Listview onItemClickListener 获取数据答案

【问题标题】：Listview onItemClickListener obtaining dataListview onItemClickListener 获取数据
【发布时间】：2015-08-22 08:55:55
【问题描述】：

我在内部存储中保存了一个字符串数组，我正在使用它从 Parse.com 检索特定用户的名称。这是代码：

SharedPreferences settings = getSharedPreferences("NotificationIDs", Context.MODE_PRIVATE);
    Set<String> myStrings = settings.getStringSet("myStrings", new HashSet<String>());

    final ListView idList;
    idList = (ListView) findViewById(android.R.id.list);

    final ArrayAdapter<String> str = new ArrayAdapter<>(getBaseContext(), android.R.layout.simple_list_item_1, new ArrayList<String>());
    idList.setAdapter(str);

    for(String userIds : myStrings) {
        ParseQuery<ParseObject> query = ParseQuery.getQuery("_User");
        query.getInBackground(userIds, new GetCallback<ParseObject>() {
            @Override
            public void done(ParseObject parseObject, ParseException e) {
                String name = parseObject.getString("fullname");
                Log.d("These are the names: ", name);

                str.add(name);
            }
        });
    }

    idList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            String names = str.getItem(position);
            Toast.makeText(UserListForHistory.this, names, Toast.LENGTH_SHORT).show();

        }
    });

有没有办法配置它，以便当我单击一个项目时，它会显示保存在“myString”数组中的用户 ID？因为我想显示一个包含特定名称的列表，但单击时我想获取该特定用户的 objectid。我知道如何做到这一点的唯一方法是将 String UserIds 直接保存到适配器，然后它会在列表中显示 id 而不是名称。

//编辑解决方案

SharedPreferences settings = getSharedPreferences("NotificationIDs", Context.MODE_PRIVATE);
    Set<String> myStrings = settings.getStringSet("myStrings", new HashSet<String>());
    final List<String> users = new ArrayList<>();

    final ListView idList;
    idList = (ListView) findViewById(android.R.id.list);

    final ArrayAdapter<String> str = new ArrayAdapter<>(getBaseContext(), android.R.layout.simple_list_item_1, new ArrayList<String>());
    idList.setAdapter(str);

    for(final String userIds : myStrings) {
        ParseQuery<ParseObject> query = ParseQuery.getQuery("_User");
        query.getInBackground(userIds, new GetCallback<ParseObject>() {
            @Override
            public void done(ParseObject parseObject, ParseException e) {

                String name = parseObject.getString("fullname");
                Log.d("These are the names: ", name);

                str.add(name);
                users.add(userIds);
            }
        });
    }

    idList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            String user = users.get(position);
            Toast.makeText(UserListForHistory.this, user, Toast.LENGTH_SHORT).show();

        }
    });

【问题讨论】：

标签： android arrays listview android-listview parse-platform

【解决方案1】：

如果我理解，这是这样做的一种方法：

SharedPreferences settings = getSharedPreferences("NotificationIDs", Context.MODE_PRIVATE);
    Set<String> myStrings = settings.getStringSet("myStrings", new HashSet<String>());
    List<ParseObject> users = new ArrayList<>();

final ListView idList;
idList = (ListView) findViewById(android.R.id.list);

final ArrayAdapter<String> str = new ArrayAdapter<>(getBaseContext(), android.R.layout.simple_list_item_1, new ArrayList<String>());
idList.setAdapter(str);

for(String userIds : myStrings) {
    ParseQuery<ParseObject> query = ParseQuery.getQuery("_User");
    query.getInBackground(userIds, new GetCallback<ParseObject>() {
        @Override
        public void done(ParseObject parseObject, ParseException e) {

            String name = parseObject.getString("fullname");
            Log.d("These are the names: ", name);

            str.add(name);
            users.add(parseObject);
        }
    });
}

idList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

        ParseObject user = users.get(position);
        Toast.makeText(UserListForHistory.this, user.getString("userIDs"), Toast.LENGTH_SHORT).show();

    }
});

如果不起作用，请在下面发表评论。

【讨论】：