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  • 29 个人通讯录列表(一)

    个人通讯录列表(一)

    MainActivity.java

    package com.example.mybooks;
    
    import androidx.appcompat.app.AppCompatActivity;
    
    import android.os.Bundle;
    import android.widget.ArrayAdapter;
    import android.widget.ListView;
    
    public class MainActivity extends AppCompatActivity {
    
        //创建ListView控件
        private ListView mylistview;
        //定义一个适配器
        private ArrayAdapter<String> myAdapter;
        //定义一个数组,用于ListView的数据源
        private String[] books = {"大洋","念念","翠花","同同","","带土","止水",};
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            //使用ListView展示通讯录
            //初识化控件
            mylistview = findViewById(R.id.mylistview);
            //创建适配器(参数1:上下文,参数2:列表项布局文件,参数3:数据源)
            myAdapter = new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1,books);
    
            //设置适配器到ListView
            mylistview.setAdapter(myAdapter);
    
        }
    }

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  • 原文地址:https://www.cnblogs.com/wangdayang/p/14594540.html
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