Android Camera2 API扩展预览
Android Camera2 API扩展预览
提问于 2017-01-20 06:15:15
我正在使用Google示例项目，但我似乎无法在不拉伸的情况下让预览工作。
public void setAspectRatio(int width, int height) {
if (width < 0 || height < 0)
{
throw new IllegalArgumentException("Size cannot be negative.");
}
mRatioWidth = width;
mRatioHeight = height;
requestLayout();
}我试过在AutoFitTextureView类上物理改变宽高比，这会使它全屏显示，但会导致它拉伸。
有没有人想出一个成功的实现方法？
回答 1
Stack Overflow用户
发布于 2017-06-02 16:17:11
您需要修改setUpCameraOutputs方法。修改以下行
previously--->
Size largest = Collections.max(
Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)),
new CompareSizesByArea());已修改->
largest =getFullScreenPreview(map.getOutputSizes(ImageFormat.JPEG),width,height);previously--->
mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class),
rotatedPreviewWidth, rotatedPreviewHeight, maxPreviewWidth,
maxPreviewHeight, largest);modified---->
mPreviewSize = getFullScreenPreview(map.getOutputSizes(SurfaceTexture.class),
width, height);获得全屏预览的方法如下：
private Size getFullScreenPreview(Size[] outputSizes, int width, int height) {
List<Size> outputSizeList = Arrays.asList(outputSizes);
outputSizeList = sortListInDescendingOrder(outputSizeList); //because in some phones available list is in ascending order
Size fullScreenSize = outputSizeList.get(0);
for (int i = 0; i < outputSizeList.size(); i++) {
int orginalWidth = outputSizeList.get(i).getWidth();
int orginalHeight = outputSizeList.get(i).getHeight();
float orginalRatio = (float) orginalWidth / (float) orginalHeight;
float requiredRatio;
if (width > height) {
requiredRatio = ((float) width / height); //for landscape mode
if ((outputSizeList.get(i).getWidth() > width && outputSizeList.get(i).getHeight() > height)) {
// because if we select preview size hire than device display resolution it may fail to create capture request
continue;
}
} else {
requiredRatio = 1 / ((float) width / height); //for portrait mode
if ((outputSizeList.get(i).getWidth() > height && outputSizeList.get(i).getHeight() > width)) {
// because if we select preview size hire than device display resolution it may fail to create capture request
continue;
}
}
if (orginalRatio == requiredRatio) {
fullScreenSize = outputSizeList.get(i);
break;
}
}
return fullScreenSize;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/41752733
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