使用 Otto 时订阅者不会被解雇

我正在 Android 上尝试 Otto，并尝试将消息从我的 Fragment 发送回 Activity。这是我的代码的基础知识：

我的巴士提供商：

public final class BusProvider {

 private static final Bus mInstance = new Bus();

 private BusProvider() {}

 public static Bus getBusProviderInstance() {
     return mInstance;
 }
}

我的活动有以下代码：

public class MyActivity
        extends BaseActivity {

    // ....

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        BusProvider.getBusProviderInstance().register(this);
        // ....
    }

    @OnClick(R.id.profile_image)
    public void onImageClicked() {

        // ...

        MyFragment fragment = MyFragment.newInstance(choices);
        fragment.show(getFragmentManager(), "myChoices");
    }

    @Subscribe
    public void onButtonChoicePicked(MyFragment.ChoicePickedEvent event) {
        Toast.makeText(this, "reaching here", Toast.LENGTH_SHORT).show();
    }

    @Override
    protected void onStop() {
        super.onStop();
        BusProvider.getBusProviderInstance().unregister(this);
    }

    // ...
}

这些是我的片段中的重要代码：

public class MyFragment
        extends BaseDialogFragment {

        // ...

        @Override
        public View onCreateView(LayoutInflater inflater,
                                 ViewGroup container,
                                 Bundle savedInstanceState) {

            LinearLayout layout = (LinearLayout) inflater.inflate(R.layout.dialog_choices,
                                                                  container,
                                                                  false);
            setupDialogButtons(inflater, layout);
            return layout;
        }



    private void setupDialogButtons(LayoutInflater inflater, LinearLayout parentView) {
        ChoiceButtonViewHolder holder;

        holder = new ChoiceButtonViewHolder(inflater, parentView);
        holder.populateContent("First Choice", 1);

        parentView.addView(holder.mChoiceTextView);
    }


    class ChoiceButtonViewHolder {

        @InjectView(R.id.item_dialog_choice_desc) TextView mChoiceTextView;
        private int mPosition;

        ChoiceButtonViewHolder(LayoutInflater inflater, ViewGroup container) {
            TextView mChoiceTextView = (TextView) inflater.inflate(R.layout.item_dialog_choice, container, false);
            ButterKnife.inject(this, mChoiceTextView);
        }

        public void populateContent(String choiceDesc, int position) {
            mChoiceTextView.setText(choiceDesc);
            mPosition = position;
        }

        @OnClick(R.id.item_dialog_choice_desc)
        public void onChoiceClicked() {
            MyFragment.this.mDialog.dismiss();
            BusProvider.getBusProviderInstance().post(new ChoicePickedEvent(1));
        }
    }



    public static class ChoicePickedEvent {
        public int mPositionClicked;
        ChoicePickedEvent(int position) {
            mPositionClicked = position;
        }
    }
}

我没有收到任何错误。但是当我从片段中单击按钮时，事件 onButtonChoicePicked 不会被调用。

难道我做错了什么？ 我是否误解了奥托的工作方式？ 难道 ButterKnife 和 Otto 的奇怪组合导致它不起作用？

确保您导入的是“com.squareup.otto.Subscribe”而不是“com.google.common.eventbus.Subscribe”