每日总结2023-05-02

对于listView，内部item为这种格式，

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="10dp"
    android:background="@drawable/list_background"
    android:orientation="vertical"
    android:padding="10dp">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="商品名"
            android:textColor="@color/black" />

        <TextView
            android:id="@+id/chart_lv_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="30sp"
            android:text="@string/exampling" />

        <TextView
            android:id="@+id/chart_lv_time"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="right"
            android:text="@string/exampling" />
    </LinearLayout>

    <View
        android:layout_width="match_parent"
        android:layout_height="1px"
        android:layout_marginTop="5dp"
        android:layout_marginBottom="4dp"
        android:background="@color/mi_bai" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="收益:(元)"
            android:textColor="@color/black" />

        <TextView
            android:id="@+id/chart_lv_price"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="@string/exampling"
            android:textSize="16sp" />
    </LinearLayout>

</LinearLayout>

通过adapter(适配器)来说

package com.example.math.adapter;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import com.example.math.R;
import com.example.math.bean.Commodity;

import java.util.List;

public class ListAdapter extends BaseAdapter {
    Context context;
    List<Commodity> mData;
    LayoutInflater inflater;

    public ListAdapter(Context context, List<Commodity> mData) {
        this.context = context;
        this.mData = mData;
        inflater = LayoutInflater.from(context);
    }

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

    @Override
    public Object getItem(int position) {
        return mData.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 = inflater.inflate(R.layout.mell_lv, parent, false);
            Holder = new ViewHolder(convertView);
            convertView.setTag(Holder);
        } else {
            Holder = (ViewHolder) convertView.getTag();
        }
        Commodity commodity = mData.get(position);
        Holder.typeName.setText(commodity.getName());
        Holder.typePrice.setText("￥   " + commodity.getPrice() + "");
        Holder.typeTotal.setText(commodity.getTotal() + "");
        Holder.typeLeft.setText(commodity.getLeftover() + "");
        return convertView;
    }

    static class ViewHolder {
        TextView typeName, typeTotal, typeLeft, typePrice;

        public ViewHolder(View view) {
            typeName = view.findViewById(R.id.mall_name);
            typeTotal = view.findViewById(R.id.mall_total);
            typeLeft = view.findViewById(R.id.mall_leftover);
            typePrice = view.findViewById(R.id.mall_price);
        }
    }
}