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

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.

So basically, if you are adding a view to another, you MUST set the LayoutParams of the view to the LayoutParams type that the parent uses, or you will get a runtime error.

 比如：<LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="wrap_content"  android:layout_height="wrap_content">    <FrameLayout android:id="@+id/FrameLayout01" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>若想在程式碼中動態改變FrameLayout的大小，應該這樣寫：FrameLayout frameLayout=(FrameLayout) convertView.findViewById(R.id.FrameLayout01);   LinearLayout.LayoutParams ff=new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, height); 

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