我试图为我的ListView创建自定义适配器,因为列表中的每个项目都可以具有不同的视图(链接,切换或单选组),但是当我尝试运行使用ListView的Activity时收到错误消息,并且该应用程序停止。该应用程序针对Android 1.6平台。
代码:
public class MenuListAdapter extends BaseAdapter {
private static final String LOG_KEY = MenuListAdapter.class.getSimpleName();
protected List<MenuItem> list;
protected Context ctx;
protected LayoutInflater inflater;
public MenuListAdapter(Context context, List<MenuItem> objects) {
this.list = objects;
this.ctx = context;
this.inflater = (LayoutInflater)this.ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Log.i(LOG_KEY, "Position: " + position + "; convertView = " + convertView + "; parent=" + parent);
MenuItem item = list.get(position);
Log.i(LOG_KEY, "Item=" + item );
if (convertView == null) {
convertView = this.inflater.inflate(item.getLayout(), null);
}
return convertView;
}
@Override
public boolean areAllItemsEnabled() {
return false;
}
@Override
public boolean isEnabled(int position) {
return true;
}
@Override
public int getCount() {
return this.list.size();
}
@Override
public MenuItem getItem(int position) {
return this.list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getItemViewType(int position) {
Log.i(LOG_KEY, "getItemViewType: " + this.list.get(position).getLayout());
return this.list.get(position).getLayout();
}
@Override
public int getViewTypeCount() {
Log.i(LOG_KEY, "getViewTypeCount: " + this.list.size());
return this.list.size();
}
}
我收到的错误:
java.lang.ArrayIndexOutOfBoundsException
at android.widget.AbsListView$RecycleBin.addScrapView(AbsListView.java:3523)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1158)
at android.widget.ListView.onMeasure(ListView.java:1060)
at android.view.View.measure(View.java:7703)
我确实知道该应用程序正在从中返回,getView
并且一切似乎都井井有条。
任何可能导致此问题的想法将不胜感激。
谢谢,
-担
嗨,丹,您确定getCount的元素总数要显示在ListView上吗???public int getCount(){return this.list.size(); }
—
Jorgesys
他们无法提供较少描述性的错误消息……
—
JoeyJ 2012年