第一阶段冲刺第七天

ListView用法，适配器的简单使用代码

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package com.example.twj.testyixue;           import android.app.Activity;         import android.os.Bundle;         import android.widget.ListView;   /**  * Created by t'w'j on 2020/4/18.  */ public class ListViewDemoActivity extends Activity {     private ListView mphoneBookListView;       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_listview_demo);           mphoneBookListView=(ListView)findViewById(R.id.list_view);           PhoneBookAdapter phoneBookAdapter=new PhoneBookAdapter(ListViewDemoActivity.this);         mphoneBookListView.setAdapter(phoneBookAdapter);       } }