ListView setOnItemClickListener 和 setOnItemSelectedListener 来存储 Selected Item Index

Question

我在这个网站上读到，如果我们想知道 SelectedItem 的索引 (.getSelectedItemPosition())，就必须自定义 ListView 的 setOnItemSelectedListener 和 setOnItemClickListener。这就是我所做的，但它不存储 SekectedItem 的位置，而是我总是 -1...

我想要做的只是为用户提供一种方法，通过选定的项目和单击按钮从列表中删除项目。

请看下面的代码：

    listViewPeople.setOnItemClickListener(new ListView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> a, View v, int i, long l) {
            try {
                // Remembers the selected Index
                listViewPeopleId = listViewPeople.getSelectedItemPosition();
            }
            catch(Exception e) {
                System.out.println("Nay, cannot get the selected index");
            }
        }
    });

    listViewPeople.setOnItemSelectedListener(new ListView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> a, View v, int i, long l) {
            try {
                // Remembers the selected Index
                listViewPeopleId = listViewPeople.getSelectedItemPosition();
                System.out.println("Yay, set the selected index " + listViewPeopleId);
            }
            catch(Exception e) {
                System.out.println("Nay, cannot get the selected index " + listViewPeopleId);
            }
        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            try {
                // Remembers nothing selected
                listViewPeopleId = -1;
                System.out.println("Yay, set that nothing is selected " + listViewPeopleId);
            }
            catch(Exception e) {
                System.out.println("Nay, cannot set that nothing is selected " + listViewPeopleId);
            }
        }
    });

怎么了？？

感谢您的帮助！

克里斯托夫

Answer 1

不要使用listViewPeople.getSelectedItemPosition();，而是尝试使用 int i 参数来获取索引。