public abstract class BaseActivity extends FragmentActivity implements UiOperation {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(getLayoutResID());
    View rootView = findViewById(android.R.id.content); // android.R.id.content这个id可以获取到Activity的根View
    Utils.findButtonSetOnClickListener(rootView,** this**);//这个this是指？
    initView();
    initListener();
    initData();
}
其中UiOperation定义为public interface UiOperation extends OnClickListener

Utils.findButtonSetOnClickListener方法定义为public static void findButtonSetOnClickListener(View view, OnClickListener listener)