定制ListView(在ListView的简单用法基础上修改)
新建fruit实体类
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;
}
}
为ListView子项指定自定义布局
新建fruit_item.xml
<?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:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:ignore="UseCompoundDrawables">
<ImageView
android:id="@+id/fruit_image"
android:layout_width="35sp"
android:layout_height="35sp"/>
<TextView
android:id="@+id/fruit_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginStart="10dp"
/>
</LinearLayout>
创建自定义适配器
public class FruitAdapter extends ArrayAdapter<Fruit> {
private final int resourceId;
@NonNull
@Override
@SuppressLint("ViewHolder")
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
Fruit fruit = getItem(position); //获取当前项的Fruit实例
View view = LayoutInflater.from(getContext()).inflate(resourceId, parent, false); //动态加载资源
ImageView fruitImage = view.findViewById(R.id.fruit_image);
TextView fruitName = view.findViewById(R.id.fruit_name);
fruitImage.setImageResource(fruit.getImageId());
fruitName.setText(fruit.getName());
return view;
}
public FruitAdapter(@NonNull MainActivity context, @NonNull List<Fruit> objects, int resourceId) {
super(context, resourceId, objects);
this.resourceId = resourceId;
}
}
修改MainActivity
public class MainActivity extends AppCompatActivity {
public List<Fruit> fruitList = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initFruits();
FruitAdapter adapter = new FruitAdapter(MainActivity.this,
fruitList, R.layout.fruit_item);
ListView listView = findViewById(R.id.list_view);
listView.setAdapter(adapter);
}
private void initFruits() {
for (int i = 0; i < 2; i++) {
Fruit apple = new Fruit("Apple",R.drawable.ic_apple);
fruitList.add(apple);
Fruit banana = new Fruit("Banana",R.drawable.ic_banana);
fruitList.add(banana);
Fruit orange = new Fruit("Orange",R.drawable.ic_orange);
fruitList.add(orange);
Fruit watermelon = new Fruit("Watermelon",R.drawable.ic_watermelon);
fruitList.add(watermelon);
Fruit pear = new Fruit("Pear",R.drawable.ic_pear);
fruitList.add(pear);
Fruit grape = new Fruit("Grape",R.drawable.ic_grape);
fruitList.add(grape);
Fruit pineapple = new Fruit("Pineapple",R.drawable.ic_pineapple);
fruitList.add(pineapple);
Fruit strawberry = new Fruit("Strawberry",R.drawable.ic_strawberry);
fruitList.add(strawberry);
Fruit cherry = new Fruit("Cherry",R.drawable.ic_cherry);
fruitList.add(cherry);
Fruit mango = new Fruit("Mango",R.drawable.ic_mango);
fruitList.add(mango);
}
}
}

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