android(七) Activity 与 ListActivity 使用BaseAdapter - Scripts 学盟

package com.qwj.MyAndroid.bll;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
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;
/**
* @author QWJ
* 如果需要测试setListAdapter 把 ListView01 继承 ListActivity
*/
public class ListView01 extends Activity {
private ListView listView = null;
private List<Map<String, Object>> hasmapData = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
try {
// ArrayAdapter 使用
// listView = new ListView(this);
// listView.setAdapter(new ArrayAdapter<String>(this,
// android.R.layout.simple_list_item_1, getData()));
//
// SimpleAdapter 使用
// SimpleAdapter simpleadapter = new SimpleAdapter(this,
// getHashMapData(), R.layout.tablelayout, new String[] {
// "name", "sex", "descripton" }, new int[] {
// R.id.txtName, R.id.txtSex, R.id.txtdescription });
// setListAdapter(simpleadapter);
// BaseAdapter 使用
// hasmapData = getHashMapData();
// MyAdapter adpter = new MyAdapter(this);
// setListAdapter(adpter);
setContentView(R.layout.tablelayout); //继承 Activity 必须先加载布局文件、不然后面使用的View就不能找到。
hasmapData = getHashMapData();
MyAdapter adpter = new MyAdapter(getApplicationContext());
ListView listView = (ListView) findViewById(R.id.listview);
listView.setAdapter(adpter);
} catch (Exception ex) {
System.out.println(ex.getMessage());
}
}
/**
* 获取适配器的数据
*
* @return List<String>
*/
public List<String> getData() {
List<String> resultList = new ArrayList<String>();
resultList.add("漠漠");
resultList.add("非男");
resultList.add("漠漠老撞树！");
return resultList;
}
/**
* 获取适配器的数据
*
* @return List<Map<String, Object>>
*/
public List<Map<String, Object>> getHashMapData() {
List<Map<String, Object>> resultList = new ArrayList<Map<String, Object>>();
Map<String, Object> tempData0 = new HashMap<String, Object>();
tempData0.put("name", "漠漠");
tempData0.put("sex", "非男");
tempData0.put("descripton", "漠漠老撞树！");
resultList.add(tempData0);
Map<String, Object> tempData1 = new HashMap<String, Object>();
tempData1.put("name", "漠漠");
tempData1.put("sex", "女");
tempData1.put("descripton", "漠漠老迟到！");
resultList.add(tempData1);
Map<String, Object> tempData2 = new HashMap<String, Object>();
tempData2.put("name", "漠漠");
tempData2.put("sex", "其他");
tempData2.put("descripton", "漠漠老喜欢帅哥啦！");
resultList.add(tempData2);
Map<String, Object> tempData3 = new HashMap<String, Object>();
tempData3.put("name", "漠漠");
tempData3.put("sex", "火星");
tempData3.put("descripton", "漠漠老不淡定了。！");
resultList.add(tempData3);
Map<String, Object> tempData4 = new HashMap<String, Object>();
tempData4.put("name", "漠漠");
tempData4.put("sex", "地球");
tempData4.put("descripton", "漠漠老撞树。！");
resultList.add(tempData4);
return resultList;
}
/**
* 页面缓存
* @author QWJ
*/
public final class ViewHolder {
public TextView name;
public TextView sex;
public TextView info;
// public Button viewBtn;
}
/**
* 自定义适配器
* @author QWJ
*/
public class MyAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public MyAdapter(Context context) {
mInflater = LayoutInflater.from(context); // 加载一个空页
}
@Override
public int getCount() {
// TODO Auto-generated method stub 循环多少行。
return hasmapData.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub 当前项
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub 当前第几行
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub 返回一个View
ViewHolder vh = null;
try {
//如果页面为null 创建一个缓存ViewHolder页并且设置Tag
if (convertView == null) {
vh = new ViewHolder();
convertView = mInflater
.inflate(R.layout.resultlayout, null);
vh.name = (TextView) convertView.findViewById(R.id.txtName);
vh.sex = (TextView) convertView.findViewById(R.id.txtSex);
vh.info = (TextView) convertView
.findViewById(R.id.txtdescription);
convertView.setTag(vh);
} else {
//获取Tag
vh = (ViewHolder) convertView.getTag();
}
//设置值
vh.name.setText((String) hasmapData.get(position).get("name"));
vh.sex.setText((String) hasmapData.get(position).get("sex"));
vh.info.setText((String) hasmapData.get(position).get(
"descripton"));
} catch (Exception ex) {
System.out.println(ex.getMessage());
}
return convertView;
}
}
}

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<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:shrinkColumns="1" android:orientation="vertical" >
<TableRow>
<TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="姓名"
android:layout_weight="1" android:gravity="center" android:background="#aa0000"
></TextView>
<TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="性别"
android:layout_weight="1" android:gravity="center" android:background="#00aa00"
></TextView>
<TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="描述"
android:layout_weight="1" android:gravity="center" android:background="#0000aa"
></TextView>
</TableRow>
<ListView
android:id="@+id/listview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</TableLayout>

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