@Override
 public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(getLayoutResourceId());
   ButterKnife.inject(this);
   tvNext.setText(R.string.btn_header_bar_next);
   tvBack.setText(R.string.btn_header_bar_cancel);
   tvTitle.setText(getTitleStringRes());
 }
 @Override
 public void onBackPressed() {
   super.onBackPressed();
   overridePendingTransition(0, R.anim.up2down_exit);
 }