android.view.ViewGroup$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams

LinearLayout layout = (LinearLayout) mInflater.inflate(
                    R.layout.cell_check_item, null);
            LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
                    UPDeviceInfo.getDeviceWidth(), LayoutParams.WRAP_CONTENT);
            rootLayout.addView(convertView, param);

我希望手动设置layout的宽度，结果就报错（虽然很小的几率报错）

java.lang.ClassCastException: android.view.ViewGroup$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams

 

解决方法：换成从原来的view中获取LayoutParams，而不是新建一个LayoutParams

LinearLayout.LayoutParams param = (android.widget.LinearLayout.LayoutParams) checkLayout
                    .getLayoutParams();
            param.width = UPDeviceInfo.getDeviceWidth();

看来，当一个View已经有了LayoutParams，最好不要添加一个新的LayoutParams。