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

   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (!Settings.System.canWrite(getApplicationContext())) {
            Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS, Uri.parse("package:" + getPackageName()));
            startActivityForResult(intent, 200);
        }
    }

this works like a charm.