Four ways Android completely exits the current application _android

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
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, you should pay attention to add
<uses-permission android:name=\ "Android.permission.restart_packages\" ></uses-permission>

3. According to the statement cycle of the activity

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:

public class Screenmanager {private static stack<activity> activitystack;
 private static Screenmanager instance; Private Screenmanager () {} public static Screenmanager Getscreenmanager () {if (instance==null) {instance=new Screenman
 Ager ();
 return instance;
  }//exit stack top activity public void popactivity (activity activity) {if (activity!=null) {activity.finish ();
  Activitystack.remove (activity);
 Activity=null;
 }///get current stack top activity currentactivity () {activity activity=activitystack.lastelement ();
 return activity; ///Push the current activity into the stack public void pushactivity (active activity) {if (activitystack==null) {activitystack=new stack<
 Activity> ();
 } activitystack.add (activity);
  //Exits all activity in the stack public void Popallactivityexceptone (Class cls) {while (true) {The Activity activity=currentactivity ();
  if (activity==null) {break;
  } if (Activity.getclass (). Equals (CLS)) {break;
 } popactivity (activity); }
 }
}