Question

我制作了自定义视图。如果我将视图添加到布局XML文件中，并将高度设置为fill_parent“specSize”返回0.为什么？

代码：

    @Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int measuredHeight = 90;

        int specMode = MeasureSpec.getMode(heightMeasureSpec);
        int specSize = MeasureSpec.getSize(MeasureSpec.getMode(heightMeasureSpec));

        if(specMode != MeasureSpec.UNSPECIFIED){
         measuredHeight = specSize;
        }
        setMeasuredDimension(60, measuredHeight);
}

有谁知道我如何获得fill_parent的高度？

Answer 1

你不需要在调用'getSize'时调用MeasureSpec.getMode整个测量规范的想法是结合测量方式（知道为Spec）和相关的大小。请参阅MeasureSpec.makeMeasureSpec方法的文档。正确的代码如下所示：

int widthSpec = MeasureSpec.getMode(widthMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);

Answer 2

正确的代码是：

int specMode = MeasureSpec.getMode(heightMeasureSpec);     ----This was already correct
int specSize = MeasureSpec.getSize(heightMeasureSpec);     ----This is corrected.

Android：onMeasure（）的问题

2 个答案: