package com.helang.messagecenterdemo;
 
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import android.support.annotation.Nullable;
import android.util.Log;
 
import com.helang.lib.IMyAidlCallBackInterface;
import com.helang.lib.IMyAidlInterface;
 
/**
 * 消息服務(wù)中心(記得在 manifest.xml 加上 android:exported="true")
 */
public class MyService extends Service {
  private final static String TAG = MyService.class.getSimpleName();
  private RemoteCallbackList<IMyAidlCallBackInterface> callbackList = new RemoteCallbackList<>();//回調(diào)的關(guān)鍵（API>=17,才能使用）
 
  @Override
  public void onCreate() {
    super.onCreate();
  }
 
  @Nullable
  @Override
  public IBinder onBind(Intent intent) {
    return iBinder;
  }
 
  /**
   * 實(shí)現(xiàn)iBinder
   */
  private IMyAidlInterface.Stub iBinder = new IMyAidlInterface.Stub() {
    @Override
    public void sendMessage(String tag, String message) throws RemoteException {
      callbackList.beginBroadcast();
      sendMessageToAllClient(tag,message);
      Log.d(TAG,"tag="+tag+" message="+message);
      callbackList.finishBroadcast();
    }
 
    @Override
    public void registerListener(IMyAidlCallBackInterface listener) throws RemoteException {
      callbackList.register(listener);//注冊回調(diào)listener
      Log.d(TAG,"registerListener");
    }
 
    @Override
    public void unregisterListener(IMyAidlCallBackInterface listener) throws RemoteException {
      callbackList.unregister(listener);//取消回調(diào)listener
      Log.d(TAG,"unregisterListener");
    }
  };
 
  /**
   * 發(fā)送消息給全部的client（你也可以指定發(fā)送給某個(gè)client,也可
   * 以根據(jù)自己的業(yè)務(wù)來封裝一下Bean，記得要實(shí)現(xiàn)Parcelable接口來序列化
   * @param tag
   * @param message
   */
  private void sendMessageToAllClient(String tag,String message){
    for (int i = 0 ; i < callbackList.getRegisteredCallbackCount();i++){
      try {
        callbackList.getBroadcastItem(i).callback(tag,message);
      } catch (RemoteException e) {
        e.printStackTrace();
      }
    }
  }
}

package com.helang.app2;
 
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Handler;
import android.os.IBinder;
import android.os.RemoteException;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
 
import com.helang.lib.IMyAidlCallBackInterface;
import com.helang.lib.IMyAidlInterface;
 
public class MainActivity extends AppCompatActivity {
  private EditText editText;
  private Button bt_send;
  private TextView text;
 
  private IMyAidlInterface iMyAidlInterface;
  private ServiceCallBack serviceCallBack;
 
  private MyServiceConnection myServiceConnection;
 
  private Handler handler = new Handler();
 
 
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    bt_send = findViewById(R.id.bt_send);
    editText = findViewById(R.id.editText);
    text = findViewById(R.id.text);
 
    bt_send.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        if (iMyAidlInterface != null){
          try {
            iMyAidlInterface.sendMessage("app2",editText.getText().toString().trim());
          } catch (RemoteException e) {
            e.printStackTrace();
          }
        }
      }
    });
 
    bindService();
  }
 
  @Override
  protected void onDestroy() {
    super.onDestroy();
    unbindService();
  }
 
  private void bindService(){
    myServiceConnection = new MyServiceConnection();
    serviceCallBack = new ServiceCallBack();
    Intent intent = new Intent();
    intent.setComponent(new ComponentName("com.helang.messagecenterdemo",
        "com.helang.messagecenterdemo.MyService"));
    startService(intent);//開啟遠(yuǎn)程服務(wù)
    bindService(intent,myServiceConnection,BIND_AUTO_CREATE);//綁定服務(wù)
 
  }
 
  private void unbindService(){
    if (myServiceConnection != null){
      try {
        iMyAidlInterface.unregisterListener(serviceCallBack);
      } catch (RemoteException e) {
        e.printStackTrace();
      }
      unbindService(myServiceConnection);
    }
  }
 
  /**
   * 連接Service
   */
  class MyServiceConnection implements ServiceConnection {
 
    @Override
    public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
      iMyAidlInterface = IMyAidlInterface.Stub.asInterface(iBinder);
 
      handler.post(new Runnable() {
        @Override
        public void run() {
          //注冊回調(diào)
          if (iMyAidlInterface != null){
            try {
              iMyAidlInterface.registerListener(serviceCallBack);
            } catch (RemoteException e) {
              e.printStackTrace();
            }
          }
        }
      });
 
    }
 
    @Override
    public void onServiceDisconnected(ComponentName componentName) {
 
    }
  }
 
  /**
   * service回到client的類
   */
  class ServiceCallBack extends IMyAidlCallBackInterface.Stub{
 
    @Override
    public void callback(final String tag, final String message) throws RemoteException {
      runOnUiThread(new Runnable() {
        @Override
        public void run() {
          text.append("tag="+tag+" message="+message);
        }
      });
    }
  }
}