I want a solution to grant android app's permission like 'android.permission.ACCESS_FINE_LOCATION'/'android.permission.CALL_PHONE' at background, with out any finger gestures.
The solution should compatible with any App ,and android 4.1 - android 6.0, without rooting devices.
As the result of the solution, if a app access the location at first time, the android device won't pop up the permission dialog.
Delivery condition: 1. The source of the solution; 2. The document explaining how the solution works.