匿名抽象类的实例化在MainActivity中引发错误

Question

在MainActivity中，我从（{https://medium.com/@prakash_pun/text-recognition-for-android-using-google-mobile-vision-a8ffabe3f5d6）中采用了以下方法：

private void startCameraSource() {

    ...

    if (!textRecognizer.isOperational()) {
        Log.w(TAG, "Detector dependencies not loaded yet");
    } else {

        ...

        //Set the TextRecognizer's Processor.
        textRecognizer.setProcessor(new Detector.Processor<com.google.android.gms.vision.text.TextBlock>() {
            @Override
            public void release() {
            }

            /**
             * Detect all the text from camera using TextBlock and the values into a stringBuilder
             * which will then be set to the textView.
             * */
            @Override
            public void receiveDetections(Detector.Detections<FirebaseVisionText.TextBlock> detections) {
                ...

            }
        });
    }
}

问题是我遇到了错误：error: <anonymous com.example.myqrcodescanner.MainActivity$5> is not abstract and does not override abstract method receiveDetections(Detections<TextBlock>) in Processor ，并且错误指向以下行：textRecognizer.setProcessor(new Detector.Processor<com.google.android.gms.vision.text.TextBlock>() {

有什么想法吗？