我有類似的情況 - 在list_view.setAdapter()上出現異常「java.lang.ClassCastException:android.widget.RelativeLayout $ LayoutParams」;
我已設法通過對頁腳和列表項使用相同的佈局來解決此問題。下面的代碼演示瞭如何在頁腳和項目中使用佈局「listview_row」。
這是 「listview_row.xml」 的內容:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/hs_line"
android:layout_alignParentLeft ="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<!-- TextView for list items -->
<TextView android:id="@+id/hs_line_textview"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_alignParentLeft="true"
/>
<!-- Button for footer -->
<Button android:id="@+id/hs_line_footer_action"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:visibility="gone"
android:layout_alignParentLeft="true"
/>
</RelativeLayout>
頁腳以這樣的方式初始化:
View v = View.inflate(pager.Activity, R.layout.listview_row, null);
View footer = (View) v.findViewById(R.id.listview_line);
//footer doesn't use TextView, it uses Button only. So, we hide TextView.
footer.findViewById(R.id.hs_line_textview).setVisibility(View.GONE);
footer.findViewById(R.id.hs_line_footer_action).setVisibility(View.VISIBLE)
...
list_view.addFooterView(footer);
MyAdapter<Item> adapter = new MyAdapter(context, getListItems());
list_view.setAdapter(adapter);
適配器:
public class MyAdapter<T> extends ArrayAdapter<T> {
private final ArrayList<T> _List;
private final LayoutInflater _Inflater;
public MyAdapter(Context context, ArrayList<T> srcList) {
super(context, 0, srcList);
_Inflater = LayoutInflater.from(context);
_List = srcList;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = _Inflater.inflate(R.layout.listview_row, null);
holder = new ViewHolder();
//item doesn't use Button, it uses TextView only
//Button is hidden by default (see xml)
holder.TextView = (TextView) convertView.findViewById(R.id.hs_line_textview);
} else {
holder = (ViewHolder) convertView.getTag();
}
//item initialization
.....
}
這不是理想的解決方案 - 只解決方法,當然。
你可以用XML發佈總代碼嗎? – Veer