RecyclerView部分和来自Firebase的数据 [英] RecyclerView Sections and data from Firebase

问题描述

您好，我正在开发一个应用程序，在这个应用程序中，我必须使用Firebase填充数据回收站。
现在我想要做的是用数据firebase填写一个recyclerview，但是有一些部分将是主数据firebase的父亲，我有点迷路了，而且我认为这是在适配器Recyclerview哪里没有同样，我希望你能帮助我。
对不起，我的英文不好。

谢谢！我很抱歉我的英文。

使用这个库 SectionedRecyclerViewAdapter 将数据分组到各个部分。

首先创建一个Section类：

  class MySection extends StatelessSection {
 
 String title; 
列表< String>列表; 
 $ b $ public MySection（String title，List< String> list）{
 //调用具有此页眉，页脚和项目布局资源的构造函数
 super（R.layout。 section_header，R.layout.section_item）; 
 
 this.title = title; 
 this.list = list; 
 
 
 @Override 
 public int getContentItemsTotal（）{
 return list.size（）; //本节的项目数
} 
 
 @Override 
 public RecyclerView.ViewHolder getItemViewHolder（View view）{
 //返回一个ViewHolder自定义实例这部分的项目
返回新的MyItemViewHolder（view）; 
 
 $ b @Override 
 public void onBindItemViewHolder（RecyclerView.ViewHolder持有者，int位置）{
 MyItemViewHolder itemHolder =（MyItemViewHolder）持有者; 
 
 //在这里绑定你的视图
 itemHolder.tvItem.setText（list.get（position））; 
} 
 
 @Override 
 public RecyclerView.ViewHolder getHeaderViewHolder（View view）{
 return new SimpleHeaderViewHolder（view）; 
 
 $ b @Override 
 public void onBindHeaderViewHolder（RecyclerView.ViewHolder持有者）{
 MyHeaderViewHolder headerHolder =（MyHeaderViewHolder）持有者; 
 
 //在这里绑定你的标题视图
 headerHolder.tvItem.setText（title）; 
 
 
 
 
 
 
 $ b然后你用你的章节设置RecyclerView： / p> 
 
 
  //创建SectionedRecyclerViewAdapter的实例
 SectionedRecyclerViewAdapter sectionAdapter = new SectionedRecyclerViewAdapter（）; 
 
 //使用每年的数据列表创建您的部分
 MySection section1 = new MySection（Section 1，section1DataList）; 
 MySection section2 = new MySection（Section 2，section2DataList）; 
 
 //将节添加到适配器
 sectionAdapter.addSection（section1）; 
 sectionAdapter.addSection（section2）; 
 
 //使用SectionedRecyclerViewAdapter设置您的RecyclerView 
 RecyclerView recyclerView =（RecyclerView）findViewById（R.id.recyclerview）; 
 recyclerView.setLayoutManager（新的LinearLayoutManager（getContext（）））; 
 recyclerView.setAdapter（sectionAdapter）; 
  
 
Hi I'm working on an app, in it I have to populate a data recyclerview with Firebase, ready.
Now I want to do is fill out a recyclerview with data firebase but has sections which would be the father that host data firebase, I'm a little lost with this, and I think it is in the adapter Recyclerview where not as do, I hope you can help me.
Sorry for my English, it's not good.



Thanks! and i am sorry for my english.
解决方案
Use this library SectionedRecyclerViewAdapter to group your data into sections.

First create a Section class:
class MySection extends StatelessSection {

    String title;
    List<String> list;

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

        this.title = title;
        this.list = list;
    }

    @Override
    public int getContentItemsTotal() {
        return list.size(); // number of items of this section
    }

    @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));
    }

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

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

        // bind your header view here
        headerHolder.tvItem.setText(title);
    }
}
Then you set up the RecyclerView with your Sections:
// Create an instance of SectionedRecyclerViewAdapter 
SectionedRecyclerViewAdapter sectionAdapter = new SectionedRecyclerViewAdapter();

// Create your sections with the list of data for each year
MySection section1 = new MySection("Section 1", section1DataList);
MySection section2 = new MySection("Section 2", section2DataList);

// Add your Sections to the adapter
sectionAdapter.addSection(section1);
sectionAdapter.addSection(section2);

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


                        
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