本文实例讲述了Android开发使用Messenger及Handler进行通信的方法。分享给大家供大家参考，具体如下：

1. 客户端service

public class MessageService extends Service { private static final int MSG_SET_VALUE = 0x110; private Handler mHandler = new Handler() { public void handleMessage(Message msgFromClient) { // 返回给客户的信息 Message msgToClient = Message.obtain(msgFromClient); switch (msgFromClient.what) { // msg 客户端传来的消息 case MSG_SET_VALUE: try { msgToClient.what = MSG_SET_VALUE; SystemClock.sleep(2000); msgToClient.arg2 = msgFromClient.arg1 + msgFromClient.arg2; //msgFromClient.replyTo.send(msgToClient); //得到客户端的信使对象，并向它发送消息 cMessenger = msgFromClient.replyTo; cMessenger.send(msgToClient); } catch (RemoteException e) { e.printStackTrace(); } break; default: break; } } }; private Messenger mMessager = new Messenger(mHandler); private Messenger cMessenger; @Override public IBinder onBind(Intent intent) { return mMessager.getBinder(); } @Override public void onDestroy() { cMessenger = null; super.onDestroy(); }}

2. 服务器端service

public class MessageService extends Service { private static final int MSG_SET_VALUE = 0x110; private Handler mHandler = new Handler() { public void handleMessage(Message msgFromClient) { // 返回给客户的信息 Message msgToClient = Message.obtain(msgFromClient); switch (msgFromClient.what) { // msg 客户端传来的消息 case MSG_SET_VALUE: try { msgToClient.what = MSG_SET_VALUE; SystemClock.sleep(2000); msgToClient.arg2 = msgFromClient.arg1 + msgFromClient.arg2; //msgFromClient.replyTo.send(msgToClient); //得到客户端的信使对象，并向它发送消息 cMessenger = msgFromClient.replyTo; cMessenger.send(msgToClient); } catch (RemoteException e) { e.printStackTrace(); } break; default: break; } } }; private Messenger mMessager = new Messenger(mHandler); private Messenger cMessenger; @Override public IBinder onBind(Intent intent) { return mMessager.getBinder(); } @Override public void onDestroy() { cMessenger = null; super.onDestroy(); }}

3. 客户端使用

public class MainActivity extends Activity { private static final int MSG_SET_VALUE = 0x110; private TextView mTVStatus; // 连接状态 private LinearLayout mLLContainer;// 用来添加接收到服务器返回的信息 private Messenger mService; // 客户端信使 private boolean isConnecting; // 是否连接 private Handler mHandler = new Handler() { public void handleMessage(Message msgFromServer) { switch (msgFromServer.what) { case MSG_SET_VALUE: TextView tv = (TextView) findViewById(msgFromServer.arg1); tv.setText(tv.getText() + "==>" + msgFromServer.arg2); break; } super.handleMessage(msgFromServer); }; }; private Messenger mMessenger = new Messenger(mHandler); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mTVStatus = (TextView) findViewById(R.id.tv_status); mLLContainer = (LinearLayout) findViewById(R.id.ll_container); } int i = 0; public void send(View view){ try { int a = i++; int b = (int) (Math.random() * 100); //创建一个tv,添加到LinearLayout中 TextView tv = new TextView(MainActivity.this); tv.setText(a + " + " + b + " = caculating ..."); tv.setId(a); mLLContainer.addView(tv); Message msgFromClient = Message.obtain(null, MSG_SET_VALUE, a, b); msgFromClient.replyTo = mMessenger; if (isConnecting) { //往服务端发送消息 mService.send(msgFromClient); } } catch (RemoteException e) { e.printStackTrace(); } } public void bind(View view) { Intent service = new Intent(); service.setAction("android.intent.action.MESSAGE_SERVER"); bindService(service, conn, Context.BIND_AUTO_CREATE); } private ServiceConnection conn = new ServiceConnection() { @Override public void onServiceDisconnected(ComponentName name) { mService = null; isConnecting = false; mTVStatus.setText("已断开连接！"); } @Override public void onServiceConnected(ComponentName name, IBinder service) { mService = new Messenger(service); isConnecting = true; mTVStatus.setText("连接成功！"); } }; public void unbind(View view) { unbindService(conn); conn = null; } @Override protected void onDestroy() { unbindService(conn); conn = null; super.onDestroy(); }}

更多关于Android相关内容感兴趣的读者可查看本站专题：《Android通信方式总结》、《Android开发入门与进阶教程》、《Android调试技巧与常见问题解决方法汇总》、《Android基本组件用法总结》、《Android视图View技巧总结》、《Android布局layout技巧总结》及《Android控件用法总结》

希望本文所述对大家Android程序设计有所帮助。