I can't change android camera resolution

Question

This is my code in onPreviewFrame Method.

The frame that shows on the surfaceHolder is fine.

I Already set the resolution with this code at first

 mCameraParameter = mCamera.getParameters();
 mCameraParameter.setPreviewSize(100,150);
 mCameraParameter.setPreviewFrameRate(20);
 mCameraParameter.setPreviewFormat(PixelFormat.JPEG);
 mCamera.setParameters(mCameraParameter);

but the picture that image get is 640 * 480

I wonder why i can't change the preview resolution.

        public void onPreviewFrame(byte[] data, Camera camera) {
        Log.e("PreviewCallBack", "Preview");


        Camera.Parameters parameters = camera.getParameters();
        Log.e("Picture Size", "width : " + parameters.getPreviewSize().width);
        Log.e("Picture Size", "height : " + parameters.getPreviewSize().height);
        Log.e("Array Size", "data.length : " + data.length);
        YuvImage image = new YuvImage(data, parameters.getPreviewFormat(),
                parameters.getPreviewSize().width,parameters.getPreviewSize().height, null);


        File file = new File(Environment.getExternalStorageDirectory()
                .getPath() + "/"+/*System.currentTimeMillis()*/"out.jpg");

        FileOutputStream filecon = null;

        try {
            filecon = new FileOutputStream(file);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }


        image.compressToJpeg(
                new Rect(0, 0, image.getWidth(), image.getHeight()), 90,
                filecon);
    }
};

Answer 1

Maybe you are trying to set an unsupported preview size. Better call " getSupportedPreviewSizes() " and check if the preview size you want to set is supported by your device before calling setPreviewSize() .

Answer 2

我认为您应该调用setPictureSize()来设置图片本身的大小（而不是预览）。