我正在使用Google示例项目,但似乎无法在不延伸的情况下使预览工作。
public void setAspectRatio(int width, int height) {
if (width < 0 || height < 0)
{
throw new IllegalArgumentException("Size cannot be negative.");
}
mRatioWidth = width;
mRatioHeight = height;
requestLayout();
}
我尝试在AutoFitTextureView类上实际更改宽高比,这使它全屏显示,但会使其拉伸。
有没有人想出这个的成功实施?
答案 0 :(得分:1)
您需要修改setUpCameraOutputs方法。修改以下行
<强>先前---&GT; 强>
Size largest = Collections.max(
Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)),
new CompareSizesByArea());
<强>改性---&GT; 强>
largest =getFullScreenPreview(map.getOutputSizes(ImageFormat.JPEG),width,height);
<强>先前---&GT; 强>
mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class),
rotatedPreviewWidth, rotatedPreviewHeight, maxPreviewWidth,
maxPreviewHeight, largest);
<强>改性----&GT; 强>
mPreviewSize = getFullScreenPreview(map.getOutputSizes(SurfaceTexture.class),
width, height);
获取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;
}