Android 6.0 Permission Denial: requires permission android.permission.WRITE_SETTINGS

Question

As you can see from my manifest below, I\'ve added the permission,What am I missing?

Answer 1

This is a special case: permision level:signature ,

If the app targets API level 23 or higher, the app user must explicitly grant this permission to the app through a permission management screen.

The app requests the user's approval by sending an intent with action ACTION_MANAGE_WRITE_SETTINGS.

The app can check whether it has this authorization by calling Settings.System.canWrite().