Android Studio- Face detection failed. E/CameraSource: Exception thrown from receiver

问题

I'm trying to get current frame as a Bipmap I'm running into these errors:

09-03 08:12:33.353 28008-28204/com.google.android.gms.samples.vision.face.facetracker E/CameraSource: Exception thrown from receiver.
    java.lang.ArrayIndexOutOfBoundsException
        at android.graphics.Bitmap.checkPixelsAccess(Bitmap.java:1492)
        at android.graphics.Bitmap.getPixels(Bitmap.java:1433)
        at com.google.android.gms.samples.vision.face.facetracker.FaceTrackerActivity$MyFaceDetector.detect(FaceTrackerActivity.java:318)
        at com.google.android.gms.vision.Detector.receiveFrame(Unknown Source)
        at com.google.android.gms.vision.CameraSource$zzb.run(Unknown Source)
        at java.lang.Thread.run(Thread.java:761)

Face Detection not don't appear on the screen. This is my Main_activity (colled FaceTrackingActivity):

private void createCameraSource() {

    Context context = getApplicationContext();
    FaceDetector detector = new FaceDetector.Builder(context)
        .setClassificationType(FaceDetector.ALL_CLASSIFICATIONS)
        .setMode(FaceDetector.ACCURATE_MODE)
        .setLandmarkType(FaceDetector.ALL_LANDMARKS)
        .build();
    MyFaceDetector myFaceDetector = new MyFaceDetector(detector);

    myFaceDetector.setProcessor(
                new MultiProcessor.Builder<>(new GraphicFaceTrackerFactory())
                        .build());

    if (!detector.isOperational()) {

        Log.w(TAG, "Face detector dependencies are not yet available.");
    }

    mCameraSource = new CameraSource.Builder(context, myFaceDetector)
        .setRequestedPreviewSize(640, 480)
        .setFacing(CameraSource.CAMERA_FACING_FRONT)
        .setRequestedFps(30.0f)
       .build();
}

and This is a code part where I'm trying to get a Bipmap image:

class MyFaceDetector extends Detector<Face> {
    private Detector<Face> mDelegate;

    MyFaceDetector(Detector<Face> delegate) {
        mDelegate = delegate;
    }

    public SparseArray<Face> detect(Frame frame) {
        YuvImage yuvImage = new YuvImage(frame.getGrayscaleImageData().array(), ImageFormat.NV21, frame.getMetadata().getWidth(), frame.getMetadata().getHeight(), null); // Create YUV image from byte[]
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        yuvImage.compressToJpeg(new Rect(0, 0, frame.getMetadata().getWidth(), frame.getMetadata().getHeight()), 100, byteArrayOutputStream);// Convert YUV image to Jpeg
        byte[] jpegArray = byteArrayOutputStream.toByteArray();
        Bitmap bmp = BitmapFactory.decodeByteArray(jpegArray, 0, jpegArray.length); // Convert Jpeg to Bitmap
        //image processing part
    }
}

In particular, inside createCameraSOurce part, if I don't write FaceDetector before detector and if I use the string _detector.setProcessor(...)_instead myFaceDetector.setProcessor(...) face appear and app run without errors but myFaceDetector of "MyFaceDetector myFaceDetector = new MyFaceDetector(detector);" is never used. I would like to process only the face detection box, but when I try to change something, I'm wrong

来源：https://stackoverflow.com/questions/52145789/android-studio-face-detection-failed-e-camerasource-exception-thrown-from-rec