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public class MyReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
//TODO 1：获取action
String action = intent.getAction();
if("android.broad.action.customer".equals(action)){
Bundle bundle = intent.getExtras();
int msg=bundle.getInt("msg");
Log.i("广播", "接受到了一个广播: "+msg);
}
}
}

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 <!--收音机-->
<receiver android:name=".MyReceiver">
<!--调频-->
<intent-filter>
<action android:name="android.broad.action.customer" />
</intent-filter>
</receiver>

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public class MainActivity extends AppCompatActivity {
private MyReceiver receiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
receiver=new MyReceiver();
regeister();//注册广播
}
private void regeister() {
//TODO 1：创建过滤器
IntentFilter intentFilter=new IntentFilter();
//TODO 2：调频：
intentFilter.addAction("android.broad.action.customer");
//TODO 3：注册： 给这个Activity注册
registerReceiver(receiver,intentFilter);
}
@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(receiver);//解除注册
}
}

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//按钮的点击事件
public void customer(View view) {
Intent intent=new Intent();
intent.setAction("android.broad.action.customer");
Bundle bundle=new Bundle();
bundle.putString("msg","发送广播");
intent.putExtras(bundle);
sendBroadcast(intent);
}