如何在运行时更改maxFrameSize of JavaCameraView

Question

我有一个带有OpenCV的安卓应用程序，它应该能够在运行时改变JavaCameraView的帧大小。因为在交付的帧上进行了大量的处理，所以我在App上将帧的分辨率设置为320 x 280。我就是这样做的：

protected void onCreate(Bundle savedInstanceState) {
    cameraView = (JavaCameraView) findViewById(R.id.cam_view);
    cameraView.setMaxFrameSize(320, 280);
    cameraView.setCvCameraViewListener(this);

我创建了一个RadioButton组，在其中我可以为框架选择分辨率。这是我的密码；

resolutionChange = new Dialog(this);
    resolutionChange.requestWindowFeature(Window.FEATURE_NO_TITLE);
    resolutionChange.setContentView(com.finarx.opencv.camera.R.layout.resdialog);

    RadioGroup resChange = (RadioGroup) resolutionChange.findViewById(com.finarx.opencv.camera.R.id.resChange);
    resChange.setOnCheckedChangeListener(new OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(RadioGroup group,
                int checkedId) {
            if (checkedId == com.finarx.opencv.camera.R.id.lowest) {
                cameraView.setMaxFrameSize(320, 280);
                resolutionChange.dismiss();
            } else if (checkedId == com.finarx.opencv.camera.R.id.low) {
                cameraView.setMaxFrameSize(480, 320);
                resolutionChange.dismiss();
            } else if (checkedId == com.finarx.opencv.camera.R.id.vga) {
                cameraView.setMaxFrameSize(640, 480);
                resolutionChange.dismiss();
            } else if (checkedId == com.finarx.opencv.camera.R.id.higher) {
                cameraView.setMaxFrameSize(800, 600);
                resolutionChange.dismiss();
            } else if (checkedId == com.finarx.opencv.camera.R.id.highest) {
                cameraView.setMaxFrameSize(1280, 720);
                resolutionChange.dismiss();
            }
        }
    });

事实上，当我选择另一个分辨率时，框架的分辨率不会发生任何变化。当然，我也尝试重新启动cameraView对象。有什么我错过的吗？

Answer 1

最后我自己发现的。其实很简单，但有些事我没想过。我只需要重新启动我的cameraView对象。这是我的代码：

@Override
        public void onCheckedChanged(RadioGroup group,
                int checkedId) {
            if (checkedId == com.finarx.opencv.camera.R.id.lowest) {
                cameraView.setMaxFrameSize(320, 280);
                cameraView.disableView();
                cameraView.enableView();
                resolutionChange.dismiss();
            } else if (checkedId == com.finarx.opencv.camera.R.id.low) {
                cameraView.setMaxFrameSize(480, 320);
                cameraView.disableView();
                cameraView.enableView();
                resolutionChange.dismiss();
            } else if (checkedId == com.finarx.opencv.camera.R.id.vga) {
                cameraView.setMaxFrameSize(640, 480);
                cameraView.disableView();
                cameraView.enableView();
                resolutionChange.dismiss();
            } else if (checkedId == com.finarx.opencv.camera.R.id.higher) {
                cameraView.setMaxFrameSize(800, 600);
                cameraView.disableView();
                cameraView.enableView();
                resolutionChange.dismiss();
            } else if (checkedId == com.finarx.opencv.camera.R.id.highest) {
                cameraView.setMaxFrameSize(1280, 720);
                cameraView.disableView();
                cameraView.enableView();
                resolutionChange.dismiss();
            }
        }