Android下ListView的学习

Android下ListView的学习

  文字加图片的ListView

1.添加图片文件

　　在res下drawable-hdpi文件里添加所需的图片资源；

　　例：guide1.jpg，guide2.jpg，guide3.jpg，guide4.jpg，guide5.jpg，guide6.jpg，guide7.jpg，guide8.jpg.

2.MainActivity.java文件

package com.example.listview;

import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {
    //private String[] data = { "Apple", "Banana", "Orange", "Watermelon",
            //"Pear", "Grape", "Pineapple", "Strawberry", "Cherry", "Mango" };
    private List<Fruit> fruitList = new ArrayList<Fruit>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        initFruits(); // 初始化水果数据
        FruitAdapter adapter = new FruitAdapter(MainActivity.this,
        R.layout.fruit_item, fruitList);
        ListView listView = (ListView) findViewById(R.id.listView1);
        listView.setAdapter(adapter);
        
        /*ArrayAdapter<String> adapter = new ArrayAdapter<String>(
                MainActivity.this, android.R.layout.simple_list_item_1, data);
                ListView listView = (ListView) findViewById(R.id.listView1);
                listView.setAdapter(adapter);*/
    }
    private void initFruits() {
        Fruit apple = new Fruit("Apple", R.drawable.guide1);
        fruitList.add(apple);
        Fruit banana = new Fruit("Banana", R.drawable.guide2);
        fruitList.add(banana);
        Fruit orange = new Fruit("Orange", R.drawable.guide3);
        fruitList.add(orange);
        Fruit watermelon = new Fruit("Watermelon", R.drawable.guide4);
        fruitList.add(watermelon);
        Fruit pear = new Fruit("Pear", R.drawable.guide5);
        fruitList.add(pear);
        Fruit grape = new Fruit("Grape", R.drawable.guide6);
        fruitList.add(grape);
        Fruit pineapple = new Fruit("Pineapple", R.drawable.guide7);
        fruitList.add(pineapple);
        Fruit strawberry = new Fruit("Strawberry", R.drawable.guide8);
        fruitList.add(strawberry);
        }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
}

3.Fruit.java文件

public class Fruit {
private String name;
private int imageId;
public Fruit(String name, int imageId) {
this.name = name;
this.imageId = imageId;
}
public String getName() {
return name;
}
public int getImageId() {
return imageId;
}
}

4.FruitAdapter.java文件

package com.example.listview;

import java.util.List;

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;

public class FruitAdapter extends ArrayAdapter<Fruit> {
    private int resourceId;

    public FruitAdapter(Context context, int textViewResourceId,List<Fruit> objects) {
        super(context, textViewResourceId,objects);
        resourceId = textViewResourceId;
        // TODO 自动生成的构造函数存根
    }
    public View getView(int position, View convertView, ViewGroup parent) {
        Fruit fruit = getItem(position); // 获取当前项的Fruit实例
        View view = LayoutInflater.from(getContext()).inflate(resourceId, null);
        ImageView fruitImage = (ImageView) view.findViewById(R.id.fruit_image);
        TextView fruitName = (TextView) view.findViewById(R.id.fruit_name);
        fruitImage.setImageResource(fruit.GetimageId());
        fruitName.setText(fruit.GetName());
        return view;
        }

}

5.AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.listview"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.listview.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

6.activity_main.xml

<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="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </ListView>
    
</LinearLayout>

7.fruit_item.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
        <ImageView
        android:id="@+id/fruit_image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
        <TextView
        android:id="@+id/fruit_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginLeft="10dip" />
    
</LinearLayout>

8.结果预览图