缩放后getWidth不返回不同的值 [英] getWidth not returning different value after scaling

问题描述

我正在尝试查找使用setScaleX时缺少的内容.

I'm trying to find what I'm missing when using setScaleX.

    final ImageView iv = (ImageView) findViewById(R.id.imageView);
    ViewTreeObserver vto = iv.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            // Start at 60
            Log.d("test", "Before"+String.valueOf(iv.getWidth()));
            iv.setScaleX((float) .5);
            // Still at 60 after scale
            Log.d("test", "After"+String.valueOf(iv.getWidth()));
        }

    });

我认为宽度将变为30.缩放后如何获得宽度的值?

I would of thought the width would have become 30. How do I get the value of the width after scaling?

推荐答案

您可以将其乘以scale x or y

 final ImageView iv = (ImageView) findViewById(R.id.imageView);
    ViewTreeObserver vto = iv.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            // Start at 60
            Log.d("test", "Before"+String.valueOf(iv.getWidth()* iv.getScaleX()));
            iv.setScaleX((float) .5);
            // Still at 60 after scale
            Log.d("test", "After"+String.valueOf(iv.getWidth()* iv.getScaleX()));
        }

    });

这篇关于缩放后getWidth不返回不同的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！