EventBus通信

需求：

1.ActivityA打开ActivityB

2.在B中执行某操作后，同时执行A中的方法

lib下载：eventbus-2.4.0.jar  jmmy

1.在EventBusTestActivity注册eventBus

EventBus.getDefault().register(this);// 注册广播

2.点击事件跳转

Intent intent = new Intent(getApplicationContext(),EventBusTest2Activity.class);

startActivity(intent);

3.在EventBusTest2Activity中发送广播

EventBus.getDefault().post(new MyEvent("Message From EventBusTest2"));

4.EventBusTestActivity接收广播

// onEvent会放在发送事件的那个线程中去执行，不能进行UI更新

    public void onEvent(MyEvent event) {

        Log.i("What", "[onEvent]My Thread is "

                + Thread.currentThread().getName());

    }

// onEventMainThread就是会放到主线程去执行的事件处理，一般在其中进行比如UI的更新的操作

    public void onEventMainThread(MyEvent event) {

        Log.i("What", "[onEventMainThread] Thread is "

                + Thread.currentThread().getName());

        test1.setText("测试完成");

    }

5.解除广播

protected void onDestroy() {

　　super.onDestroy();

　　EventBus.getDefault().unregister(this);// 解除

}

下面贴上源码：

package com.example.activity;

import com.example.event.MyEvent;

import de.greenrobot.event.EventBus;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class EventBusTestActivity extends Activity implements OnClickListener {

    private Button test1;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_event_bus_test);

        test1 = (Button) findViewById(R.id.test1);

        test1.setOnClickListener(this);

        EventBus.getDefault().register(this);// 注册广播

    }

    // onEvent会放在发送事件的那个线程中去执行，不能进行UI更新

    public void onEvent(MyEvent event) {

        Log.i("What", "[onEvent]My Thread is "

                + Thread.currentThread().getName());

    }

    // onEventMainThread就是会放到主线程去执行的事件处理，一般在其中进行比如UI的更新的操作

    public void onEventMainThread(MyEvent event) {

        Log.i("What", "[onEventMainThread] Thread is "

                + Thread.currentThread().getName());

        test1.setText("测试完成");

    }

    @Override

    public void onClick(View v) {

        switch (v.getId()) {

        case R.id.test1:

            Intent intent = new Intent(getApplicationContext(),

                    EventBusTest2Activity.class);

            startActivity(intent);

            break;

        }

    }

    @Override

    protected void onDestroy() {

        super.onDestroy();

        EventBus.getDefault().unregister(this);// 解除

    }

}

package com.example.activity;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import com.example.event.MyEvent;

import de.greenrobot.event.EventBus;

public class EventBusTest2Activity extends Activity {

    private Button click1;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_event_bus_test2);

        click1 = (Button) findViewById(R.id.click1);

        click1.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                EventBus.getDefault().post(

                        new MyEvent("Message From EventBusTest2"));

            }

        });

    }

}