BaseAdapter使用案例

来源：互联网发布：QT与数据库实现通讯录编辑：程序博客网时间：2024/06/05 02:51
在页面布局上用ListView显示adapter传过来的数据。
<? xml version= "1.0" encoding= "utf-8" ?><LinearLayout xmlns: android ="http://schemas.android.com/apk/res/android"   android :orientation= "vertical"    android :layout_width= "match_parent"    android :layout_height= "match_parent"    >    <ListView        android :id= "@+id/myList"        android :layout_width= "match_parent"        android :layout_height= "match_parent" >    </ListView></LinearLayout>通过BaseAdapter将数据传递到ListView上package com.eson.baseadapter ;import android.graphics.Color ;import android.os.Bundle ;import android.support.v7.app.AppCompatActivity ;import android.view.View ;import android.view.ViewGroup ;import android.widget.BaseAdapter ;import android.widget.ImageView ;import android.widget.LinearLayout ;import android.widget.ListView ;import android.widget.TextView ;public class BaseAdapterTest extends AppCompatActivity {    private ListView myList;    @Override    protected void onCreate (Bundle savedInstanceState) {        super .onCreate(savedInstanceState) ;        setContentView(R.layout. activity_main );        myList = (ListView)findViewById(R.id. myList );        final BaseAdapter adapter = new BaseAdapter() {            @Override            public int getCount () {                return 40 ;//显示的行数            }            @Override            public Object getItem( int position) {                return null;            }            //重写该方法，该方法返回的View将作为列表框            @Override            public long getItemId (int position) {                return position ;            }            @Override            public View getView( int position, View convertView , ViewGroup parent) {                //创建一个LinearLayout，并向其中添加两个组件                LinearLayout line = new LinearLayout(BaseAdapterTest. this );                line.setOrientation(LinearLayout. HORIZONTAL) ;                ImageView image = new ImageView(BaseAdapterTest. this );                image.setImageResource(R.drawable. show) ;                TextView text = new TextView(BaseAdapterTest. this );                text.setText("第" +(position+ 1)+ "个列表项" ) ;                text.setTextSize(20 ) ;                text.setTextColor(Color. RED) ;                line.addView(image);                line.addView(text);                //返回LinearLayout实例                return line ;            }        };       myList .setAdapter(adapter) ;    }}
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