在某些场景下，单一文字的ListView Item已不适合当前需求，因此需要我们自定义Item布局来满足需求。下面我们来实现一个带图标和文字的Item。
二、代码展示定义包含ListView的布局文件activity_main.xml，Activity在onCreate()时加载。
<?xml version="1.0" encoding="utf-8"?><androidx.constraintlayout.widget.ConstraintLayout 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:background="#FFE4C4" tools:context=".MainActivity"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginTop="10dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginBottom="10dp" android:background="#E4DDDD"> <ListView android:id="@+id/listview" android:layout_width="match_parent" android:layout_height="match_parent"/> </LinearLayout></androidx.constraintlayout.widget.ConstraintLayout>定义Item布局文件listview_item.xml，创建SimpleAdapter对象时使用。
<?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="horizontal" android:background="#F0FFF0"> <ImageView android:id="@+id/imageview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:layout_weight="1"/> <TextView android:id="@+id/textview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:layout_weight="7" android:textColor="#FF6E40" android:textSize="24sp" android:textStyle="bold" /></LinearLayout>完善MainActivity.java代码。
package com.example.listviewdemo2;import androidx.appcompat.app.AppCompatActivity;import android.os.Bundle;import android.widget.ListView;import android.widget.SimpleAdapter;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class MainActivity extends AppCompatActivity { private ListView mListView = null; private List<Map<String, Object>> mListItems = null; private Map<String, Object> mMap = null; private SimpleAdapter mAdapter = null; /* 图片ID数组 */ private int[] mImageId = new int[] {R.drawable.num_0, R.drawable.num_1, R.drawable.num_2, R.drawable.num_3, R.drawable.num_4, R.drawable.num_5, R.drawable.num_6, R.drawable.num_7, R.drawable.num_8, R.drawable.num_9, }; /* 文字列表数组 */ private String[] mTitle = new String[] {"数字 0", "数字 1", "数字 2", "数字 3", "数字 4", "数字 5", "数字 6", "数字 7", "数字 8", "数字 9", }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); init(); } private void init() { mListView = findViewById(R.id.listview); mListItems = new ArrayList<>(); for (int i = 0; i < mImageId.length; i++) { mMap = new HashMap<>(); mMap.put("image", mImageId[i]); mMap.put("title", mTitle[i]); mListItems.add(mMap); } mAdapter = new SimpleAdapter(this, mListItems, R.layout.listview_item, new String[]{"title", "image"}, new int[]{R.id.textview, R.id.imageview}); mListView.setAdapter(mAdapter); }} 三、运行效果运行效果如下图：