Context.activity_service);


Am.restartpackage (Getpackagename ());

The system will, under the package, all processes, services, all killed, you can kill clean, to note that plus permissions Android.permission.RESTART_PACKAGES

3. According to the statement cycle of the activity
3. We know that the Android window class provides a history stack, and we can do this by using the stack principle, where we add the flag intent.flag_activity_clear_top directly to the Intent when we open the B window in window A. By opening B, all activity in the process space will be cleared.
Use the following code in window A to invoke the b window

Copy Code code as follows:


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 the direct use of the finish method to exit all.

4. Customize a actiivty stack, the same as above, but using a single case mode of the activity stack to manage all activity. and provide a way to quit all activity. The code is as follows:

Copy Code code as follows:


public class Screenmanager {


private static Stack activitystack;


private static Screenmanager instance;


Private Screenmanager () {


}


public static Screenmanager Getscreenmanager () {


instance=new Screenmanager ();


}


return instance;


}


//exit stack top activity


public void popactivity (activity activity) {


Activity.finish ();


Activitystack.remove (activity);


Activity=null;


}


}


//Get current stack top activity


public Activity currentactivity () {


activity activity=activitystack.lastelement ();


return activity;


}


//Push the current activity into the stack


public void pushactivity (activity activity) {


activitystack=new Stack ();


}


Activitystack.add (activity);


}


//Exit all activity in the stack


public void Popallactivityexceptone (Class cls) {


while (true) {


activity activity=currentactivity ();


break;


}


break;


}


popactivity (activity);


}


}


}