Question

大家好我在mItems.add（）中遇到问题它需要参数int和Collection类型。我给参数作为int并传递一些字符串值。我不明白为什么添加时出错。

private List mItems; // ListView项目列表

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // initialize the items list
        mItems = new ArrayList<ListViewItem>();
        Resources resources = getResources();
        DBHandler dbh = new DBHandler(getContext());
        String friend_name, friend_status,friend_date_time,friend_fb_id;
        String fb_url;
        Cursor cursor = dbh.readAllFriends(dbh);
        int a=0;
        while(cursor.moveToNext()){
            friend_name                 = cursor.getString(cursor.getColumnIndex(TableInfo.F_USER_NAME));
            friend_status           =   cursor.getString(cursor.getColumnIndex(TableInfo.F_USER_STATUS));
            friend_date_time    =   cursor.getString(cursor.getColumnIndex(TableInfo.F_DATE));
            friend_fb_id                =   cursor.getString(cursor.getColumnIndex(TableInfo.F_FACEBOOK_ID));
            fb_url="https://graph.facebook.com/"+friend_fb_id+"/picture?type=large";
            mItems.add(a, fb_url,friend_name,friend_status,friend_date_time);
        }
        cursor.close();

Answer 1

你做错了。喜欢

ListViewItem item =new ListViewItem(a, fb_url,friend_name,friend_status,friend_date_time);

mItems.add(item );

您应在ListViewItem

上添加mItems ArrayList对象

Answer 2

在add（）参数中应该是ListViewItem类型，所以在add（）中传递ListViewItem的引用。

Answer 3

最后在你的while循环中进行以下更改

更改

mItems.add(a, fb_url,friend_name,friend_status,friend_date_time);

要

ListViewItem obj=new ListViewItem(a, fb_url,friend_name,friend_status,friend_date_time);
mList.add(obj);

在ListViewItem类中添加构造函数

ListViewItem(a, fb_url,friend_name,friend_status,friend_date_time);
{

}

希望这有帮助。

Add方法中ListFragment中的Listview错误

3 个答案: