设置item间分割线，分割线高度

android:divider="@android:color/darker_gray"
android:dividerHeight="10dp"

MainActivity.java 代码如下：

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Item item1=new Item();
        item1.setId(1);
        item1.setName("Android ");
        item1.setPrice(5000.0);

        Item item2=new Item();
        item2.setId(2);
        item2.setName("iphone");
        item2.setPrice(4000.0);

        Item[] items=new Item[]{item1,item2};
        ItemAdapter adapter =new ItemAdapter(this,R.layout.item_layout,items);
        ListView listlv=findViewById(R.id.listlv);
        listlv.setAdapter(adapter);
    }

Itme_layout.xml代码如下：

<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/itemid"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/itemName"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/itemPrice"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

Item.java 代码如下：

public class Item  {

    private int id;
    private String name;
    private double price;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }
}

ItemAdapter.java代码如下：

public class ItemAdapter extends ArrayAdapter <Item>{
        private int resource;
    public ItemAdapter(Context context, int resource,Item[] items) {
        super(context, resource, items);
        this.resource=resource;
    }

    @NonNull
    @Override
    public View getView(int position, View convertView,ViewGroup parent) {
//        return super.getView(position, convertView, parent);
        convertView=LayoutInflater.from(getContext()).inflate(this.resource,parent,false);
//        TextView itemid=convertView.findViewById(R.id.itemid);
//        itemid.setText(getItem(position).getId());
        TextView itemName=convertView.findViewById(R.id.itemName);
        itemName.setText(getItem(position).getName());
        TextView itemPrice=convertView.findViewById(R.id.itemPrice);
        itemPrice.setText(getItem(position).getPrice()+" ");
        return convertView;
    }
}

Screenshot_1556443885.png