Fruit类
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; } }
FruitAdapter 适配器
public class FruitAdapter extends ArrayAdapter<Fruit> { private int resourceId; public FruitAdapter(Context context, int textViewResourceId, List<Fruit> objects){ super(context,textViewResourceId,objects); resourceId = textViewResourceId; } @Override public View getView(int position, View convertView, ViewGroup parent){//每个子项被滚动到屏幕内会被调用 Fruit fruit = getItem(position);//获得当前fruit实例 //View view = LayoutInflater.from(getContext()).inflate(resourceId,parent,false); View view; ViewHoler viewHoler; if(convertView == null){ view = LayoutInflater.from(getContext()).inflate(resourceId,parent,false); viewHoler = new ViewHoler(); viewHoler.fruitImage = (ImageView) view.findViewById(R.id.fruit_image); viewHoler.fruitName = (TextView) view.findViewById(R.id.fruit_name); view.setTag(viewHoler); }else{ view = convertView; viewHoler = (ViewHoler) view.getTag(); } //ImageView fruitImage = (ImageView) view.findViewById(R.id.fruit_image); //TextView fruitName = (TextView) view.findViewById(R.id.fruit_name); viewHoler.fruitImage.setImageResource(fruit.getImageId()); viewHoler.fruitName.setText(fruit.getName()); return view; } class ViewHoler{ ImageView fruitImage; TextView fruitName; } }
import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.Toast; import java.sql.Array; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { /*private String[] data={"苹果","香蕉","桔子","西瓜","梨子","葡萄", "菠萝","草莓", "樱桃","芒果","苹果","香蕉","桔子","西瓜", "梨子","葡萄","菠萝","草莓","樱桃","芒果"};*/ private List<Fruit> fruitList = new ArrayList<>();//动态数组 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initFruits();//初始化数据 FruitAdapter adapter =new FruitAdapter(MainActivity.this,R.layout.fruit_item,fruitList);//自定义适配器 /* ArrayAdapter<String> adapter = new ArrayAdapter<String>( MainActivity.this,android.R.layout.simple_expandable_list_item_1,data); //适配器,当前上下文、 ListView 子项布局的id、 适配的数据 */ ListView listView = (ListView) findViewById(R.id.list_view); listView.setAdapter(adapter);//传递适配器对象 listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int i, long l) { Fruit fruit = fruitList.get(i); Toast.makeText(MainActivity.this,fruit.getName(), Toast.LENGTH_SHORT).show(); } }); } private void initFruits(){ for(int i =0 ; i<2 ; i++){ Fruit apple = new Fruit("苹果",R.drawable.apple_pic); fruitList.add(apple); Fruit banana = new Fruit("香蕉",R.drawable.banana_pic); fruitList.add(banana); Fruit orange = new Fruit("桔子",R.drawable.orange_pic); fruitList.add(orange); Fruit watermelon = new Fruit("西瓜",R.drawable.watermelon_pic); fruitList.add(watermelon); Fruit pear = new Fruit("梨子",R.drawable.pear_pic); fruitList.add(pear); Fruit grape = new Fruit("葡萄",R.drawable.grape_pic); fruitList.add(grape); Fruit pineapple = new Fruit("菠萝",R.drawable.pineapple_pic); fruitList.add(pineapple); Fruit strawberry = new Fruit("草莓",R.drawable.strawberry_pic); fruitList.add(strawberry); Fruit cherry = new Fruit("樱桃",R.drawable.cherry_pic); fruitList.add(cherry); Fruit mango = new Fruit("芒果",R.drawable.mango_pic); fruitList.add(mango); } } }
activity_main.xml
<LinearLayout 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="com.ldxiaofeng.android.listviewtest.MainActivity"> <ListView android:id="@+id/list_view" android:layout_width="match_parent" android:layout_height="match_parent"></ListView> </LinearLayout>
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_vertical" android:layout_marginLeft="10dp"/> </LinearLayout>