android - ListView：隐藏上下文操作栏

Question

我正在按照官方指南使用这样的上下文操作模式：

    listView.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE_MODAL);
    listView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {

        @Override
        public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
        }

        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            MenuInflater inflater = mode.getMenuInflater();
            inflater.inflate(R.menu.shelf_context, menu);
            return true;
        }

        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            return true;
        }

        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            // some processing...
            return true;
        }

        @Override
        public void onDestroyActionMode(ActionMode mode) {
        }
    });

我的 listView 在 aFragment里面ViewPager，所以我想在片段变得不可见时隐藏上下文操作栏。但是我该怎么做呢？我打电话listView.clearChoices()清除选择，但 CAB 仍然可见：

@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
    super.setUserVisibleHint(isVisibleToUser);
    if (!isVisibleToUser) {
        listView.clearChoices(); // CAB is still visible.
    }
}

Answer 1

mode.finish()不工作？

case R.id.action_remove:
    mode.finish();

Answer 2

经过一番研究，我发现了一种hacky方法：

@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
    super.setUserVisibleHint(isVisibleToUser);
    if (!isVisibleToUser) {
        listView.clearChoices();
        listView.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE_MODAL); // this strange hack dismisses the CAB.
    }
}