ImageView的与动态宽度方？ [英] ImageView be a square with dynamic width?

问题描述

我有内部ImageViews一个GridView。我有3人各行。我可以正确设置WRAP_CONTENT和scaleType = CENTER_CROP的宽度，但我不知道如何设置ImageView的大小是一个正方形。这是我做了到现在为止，这似乎是确定的，除了高度，那就是静：

I have a GridView with ImageViews inside. I have 3 of them for each row. I can set correctly the width with WRAP_CONTENT and scaleType = CENTER_CROP, but I don't know how to set the ImageView's size to be a square. Here's what I did until now, it seems to be ok except the height, that is "static":

imageView = new ImageView(context);     
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(GridView.LayoutParams.WRAP_CONTENT, 300));

我的适配器内部做这件事。

I'm doing it inside an adapter.

推荐答案

最好的办法是继承的ImageView 自己，覆盖措施通：

The best option is to subclass ImageView yourself, overriding the measure pass:

public class SquareImageView  extends ImageView {

  ...

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

    int width = getMeasuredWidth();
    setMeasuredDimension(width, width);
  }

  ...

}

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