相关疑难解决方法(0)

我的SurfaceView实现Camera.PreviewCallback&的子类SurfaceHolder.Callback.

private SurfaceHolder mHolder;
private Camera mCamera;

private final FPSCounter fpscounter = new FPSCounter();

public MySurfaceView(Context context, AttributeSet attrs) {
    super(context, attrs);
    mHolder = getHolder();
    mHolder.addCallback(this);
}

@Override
public void onPreviewFrame(byte[] data, Camera camera) {
    fpscounter.logFrame();
    Log.d("fps", String.valueOf(fpscounter.getLastFrameCount()));
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    synchronized (this) {
        mCamera.stopPreview();

        Camera.Parameters parameters = mCamera.getParameters();
        parameters.setRecordingHint(true);
        parameters.setPreviewFormat(ImageFormat.NV21);

        mCamera.setParameters(parameters);

        try {
            mCamera.setPreviewDisplay(holder);
            mCamera.setPreviewCallback(this);
            mCamera.startPreview();
        } catch (IOException e) {
            e.printStackTrace();
        } …