从相机自动捕捉图像？

Question

我有 qrReader 应用程序，所以在 ActivityResult 中，如果我有响应我想要的内容，我会写到相机中，是否可以在意图进入相机并自动对焦后自动拍照？？（我应该有什么添加用于自动捕获）

        button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            IntentIntegrator intentIntegrator = new IntentIntegrator(activity);
            intentIntegrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);
            intentIntegrator.setPrompt("Scan");
            intentIntegrator.setCameraId(0);
            intentIntegrator.setBeepEnabled(false);
            intentIntegrator.setBarcodeImageEnabled(false);
            intentIntegrator.initiateScan();

        }
    });
}

@Override
protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
    final IntentResult result = IntentIntegrator.parseActivityResult(requestCode,resultCode,data);
    if(result!= null){
                if(result.getContents()==null){
                    Toast.makeText(getApplicationContext(),"you canceled the scanning",Toast.LENGTH_LONG).show();
                }
                else {
                    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    textView.setText(result.getContents());
                    startActivityForResult(intent, TAKE_PICTURE);



                }



    }

    super.onActivityResult(requestCode, resultCode, data);
}

Answer 1

添加以下代码：

写一个方法

public void capturePhoto() throws Exception { 
        mCamera.takePicture(shutterCallback, rawCallback, jpegCallback);
        Thread.sleep(WAIT_GENERIC);
        mCamera.stopPreview();
        mCamera.release();
    } 

然后在你的 onResult 中调用它

button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            IntentIntegrator intentIntegrator = new IntentIntegrator(activity);
            intentIntegrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);
            intentIntegrator.setPrompt("Scan");
            intentIntegrator.setCameraId(0);
            intentIntegrator.setBeepEnabled(false);
            intentIntegrator.setBarcodeImageEnabled(false);
            intentIntegrator.initiateScan();

        }
    });
}

@Override
protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
    final IntentResult result = IntentIntegrator.parseActivityResult(requestCode,resultCode,data);
    if(result!= null){
                if(result.getContents()==null){
                    Toast.makeText(getApplicationContext(),"you canceled the scanning",Toast.LENGTH_LONG).show();
                }
                else {
                    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    capturePhoto();
                    textView.setText(result.getContents());
                    startActivityForResult(intent, TAKE_PICTURE);



                }



    }

要在您的相机预览课中回答您的问题，请添加：

ShutterCallback shutterCallback = new ShutterCallback() {
        public void onShutter() {
            //           Log.d(TAG, "onShutter'd");
        }
    };

    PictureCallback rawCallback = new PictureCallback() {
        public void onPictureTaken(byte[] data, Camera camera) {
            //           Log.d(TAG, "onPictureTaken - raw");
        }
    };

    PictureCallback jpegCallback = new PictureCallback() {
        public void onPictureTaken(byte[] data, Camera camera) {
            new SaveImageTask().execute(data);
            resetCam();
            Log.d(TAG, "onPictureTaken - jpeg");
        }
};