如何避免重复拍摄图像

Question

我是 android 的新人 development.I 目前正在开发一个应用程序，将身份证中的图像与 face.From UploadActivity 的图像进行比较，用户将捕获身份证点击"OK"后用户会被提示从LivenessActivity直播前置摄像头抓拍用户的脸。据说做完眨眼动作后，人脸会被成功抓拍并自动提示UploadActivity.在UploadActivity,用户点击按钮"VIEWFACE"然后人脸图像会appear.But不幸的是,在捕获人脸图像的过程中,LivenessActivity一直出现要求用户捕获再次。但是如果用户点击后退按钮，那么它会提示UploadActivity。如何避免LivenessActivity在捕获面部后继续出现？

这是我的Upload Activity和LivenessActivity供大家参考：

上传活动：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_upload);

    txtPercentage = (TextView) findViewById(R.id.txtPercentage);

    progressBar = (ProgressBar) findViewById(R.id.progressBar);
    imgPreview = (ImageView) findViewById(R.id.imgPreview);
    imgFace = (ImageView) findViewById(R.id.imgFace);
    btnCapturePicture = (Button) findViewById(R.id.btnCapturePicture);



    btnCapturePicture.setOnClickListener(new View.OnClickListener() {



        @Override
        public void onClick(View v) {

            captureImage();
        }

    });



    Intent i = getIntent();

    // boolean flag to identify the media type, image or video
    final boolean isImage = i.getBooleanExtra("isImage",true);
    previewMedia(isImage);
    if (fileUri != null)



      //call LivenessActivity
        startActivity(new Intent(UploadActivity.this,
        LivenessActivity.class));


    btnviewface = (Button) findViewById(R.id.btnviewface);
    btnviewface.setOnClickListener(new View.OnClickListener() {



        @Override
        public void onClick(View view) {

            Bundle extras = getIntent().getExtras();
            byte[] face = extras.getByteArray("image_best");

            //save byte[] in the sd card, make a folder
            try {
                Config.IMAGE_FACE = "/storage/emulated/0/Pictures/Android 
          File Upload/IMG_face.jpg";
                FileOutputStream stream = new FileOutputStream( 
          Config.IMAGE_FACE);
                stream.write(face);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

            Bitmap bmp = BitmapFactory.decodeByteArray(face, 0, 
          face.length);
            imgFace.setImageBitmap(bmp);
            previewMedia(isImage);
            new UploadFileToServer(Config.IMAGE_DOC, 
        Config.IMAGE_FACE).execute();

        }

    } );

LivenessActivity:

@Override
public Detector.DetectionType onDetectionSuccess(DetectionFrame validFrame) {

    FaceIDDataStruct dataStruct = mDetector.getFaceIDDataStruct();
    if (dataStruct != null) {
        face = dataStruct.images.get("image_best");

        Intent intent = new Intent(LivenessActivity.this, UploadActivity.class);
        //facefileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
        //intent.putExtra("filePath", facefileUri.getPath());
        intent.putExtra("image_best",face);
        setResult(PAGE_INTO_LIVENESS, intent);

        startActivity(intent);

    }

    if (face == null) {
        face = validFrame.getCroppedFaceImageData();
    }//do something with liveness face
return DetectionType.DONE;

}

Answer 1

删除 LivenessActivity 中的 startActivity 而不是此调用 finish() 或 LivenessActivity.this.finish()

@Override
public Detector.DetectionType onDetectionSuccess(DetectionFrame validFrame) {

    FaceIDDataStruct dataStruct = mDetector.getFaceIDDataStruct();
    if (dataStruct != null) {
        face = dataStruct.images.get("image_best");

        Intent intent = new Intent(LivenessActivity.this, UploadActivity.class);
        //facefileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
        //intent.putExtra("filePath", facefileUri.getPath());
        intent.putExtra("image_best",face);
        setResult(PAGE_INTO_LIVENESS, intent);

        startActivity(intent); // Remove this
        finish(); // LivenessActivity.this.finish()

    }

    if (face == null) {
        face = validFrame.getCroppedFaceImageData();
    }//do something with liveness face
return DetectionType.DONE;

}

如何避免重复拍摄图像

how to avoid image captured repeatedly

java

android

face-recognition

android-studio