BroadcastReceiver简单应用实例

    BroadcastReceiver是android四大组件之一，主要用于接收广播，它的简单实现方法如下：

1、定义继承BroadcastReceiver的MyReceiver类：

/**
 * Created by Haoye on 2016/3/7.
 * Copyright © 2016 Haoye All Rights Reserved
 */
public class MyReceiver extends BroadcastReceiver {
    private static final String TAG = "MyReceiver";

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

    }
}

2、在清单文件中注册广播接收器：

<receiver android:name=".MyReceiver"/>

3、用sendBroadcast()函数发送广播：

Intent intent = new Intent(MainActivity.this, MyReceiver.class);
intent.setAction("music.play");

sendBroadcast(intent);

4、在onReceive()函数中接收广播：
    修改 onReceive()函数：

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i(TAG, "onReceive");
        if ("music.play".equalsIgnoreCase(intent.getAction())) {
            Log.e(TAG, "getAction");
        }
    }

5.运行测试：
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