onRequestPermissionsResult callback for the GPS Tutorial on the SSaurel's Channel

onRequestPermissionsResult.java

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
  switch(requestCode) {
    case ALL_PERMISSIONS_RESULT:
      for (String perm : permissionsToRequest) {
        if (!hasPermission(perm)) {
          permissionsRejected.add(perm);
        }
      }

      if (permissionsRejected.size() > 0) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
          if (shouldShowRequestPermissionRationale(permissionsRejected.get(0))) {
            new AlertDialog.Builder(MainActivity.this).
                setMessage("These permissions are mandatory to get your location. You need to allow them.").
                setPositiveButton("OK", new DialogInterface.OnClickListener() {
                  @Override
                  public void onClick(DialogInterface dialogInterface, int i) {
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                      requestPermissions(permissionsRejected.
					    toArray(new String[permissionsRejected.size()]), ALL_PERMISSIONS_RESULT);
                    }
                  }
                }).setNegativeButton("Cancel", null).create().show();
				
			return;
          }
        }

	  } else {
        if (googleApiClient != null) {
          googleApiClient.connect();
        }
      }

    break;
  }
}