Cursor.getType() API < 11 问题

Question

我正在关注@JuanSánchez 建议的answer，但我遇到了一个问题。

我的问题是在尝试将 android.database.Cursor 对象 (c) 转换为 CursorWrapper 时出现 ClassCastException。更具体地说，代码行是CursorWrapper cw = (CursorWrapper)c;。

        CursorWindow cursorWindow = null;
        int cursorPosition = 0;
        if (android.os.Build.VERSION.SDK_INT < 11) {
            CursorWrapper cw = (CursorWrapper)c;
            Class<?> cursorWrapper = CursorWrapper.class;
            Field mCursor = null;
            try {
                mCursor = cursorWrapper.getDeclaredField("mCursor");
                mCursor.setAccessible(true);
                AbstractWindowedCursor abstractWindowedCursor = (AbstractWindowedCursor)mCursor.get(cw);
                cursorWindow = abstractWindowedCursor.getWindow();
                cursorPosition = abstractWindowedCursor.getPosition();
            } catch (NoSuchFieldException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IllegalArgumentException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }

如有任何帮助，我将不胜感激。

Answer 1

解决了。超级简单。

换掉下面几行。

交换 CursorWrapper cw = (CursorWrapper)cursor;

发给 CursorWrapper cw = new CursorWrapper(cursor);