Question

当我从FragmentA触发事件时，我在MyComctivity的两个片段的组合（按钮点击）我想在FragmentB按钮状态中更改为启用true和textview setText（＆＃34;新文本＆＃34;） FragmentB，当我运行我的应用程序输出时显示没有错误但不做任何更改这是我的片段，它发射事件

    Fragment A
        ...//some code
         @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_a, container, false);
        ...//more code inside onCreateView
          btnChange.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
        //HERE I POST THE EVENT
                    EventBus.getDefault().post(new ButtonEvent(true));
//   HERE I PUT SOUT TO SHOW IF EVENT IS FIRED
                    System.out.println("YOU FIRED THE EVENT");// THIS MSG IS SHOWN CORRECTLY
        }
      });
}

    @Subscribe
    public void onEvent(ButtonEvent event){

    }

@Override
  public void onStart() {
    super.onStart();
    if (!EventBus.getDefault().isRegistered(getActivity())) {
      EventBus.getDefault().register(this);
    }
  }

  @Override
  public void onStop() {
    super.onStop();
    EventBus.getDefault().unregister(this);
  }

这里是FragmentB

 FragmentB extends Fragment{
...//some code

 @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_b, container, false);
 btnNuevoMed= (Button) rootView.findViewById(R.id.btnNuevoMed);
    btnNuevoMed.setEnabled(false);
    txtMed= (TextView)rootView.findViewById(R.id.txtMed);
//...some other code
}
//HERE IS MI SUBSCRIBER
@Subscribe
public void onEvent(ButtonEvent event){
// HERE I PUT A SOUT TO SHOW IF REACH THE METHOD
 System.out.println("YOU ARE HEREEEEE");  //BUT NEVER REACH THIS METHOD . WHY?
    btnNuevoMed.setEnabled(event.status);
    btnNuevoMed.setText("hELLOOO");
    txtMed.setText("Modification Success");
}
 @Override
  public void onStart() {
    super.onStart();
    if (!EventBus.getDefault().isRegistered(getActivity())) {
      EventBus.getDefault().register(this);
    }
  }

  @Override
  public void onStop() {
    super.onStop();
    EventBus.getDefault().unregister(this);
  }

这是我的按钮xml

 <TextView
        android:id="@+id/txtMed"
        android:text="MEDICACION"
        style="@style/textoTitulos"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"/>

 <Button
        android:text="Nuevo Boton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btnNuevoMed"

        />

即时通讯使用eventbus 3.0.0。我的代码出了什么问题？我怎么能解决这个问题？为什么我无法达到听众方法？提前谢谢..

Answer 1

试试这个：

在片段中像这样的帖子事件

EventBus.getDefault().postSticky(new ButtonEvent(true));

在Fragment B寄存器中订阅如下：

@Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
public void onEvent(ButtonEvent event){
    //

EventBus不会更新textview或按钮，也不显示任何错误？

1 个答案: