Android入门之Adapter的简单使用教程

package org.mk.android.demo.demobasicadapter;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
 
import java.util.ArrayList;
import java.util.List;
 
public class MainActivity extends AppCompatActivity {
    List<String> titleList=new ArrayList<String>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //要显示的数据
        titleList.add("雷神");
        titleList.add("基神");
        titleList.add("基神");
        ArrayAdapter<String> adapter = new ArrayAdapter<String>
                (this,android.R.layout.simple_expandable_list_item_1,titleList);
        //获取ListView对象，通过调用setAdapter方法为ListView设置Adapter设置适配器
        ListView listView = (ListView) findViewById(R.id.listView);
        listView.setAdapter(adapter);
    }
}

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">
 
    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>