当检测到面部时拍照

Question

我有以下的代码，我想要自动只拍摄一张照片时，一张脸被检测到。我已经实现了自动拍照，但它采取了许多没有时间处理的照片，因为它不断地检测到脸。我怎样才能每隔x分钟搜索一张脸，或者每隔x分钟拍一张照片？提前谢谢你。

FaceDetectionListener faceDetectionListener
= new FaceDetectionListener(){

    @Override
    public void onFaceDetection(Face[] faces, Camera camera) {

        if (faces.length == 0){
            prompt.setText(" No Face Detected! ");
        }else{
            //prompt.setText(String.valueOf(faces.length) + " Face Detected :) ");
              try{
                camera.takePicture(myShutterCallback,myPictureCallback_RAW, myPictureCallback_JPG);

               }
               catch(Exception e){

               }
        }


    }};

Answer 1

FaceDetectionListener faceDetectionListener
= new FaceDetectionListener(){

    private boolean processing = false;

    public void setProcessing(boolean processing) {
        this.processing = processing;
    }

    @Override
    public void onFaceDetection(Face[] faces, Camera camera) {
        if (processing) return;

        if (faces.length == 0){
            prompt.setText(" No Face Detected! ");
        }else{
            //prompt.setText(String.valueOf(faces.length) + " Face Detected :) ");
              try{
                   camera.takePicture(myShutterCallback,myPictureCallback_RAW, myPictureCallback_JPG);
                   processing = true;
               }
               catch(Exception e){

               }
        }


    }};

然后，您可以在myShutterCallback中执行任何您想要的处理，并调用faceDetectionListener.setProcessing(false)来拍摄另一张照片。这将保证一次只拍一张照片。