Android获取Camera支持的分辨率

Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
for(int cameraId=0; cameraId<Camera.getNumberOfCameras(); cameraId++)
{
Camera.getCameraInfo( cameraId, cameraInfo);
Camera camera = Camera.open(cameraId);
Camera.Parameters params = camera.getParameters();
List<Camera.Size> previewSIzes = params.getSupportedVideoSizes(_);
logger.info("Video supported sizes: " + cameraSizesToString( previewSizes));
}

因为我们直接log输出previewSIzes的话，格式不是我们能看懂的整数，
所以我写了个cameraSizesToString()转化成类似640x420的格式

public static String cameraSizeToSting(Iterable<Camera.size> sizes)
{
StringBuilder s = new StringBuilder();
for (Camera.Size size : sizes)
{
if (s.length() != 0)
s.append(",");
s.append(size.width).append('x').append(size.height);
}
return s.toString();
}