Android使用Messenger实现service与activity交互

概述service与activity交互的方式有多种，这里说说使用Messenger来实现两者之间的交互。

service与activity交互的方式有多种，这里说说使用Messenger来实现两者之间的交互。

Service程序:

public class MessengerService extends Service { final Messenger mMessenger = new Messenger(new IncomingHandler()); @OverrIDe public IBinder onBind(Intent intent) {  return mMessenger.getBinder(); } @Suppresslint("HandlerLeak") class IncomingHandler extends Handler {  @OverrIDe  public voID handleMessage(Message msg) {   switch (msg.what) {   case 0:    Toast.makeText(MessengerService.this,"Hello lenve!",Toast.LENGTH_LONG).show();    break;   case 1:    Toast.makeText(MessengerService.this,"Hello lenve!Hello World!",Toast.LENGTH_LONG).show();    break;   default:    break;   }  } }}

MainActivity.javaL:

public class MainActivity extends Activity { private Messenger mMessenger; private ServiceConnection conn; private Intent intent; @OverrIDe protected voID onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentVIEw(R.layout.activity_main);  intent = new Intent(this,MessengerService.class);  conn = new ServiceConnection() {   @OverrIDe   public voID onServicedisconnected(Componentname name) {    mMessenger = null;   }   @OverrIDe   public voID onServiceConnected(Componentname name,IBinder service) {    mMessenger = new Messenger(service);   }  }; } @OverrIDe protected voID onStart() {  super.onStart();  bindService(intent,conn,BIND_auto_CREATE); } @OverrIDe protected voID onStop() {  super.onStop();  unbindService(conn); } public voID onClick(VIEw v){  Message msg = null;  switch (v.getID()) {  case R.ID.button1:   msg = Message.obtain(null,0);   try {    mMessenger.send(msg);   } catch (remoteexception e) {    e.printstacktrace();   }   break;  case R.ID.button01:   msg = Message.obtain(null,1,0);   try {    mMessenger.send(msg);   } catch (remoteexception e) {    e.printstacktrace();   }   break;  default:   break;  } }}

原文链接：http://blog.csdn.net/u012702547/article/details/46989417

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