从列表中获取listItem数据

Question

我讨厌由简单的光标适配器创建的列表：

Cursor c = myDbHelper.rawQ(select);
    startManagingCursor(c);

    // the desired columns to be bound
    String[] columns = new String[] { "Books.BookTitle",
            "Publishers.Publisher" };
    // the XML defined views which the data will be bound to
    int[] to = new int[] { R.id.ISBN_entry, R.id.Title_entry };

    // Getting results into our listview
    try {
        SimpleCursorAdapter mAdapter = new SimpleCursorAdapter(this,
                R.layout.listlayout, c, columns, to);
        this.setListAdapter(mAdapter);
    } catch (Exception e) {

    }

列表涉及的布局是两个简单的文本视图。

我想要做的是创建一个侦听器，

 @Override
protected void onListItemClick(ListView l, View v, int position, long id) { 

我失败的部分是检索特定条目（行）的 BookTitle 部分，以便重新查询数据库并使用 AlertDialog.Builder 呈现数据。

当我尝试这样做时：

 String selection = l.getItemAtPosition(position).toString(); 

我只得到 android.database.sqlite SQLiteCursor@44f99e80 并且我对应该如何完成这件事感到相当困惑（我知道为什么它会崩溃；不明白应该如何正确完成它。

atm 完整代码：

...
Cursor c = myDbHelper.rawQ(select);
    startManagingCursor(c);

    // the desired columns to be bound
    String[] columns = new String[] { "Books.BookTitle",
            "Publishers.Publisher" };
    // the XML defined views which the data will be bound to
    int[] to = new int[] { R.id.ISBN_entry, R.id.Title_entry };

    // Getting results into our listview
    try {
        SimpleCursorAdapter mAdapter = new SimpleCursorAdapter(this,
                R.layout.listlayout, c, columns, to);
        this.setListAdapter(mAdapter);
    } catch (Exception e) {

    }



}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
 // TODO Auto-generated method stub
 //super.onListItemClick(l, v, position, id);
 String selection = l.getItemAtPosition(position).toString();  
 new AlertDialog.Builder(v.getContext())
 .setTitle("Title")
 .setMessage(selection)
 .setPositiveButton(android.R.string.ok, null)
 .show();
} }

Answer 1

尝试这样的事情......

Cursor theCursor = ((SimpleCursorAdapter)((ListView)l).getAdapter()).getCursor();
String selection = theCursor.getString(theCursor.getColumnIndex("Books.BookTitle"));

Answer 2

只需从光标获取数据即可：

 l.getItemAtPosition(position).getString(0); // it might be 1

请参阅此处。