Android开发丶带有类型的列表功能实现

标题乍看起来有点不知所云，话不多说，效果图附上

每个大标签分为数个小标签，顶部有个类型title，点击每个小item会触发相应位置的点击事件，欧了，流程走起来~~~

1.首先当然还是画UI啦，分析界面，只是一个列表，这里我们用RecyclerView。

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.RecyclerView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:id="@+id/main_rl"
    />

2.绘制每个大标签item的布局，分析界面，上方的TextView类型，下方我们放置一个竖直方向的LinearLayout布局用于动态加载小标签item。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#e3e3e3"
    android:orientation="vertical">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:background="#ffffff"
        android:orientation="vertical">
        <TextView
            android:id="@+id/item_main_type"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:text="类型"
            android:textColor="@color/colorPrimaryDark"
            android:textSize="16sp" />
        <View
            android:layout_width="match_parent"
            android:layout_height="1px"
            android:background="@color/colorPrimaryDark" />
        <LinearLayout
            android:id="@+id/item_main_ll"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

3.然后画每个小item标签的布局，这里比较简单，只是一个TextView，圆点ImageView和下方的一条横线view

item_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#e3e3e3"
    android:orientation="vertical">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:background="#ffffff"
        android:orientation="vertical">
        <TextView
            android:id="@+id/item_main_type"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:text="类型"
            android:textColor="@color/colorPrimaryDark"
            android:textSize="16sp" />
        <View
            android:layout_width="match_parent"
            android:layout_height="1px"
            android:background="@color/colorPrimaryDark" />
        <LinearLayout
            android:id="@+id/item_main_ll"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

4.圆点背景xml如下

shape_point.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
    <size android:width="10dp"
        android:height="10dp"/>
    <solid android:color="@color/colorPrimaryDark"/>
</shape>

5.布局画完，添加一些假数据，新建一个内容bean

package com.fantasychong.typelisttest0911;

import java.util.List;

public class MainBean {
    private String type;
    private List<MainBeanItem> content;

    @Override
    public String toString() {
        return "MainBean{" +
                "type='" + type + '\'' +
                ", content=" + content +
                '}';
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public List<MainBeanItem> getContent() {
        return content;
    }

    public void setContent(List<MainBeanItem> content) {
        this.content = content;
    }

    public MainBean(String type, List<MainBeanItem> content) {
        this.type = type;
        this.content = content;
    }

    public MainBean() {
    }

    public static class MainBeanItem {
        private String title;

        @Override
        public String toString() {
            return "MainBeanItem{" +
                    "title='" + title + '\'' +
                    '}';
        }

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        public MainBeanItem(String title) {
            this.title = title;
        }
    }
}

6.接下来就可以搞列表适配器了，重点，敲黑板！！！

在holder中初始化控件

class MyHolder extends RecyclerView.ViewHolder {
    private final LinearLayout ll;
    private final TextView type;
    public MyHolder(@NonNull View itemView) {
        super(itemView);
        ll = itemView.findViewById(R.id.item_main_ll);
        type = itemView.findViewById(R.id.item_main_type);
    }
}

重写onBindViewHolder方法，在这里动态添加子item标签。

@Override
public void onBindViewHolder(@NonNull MainAdapter.MyHolder myHolder, int position) {
    myHolder.type.setText(list.get(position).getType());
    myHolder.ll.removeAllViews();
    final List<MainBean.MainBeanItem> mainBeanItemList= list.get(position).getContent();

    if (list.size() > 0) {
        for (int i = 0; i < mainBeanItemList.size(); i++) {

            View view = LayoutInflater.from(context).inflate(R.layout.item_main_content, null);
            title = view.findViewById(R.id.item_main_content_title);
            item = view.findViewById(R.id.item_main_content_ll);
            divider = view.findViewById(R.id.item_main_content_view);
            title.setText(mainBeanItemList.get(i).getTitle());
            myHolder.ll.addView(view);
            if (i== mainBeanItemList.size()- 1){
                divider.setVisibility(View.GONE);
            }else {
                divider.setVisibility(View.VISIBLE);
            }   
        }
    }
}

使用接口回调完成子item标签的点击事件

public interface OnItemClickListener{
    void onItemClick(MainBean.MainBeanItem beanItem);
}

public void setOnItemClickListener(OnItemClickListener listener){
    this.listener= listener;
}

给子item标签设置点击事件

if (i== mainBeanItemList.size()- 1){
    divider.setVisibility(View.GONE);
}else {
    divider.setVisibility(View.VISIBLE);
}
final int finalI = i;
item.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        listener.onItemClick(mainBeanItemList.get(finalI));
    }
});

7.打开Activity

添加假数据

private void initList() {
    MainBean bean= new MainBean();
    List<MainBean.MainBeanItem> list =  new ArrayList<>();
    bean.setType("宋冬野");
    MainBean.MainBeanItem beanItem= new MainBean.MainBeanItem("斑马斑马");
    MainBean.MainBeanItem beanItem1= new MainBean.MainBeanItem("鸽子");
    MainBean.MainBeanItem beanItem2= new MainBean.MainBeanItem("卡比巴拉的海");
    list.add(beanItem);
    list.add(beanItem1);
    list.add(beanItem2);
    bean.setContent(list);

    MainBean bean1= new MainBean();
    List<MainBean.MainBeanItem> list1 =  new ArrayList<>();
    bean1.setType("王菲");
    MainBean.MainBeanItem beanItem3= new MainBean.MainBeanItem("你在终点等我");
    MainBean.MainBeanItem beanItem4= new MainBean.MainBeanItem("人间");
    MainBean.MainBeanItem beanItem5= new MainBean.MainBeanItem("红豆");
    MainBean.MainBeanItem beanItem9= new MainBean.MainBeanItem("匆匆那年");
    list1.add(beanItem3);
    list1.add(beanItem4);
    list1.add(beanItem5);
    list1.add(beanItem9);
    bean1.setContent(list1);

    MainBean bean2= new MainBean();
    List<MainBean.MainBeanItem> list2 =  new ArrayList<>();
    bean2.setType("陈粒");
    MainBean.MainBeanItem beanItem6= new MainBean.MainBeanItem("奇妙能力歌");
    MainBean.MainBeanItem beanItem7= new MainBean.MainBeanItem("祝星");
    list2.add(beanItem6);
    list2.add(beanItem7);
    bean2.setContent(list2);

    mainBeanList= new ArrayList<>();
    mainBeanList.add(bean);
    mainBeanList.add(bean1);
    mainBeanList.add(bean2);
}

初始化控件

rl= findViewById(R.id.main_rl);
LinearLayoutManager manager= new LinearLayoutManager(this);
rl.setLayoutManager(manager);

initList();
MainAdapter adapter= new MainAdapter(MainActivity.this, mainBeanList);
rl.setAdapter(adapter);

接口回调设置监听，根据需求完成相应的操作。

adapter.setOnItemClickListener(new MainAdapter.OnItemClickListener() {
    @Override
    public void onItemClick(MainBean.MainBeanItem beanItem) {
        Toast.makeText(MainActivity.this, beanItem.getTitle(), Toast.LENGTH_SHORT).show();
    }
});

至此全部完成，附上demo

资源下载