BaseActivity +Databinding

  public class BaseActivity 
                  extends AppCompatActivity {
          protected B mBinding;
 
          @Override
          public void setContentView(int layoutResID) {
                  mBinding = DataBindingUtil.inflate(
                                  LayoutInflater.from(mContext),
                                  layoutResID, null, false);
                  super.setContentView(mBinding.getRoot());
  }