BaseAdapter适配器 添加数据 显示到ListView中

布局界面，这是一个图片加三个文本

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <RelativeLayout        android:layout_width="fill_parent"        android:layout_height="wrap_content" >        <ImageView            android:id="@+id/IV_head"            android:layout_width="wrap_content"            android:layout_height="60sp"            android:layout_alignParentLeft="true"            android:layout_alignParentTop="true" />        <TextView            android:id="@+id/NatName"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_margin="5sp"            android:layout_toRightOf="@id/IV_head"            android:textSize="16sp" />        <TextView            android:id="@+id/TVContent"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_below="@id/NatName"            android:layout_margin="5sp"            android:layout_toRightOf="@id/IV_head" />        <TextView            android:id="@+id/Time"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentRight="true"            android:layout_margin="5sp" />    </RelativeLayout></LinearLayout>

适配器与填充的假数据

package com.example.connection_adapter;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import com.example.hello.R;import android.content.Context;import android.text.NoCopySpan.Concrete;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.view.View.OnClickListener;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ImageView;import android.widget.TextView;public class Connection_adapter extends BaseAdapter {//对话窗口适配器private Context context;private LayoutInflater inflater;private List<Map<String, Object>> list;

              //假的数据进行填充     public void getData() {list = new ArrayList<Map<String, Object>>();Map<String, Object> map1 = new HashMap<String, Object>();map1.put("IV_head", R.drawable.head);map1.put("NatName", "沙皮狗的忧伤");map1.put("TVContent", "你好啊");map1.put("Time", "19:11:04");list.add(map1);Map<String, Object> map2 = new HashMap<String, Object>();map2.put("IV_head", R.drawable.head);map2.put("NatName", "沙皮狗的悲伤");map2.put("TVContent", "我不好");map2.put("Time", "19:11:04");list.add(map2);}public Connection_adapter(Context context, List<Map<String, Object>> list) {getData();this.context = context;inflater = LayoutInflater.from(context);// this.list = list;}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn list.size();}@Overridepublic Object getItem(int arg0) {// TODO Auto-generated method stubreturn list.get(arg0);}@Overridepublic long getItemId(int arg0) {// TODO Auto-generated method stubreturn arg0;}@Overridepublic View getView(int position, View convertView, ViewGroup arg2) {// TODO Auto-generated method stubfinal int selectId = position;ViewHolder holder;View view;

                 //判断是ListView界面里是否已经创建View视图，优化ListView,防止重复创建         

if (convertView == null) {view = inflater.inflate(R.layout.activity_connection, null);holder = new ViewHolder();holder.IV_head = (ImageView) view.findViewById(R.id.IV_head);holder.NatName = (TextView) view.findViewById(R.id.NatName);holder.TVContent = (TextView) view.findViewById(R.id.TVContent);holder.Time = (TextView) view.findViewById(R.id.Time);view.setTag(holder);} else {view = convertView;holder = (ViewHolder) view.getTag();}//list.get(position);//System.out.println("查看List中是否有数据：：list.get(position)" + position);holder.NatName.setText((String) list.get(position).get("NatName"));holder.TVContent.setText((String) list.get(position).get("TVContent"));holder.Time.setText((String) list.get(position).get("Time"));holder.IV_head.setImageResource((Integer) list.get(position).get("IV_head"));return view;}class ViewHolder {ImageView IV_head;TextView NatName, TVContent, Time;}}

 

Activit界面

package com.example.connection_adapter;import java.util.List;import java.util.Map;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ListView;import com.example.chat.Chat_Activity;import com.example.hello.R;//对话窗口启动public class Conection_click extends Activity {private ListView connection_list;private Connection_adapter adapter;private List<Map<String, Object>> list;protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_listview_connection);connection_list = (ListView) findViewById(R.id.connection_list);System.out.println("list的大小是" + list.size());adapter = new Connection_adapter(Conection_click.this, list);connection_list.setAdapter(adapter);

                  //item中的监听器，监听到并跳转的下个界面，connection_list.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {Intent intent = new Intent();intent.setClass(Conection_click.this, Chat_Activity.class);startActivity(intent);}});}}