how to disable the recent apps button in Android Lollipop

Question

In my app i want to disable the recent apps button.

(ie)When user press that button it doesn't show the recent running apps and reside on the same activity page.

I did that by following code. But it doesn't work in Android L.

@Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);

        if (!hasFocus) {
            windowCloseHandler.postDelayed(windowCloserRunnable, 250);

        }
    }

    private void toggleRecents() {
        Intent closeRecents = new Intent("com.android.systemui.recent.action.TOGGLE_RECENTS");
        closeRecents.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
        ComponentName recents = new ComponentName("com.android.systemui", "com.android.systemui.recent.RecentsActivity");
        closeRecents.setComponent(recents);
        this.startActivity(closeRecents);
        Toast.makeText(getApplicationContext(), "Complete the test and go back", Toast.LENGTH_LONG).show();
    }

    private Handler windowCloseHandler = new Handler();
    private Runnable windowCloserRunnable = new Runnable() {
        @Override
        public void run() {
ActivityManager am = (ActivityManager)getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);
            ComponentName cn = am.getRunningTasks(1).get(0).topActivity;



            if (cn != null && cn.getClassName().equals("com.android.systemui.recent.RecentsActivity")) {
                toggleRecents();
            }
        }
    };

Please help to solve this issue in Android Lollipop.

Answer 1

you can use the code below. but the problem is though, after someone click on recent app button, the action call after a second and if he/she quickly clear the app from the list, your app is lost.

 @Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    if (!hasFocus) {
        // Close every kind of system dialog
        Intent closeDialog = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
        sendBroadcast(closeDialog);
    }
}

Cheers!