Question

我有两个列表视图，父列表视图具有Essay项目，其中包含“ 20篇论文标题”的子列表视图。单击Essay的标题时，将打开一个具有文本视图以显示文本的活动。我不想每20篇论文就做20项活动。当我打开任何子项目时，有什么办法，它仅显示该子项目的指定数据。这是图片的例子

父母名单和描述性散文

[https://drive.google.com/file/d/1QksjP7hzpqmVCk_Y1ctwsDMYkijDHQPt/view?usp=sharing][1]

单击描述性论文后。它显示了Child EssayTitle列表

[https://drive.google.com/open?id=1NLbkrKD9c8yZb7rvapCxb-Na_lCVJf3P][2]

现在，单击“儿童列表”项的论文标题“ Call No Man Happy Till”。它显示完整答案

[https://docs.google.com/uc?export=download&id=1542uOZFzLx8vU7EMlsEhRaWZaguVTKHV ] [3]

我到不知道该怎么做的地方搜索。抱歉，但是我是android dev的新手。我刚刚创建了一个自定义适配器和一个数组列表

 public class Writing extends AppCompatActivity {
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.formenuitem);


            ArrayList<MenuItems> essay = new ArrayList<>();



            ArrayList<MenuItems> items = new ArrayList<>();

            ArrayList<MenuItems> task2Item = new ArrayList<>();

            //================= main items
            items.add(new MenuItems("Descriptive Essay", "list of descriptive essay and solutions"));

            items.add(new MenuItems("Essay 1", "More Essay list"));

            items.add(new MenuItems("Type of Essay ", "How to start Essay Task 1, body-paragraph "));


            items.add(new MenuItems("Task 2", "Solved essay "));


   //show this list in when clicked on Descriotive essay item================================================================


            task2Item.add(new MenuItems("Call No Man Happy Till","This essay about crime"));
            task2Item.add(new MenuItems("Education","This essay about Education"));
            task2Item.add(new MenuItems("University","This essay about University"));
            task2Item.add(new MenuItems("Food","This essay about Food"));
            task2Item.add(new MenuItems("Games","This essay about crime"));
            task2Item.add(new MenuItems("Experience","This essay about crime"));
            task2Item.add(new MenuItems("This is another essay","This essay about crime"));
            task2Item.add(new MenuItems("This is another essay","This essay about crime"));




    //======================set up for main item list
         final    ListAdapter adapter = new ListAdapter(this, items, R.color.category_numbers);


         //setting adapter to have task 2 list
            final ListAdapter task2list = new ListAdapter(Writing.this ,task2Item,R.color.category_numbers);

            //creating variable to find list view for both
          final  ListView listView = findViewById(R.id.list);

          final ListView task2 = (ListView) findViewById(R.id.list);

            listView.setAdapter(adapter);

            // set up to click on the writing

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

                        if(position==0){
                            // make clickable at position 0

                            task2.setAdapter(task2list);

                            task2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                                @Override
                                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                                    if (position==0){

                                        Intent open = new Intent(Writing.this,ContentDisplay.class);

                                        startActivity(open);


                                    }
                                }
                            });

                    }


                }
            });

        }
    }

I just when I open essay item it leads to me to an essay title list and when I click on essay title it shows me whole answer


  [1]: https://i.stack.imgur.com/HpgLL.jpg
  [2]: https://i.stack.imgur.com/wc4wx.jpg
  [3]: https://i.stack.imgur.com/yLqeg.jpg

Answer 1

您需要一个自定义适配器。在适配器视图内实现onClick侦听器。对于位置，标记适配器视图并在侦听器中获取其标记。我希望您熟悉创建自定义适配器。如果您需要更多帮助，我希望能提供帮助。

如何为子列表视图项添加子项的数据

1 个答案: