自定义view学习2-1（课后练习）

最新推荐文章于 2024-06-03 12:18:30 发布

冯昕睿feng

最新推荐文章于 2024-06-03 12:18:30 发布

阅读量244

点赞数

CC 4.0 BY-SA版权

分类专栏： android

本文链接：https://blog.youkuaiyun.com/qq_33413264/article/details/79554798

android 专栏收录该内容

236 篇文章

订阅专栏

本文介绍了一种自定义的SquareImageView组件实现方法，该组件能够确保图片在不同尺寸下保持为正方形显示，通过重写onMeasure方法来调整宽高一致。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

感觉hencoder有点烂尾了呀，课程地址

http://hencoder.com/ui-2-1/

http://hencoder.com/ui-2-2/

http://hencoder.com/ui-2-3/

上代码

@SuppressLint("AppCompatCustomView")
public class Sample01SquareImageView extends ImageView {
    public Sample01SquareImageView(Context context) {
        super(context);
    }

    public Sample01SquareImageView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public Sample01SquareImageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        int measuredWidth = getMeasuredWidth();
        int measuredHeight = getMeasuredHeight();
        if (measuredWidth > measuredHeight) {
            measuredWidth = measuredHeight;
        } else {
            measuredHeight = measuredWidth;
        }
        setMeasuredDimension(measuredWidth, measuredHeight);
    }
}