這篇的內容是修改自前面的 [Android Tips] 如何自訂ListView的內容 (使用ArrayAdapter同時加入Image和Text)這篇主旨是要使用SimpleAdapter來實現 , 此外可以動態的新增和刪除資料 , 首先Layout檔案的內容沒有更改和之前的文章一樣 , 至於程式碼的部分如下
package com.android;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.TabActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TabHost;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
public class TabWidgetListViewTest extends TabActivity implements Button.OnClickListener
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
EPlayer = getResources().getStringArray(R.array.EPlayer);
WPlayer = getResources().getStringArray(R.array.WPlayer);
Postion = getResources().getStringArray(R.array.Position);
//分別將東西區先發球員和球員位置的資料當作ListView 的內容
//res/values/strings.xml 已經宣告了string-array
icons = new int[]{R.drawable.marketplace , R.drawable.email , R.drawable.contacts , R.drawable.mms , R.drawable.application};
//首先我們先處理ListView所要呈現的內容
ListTextImageItemEast = new ArrayList[HashMap[String, Object]();
//宣告ArrayList裡面的元素為HashMap
for(int i = 0;i < 5;i++)
{
HashMap[String, Object] map = new HashMap[String, Object]();
// key使用String變數 , element存放Object元素
map.put("ImageItem", icons[i]);
map.put("PlayerItem",EPlayer[i]);
map.put("PostionItem", Postion[i]);
ListTextImageItemEast.add(map); // 加入到ArrayList中
}
ListEPlayer = (ListView) findViewById(R.id.ListViewEast);
SAE = new SimpleAdapter(this,
ListTextImageItemEast, //使用的ArrayList
R.layout.listviewrow, //相對應的Layout檔案
new String[] {"ImageItem","PlayerItem","PostionItem"},
new int[] {R.id.icon,R.id.name,R.id.position});
// 每個HashMap中的Title對應到RowView裡的subView Id
ListEPlayer.setAdapter(SAE);
ListEPlayer.setOnItemClickListener(OICL);
//然後再判斷Item點擊事件
ListEPlayer.setTextFilterEnabled(true);
//添加按鍵過濾的功能
ListWPlayer = (ListView) findViewById(R.id.ListViewWest);
ListTextImageItemWest = new ArrayList[HashMap[String, Object]]();
for(int i = 0;i < 5;i++)
{
HashMap[String, Object] map = new HashMap[String, Object]();
map.put("ImageItem", icons[i]);
map.put("PlayerItem",WPlayer[i]);
map.put("PostionItem", Postion[i]);
ListTextImageItemWest.add(map);
}
ListWPlayer = (ListView) findViewById(R.id.ListViewWest);
SAW = new SimpleAdapter(this,
ListTextImageItemWest,
R.layout.listviewrow,
new String[] {"ImageItem","PlayerItem", "PostionItem"},
new int[] {R.id.icon,R.id.name,R.id.position});
ListWPlayer.setAdapter(SAW);
ListWPlayer.setOnItemClickListener(OICL);
ListWPlayer.setTextFilterEnabled(true);
//對另一個ListView做同樣的操作載入西區先發球員的資料
mTabHost = getTabHost();
//我們的TabWidgetListViewTest 是繼承 TabActivity的
//所以這邊是透過他的method getTabHost()
//來取得我們在main.xml中宣告的TabHost
mTabHost.addTab(mTabHost.newTabSpec("tab_test1")
//將Tab加入我們要的資料
.setIndicator("東區先發球員" , this.getResources().getDrawable(R.drawable.aemail))
//在Tab上標示名稱和加上Icon
.setContent(R.id.ListViewEast));
//Tab內容為main.xml檔案中宣告的ListView , 而ListView的內容我們先前已經處理好了
mTabHost.addTab(mTabHost.newTabSpec("tab_test2").setIndicator("西區先發球員" , this.getResources().getDrawable(R.drawable.browser)).setContent(R.id.ListViewWest));
mTabHost.setCurrentTab(0);
//預設該顯示哪個Tab的資料
Button buttongernerate = (Button) findViewById(R.id.buttongernerate);
Button buttondelete = (Button) findViewById(R.id.buttondelete);
buttongernerate.setOnClickListener(this);
buttondelete.setOnClickListener(this);
//對新增和刪除按鈕設置點擊事件
}
TabHost mTabHost;
ListView ListEPlayer , ListWPlayer , TempLV;
SimpleAdapter SAE , SAW , TempA;
String[] EPlayer , WPlayer , Postion;
int[] icons;
ArrayList[HashMap[String, Object]] ListTextImageItemEast;
ArrayList[HashMap[String, Object]] ListTextImageItemWest;
HashMap TempHMap;
boolean Choose = false; //按鈕開關
int TempPosition;
public OnItemClickListener OICL = new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView[?] parent, View view, int position, long id)
{
String where;
if(parent.equals(ListEPlayer))
where = "你選擇了東區的";
else
where = "你選擇了西區的";
TempHMap = (HashMap [String, Object]) parent.getItemAtPosition(position);
setTitle(where + ((TextView)view.findViewById(R.id.position)).getText()
+ ":" + TempHMap.get("PlayerItem"));
//這邊提供兩種方法來取得被點選RowView的內容
/*
* getItemAtPosition(position)在官網的敘述是這樣的
* Gets the data associated with the specified position in the list.
* 上面所說的the data就是當初我們 super(context, textViewResourceId, itemname);
* 所回傳的itemname了 , 可以參考父類別ArrayAdapter的建構子
* ArrayAdapter(Context context, int textViewResourceId, T[] objects)
* */
TempLV = (ListView) parent;
TempPosition = position;
Choose = true;
}
};
@Override
public void onClick(View ButtonView)
{
// TODO Auto-generated method stub
if(Choose)
{
switch(ButtonView.getId())
{
case R.id.buttongernerate: //新增所選擇的資料
if(TempLV.equals(ListEPlayer))
{
ListTextImageItemEast.add(TempHMap);;
TempA = SAE;
}
else
{
ListTextImageItemWest.add(TempHMap);;
TempA = SAW;
}
TempA.notifyDataSetChanged();
//提醒SimpleAdapter作資料得更新
break;
case R.id.buttondelete: //刪除所選擇的資料
if(TempLV.equals(ListEPlayer))
{
ListTextImageItemEast.remove(TempPosition);
TempA = SAE;
}
else
{
ListTextImageItemWest.remove(TempPosition);
TempA = SAW;
}
TempA.notifyDataSetChanged();
break;
}
}
Choose = false;
//Log.d("Choose" , Choose+"");
}
} 當你點選了ListView中的Item之後 , 新增或是刪除的按鈕才會發揮作用
此外為了避免 HTML Tag is broken的錯誤 , 所以使用[] 代替<> , 程式要能work需要作符號的修改
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