1、跨進(jìn)程Messager 多應(yīng)用間單線(xiàn)程

把Messenger比喻為一個(gè)信使，信使的作用是派信；那么Message就比喻為信件、信封，即信使派的東西；那么Bundle是什么呢？Message里面保存了Bundle，那么bundle可以比喻為信紙，信紙上寫(xiě)滿(mǎn)了各種我們要傳遞的信息。讀到這里，讀者應(yīng)該明白了這三者在Messenger通訊方式內(nèi)所扮演的角色了。簡(jiǎn)單來(lái)說(shuō)：Messenger把裝有Bundle的Message發(fā)送到別的進(jìn)程。
###客戶(hù)端
private Messenger clientMessenger = new Messenger(handler);
private Handler handler = new Handler(Looper.getMainLooper()){
    @Override
    public void handleMessage(@NonNull Message msg) {
        super.handleMessage(msg);
        Bundle bundle = msg.getData();
        Log.i(TAG,"收到遠(yuǎn)程服務(wù)數(shù)據(jù)："+bundle.getString("service"));
    }
};

private void bindRemoteService(){
    Intent intent = new Intent();
    intent.setComponent(new ComponentName("com.example.xxx",
            "com.example.xxx.MessengerService"));
    boolean isBind = bindService(intent,conn, Service.BIND_AUTO_CREATE);
    Log.i(TAG,"bindRemoteService isBind="+isBind);
}
private Messenger messengerProxy;
ServiceConnection conn = new ServiceConnection() {
    @Override
    public void onServiceConnected(ComponentName name, IBinder iBinder) {
        Log.i(TAG,"onServiceConnected：");
        messengerProxy = new Messenger(iBinder);
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
        Log.i(TAG,"onServiceDisconnected：");
    }
};

private void sendData(){
    if (messengerProxy == null) return;
    Message message = new Message();
    message.replyTo = clientMessenger;
    Bundle bundle = new Bundle();
    bundle.putString("client","這是客戶(hù)端發(fā)送數(shù)據(jù)："+messageid);
    message.setData(bundle);
    messengerProxy.send(message);
   }

###服務(wù)端
//創(chuàng)建服務(wù)端Messenger
private final Messenger mMessenger = new Messenger(messengerHandler);

@Override
public IBinder onBind(Intent intent) {
    //向客戶(hù)端返回IBinder對(duì)象，客戶(hù)端利用該對(duì)象訪(fǎng)問(wèn)服務(wù)端
    return mMessenger.getBinder();
}
  //拿到客戶(hù)端的message 發(fā)送消息     
  private  Handler messengerHandler = new Handler(Looper.getMainLooper()) {
    @Override
    public void handleMessage(Message msg) {
        super.handleMessage(msg);
        //取出客戶(hù)端的消息內(nèi)容
        Bundle bundle = msg.getData();
        String clientMsg = bundle.getString("client");
        Log.i(TAG, "來(lái)自客戶(hù)端的消息：" + clientMsg);
        //新建一個(gè)Message對(duì)象，作為回復(fù)客戶(hù)端的對(duì)象
        Message message = Message.obtain();
        Bundle bundle1 = new Bundle();
        bundle1.putString("service", clientMsg+",服務(wù)端收到");
        message.setData(bundle1);
        try {
            msg.replyTo.send(message);
        } catch (RemoteException e) {
            e.printStackTrace();
        }
    }
};  

2、AIDL 多應(yīng)用間多線(xiàn)程

參數(shù)定向tag

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