java - 在android中的Listener中获取值

Question

我有一些这样的代码:

 final int height = 0; //I want to get this height after Predraw view
 view.addOnPreDrawListener(new OnPreDrawListener()
    {

        @Override
        public boolean onPreDraw()
        {
            int myHeight = itemLayout.getMeasuredHeight();
            height = myHeight; //this line has error
            return false;
        }
    });

问题是我如何从监听器获取值(尤其是原始类型)。总是显示

 Cannot refer to a non-final variable height inside an inner class defined in a different method 

然后我尝试将变量更改为final，它显示错误:

 The final local variable height cannot be assigned, since it is defined in an enclosing type

不知道为什么API很难用。

Answer 1

在onCreate(....)之前将其声明为global int myHeight;