我知道这个主题在SO上出现了很多次,但是我无法让任何解决方案起作用。我正在构建一个照相亭类型应用程序,除了相机的实时视图失真(图像从上到下拖动)之外,每件事情都正常工作,这会影响最终结果,因为叠加不会仅仅因为相机预览而失真。图像也以正确的宽高比保存。贝娄是代码,如果需要,我可以发布更多。
Parameters params = camera.getParameters();
List<Camera.Size> supportedPreviewSizes = params.getSupportedPreviewSizes();
Camera.Size camPreviewSize = getOptimalPreviewSize(supportedPreviewSizes, width , height);
Log.d(TAG+"--",height +" : " + width);//display height and width
Log.d(TAG+"--",camPreviewSize.height +" : " + camPreviewSize.width);
params.setPreviewSize(camPreviewSize.width ,camPreviewSize.height);
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
计算预览尺寸
private Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int w, int h) {
final double ASPECT_TOLERANCE = 0.1;
double targetRatio=(double)h / w;
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;
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) {
optimalSize = size;
minDiff = Math.abs(size.height - targetHeight);
}
}
}
return optimalSize;
}
更改params.setPreviewSize()
的值似乎无效
答案 0 :(得分:1)
为了回答我自己的问题,在开始相机预览之前我错过了一行。 camera.setParameters(params);
所以我的第一个块应该是这样的。
Parameters params = camera.getParameters();
List<Camera.Size> supportedPreviewSizes = params.getSupportedPreviewSizes();
Camera.Size camPreviewSize = getOptimalPreviewSize(supportedPreviewSizes, width , height);
Log.d(TAG+"--",height +" : " + width);//display height and width
Log.d(TAG+"--",camPreviewSize.height +" : " + camPreviewSize.width);
params.setPreviewSize(camPreviewSize.width ,camPreviewSize.height);
camera.setParameters(params); //This line was missing
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();