interface ITestInterface {
   //获取进程ID
  int getProcessId();
  //处理字符串
  String dealString( String srcString);
  //字符串追加
  String appendString( String srcString);

  void addPerson(in Person person);

  List<Person> getPersons();
} 

  private final ITestInterface.Stub mBinder = new ITestInterface.Stub() {
    public int getProcessId(){
      Log.e("TestService","TestService Thread: " + Thread.currentThread().getName());
      Log.e("TestService","TestService getProcessId()");
      return android.os.Process.myPid();
    }
    //处理字符串
    public String dealString( String srcString)
    {
      return srcString+srcString;
    }

    //字符串追加
    public String appendString( String srcString)
    {
      return srcString+srcString;
    } 

  private ServiceConnection connection = new ServiceConnection() {

    @Override
    public void onServiceDisconnected(ComponentName name) {
      Log.e("TestService","TestService onServiceDisconnected()");
    }

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
      iTestInterface =  ITestInterface.Stub.asInterface(service);
      try {
        Log.e("TestService","TestService onServiceConnected()");
        int remoteId=iTestInterface.getProcessId();
        Log.e("TestService","TestService remoteId---->"+remoteId);
        int currentPid = android.os.Process.myPid();
        Log.e("TestService","TestService currentPid---->"+currentPid);
        Log.e("TestService","TestService dealString---->"+iTestInterface.dealString("Remote Service"));
        Log.e("TestService","TestService appendString---->"+iTestInterface.appendString("Remote Service"));
      } catch (RemoteException e) {
        e.printStackTrace();
      }
    }
  }; 

        int remoteId=iTestInterface.getProcessId();
        Log.e("TestService","TestService remoteId---->"+remoteId);
        int currentPid = android.os.Process.myPid();
        Log.e("TestService","TestService currentPid---->"+currentPid);
        Log.e("TestService","TestService dealString---->"+iTestInterface.dealString("Remote Service"));
        Log.e("TestService","TestService appendString---->"+iTestInterface.appendString("Remote Service")); 

    <service
      android:name=".TestService"
      android:enabled="true"
      android:exported="true"
      android:label="remoteService"
      android:process=":remote">
      <intent-filter android:priority="1000">
        <category android:name="android.intent.category.DEFAULT" />
        <action android:name="com.whoislcj.testaidl.TestService" />
      </intent-filter>
    </service> 

 Intent intent = new Intent("com.whoislcj.testaidl.TestService");
 intent.setPackage(getPackageName());//这里你需要设置你应用的包名
 bindService(intent, connection, Context.BIND_AUTO_CREATE);