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Messenger类可以在不同进程中传递Messge对象进行数据通信
Messenger是轻量级的IPC方案对AIDL进行了封装。
步骤：
1、在Service的onBind()方法中创建Messenger对象，并关联Handler
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_FROMCLIENT:
Log.i(TAG,"收到客户端信息-------"+msg.getData().get("msg"));
//得到客户端传来的Messenger对象
Messenger mMessenger=msg.replyTo;
Message mMessage=Message.obtain(null,MessengerService.MSG_FROMCLIENT);
Bundle mBundle=new Bundle();
mBundle.putString("rep","这里是服务端，我们收到信息了");
mMessage.setData(mBundle);
try {
mMessenger.send(mMessage);
} catch (RemoteException e) {
e.printStackTrace();
}
break;
}
}
};
@Override
public IBinder onBind(Intent intent) {
return new Messenger(mHandler).getBinder();
}
}
//在清单文件中 注册为 远程Service android:process=":remote
2.在Activity中
private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what){ case MessengerService.MSG_FROMCLIENT: Log.i(MessengerService.TAG, "收到服务端信息-------" + msg.getData().get("rep")); break; } } };
private ServiceConnection mServiceConnection=new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) {
//通过 IBinder 对象 创建 Messenger对象 mMessenger=new Messenger(service); Message mMessage=Message.obtain(null,MessengerService.MSG_FROMCLIENT); Bundle mBundle=new Bundle(); mBundle.putString("msg", "这里是客户端，收到了嘛服务端"); mMessage.setData(mBundle); //将Messenger传递给服务端 mMessage.replyTo=new Messenger(mHandler); try { mMessenger.send(mMessage); } catch (RemoteException e) { e.printStackTrace(); } }
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原文地址：http://www.cnblogs.com/pbq-dream/p/5395544.html
