How to handle SYSTEM_ALERT_WINDOW permission not being auto-granted on some pre-Marshmallow devices
1) on pre-API 23, the permission is already given, because the user granted it upon install. EDIT: it seems there is a bug on Android 6 (that will get fixed on 6.0.1), that if the user has denied this permission , the app will crash with SecurityException. No idea how Google fixed it though. 2) … Read more