Android Image Capture 功能无法再次使用

Question

我制作了一个应用程序，每隔一分钟捕获一次图像并将其上传到服务器。 该应用程序在手机上运行良好，但当我在平板电脑上运行相同的应用程序时，它会捕获图像并上传一次；下次它显示黑屏。

我现在该怎么办？

Answer 1

我找到了这个的解决方案。我的相机无法在预览时设置参数。 所以我找到了一个很好的功能来设置平板电脑的相机参数。

private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
    // TODO Auto-generated method stub
    final double ASPECT_TOLERANCE = 0.05;
    double targetRatio = (double) w / h;
    if (sizes == null) return null;

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

    int targetHeight = h;

    // Try to find an size match aspect ratio and size
    for (Size size : sizes) {
    double ratio = (double) size.width / size.height;
    if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
    if (Math.abs(size.height - targetHeight) < minDiff) {
    optimalSize = size;
    minDiff = Math.abs(size.height - targetHeight);
    }
    }

    // Cannot find the one match the aspect ratio, ignore the requirement
    if (optimalSize == null) {
    minDiff = Double.MAX_VALUE;
    for (Size size : sizes) {
    if (Math.abs(size.height - targetHeight) < minDiff) {
    optimalSize = size;
    minDiff = Math.abs(size.height - targetHeight);
    }
    }
    }
    return optimalSize;
}