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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