用户没有得到使用奥托时，发射 [英] Subscriber not getting fired when using Otto

问题描述

我想了奥托在Android和我试图从我的片段给活动发回的消息。下面是我的code的基础知识：

I'm trying out Otto on Android and i'm trying to send back a message from my Fragment to the Activity. Here's the basics of my code:

我的车商：

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code：

My Activity has the following code:

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);
    }

    // ...
}

和这些都是code中的重要数据位从我的片段：

and these are the important bits of code from my Fragment:

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;
        }
    }
}

我没有得到任何错误。但是，当我点击我的按钮从片段，该事件onButtonChoicePicked不会被调用。

I don't get any errors. But when i click my button from the fragment, the event onButtonChoicePicked doesn't get called.

我是不是做错了什么？ 我误解奥托是如何工作的？ 它是一个奇怪的组合ButterKnife和奥多，使得它不能正常工作？

Am I doing something wrong? Am i misunderstanding how Otto works? Is it a weird combination of ButterKnife and Otto that makes it not work?

推荐答案

这个例子code工作没有独立于任何的问题。我最初面临这样的问题（如被正确地指出@ powerj1984）原因：有在我的项目，其中被注入（通过匕首）总线是从已被预订的总线实例不同的配置错误更新：P

The example code works without any issues independently. The reason i was facing this problem initially (as was rightly pointed out by @powerj1984): There was a misconfiguration in my project, where the bus that was being injected (via Dagger) was different from the bus instance that was being subscribed to for updates :P.

教训：确保您使用的公交车，在两种情况下，同一个实例

Lesson learnt: make sure the bus you use, is the same instance in both cases.

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