android marshmallow - SMS_RECEIVED permission

Question

i recently updated my app to support android 6 marshmallow. i followed the instruction on https://developer.android.com/training/permissions/requesting.html

and add

Answer 1

You need a permission for api level 23+, google reworked the permission system so the app user can grant and revoke permissions after installing your app

final private int REQUEST_CODE_ASK_PERMISSIONS = 123;       

  if(Build.VERSION.SDK_INT < 23){
     //your code here
   }else {
    requestContactPermission();
   } 

private void requestContactPermission() {

   int hasContactPermission =ActivityCompat.checkSelfPermission(context,Manifest.permission.RECEIVE_SMS);

   if(hasContactPermission != PackageManager.PERMISSION_GRANTED ) {
    ActivityCompat.requestPermissions(Context, new String[]   {Manifest.permission.RECEIVE_SMS}, PERMISSION_REQUEST_CODE);
   }else {
    //Toast.makeText(AddContactsActivity.this, "Contact Permission is already granted", Toast.LENGTH_LONG).show();
     }
}


@Override
public void onRequestPermissionsResult(int requestCode, String[]           permissions, int[] grantResults) {
switch (requestCode) {
    case REQUEST_CODE_ASK_PERMISSIONS:
        // Check if the only required permission has been granted
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            Log.i("Permission", "Contact permission has now been granted. Showing result.");
            Toast.makeText(this,"Contact Permission is Granted",Toast.LENGTH_SHORT).show();
        } else {
            Log.i("Permission", "Contact permission was NOT granted.");
         } 
         break;
  }
}