android 长按 ListView 无法弹出 ContextMeun

可能的原因：

onItemLongClick 消费了长按事件

mListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
    @Override
    public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
        mApSelect = position;
        Log.d(TAG, "onItemLongClick:" + mApSelect);
        return false;
    }
});

关键在 onItemLongClick 函数的返回值，看文档注释：

/**
         * Callback method to be invoked when an item in this view has been
         * clicked and held.
         *
         * Implementers can call getItemAtPosition(position) if they need to access
         * the data associated with the selected item.
         *
         * @param parent The AbsListView where the click happened
         * @param view The view within the AbsListView that was clicked
         * @param position The position of the view in the list
         * @param id The row id of the item that was clicked
         *
         * @return true if the callback consumed the long click, false otherwise
         */

如果返回 ture，系统认为用户实现的回调函数已经处理完了长按事件。而弹出 ContextMenu 也是长按事件的响应，且在 onItemLongClick 响应之后，所以返回 true 导致 ContextMenu 无法弹出。

来自为知笔记(Wiz)