How to use the back press to remove the view added by WindowManager?

How to use the back press to remove the view added by WindowManager?

By : Teguh Santosa
Date : November 18 2020, 03:49 PM
this will help guys, I am developing an android AppLock Application, and I use WindowManager to add a gesture lock view. but I have a problem. back key press doesn't remove the view. And I can't rewrite the View to override the dispatchKeyEvent() function, as I use LayoutInflater to inflate my view. Just like that: , Here is a pseudo code that could help.
code :
public class MainActivity extends Activity {
    private MyService mServer;
    ServiceConnection mConnection = new ServiceConnection() {

        public void onServiceDisconnected(ComponentName name) {


        public void onServiceConnected(ComponentName name, IBinder service) {

            LocalBinder mLocalBinder = (LocalBinder) service;
            mServer = mLocalBinder.getServerInstance();

    protected void onCreate(Bundle savedInstanceState) {
        Intent intent = new Intent(MainActivity.this, MyService.class);
        bindService(intent, mConnection, BIND_AUTO_CREATE);

    public void onBackPressed() {
        catch(IllegalArgumentException e){



public class MyService extends Service {

    Thread thread;
    WindowManager windowsManager = null;
    WindowManager.LayoutParams params;
    View view;

    IBinder mBinder = new LocalBinder();

    public IBinder onBind(Intent intent) {
        return mBinder;

    public class LocalBinder extends Binder {
        public MyService getServerInstance() {
            return MyService.this;

    public void onCreate() {
        new Handler().postDelayed(new Runnable() {

            public void run() {

        }, 5000);

    public void onDestroy() {

    private void showView() {
        params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.FLAG_FULLSCREEN | 
        params.gravity = (Gravity.CENTER);
        LayoutInflater layoutInflater = 
                (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = layoutInflater.inflate(R.layout.view_service, null);
        if(windowsManager == null) {
            windowsManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
        if(windowsManager != null && view != null) {
            Message message = addViewHandler.obtainMessage(1);


    Handler addViewHandler = new Handler() {

        public void handleMessage(Message message) {
            int flag = message.what;
            if(flag == 1) {
                windowsManager.addView(view, params);
            } else if(flag == 0) {
    public void removeWindow(){


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How to capture keypress in View added by WindowManager

How to capture keypress in View added by WindowManager

By : Josh Green
Date : March 29 2020, 07:55 AM
hop of those help? Views, which added by windows manager not receive onKey event due to android safety politics.
add View by using WindowManager, but can back key press

add View by using WindowManager, but can back key press

By : Очкарик Чмокнутый
Date : March 29 2020, 07:55 AM
Any of those help I've add a View, by using WindowManager. , Have your View override
code :
public boolean dispatchKeyEvent(KeyEvent event) 
In windowManager only the last added View can click or do other operators

In windowManager only the last added View can click or do other operators

By : user3812714
Date : March 29 2020, 07:55 AM
To fix this issue I solve my problem. add flag'WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE' to WindowManager.LayoutParams in every view,and then all view will be worked~
Is possible remove an overlay with WindowManager when press back or home button in android?

Is possible remove an overlay with WindowManager when press back or home button in android?

By : vkate
Date : March 29 2020, 07:55 AM
seems to work fine Simply you need to set the windowmanager type to APPLICATION, this way the windowmanager will attach views while the application is opened only, and no need to overlay home or back buttons, check docs here
code :
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
Animate view added on WindowManager

Animate view added on WindowManager

By : gh426
Date : March 29 2020, 07:55 AM
help you fix your problem You should animate the view LayoutParameters. For example I use a method to update the view layout:
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