如何获得像Instagram一样1:1比例的Android Camera2？

我的问题很简单：

如何获得安卓系统android.hardware.Camera2像 Instagram 一样 1:1 比例且不变形？

我用 GoogeSamples 项目进行了测试android-Camera2Basic https://github.com/googlesamples/android-Camera2Basic。但是当我以 1:1 的比例更改预览时，图像会变形。有人对此有什么想法吗？

谢谢@CommonsWare。

我按照你的建议使用负边距（顶部和底部）并且它有效。

为此，我只需更新自动调整纹理视图 https://github.com/googlesamples/android-Camera2BasicGoogeSamples 项目android-Camera2Basic https://github.com/googlesamples/android-Camera2Basic这边走：

public class AutoFitTextureView extends TextureView {

    //...
    private boolean mWithMargin = false;

    //...

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, widthMeasureSpec);
        int width = MeasureSpec.getSize(widthMeasureSpec);
        int height = MeasureSpec.getSize(heightMeasureSpec);
        int margin = (height - width) / 2;

        if(!mWithMargin) {
            mWithMargin = true;
            ViewGroup.MarginLayoutParams margins = ViewGroup.MarginLayoutParams.class.cast(getLayoutParams());
            margins.topMargin = -margin;
            margins.bottomMargin = -margin;
            margins.leftMargin = 0;
            margins.rightMargin = 0;
            setLayoutParams(margins);
        }

        if (0 == mRatioWidth || 0 == mRatioHeight) {
            setMeasuredDimension(width, height);
        } else {
            if (width < height) {
                setMeasuredDimension(width, width * mRatioHeight / mRatioWidth);
            } else {
                setMeasuredDimension(height * mRatioWidth / mRatioHeight, height);
            }
        }
    }
}