如何从Android中的另一个应用程序关闭应用程序

Question

I have two android applications. i start activity from App1 and when App2 activity finish i get results in App1 onActivityResult(). Now what i want that if i already open App2 activity and it is not finish yet and if i get some request in App1 to close the App2 activity then i close it without returning any result.

What i did, if i send intenet to "close_activity" signal to App2 activity from App1 like that:

 Log.i(TAG, "stoping app..");
    try {

        Intent intent = mContext.getPackageManager().getLaunchIntentForPackage("com.company.communicationApp");
        intent.setAction("CANCEL_CALL");
         context.startActivity(intent);
    } catch (Exception e) {
        Log.e(TAG, "Unable stop app", e);
    }

I guess only one way to send intenet to a running activity with this way. so this will again start new activity. App2 activity is not a singleTask because if i set it as a singleTask i unable to get results in App1 onActivityResult when App2 activity finish(). Any hint how i can close the current running activity.

-----------------------------With BroadcastReceiver----------------------

in App1 activity sending intent as broadcast:

   try {
        final Intent intent = new Intent();
        intent.setAction("CANCEL_CALL");
        intent.setComponent(new ComponentName("com.hos.hp.talk", "com.hos.hp.talk.MainActivity"));

        mContext.sendBroadcast(intent);
    } catch (Exception e) {
        Log.e(TAG, "Unable stop communication app", e);
    }

in App2 i have register BroadcastReceiver as:

 @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    super.init();

    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction("CANCEL_CALL");
    registerReceiver(receiver, intentFilter);

}
 private BroadcastReceiver receiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        System.out.println("ddd");
    }
};

Answer 1

I think you're looking for the Broadcast Receiver

http://developer.android.com/reference/android/content/BroadcastReceiver.html

Answer 2

This is how i solve this issue. For sending intent:

        Intent intent = new Intent("com.hp.walk.CLOSE_APPLICATION");
    getApplication().sendBroadcast(intent);

in another application this is how i register receiver to get intent:

@Override
public void onCreate(Bundle savedInstanceState) {

    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction("com.hp.walk.CLOSE_APPLICATION");
    registerReceiver(receiver, intentFilter);



 private BroadcastReceiver receiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        if ("com.hp.walk.CLOSE_APPLICATION".equals(intent.getAction())) {
            Log.i(TAG, "received.. ");
            finish();
        }
    }
};