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:

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Answer 1

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