在Android 7设备上，Long-Click触发Listview的上下文菜单和选择

Question

我有一个ExpandableListView，我为它实现了选择(短击)和删除(长击)。短列表项单击由onChildClick()处理，长单击由onCreateContextMenu()处理。

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);

    ExpandableListView.ExpandableListContextMenuInfo info = (ExpandableListView.ExpandableListContextMenuInfo) menuInfo;
    mDeleteItemGroup = ExpandableListView.getPackedPositionGroup(info.packedPosition);
    mDeleteItemChild = ExpandableListView.getPackedPositionChild(info.packedPosition);

    menu.setHeaderTitle("some title");
    MenuInflater inflater = mActivity.getMenuInflater();
    inflater.inflate(R.menu.menu_my_view_context, menu);
}

上面显示了上下文菜单代码，它很好地处理了长单击。问题是缺乏风格，它截断了一些设备上较长的标题。因此，我使用了一个自定义对话框，而不是标准上下文菜单，如下所示：

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);

    ExpandableListView.ExpandableListContextMenuInfo info = (ExpandableListView.ExpandableListContextMenuInfo) menuInfo;
    mDeleteItemGroup = ExpandableListView.getPackedPositionGroup(info.packedPosition);
    mDeleteItemChild = ExpandableListView.getPackedPositionChild(info.packedPosition);

    String title = "some title";

    ConfirmDeletePopupFragment confirmDeletePopupFragment = ConfirmDeletePopupFragment.newInstance(title);
    confirmDeletePopupFragment.setTargetFragment(this, 0);
    confirmDeletePopupFragment.show(getActivity().getSupportFragmentManager(), "tag");
}

除了运行安卓7的Nexus5X外，这在所有设备上都能很好地工作。在这里，长时间点击就可以通过onChildClick触发上下文菜单和选择，这显然不是我想要的。

如何在仍然使用自定义对话框时阻止项选择。

Answer 1

我可以提供我目前的解决方案或解决办法，感觉不太理想，因为它修补了一些我打破的东西，用我的自定义对话框替换上下文菜单。思想是在删除处理启动时静音选择处理，并在对话框的回调中解除其静音。

这是可行的，但我一开始就不想破坏它。所以可能有更好的方法。

public class MyListFragment extends ExpandableListFragment implements ConfirmDeletePopupFragment.DialogListener {

    (...)   

    private boolean mMuteSelection = false;

    (...)

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);

        mMuteSelection = true;

        ExpandableListView.ExpandableListContextMenuInfo info = (ExpandableListView.ExpandableListContextMenuInfo) menuInfo;
        mDeleteItemGroup = ExpandableListView.getPackedPositionGroup(info.packedPosition);
        mDeleteItemChild = ExpandableListView.getPackedPositionChild(info.packedPosition);

        String title = "some title"

        ConfirmDeletePopupFragment confirmDeleteWeakPopupFragment = ConfirmDeletePopupFragment.newInstance(title);
        confirmDeletePopupFragment.setTargetFragment(this, 0);
        confirmDeletePopupFragment.show(getActivity().getSupportFragmentManager(), "tag");
    }

    (...)

    @Override
    public boolean onChildClick(ExpandableListView arg0, View arg1, int group, int child, long arg4) {
        super.onChildClick(arg0, arg1, group, child, arg4);

        if (!mMuteSelection) {
            (handle selection)
        }
        return false;
    }

    (...)

    @Override
    public void onDeleteConfirm(boolean delete) {
        if (delete) {
            (handle deletion)
        }
        mMuteSelection = false;
    }
}