AppCompatActivity 如何使用 EventBus 与 FragmentActivity 通信？

Question

问题，AppCompatActivity如何使用EventBus与FragmentActivity通信？

发现，FragmentActivity可以和AppCompatActivity通信，并且会调用onEvent方法，但是如果我们把通信路径切换到AppCompatActivity和FragmentActivity通信，onEvent方法永远不会被调用。

public class MainActivity extends AppCompatActivity{
 private String data;
 @Override protected void onCreate{
  data = "private String data from MainActivity";
  EventBus.getDefault().postSticky(data);
 }
}

public class AccountFade extends FragmentActivity{
 private String mAccountFadeData;
 @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
 public void onEvent(String s){
  Toast.makeText(this, "private String mAccountFadeData from MainActivity", Toast.LENGTH_LONG).show();
  this.mAccountFadeData = s;
 }

 @Override protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  EventBus.getDefault().register(this);
 }

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

Answer 1

您必须创建包含一个字符串变量的 class 并通过 EventBus 触发 class。

所以首先像这样创建 class

public class DataChangeEvent {
    private String data;

    public DataChangeEvent(String data) {
        this.data = data;
    }

    public String getData() {
        return data;
    }

    public void setData(String data) {
        this.data = data;
    }
}

现在将它用于您的活动

Post 在活动中：

 EventBus.getDefault().postSticky(new DataChangeEvent(data));

进入FragmentActivity :

 @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
 public void onEvent(DataChangeEvent event){
      Toast.makeText(this, "private String mAccountFadeData from MainActivity", Toast.LENGTH_LONG).show();
      this.mAccountFadeData = event.getData();
 }

AppCompatActivity 如何使用 EventBus 与 FragmentActivity 通信？

How can an AppCompatActivity communicate with FragmentActivity using the EventBus?

android

event-bus

greenrobot-eventbus

greenrobot-eventbus-3.0