Android ImageView高度固定，宽度按比例自适应显示

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        如图所示，需要高度固定死，宽度需要根据比例来自适应显示，于是找了资料，通过自定义view实现，重写onMeasure方法：

public class ResizableImageView extends androidx.appcompat.widget.AppCompatImageView {

    public ResizableImageView(Context context) {

        super(context);

}

    public ResizableImageView(Context context, AttributeSet attrs) {

        super(context, attrs);

}

    @Override

    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        Drawable d = getDrawable();

        if (d != null) {

            // ceil not round - avoid thin vertical gaps along the left/right edges

            int width = View.MeasureSpec.getSize(widthMeasureSpec);

            //高度根据使得图片的宽度充满屏幕计算而得

            int height = (int) Math.ceil((float) width * (float) d.getIntrinsicHeight() / (float) d.getIntrinsicWidth());

            setMeasuredDimension(width, height);

        } else {

            super.onMeasure(widthMeasureSpec, heightMeasureSpec);

}

}

}