Android应用程序四大组件之使用AIDL如何实现跨进程调用Service

package com.jereh.remote;
interface LocalService{
    String getLocal();
}

public class MyRemoteService extends Service {
  @Override
  public IBinder onBind(Intent arg0) {
    // TODO Auto-generated method stub
    return new MyRemoteServiceImpl();
  }
  private class MyRemoteServiceImpl extends LocalService.Stub{
    @Override
    public String getLocal() throws RemoteException {
      // TODO Auto-generated method stub
      return "烟台杰瑞教育";
    }
  }
}

public class MainActivity extends Activity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
  }
  public void startService(View view){
    Intent service=new Intent("com.jereh.remote_service");
    super.bindService(service, conn, Context.BIND_AUTO_CREATE);
  }
  public void showInfo(View view){
    try {
      local=service.getLocal();
      Log.d("jereh", local);
      Toast.makeText(this, 
"您已进入"+local,Toast.LENGTH_LONG).show();
    } catch (RemoteException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
private  LocalService service;
private  String local;
private ServiceConnection cOnn=new ServiceConnection() {
    @Override
    public void onServiceDisconnected(ComponentName arg0) {
    }
    @Override
    public void onServiceConnected(ComponentName name, IBinder binder) {
      // TODO Auto-generated method stub
      // 获取远程Service的onBinder方法返回的对象代理  
      service=LocalService.Stub.asInterface(binder);
    }
  };
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }
}