WindowManager$BadTokenException unable to add window

Question

I am developing app for background videorecording ,thats why i used WindowManager,but it did not worked for me.gives following errors:

08-         


        

Answer 1

Starting from marshmallow versions the permission approval is a little bit complex. So even after giving the above permission this issue is not resolved. Please see the following link.

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

Answer 2

08-23 15:38:21.021: E/AndroidRuntime(4200): Caused by: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@418c0b68 -- permission denied for this window type

Problem: Permission missing in maifest file.

Solution: Use following permission in AndroidManifest.

android.permission.SYSTEM_ALERT_WINDOW

Answer 3

if your application apiLevel >= 19, don't use

WindowManager.LayoutParams.TYPE_PHONE or WindowManager.LayoutParams.TYPE_SYSTEM_ALERT

you can use

LayoutParams.TYPE_TOAST

or

TYPE_APPLICATION_PANEL

now my code for LayoutParams is like,

WindowManager.LayoutParams params = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.TYPE_TOAST,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.TRANSLUCENT);