How to programmatically grant the "draw over other apps" permission in android?

Question

How can I programmatically grant the permission in Settings -> Apps -> Draw over other apps in Android? I want to use system alert window but unable to in Android Marshmallow without forcing the user to go through the Settings app and grant the permission first.

Answer 1

You can check and ask for overlay permission to draw over other apps using this

if (!Settings.canDrawOverlays(this)) {
    Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName()));
    startActivityForResult(intent, 0);
}

Answer 2

if (!Settings.canDrawOverlays(this)) {
    Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, 
    Uri.parse("package:" + getPackageName()));
    startActivityForResult(intent, 0);
}

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>