如何使用greenrobot传递数据到活动或片段，其尚未被初始化？

问题描述

我试图用活动与片段之间greenrobot传递数据，但我无法找到合适的教程，说明如何在细节做到这一点。
根据我迄今读到我写了一些这样的东西，但它并不work.how我可以用绿色的机器人将数据传递到尚未inialized又一个活动或片段？

I tried to use greenrobot pass data between activities and fragment,but I couldn't find a suitable tutorial that show how do it in detail.Based on what I have read so far I wrote some thing like this,but it doesn't work.how can I use green robot to pass data to an activity or fragment that has not been inialized yet?

MainActivity：

MainActivity :

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    EventBus.getDefault().post(new String("We are the champions"));
    Intent intent = new Intent("com.test.Activity_Lessons");
    startActivity(intent);
}

Activity_Lessons：

Activity_Lessons :

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //Some initializations
    EventBus.getDefault().register(this);
    //Other Stuff
}

public void onEventMainThread(String s){
    Toast.makeText(getActivity(), s, Toast.LENGTH_LONG).show();
}

事件处理程序不会被调用here.what我哪里做错了？

The event handler is never called here.what am I doing wrong?

推荐答案

EventBus对发布和注册events.In哪些活动或片段尚未初始化，我们可以使用registerSticky和postSticky而不是寄存器和岗位的情况下两种方法。

EventBus has two methods for posting and registering events.In cases which activity or fragment is not yet initialized,we can use registerSticky and postSticky instead of register and post.

下面是我自己的修正code：

here is my own corrected code:

MainActivity：

MainActivity :

@Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    EventBus.getDefault().postSticky(new String("We are the champions"));
    Intent intent = new Intent("com.test.Activity_Lessons");
    startActivity(intent);
}

Activity_Lessons：

Activity_Lessons :

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //Some initializations
    EventBus.getDefault().registerSticky(this);
    //Other Stuff
}

public void onEventMainThread(String s){
    Toast.makeText(getActivity(), s, Toast.LENGTH_LONG).show();
}

这篇关于如何使用greenrobot传递数据到活动或片段，其尚未被初始化？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！