Question

我需要在父级和子级列表中制作一个ExpandableListView，其中包含3个TextView个。我有parentlist和childlist，每行有3 TextView秒。那我接下来该怎么办？

ArrayList<Contact> list = new ArrayList<>(); //main_equip
    list.add(new Contact("Surdialx", "Status","Available Works"));
    list.add(new Contact("Surdial", "Status","Available Works"));
    list.add(new Contact("Surdialx", "Status","Available Works"));
    list.add(new Contact("Surdial", "Status","Available Works"));
    list.add(new Contact("Surdialx", "Status","Available Works"));
    list.add(new Contact("Surdial", "Status","Available Works"));
    ArrayList<Contact1> childlist = new ArrayList<>(); //eq_works
    childlist.add(new Contact1("Work №1", "Status", "Priority"));
    childlist.add(new Contact1("Work №2", "Status","Priority"));
    childlist.add(new Contact1("Work №3", "Status","Priority"));

Answer 1

以这种方式创建Expandable Recyclerview

public class MainActivity extends AppCompatActivity {
    private RecyclerView recyclerview;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recyclerview = (RecyclerView) findViewById(R.id.recyclerview);
        recyclerview.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
        List<ExpandableListAdapter.Item> data = new ArrayList<>();

        data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.HEADER, "Fruits"));
        data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "Apple"));
        data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "Orange"));
        data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "Banana"));
        data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.HEADER, "Cars"));
        data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "Audi"));
        data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "Aston Martin"));
        data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "BMW"));
        data.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "Cadillac"));

        ExpandableListAdapter.Item places = new ExpandableListAdapter.Item(ExpandableListAdapter.HEADER, "Places");
        places.invisibleChildren = new ArrayList<>();
        places.invisibleChildren.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "Kerala"));
        places.invisibleChildren.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "Tamil Nadu"));
        places.invisibleChildren.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "Karnataka"));
        places.invisibleChildren.add(new ExpandableListAdapter.Item(ExpandableListAdapter.CHILD, "Maharashtra"));

        data.add(places);

        recyclerview.setAdapter(new ExpandableListAdapter(data));
    }
}

Answer 2

您可以使用此library轻松实现此功能，有一个完整示例here。

基本上，您将项目分组为：

class MySection extends StatelessSection {

    String header;
    List<Contact> list;
    boolean expanded = true;

    public MySection(String header, List<Contact> list) {
        // call constructor with layout resources for this Section header and items 
        super(R.layout.section_header, R.layout.section_item);
        this.myHeader = header;
        this.myList = list;
    }

    @Override
    public int getContentItemsTotal() {
        return expanded? list.size() : 0;
    }

    @Override
    public RecyclerView.ViewHolder getHeaderViewHolder(View view) {
        return new HeaderViewHolder(view);
    }

    @Override
    public void onBindHeaderViewHolder(RecyclerView.ViewHolder holder) {
        final HeaderViewHolder headerHolder = (HeaderViewHolder) holder;

        headerHolder.tvTitle.setText(title);

        headerHolder.rootView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                expanded = !expanded;
                headerHolder.imgArrow.setImageResource(
                        expanded ? R.drawable.ic_keyboard_arrow_up_black_18dp : R.drawable.ic_keyboard_arrow_down_black_18dp
                );
                sectionAdapter.notifyDataSetChanged();
            }
        });
    }

    @Override
    public RecyclerView.ViewHolder getItemViewHolder(View view) {
        // return a custom instance of ViewHolder for the items of this section
        return new MyItemViewHolder(view);
    }

    @Override
    public void onBindItemViewHolder(RecyclerView.ViewHolder holder, int position) {
        MyItemViewHolder itemHolder = (MyItemViewHolder) holder;

        // bind your view here
        itemHolder.tvItem.setText(list.get(position).getName());
    }
}

然后创建部分的实例并设置适配器：

// Create an instance of SectionedRecyclerViewAdapter 
SectionedRecyclerViewAdapter sectionAdapter = new SectionedRecyclerViewAdapter();

// Add your Sections
sectionAdapter.addSection(new MySection("Surdial", surdialList);
sectionAdapter.addSection(new MySection("Surdialx", surdialXList);
sectionAdapter.addSection(new MySection("Work", workList);

// Set up your RecyclerView with the SectionedRecyclerViewAdapter
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.setAdapter(sectionAdapter);

如何在父列表和子列表中创建包含3个TextView的ExpandableListView？

2 个答案: