BaseAdapter自定义Lis他View_baseadapterr修改listview某一个item的lisview的直-优快云博客

本文链接：https://blog.youkuaiyun.com/shenya2/article/details/22898041

本文通过一个简单的示例介绍了如何使用BaseAdapter来自定义适配器，以实现Android ListView的数据展示。该示例详细展示了BaseAdapter的基本用法，包括数据填充、视图创建及绑定等关键步骤。

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平时都是用simpleAdapter，今天学习了BaseAdapter，写了个demo记录一下，以备不时之需。如果有写错的希望大家指出

AdapterActivity：

package com.example.myadapter01;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.w3c.dom.Text;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class AdapterActivity extends Activity {
	
	private List<Map<String,Object>> list = null;
	private HashMap<String, Object> map = null;
	private ListView listView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.list_view);
		list = new ArrayList<Map<String,Object>>();
		// 添加数据到list
		for(int i = 0;i<4;i++){
			map = new HashMap<String, Object>();
			map.put("name", "HJ");
			map.put("number", "1234567");
			list.add(map);
		}


		listView = (ListView)findViewById(R.id.list_view);
		Myadapter adapter = new Myadapter(this);
		listView.setAdapter(adapter);
		
	}
	// 自定义适配器
	public class Myadapter extends BaseAdapter{
		
		private LayoutInflater inflater;
		
		public Myadapter(Context context){
			inflater = LayoutInflater.from(context);
		}

		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return list.size();
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return null;
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return 0;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			// 创建View对象
			convertView = inflater.inflate(R.layout.item, null);
			if(list.get(position)!=null){
			// 添加数据
			TextView name = (TextView)convertView.findViewById(R.id.name);
			name.setText(list.get(position).get("name").toString());
			// 
			TextView number = (TextView)convertView.findViewById(R.id.number);
			number.setText(list.get(position).get("number").toString());
			}
			return convertView;
		}
		
		
	}

}

list_view.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    
    <ListView 
        android:id="@+id/list_view"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        ></ListView>

</RelativeLayout>

item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >
    <TextView 
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="25sp"
        android:text="HJ"
        />

    <TextView
        android:id="@+id/number"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_marginRight="70dp"
        android:text="1234567"
        android:textSize="25sp" />

</RelativeLayout>