eventBus的使用步骤:

 

//在Activity中,注册和反注册

@Override protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

EventBus.getDefault().register(this); //第1步: 注册

}

@Override protected void onDestroy() {

super.onDestroy();

EventBus.getDefault().unregister(this);//反注册

}

 

//在注册了的Activity中,声明处理事件的方法

//第2步:注册一个在后台线程执行的方法,用于接收事件

@Subscribe(threadMode = ThreadMode.BackgroundThread)

public void onUserEvent(ClassEvent event) {

　//参数必须是ClassEvent类型, 否则不会调用此方法

}

//在任意地方,调用发送事件

EventBus.getDefault().post(new ClassEvent());//第3步: 发送事件

 

//在任意地方,注册事件类

class ClassEvent{} //定义一个事件, 可以不包含成员变量,和成员方法

 

 

新版本的eventBus的使用,接收数据的回调方法变成了这样:

　 @Subscribe(threadMode = ThreadMode.MainThread) //在ui线程执行    public void onUserEvent(UserEvent event) { }

@Subscribe(threadMode = ThreadMode.BackgroundThread) //在后台线程执行    public void onUserEvent(UserEvent event) { }

 

@Subscribe(threadMode = ThreadMode.Async) //强制在后台执行    public void onUserEvent(UserEvent event) { }

@Subscribe(threadMode = ThreadMode.PostThread) //默认方式, 在发送线程执行    public void onUserEvent(UserEvent event) { } 举个例子,用eventBus代替handler,实现秒表:

public class MainActivity extends AppCompatActivity {
          private TextView mTextView;     private int time = 0;     @Override     protected void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         EventBus.getDefault().register(this);         mTextView = (TextView) findViewById(R.id.tv_showtime);         mTextView.setText(0 + "");         getTime();     }     private void getTime() {
              new Thread(new Runnable() {
                  @Override             public void run() {
                      try {
                          time++;                     Thread.sleep(1000);                     EventBus.getDefault().post(new FirstEvent(time + ""));                 } catch (InterruptedException e) {
                          e.printStackTrace();                 }             }         }).start();     }     @Subscribe(threadMode = ThreadMode.MainThread)     public void onUseEvent(FirstEvent event) {
              boolean isMainThread = Thread.currentThread() == Looper.getMainLooper().getThread();         Log.i("xyz", "" + isMainThread);         mTextView.setText(event.getMsg());         getTime();     } }

 

 

 

 

 

 

 

 

 

 

 

 

其中FirsrtEvent就是简单的一个实体类:

public class FirstEvent {
         private String mMsg;    public FirstEvent(String msg) {
            // TODO Auto-generated constructor stub       mMsg = msg;    }    public String getMsg(){
            return mMsg;    } }