Question

我正在开发一个自定义相机应用程序，我面临着设置相机预览尺寸的问题。问题是相机预览不会保持纵横比，因此预览看起来会拉伸到两侧。

我用来计算最佳尺寸的代码：

private Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int w, int h) {


        final double ASPECT_TOLERANCE = 1;
        double targetRatio=(double)w / h; 

        if (sizes == null){
            return null;
        }

        Camera.Size optimalSize = null;
        double minDiff = Double.MAX_VALUE;

        int targetHeight = h;

        for (Camera.Size size : sizes) {

            double ratio = (double) size.width / size.height;
            Log.d("Test", "Ration: " + Math.abs(ratio - targetRatio));
            if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) {
                continue;
            }

            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }

        if (optimalSize == null) {

            minDiff = Double.MAX_VALUE;
            for (Camera.Size size : sizes) {
                if (Math.abs(size.height - targetHeight) < minDiff) {
                    Log.d("Test", "MATCFH!");
                    optimalSize = size;
                    minDiff = Math.abs(size.height - targetHeight);
                }
            }
        }



        return optimalSize;
    }

我一直在努力争取这一天，但找不到最佳解决方案。任何建议将不胜感激！

Answer 1

您说得对，更改相机预览尺寸可能无法保留纵横比。要使预览显示看起来不错，您应该相应地调整预览surfaceView的大小。

相机预览尺寸问题

1 个答案: