即使删除所有项目，Android ListView也未清除

更新：无论是否使用调试模式，我都可以在Galaxy S2上复制此问题，但在Emulator上永远不会

我在ListView上使用了一个上下文菜单，它使用了CursorAdapter的自定义实现，让用户选择“全部删除”选项。选择此选项后，列表中显示的所有项目都将从数据库中永久删除，然后调用changeCursor。。在适配器上强制更新列表

然而，即使在从数据库中删除记录并调用changeCursor..之后，这些项仍然可见。只有项目分隔符消失。只有在我触碰清单上的某个地方后，这些项目才会被清除

当用户激活关联菜单时：

从数据库中删除并调用changeCursor..后：

我在ListView中遇到了另一个问题，我使用的是同一个ListView，所以这些问题可能是相关的？在数据库更新之后，是否有强制ListView重画的步骤？还是因为我在实施解决方案时犯了一个错误而没有自动发生？提前谢谢

下面是ListView的XML

bindView。。我的游标适配器的方法

这是我的onContextItemSelected。。方法，该方法来自包含ListView的活动

光标更改后，在适配器上调用notifyDataSetChanged以重新加载视图。 如果运行预蜂窝设备，则更好地使用

只是查看了代码。最好使用swapCursor，它会自动为您注册新的内容观察者和notifyDataSetChanged调用

来自CursorAdapter源代码

/**
 * Change the underlying cursor to a new cursor. If there is an existing cursor it will be
 * closed.
 * 
 * @param cursor The new cursor to be used
 */
public void changeCursor(Cursor cursor) {
    Cursor old = swapCursor(cursor);
    if (old != null) {
        old.close();
    }
}

/**
 * Swap in a new Cursor, returning the old Cursor.  Unlike
 * {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
 * closed.
 *
 * @param newCursor The new cursor to be used.
 * @return Returns the previously set Cursor, or null if there wasa not one.
 * If the given new Cursor is the same instance is the previously set
 * Cursor, null is also returned.
 */
public Cursor swapCursor(Cursor newCursor) {
    if (newCursor == mCursor) {
        return null;
    }
    Cursor oldCursor = mCursor;
    if (oldCursor != null) {
        if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
        if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
    }
    mCursor = newCursor;
    if (newCursor != null) {
        if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
        if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
        mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
        mDataValid = true;
        // notify the observers about the new cursor
        notifyDataSetChanged();
    } else {
        mRowIDColumn = -1;
        mDataValid = false;
        // notify the observers about the lack of a data set
        notifyDataSetInvalidated();
    }
    return oldCursor;
}

---

更改光标后，请尝试添加ActiveMembersAdapter AllMembersList.getAdapter.notifyDataSetChanged调用。Nikita是正确的，最好使用支持库中的光标适配器并调用swapCursor，而不是changeCursor@SaifuddinSarker，我也尝试了invalidateViews，但它对我无效。谢谢回复。notifyDataSetChanged的行为与对changeCursor的调用有什么不同吗？将检查并确认它是否解决了我的问题。我只针对IC和更新的设备。更新答案。notifyDataSetChanged是BaseAdapter的一种方法，从中扩展CursorAdapter，强制重新加载视图。谢谢，但我尝试在changeCursor之后调用notifyDataSetChanged。我也试着打电话给swapCursor。我仍然有完全相同的问题。@PritinTyagaraj在更改光标之前，删除后是否执行查询？您确定设置的光标为空吗？注销cursor.getCount并查看包含的行数。是的，我已确保相同的行数。databaseHelper.GetAllMembersForList方法实际上执行一个SELECT查询并为结果返回一个光标。我注意到的另一件奇怪的事情是，我无法在模拟器中复制它，但我可以在Galaxy S2上每次都复制它，无论是否处于调试模式

public View newView(Context context, Cursor cursor, ViewGroup parent) {
    LayoutInflater inflater = LayoutInflater.from(parent.getContext());
    View view = inflater.inflate(R.layout.view_list_item, parent, false);
    return view;
}

public void bindView(View view, Context context, Cursor cursor) {

        TextView whatTextView = (TextView) view.findViewById(R.id.item_what_text);
        whatTextView.setText(cursor.getString(1));
        TextView whenTextView = (TextView) view.findViewById(R.id.item_when_text);


        if(cursor.getInt(9) != 0) // DONE_FLAG = 1 (completed)
        {
            //Arrow visibility
            ImageView arrow = (ImageView)view.findViewById(R.id.list_item_arrow);
            arrow.setVisibility(View.INVISIBLE);

            //Text color
            whatTextView.setTextColor(Color.LTGRAY);
            whenTextView.setTextColor(Color.LTGRAY);

            //WHEN text
            whenTextView.setText(TimeCalculationHelper.getCompletedTimeString(cursor.getLong(2)));
        }
        else // DONE_FLAG = 0
        {
            //Arrow visibility
            ImageView arrow = (ImageView)view.findViewById(R.id.list_item_arrow);
            arrow.setVisibility(View.VISIBLE);

            //Text color
            whatTextView.setTextColor(Color.BLACK);
            whenTextView.setTextColor(Color.BLACK);

            //WHEN text
            whenTextView.setText(TimeCalculationHelper.getTimeRemainingString(cursor.getLong(2)));


        }
}

public boolean onContextItemSelected(MenuItem item)
    {
        AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
        ListView allRemindersList = (ListView)findViewById(R.id.all_reminders_list);

        switch (item.getItemId()) {
        case R.id.delete_item:
            //Delete the selected reminder from the database
            databaseHelper.deleteRowByID(info.id);

            //Refresh the main activity list
            ((ActiveRemindersAdapter) allRemindersList.getAdapter()).changeCursor(databaseHelper.getAllRemindersForList());
            return true;

        case R.id.delete_done:
            //Delete all reminders with DONE_FLAG = 1
            databaseHelper.deleteDoneReminders();

            //Refresh the main activity list
            ((ActiveRemindersAdapter) allRemindersList.getAdapter()).changeCursor(databaseHelper.getAllRemindersForList());
        }
        return false;
    }

/**
 * Change the underlying cursor to a new cursor. If there is an existing cursor it will be
 * closed.
 * 
 * @param cursor The new cursor to be used
 */
public void changeCursor(Cursor cursor) {
    Cursor old = swapCursor(cursor);
    if (old != null) {
        old.close();
    }
}

/**
 * Swap in a new Cursor, returning the old Cursor.  Unlike
 * {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
 * closed.
 *
 * @param newCursor The new cursor to be used.
 * @return Returns the previously set Cursor, or null if there wasa not one.
 * If the given new Cursor is the same instance is the previously set
 * Cursor, null is also returned.
 */
public Cursor swapCursor(Cursor newCursor) {
    if (newCursor == mCursor) {
        return null;
    }
    Cursor oldCursor = mCursor;
    if (oldCursor != null) {
        if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
        if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
    }
    mCursor = newCursor;
    if (newCursor != null) {
        if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
        if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
        mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
        mDataValid = true;
        // notify the observers about the new cursor
        notifyDataSetChanged();
    } else {
        mRowIDColumn = -1;
        mDataValid = false;
        // notify the observers about the lack of a data set
        notifyDataSetInvalidated();
    }
    return oldCursor;
}