android.database.CursorIndexOutOfBoundsException : Index -1 requested, 大小为 5

Question

请帮我解决这个问题

我的代码是

`final Cursor curr = dbhelper.getdatatomanagedata();
startManagingCursor(curr);
Integer colid = curr.getInt(0);
String colans = curr.getString(1);
objansMap = new HashMap<Integer, String>(); 
if (curr!=null)
{ 
 curr.moveToFirst();
 while(!curr.isAfterLast())
 {
    objansMap.put(colid, colans);
    curr.moveToNext();
 }}

Answer 1

你的代码必须是

final Cursor curr = dbhelper.getdatatomanagedata();
startManagingCursor(curr);
Integer colid;
String colans;
objansMap = new HashMap<Integer, String>(); 
if (curr!=null)
{ 
 curr.moveToFirst();
 while(!curr.isAfterLast())
 {  colid = curr.getInt(0);
    colans = curr.getString(1);
    objansMap.put(colid, colans);
    curr.moveToNext();
 }}

当游标返回时，它的默认索引是 -1，您必须使用 moveToFirst() 移动到它的第 0 个索引。

另一种使用代码的方式

if(cur.moveToFirst()){
        do{
            //YOUR CODE HERE 
           objansMap.put(curr.getInt(0), curr.getString(1));               
        }while(cur.moveToNext());
    }

快乐编码:)