How to Add Window Android.View.Viewroot$W@44Da9Bc0 -- Permission Denied for This Window Type

Unable to add window android.view.ViewRoot$W@44da9bc0 -- permission denied for this window type

Try using this permission in AndroidManifest.

android.permission.SYSTEM_ALERT_WINDOW

on API >= 23 see

Android: Unable to add window. Permission denied for this window type

For what should be completely obvious reasons, ordinary Apps are not allowed to create arbitrary windows on top of the lock screen. What do you think I could do if I created a window on your lockscreen that could perfectly imitate the real lockscreen so you couldn't tell the difference?

The technical reason for your error is the use of the TYPE_KEYGUARD_DIALOG flag - it requires android.permission.INTERNAL_SYSTEM_WINDOW which is a signature-level permission. This means that only Apps signed with the same certificate as the creator of the permission can use it.

The creator of android.permission.INTERNAL_SYSTEM_WINDOW is the Android system itself, so unless your App is part of the OS, you don't stand a chance.

There are well defined and well documented ways of notifying the user of information from the lockscreen. You can create customised notifications which show on the lockscreen and the user can interact with them.

Unable to add window -- permission denied for this window type

This question has been solved by myself

UPDATE

make sure you have added permission in the manifest.

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

put this on onCreate or whatever you want to askPermission()

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && !Settings.canDrawOverlays(this)) {
   askPermission()
}

Method:

@TargetApi(23)
public void askPermission() {
    Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
            Uri.parse("package:" + getPackageName()));
    startActivityForResult(intent, SYSTEM_ALERT_WINDOW_PERMISSION);
}

Permission denied for window type 2002 in Android Studio

This is occurring because the targetSdkVersion in the example and your targetSdkVersion are different. Use the flag TYPE_APPLICATION_OVERLAY instead of TYPE_PHONE in WindowManager.LayoutParams:

WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY

Unable to add window - windowmanager permission denied for this window type 2003 or 2006

I've solved the problem. We need some permissions when working with Android M and above. You can fix this problem with "draw over other apps" permission.

Add to manifest

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

WindowManager

    windowManager = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
    surfaceView = new SurfaceView(this);
    ViewGroup.LayoutParams layoutParams = new WindowManager.LayoutParams(1, 1,
            Build.VERSION.SDK_INT < Build.VERSION_CODES.O ?
                    WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY :
                    WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
            WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
            PixelFormat.TRANSLUCENT);
    windowManager.addView(surfaceView, layoutParams);
    surfaceView.getHolder().addCallback(this);

Add to your codes (onCreate)

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (!Settings.canDrawOverlays(this)) {
            Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName()));
            startActivityForResult(intent, 0);
        }
    }

Android: permission denied for window type 2038 using TYPE_APPLICATION_OVERLAY

I had the exactly same issue. I guess you should differentiate the target (before and after Oreo)

int LAYOUT_FLAG;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
     LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
} else {
        LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_PHONE;
}

params = new WindowManager.LayoutParams(
        WindowManager.LayoutParams.WRAP_CONTENT,
        WindowManager.LayoutParams.WRAP_CONTENT,
        LAYOUT_FLAG,
        WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
        PixelFormat.TRANSLUCENT);