Request Permission Camera on the SSaurel's Blog

RequestPermissionCamera.java

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
  switch(requestCode) {
    case CAMERA_REQUEST :
      if (grantResults.length > 0  &&  grantResults[0] == PackageManager.PERMISSION_GRANTED) {
        buttonEnable.setEnabled(false);
        buttonEnable.setText("Camera Enabled");
        imageFlashlight.setEnabled(true);
      } else {
        Toast.makeText(MainActivity.this, "Permission Denied for the Camera",
                		Toast.LENGTH_SHORT).show();
      }
    break;
  }
}