Android 分組ListView 案例

關於分組ListView的示例，如下效果：

按年月進行分組排序。

1、Activity：

package com.gshop.mine.mypoints;

import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.ListView;

import com.gbi.adapter.WealthAdapter;
import com.gbi.bean.WealthBean;
import com.gbi.customview.Title;
import com.gbi.utils.DateUtils;
import com.gbi.yfshop.BaseActivity;
import com.gbi.yfshop.R;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;

public class WealthActivity extends BaseActivity implements View.OnClickListener {

    private ListView lv_wealth;
    private List<WealthBean> datas;
    private WealthAdapter wealthAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_wealth);
        initView();
    }

    private void initView(){
        datas = new ArrayList<>();
        datas.add(new WealthBean(1,"2022-06-10 10:10:22"));
        datas.add(new WealthBean(2,"2022-06-12 10:10:26"));
        datas.add(new WealthBean(3,"2022-07-10 10:10:28"));
        datas.add(new WealthBean(4,"2022-07-12 10:10:30"));
        datas.add(new WealthBean(5,"2022-08-10 10:10:32"));
        datas.add(new WealthBean(6,"2022-08-12 10:10:36"));
        datas.add(new WealthBean(7,"2022-09-10 10:10:38"));
        datas.add(new WealthBean(8,"2022-09-12 10:10:50"));

        Collections.sort(datas, new Comparator<WealthBean>(){

            @Override
            public int compare(WealthBean o1, WealthBean o2) {
                Date d1 = DateUtils.stringToDate(o1.getBuyDate());
                Date d2 = DateUtils.stringToDate(o2.getBuyDate());
                return d2.compareTo(d1);
            }
        });

        List tags = getTag();
        lv_wealth = findViewById(R.id.lv_wealth);
        wealthAdapter = new WealthAdapter(this,datas,tags);
        wealthAdapter.setDataList(datas);
        lv_wealth.setAdapter(wealthAdapter);
        wealthAdapter.notifyDataSetChanged();
    }

    private List getTag(){
        List result = new ArrayList<>();
        for (WealthBean w: datas){
            if(!result.contains(DateUtils.stringToDateStr(w.getBuyDate()))){
                result.add(DateUtils.stringToDateStr(w.getBuyDate()));
            }
        }
        return result;
    }

    @Override
    public void onClick(View v) {

    }
}

2、WealthAdapter：

package com.gbi.adapter;

import android.content.Context;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import androidx.annotation.NonNull;

import com.gbi.bean.WealthBean;
import com.gbi.utils.DateUtils;
import com.gbi.yfshop.R;

import java.util.List;

public class WealthAdapter extends ArrayAdapter {

    private Context mContext;
    private List<WealthBean> mList;
    private OnClickedListener mListener;
    private List listTag = null;

    public WealthAdapter(@NonNull Context context, int resource) {
        super(context, resource);
    }

    public WealthAdapter(Context context, List<WealthBean> list, List tags) {
        super(context, 0, list);
        mContext = context;
        mList = list;
        this.listTag = tags;
    }

    public interface OnClickedListener{
        void onCliked(int id);
    }

    public void setmListener(OnClickedListener mListener) {
        this.mListener = mListener;
    }

    public void setDataList(List<WealthBean> list){
        mList = list;
    }

    @Override
    public boolean isEnabled(int position) {

        if(position==0){
            return true;
        }
        String preDate = DateUtils.stringToDateStr(getItem(position -  1).getBuyDate());
        String currentDate = DateUtils.stringToDateStr(getItem(position).getBuyDate());
        if(preDate.equals(currentDate)){
            return false;
        }
        return super.isEnabled(position);
    }

    @Override
    public int getCount() {
        return mList.size();
    }

    @Override
    public WealthBean getItem(int position) {
        return mList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if(convertView==null) {
            convertView = View.inflate(mContext, R.layout.item_wealth,null);
            holder = initView(convertView);
        }else{
            holder = (ViewHolder) convertView.getTag();
        }
        WealthBean bean = mList.get(position);
        boolean isEnabled = isEnabled(position);
        String buyDate = DateUtils.stringToDateStr(bean.getBuyDate());
        Log.i("test","-----"+buyDate);
        if(isEnabled){
            holder.tv_buyDate.setText(buyDate);
            holder.tv_buyDate.setVisibility(View.VISIBLE);
        }else{
            holder.tv_buyDate.setVisibility(View.GONE);
        }
        holder.tv_detail_buyDate.setText(bean.getBuyDate());
        convertView.setTag(holder);
        return convertView;
    }
    private ViewHolder initView(View v){
        ViewHolder holder = new ViewHolder();
        holder.tv_buyDate = v.findViewById(R.id.tv_buyDate);
        holder.tv_detail_buyDate = v.findViewById(R.id.tv_detail_buyDate);
        return holder;
    }

    class ViewHolder {
        TextView tv_buyDate;
        TextView tv_detail_buyDate;
    }
}

3、WealthBean

package com.gbi.bean;

public class WealthBean {
    private int id;
    private String buyDate;

    public WealthBean() {
    }

    public WealthBean(int id, String buyDate) {
        this.id = id;
        this.buyDate = buyDate;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getBuyDate() {
        return buyDate;
    }

    public void setBuyDate(String buyDate) {
        this.buyDate = buyDate;
    }
}

4、DateUtils

package com.gbi.utils;

import java.text.SimpleDateFormat;
import java.util.Date;

public class DateUtils {
    public static String stringToDateStr(String dateString)  {
        String result = "";
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
            Date dateValue = sdf.parse(dateString);
            result = sdf.format(dateValue);
            return result;
        }catch (Exception exception){
            exception.getMessage();
        }
        return result;
    }

    public static Date stringToDate(String dateString)  {
        Date result = new Date();
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
            result = sdf.parse(dateString);

            return result;
        }catch (Exception exception){
            exception.getMessage();
        }
        return result;
    }
}

5、activity_wealth.xml

 <ListView
            android:id="@+id/lv_wealth"
            android:layout_width="match_parent"
            android:layout_height="match_parent"></ListView>

6、item_wealth.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:orientation="vertical">
    <TextView
        android:id="@+id/tv_buyDate"
        android:layout_marginTop="10dp"
        android:layout_marginLeft="10dp"
        android:text="2022-10-10"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="10dp"></TextView>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_marginLeft="10dp"
        android:layout_marginBottom="10dp"
        android:layout_marginRight="10dp"
        android:background="@color/white"
        android:padding="10dp">
        <LinearLayout
            android:layout_weight="1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="購買商品 皇室仙草 皇室仙草"></TextView>
            <TextView
                android:id="@+id/tv_detail_buyDate"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="2022-10-10 10:10:10"></TextView>
        </LinearLayout>
        <TextView
            android:layout_marginTop="10dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="+300"
            android:textColor="@color/red_color"
            ></TextView>
    </LinearLayout>
</LinearLayout>