Question

我使用GridView创建了当前周的视图。我使用BaseAdapter生成GridView。

这就是我给GridView

赋值的方法

        ArrayList<WeekCellItem> weekCellItems = getData(scheduleListdto);
    gridview1.setAdapter(new WeekAdapter(getApplicationContext(),weekCellItems));

当我点击CurrentItem上的每个单元格时，我需要GridView位置。

我为onItemClickListener

撰写了GridView

gridview1.setOnItemClickListener(new OnItemClickListener() {

        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            Object o= gridview1.getItemAtPosition(arg2);
            Log.e("", "hhh");
        }
    });

我将对象'o'视为null。

（编辑）

我的weekAdapter

public class WeekAdapter extends BaseAdapter
{
Context mycontext;
ArrayList<String>weekHeads;
ArrayList<WeekCellItem> weekCellItems;
LayoutInflater inflater;
public WeekAdapter(Context c, ArrayList<WeekCellItem> items, ArrayList<String> obj)
{
    weekCellItems=items;
    weekHeads=obj;
    mycontext=c;
    inflater = LayoutInflater.from(c);
}
public int getCount() {
    // TODO Auto-generated method stub
    return weekCellItems.size();
}

public Object getItem(int arg0) {
    // TODO Auto-generated method stub
    return null;
}

public long getItemId(int arg0) {
    // TODO Auto-generated method stub
    return 0;
}

public View getView(int pos, View convertview, ViewGroup parent) {
    // TODO Auto-generated method stub
    viewHolder holder = new viewHolder();
    if(convertview==null)
    {
        convertview = inflater.inflate(R.layout.weekly_layout, null);
        holder.tv = (TextView) convertview.findViewById(R.id.textweeklylayout);
        convertview.setTag(holder);
    }
    else
        holder=(viewHolder)convertview.getTag();
    return convertview;
}
private static class viewHolder
{
    TextView tv;
}}

Answer 1

您需要实现适配器的getItem()方法。 gridview.getItemAtPosition()轮流调用适配器的getItem() - 方法。

您的WeekAdapter的getItem()返回null。那就是问题所在。它应该是：

public Object getItem(int arg0) {
    return weekCellItems.get(arg0); 
}

Answer 2

添加以下代码。

public Object getItem(int arg0) {
    if (weekCellItems == null || weekCellItems.size() == 0)
        return null;

    return weekCellItems.get(arg0); 
}

为什么：您正在实施自定义适配器，因此您需要根据需要修改getItem（）。

无法从gridView获取对象

2 个答案: