EventBus 详细使用教程［在Activity、Service、Receiver中Post］

添加EventBus

compile ‘de.greenrobot:eventbus:2.4.0‘

或

直接下载jar包 ｜点击下载

注册和注销EventBus

@Override
    protected void onStart() {
        super.onStart();
        //注册EventBus
        EventBus.getDefault().register(this);
        Logger.e("EventBus注册");
    }

    @Override
    protected void onStop() {
        super.onStop();
        //注销EventBus
        EventBus.getDefault().unregister(this);

        Logger.e("EventBus注销");
    }

自定义消息类型

public class MessageEvent {
    public String message;

    public MessageEvent(String message){
        this.message=message;
    }
}

创建消息接受

//接受消息的地方(在Android的UI线程中)
    public void onEventMainThread(MessageEvent event) {
        Logger.e("onEventMainThread"+event.message);
        tv_demo.setText(event.message);
    }

Post消息

1.在子线程中给Activity发消息更新UI

class MyThread extends Thread{
        @Override
        public void run() {
            //发送消息
            EventBus.getDefault().post(new MessageEvent("这是EventBus发送的消息更新UI"));
        }
    };

2.在Service中发消息给Activity更新UI

public class MyService extends Service {

    public static final String ACTION_START="ACTION_START";

    @Override
    public IBinder onBind(Intent intent) {
        return new Binder();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        if(ACTION_START.equals(intent.getAction())){
            new MyServerThread().start();
        }

        return super.onStartCommand(intent, flags, startId);
    }

    class MyServerThread extends Thread{
        @Override
        public void run() {
            EventBus.getDefault().post(new MessageEvent("这是在MyService的MyServerThread线程中Post的消息"));
        }
    }
}

3.在Receiver中发送消息给Activity更新UI

public class MyBroadcastReceiver extends BroadcastReceiver{
    public static final String ACTION_SEND="ACTION_SEND";

    @Override
    public void onReceive(Context context, Intent intent) {

        if (ACTION_SEND.equals(intent.getAction())){
            EventBus.getDefault().post(new MessageEvent("这是在［广播］中给Activity发送消息"));
        }
    }
}

github地址 ｜ 欢迎Star