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我的應用程序有一個列表視圖,它列出講座列表。StaleDataException:重建ListView時訪問關閉的光標錯誤
cursor = myDbHelper.getReadableDatabase().rawQuery(sql, null);
startManagingCursor(cursor);
adapter = new Lectures_Adapter(this,R.layout.menu_item,cursor,FROM,TO);
menuList.setAdapter(adapter);
在我的自定義接口的代碼是 - - 根據類型它們顏色編碼,我用它來做到這一點,自定義適配器是由下面的代碼稱爲
public class Lectures_Adapter extends SimpleCursorAdapter {
private Context appContext;
private int layout;
private Cursor mycursor;
public Lectures_Adapter(Context context, int layout, Cursor c, String[] from,int[] to) {
super(context, layout, c, from, to);
this.appContext=context;
this.layout=layout;
this.mycursor=c;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
View view = super.getView(position, convertView, parent);
try {
if (position > 0)
{
RelativeLayout rowFill = (RelativeLayout) convertView.findViewById(R.id.rowFill);
String title = mycursor.getString(1);
int myColor = 0;
int myPos = title.indexOf("Nursing");
int myPos2 = title.indexOf("Masterclass");
if (myPos >= 0)
{
myColor = Color.parseColor("#99FF66");
}
else if (myPos2 >= 0)
{
myColor = Color.parseColor("#FF99FF");
}
else
{
myColor = Color.parseColor("#FFFF66");
}
convertView.findViewById(R.id.rowFill).setBackgroundColor(myColor);
}
}catch(Exception e) {
}
if (convertView == null) {
LayoutInflater inflator = (LayoutInflater) this.appContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflator.inflate(this.layout,null);
} else {
convertView = (View) convertView;
}
return view;
}
}
我有一個按鈕,顯示一個對話框,該對話框提供了以四種不同方式重新排列Listview的選項。當他們選擇了我重新排序的選項使用下面的代碼列表視圖 -
Cursor newCursor = myDbHelper.getReadableDatabase().rawQuery(sqlStr, null);
adapter.changeCursor(newCursor);
adapter.notifyDataSetChanged();
這一切似乎工作正常,除非我重新排列和上面的代碼被調用,當它運行getView我得到以下錯誤'StaleDataException:訪問關閉遊標'。這顯然是因爲光標被關閉了,我做錯了什麼?