Caused by: java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams

今天在项目中遇到这个问题。上网看看了看，发现也有很多网友遇到同样的问题。

简单google了几篇文章，发现了解决方法：

官方API有说明：

http://developer.android.com/reference/android/view/View.html#setLayoutParams%28android.view.ViewGroup.LayoutParams%29

public void setLayoutParams (ViewGroup.LayoutParams params)

Set the layout parameters associated with this view. These supply parameters to the parent of this view specifying how it should be arranged. There are many subclasses of ViewGroup.LayoutParams, and these correspond to the different subclasses of ViewGroup that are responsible for arranging their children.

Parameters

params	The layout parameters for this view, cannot be null

相信英语比我好的都大概看明白这段话的意思。重点是红色字体部分，

最上层（最顶层）的Layout不需要设定在此值 ，否则会报标题的错误.