具有正确宽高比的android textureview全屏预览 [英] android textureview full screen preview with correct aspect ratio

问题描述

我一直在使用来自Google的camera2 api演示，不幸的是该示例应用程序已构建环顾四周后，我可以确定这是由AutoFitTextureView覆盖了onMeasure()方法造成的，如下图所示:

I have been working with the camera2 api demo from google and unfortunately the sample application is built to display the textureview preview at approximately 70% of the screen height, after looking around I was able to determine that this was being caused by the AutoFitTextureView overriding the onMeasure() method as shown below:

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    int width = MeasureSpec.getSize(widthMeasureSpec);
    int height = MeasureSpec.getSize(heightMeasureSpec);
    if (0 == mRatioWidth || 0 == mRatioHeight) {
        setMeasuredDimension(width, height);
    } else {
        if (width < height * mRatioWidth / mRatioHeight) {
            setMeasuredDimension(width, width * mRatioHeight / mRatioWidth);
        } else {
            setMeasuredDimension(height * mRatioWidth / mRatioHeight, height);
        }
    }
}

我尝试通过在setMeasuredDimension(width, height);中设置正确的高度和宽度来更正此问题，这解决了高度问题，并从Textureview提供了全屏预览，但是纵横比在每个设备上都完全被破坏和扭曲了，这是什么?解决此问题的标准方法是什么?我发现Play商店中的许多应用都找到了解决此问题的方法，但还没有找到解决办法，任何帮助都将走很长一段路要走.

I attempted to correct this by setting the correct heights and widths in setMeasuredDimension(width, height);, this fixed the height issue and gave me a full screen preview from the textureview, however the aspect ratio is completely broken and warped on every device, what is the standard way of fixing this? I see many apps on the play store have found a way to solve this problem but havent been able to track down a fix, any help will go a long way, thanks.

推荐答案

我能够通过切换setMeasuredDimension();

I was able to fix the issue by switching setMeasuredDimension();

    int width = MeasureSpec.getSize(widthMeasureSpec);
    int height = MeasureSpec.getSize(heightMeasureSpec);
    if (0 == mRatioWidth || 0 == mRatioHeight) {
        setMeasuredDimension(width, height);
    } else {
        if (width < height * mRatioWidth / mRatioHeight) {
            setMeasuredDimension(height * mRatioWidth / mRatioHeight, height);
        } else {
            setMeasuredDimension(width, width * mRatioHeight / mRatioWidth);
        }
    }

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