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);

我希望手動設置layout的寬度，結果就報錯（雖然很小的幾率報錯）

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

 

解決方法：換成從原來的view中獲取LayoutParams，而不是新建一個LayoutParams

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

看來，當一個View已經有了LayoutParams，最好不要添加一個新的LayoutParams。