Question

我必须读取json文件，两个字段：name和id_name。我创建了一个数组列表。用户只能看到名称。当用户点击名称时，我必须获得 ID 。我只向您介绍AssyncTask doInBackground过程的一部分。另外我用两个参数name和id创建了类名。

请帮帮我。这是我的代码。

protected ArrayList<Name> doInBackground(String... params) {

            ArrayList<Name> nameList = new ArrayList<>();
            String result = "";
            ......

             for (int i = 0; i < rootArray.length(); i++) {

                    JSONObject nameObject = rootArray.getJSONObject(i);

                    String name = nameObject.getString("name");
                    String id = nameObject.getString("id_name");

                    nameList.add(new NAME(name, id));

                }

            return nameList;
        }

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                String my_id = adapter.getItem(position).toString();

            }
        });

非常感谢。

Answer 1

 listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                TextView  tv_ID=(TextView)view.findViewById(R.id.tv_id);//Check your xml and set proper ID
                String my_id =tv_ID.getText().toString();
                Toast.makeText(CurrentActivity.this, my_id , Toast.LENGTH_SHORT).show();

            }
        });

Answer 2

为此活动声明您的数组全局，如

ArrayList<Name> nameList = new ArrayList<>();

然后

protected ArrayList<Name> doInBackground(String... params) {

            String result = "";
            ......

             if(nameList != null)
                nameList.clear();

             for (int i = 0; i < rootArray.length(); i++) {

                    JSONObject nameObject = rootArray.getJSONObject(i);

                    String name = nameObject.getString("name");
                    String id = nameObject.getString("id_name");

                    nameList.add(new NAME(name, id));

                }

            return nameList;
        }


listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                      Name name = nameList.get(position);
                      String id = name.getId();
                      String id = name.getName();

            }
        });

注意：如果您没有名称模型的getter方法，请创建getter方法。

Answer 3

尝试 ListView.get（位置）; 代替 Adapter.get（位置）;

从OnItemClickListener检索数据

3 个答案: