第四次作业

<?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="match_parent"
    android:orientation="vertical">
 
    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="35dp"
        android:background="#009688"
        android:gravity="center"
        android:text="购物清单"
        android:textColor="#E91E63"
        android:textSize="25sp" />
 
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="vertical">
 
        <ListView
            android:id="@+id/fruit_item"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    </LinearLayout>
</LinearLayout>

package com.example.shoppinglist;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
 
import java.util.ArrayList;
import java.util.List;
 
public class MainActivity extends Activity {
    final List<Fruit> fruitList = new ArrayList<Fruit>();
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initFruits();
        FruitAdapte adapter = new FruitAdapte(this,R.layout.item,fruitList);
        ListView lv = (ListView)findViewById(R.id.fruit_item);
        lv.setAdapter(adapter);
 
    }
 
    public void initFruits(){
        Fruit orange = new Fruit("桔子","8.5元1斤",R.mipmap.orange);
        fruitList.add(orange);
        Fruit cherry = new Fruit("樱桃","40元1斤",R.mipmap.cherry);
        fruitList.add(cherry);
        Fruit grape = new Fruit("葡萄","5元1斤",R.mipmap.grape);
        fruitList.add(grape);
        Fruit durian = new Fruit("榴莲","50元1斤",R.mipmap.durian);
        fruitList.add(durian);
        Fruit mango = new Fruit("芒果","7元1斤",R.mipmap.mango);
        fruitList.add(mango);
        Fruit litchi = new Fruit("荔枝","15元1斤",R.mipmap.litchi);
        fruitList.add(litchi);
        Fruit guava = new Fruit("石榴","3元1斤",R.mipmap.guava);
        fruitList.add(guava);
 
    }
}

package com.example.shoppinglist;
 
public class Fruit {
    private int imageId;
    private String Name,Price;
    public Fruit(String Name, String Price, int imageId) {
        super();
        this.imageId = imageId;
        this.Name = Name;
        this.Price = Price;
    }
 
    public int getImageId() {
        return imageId;
    }
 
    public void setImageId(int imageId) {
        this.imageId = imageId;
    }
 
    public String getName() {
        return Name;
    }
 
    public void setName(String name) {
        Name = name;
    }
 
    public String getPrice() {
        return Price;
    }
 
    public void setPrice(String price) {
        Price = price;
    }
 
    public Object getItem(int position){
        return position;
    }
 
}

package com.example.shoppinglist;
 
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
 
import java.util.List;
 
public class FruitAdapte extends ArrayAdapter {
    int resourceId;
    public FruitAdapte(Context context, int resource, List<Fruit> objects){
        super(context, resource,objects);
        resourceId=resource;
    }
 
    @Override
    public View getView(int position, View convertView, ViewGroup parent){
        Fruit fruit = (Fruit)getItem(position);
        View view = LayoutInflater.from(getContext()).inflate(resourceId,null);
        ImageView iv = (ImageView)view.findViewById(R.id.imageView);
        TextView tv = (TextView)view.findViewById(R.id.textName);
        TextView pv = (TextView)view.findViewById(R.id.textPrice);
        iv.setImageResource(fruit.getImageId());
        tv.setText((CharSequence) fruit.getName());
        pv.setText((CharSequence)fruit.getPrice());
 
        return  view;
    }
 
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
 
    <ImageView
        android:id="@+id/imageView"
        android:layout_width="100dp"
        android:layout_height="100dp"
        app:srcCompat="@mipmap/grape" />
 
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:gravity="left|center_vertical"
        android:orientation="vertical"
        android:scrollbarSize="8dp">
 
        <TextView
            android:id="@+id/textName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="葡萄" />
 
        <TextView
            android:id="@+id/textPrice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="价格：5元1斤"
            android:textSize="16sp" />
    </LinearLayout>
 
</LinearLayout>