android - Android UI design automatic ImageView re-size

Question

An ImageView gets an image and wraps the content so if the image has dimensions like 100x100, the ImageView has the same dimensions. I want to specify only the layout_height of this ImageView and when it matches the image to re-size properly the layout_width of the ImageView.

Here is an example:

image size = 100x100;

ImageView's layout_height = 200;

ImageView's layout_width should become 200 not 100.

Is this possible?

Answer 1

您需要创建一个自定义 ImageView 并覆盖 onMeasure 以使视图始终为正方形。

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

    SQUARE_DIMENSION  = this.getMeasuredHeight(); // whatever height you want here

    this.setMeasuredDimension(SQUARE_DIMENSION, SQUARE_DIMENSION);
}