本文采用一個Demo來展示Android中ExpandableListView控件的使用,如如何在組/子ListView中綁定數據源。直接上代碼如下:
程序結構圖:
layout目錄下的 main.xml 文件源碼如下:
- <?xml?version="1.0"?encoding="utf-8"?>??
- <LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"??
- ????android:orientation="vertical"??
- ????android:layout_width="fill_parent"??
- ????android:layout_height="fill_parent">??
- ????<!--?我們會自己定義listview的顯示方式(在另外一個布局文件里邊)不用默認的方式???
- ?????????如果自定義listview的顯示方式這里這個android:id="@id/android:list"?必須這樣寫?-->??
- ????<!--?android:drawSelectOnTop="false"此屬性用來設置listview上的背景顏色會不會??
- ?????擋住(覆蓋)內容?,?如果這是為false就表示不會覆蓋掉?-->???
- ????<ExpandableListView???
- ????????android:id="@id/android:list"?????????????????
- ????????android:layout_width="fill_parent"??????????????????
- ????????android:layout_height="wrap_content"????????????????
- ????????android:layout_weight="1"?????????????????
- ????????android:drawSelectorOnTop="false"/>???
- </LinearLayout>??
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="fill_parent"android:layout_height="fill_parent"><!-- 我們會自己定義listview的顯示方式(在另外一個布局文件里邊)不用默認的方式 如果自定義listview的顯示方式這里這個android:id="@id/android:list" 必須這樣寫 --><!-- android:drawSelectOnTop="false"此屬性用來設置listview上的背景顏色會不會擋住(覆蓋)內容 , 如果這是為false就表示不會覆蓋掉 --> <ExpandableListView android:id="@id/android:list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" android:drawSelectorOnTop="false"/>
</LinearLayout>
android.intent.category.DEFAULT、包 com.andyidea.demo中ContactsActivity.java源碼如下:
- package?com.andyidea.demo;??
- ??
- import?java.util.ArrayList;??
- import?java.util.List;??
- ??
- import?android.app.ExpandableListActivity;??
- import?android.os.Bundle;??
- import?android.view.Gravity;??
- import?android.view.View;??
- import?android.view.ViewGroup;??
- import?android.view.Window;??
- import?android.widget.AbsListView;??
- import?android.widget.BaseExpandableListAdapter;??
- import?android.widget.TextView;??
- ??
- public?class?ContactsActivity?extends?ExpandableListActivity?{??
- ??????
- ????List<String>?group;???????????//組列表??
- ????List<List<String>>?child;?????//子列表??
- ????ContactsInfoAdapter?adapter;??//數據適配器??
- ??????
- ????/**?Called?when?the?activity?is?first?created.?*/??
- ????@Override??
- ????public?void?onCreate(Bundle?savedInstanceState)?{??
- ????????super.onCreate(savedInstanceState);??
- ????????requestWindowFeature(Window.FEATURE_NO_TITLE);??//設置為無標題??
- ????????setContentView(R.layout.main);??
- ????????getExpandableListView().setBackgroundResource(R.drawable.default_bg);??
- ??????????
- ????????initializeData();??
- ????????getExpandableListView().setAdapter(new?ContactsInfoAdapter());??
- ????????getExpandableListView().setCacheColorHint(0);??//設置拖動列表的時候防止出現黑色背景??
- ????}??
- ??????
- ????/**??
- ?????*?初始化組、子列表數據??
- ?????*/??
- ????private?void?initializeData(){??
- ????????group?=?new?ArrayList<String>();??
- ????????child?=?new?ArrayList<List<String>>();??
- ??????????
- ????????addInfo("Andy",new?String[]{"male","138123***","GuangZhou"});??
- ????????addInfo("Fairy",new?String[]{"female","138123***","GuangZhou"});??
- ????????addInfo("Jerry",new?String[]{"male","138123***","ShenZhen"});??
- ????????addInfo("Tom",new?String[]{"female","138123***","ShangHai"});??
- ????????addInfo("Bill",new?String[]{"male","138231***","ZhanJiang"});??
- ??????????
- ????}??
- ??????
- ????/**??
- ?????*?模擬給組、子列表添加數據??
- ?????*?@param?g-group??
- ?????*?@param?c-child??
- ?????*/??
- ????private?void?addInfo(String?g,String[]?c){??
- ????????group.add(g);??
- ????????List<String>?childitem?=?new?ArrayList<String>();??
- ????????for(int?i=0;i<c.length;i++){??
- ????????????childitem.add(c[i]);??
- ????????}??
- ????????child.add(childitem);??
- ????}??
- ??????
- ????class?ContactsInfoAdapter?extends?BaseExpandableListAdapter{??
- ??
- ??????????
- ????????//-----------------Child----------------//??
- ????????@Override??
- ????????public?Object?getChild(int?groupPosition,?int?childPosition)?{??
- ????????????return?child.get(groupPosition).get(childPosition);??
- ????????}??
- ??????????
- ????????@Override??
- ????????public?long?getChildId(int?groupPosition,?int?childPosition)?{??
- ????????????return?childPosition;??
- ????????}??
- ??????????
- ????????@Override??
- ????????public?int?getChildrenCount(int?groupPosition)?{??
- ????????????return?child.get(groupPosition).size();??
- ????????}??
- ??????????
- ????????@Override??
- ????????public?View?getChildView(int?groupPosition,?int?childPosition,??
- ????????????????boolean?isLastChild,?View?convertView,?ViewGroup?parent)?{??
- ????????????String?string?=?child.get(groupPosition).get(childPosition);???
- ????????????return?getGenericView(string);??
- ????????}??
- ??????????
- ????????//----------------Group----------------//??
- ????????@Override??
- ????????public?Object?getGroup(int?groupPosition)?{??
- ????????????return?group.get(groupPosition);??
- ????????}?????????????????
- ??
- ????????@Override??
- ????????public?long?getGroupId(int?groupPosition)?{??
- ????????????return?groupPosition;??
- ????????}?????
- ??????????
- ????????@Override??
- ????????public?int?getGroupCount()?{??
- ????????????return?group.size();??
- ????????}?????
- ??????????
- ????????@Override??
- ????????public?View?getGroupView(int?groupPosition,?boolean?isExpanded,??
- ????????????????View?convertView,?ViewGroup?parent)?{??
- ????????????String?string?=?group.get(groupPosition);????
- ????????????return?getGenericView(string);??
- ????????}??
- ??
- ????????//創建組/子視圖????
- ????????public?TextView?getGenericView(String?s)?{????
- ????????????//?Layout?parameters?for?the?ExpandableListView????
- ????????????AbsListView.LayoutParams?lp?=?new?AbsListView.LayoutParams(????
- ????????????????????ViewGroup.LayoutParams.FILL_PARENT,?40);??
- ????
- ????????????TextView?text?=?new?TextView(ContactsActivity.this);????
- ????????????text.setLayoutParams(lp);????
- ????????????//?Center?the?text?vertically????
- ????????????text.setGravity(Gravity.CENTER_VERTICAL?|?Gravity.LEFT);????
- ????????????//?Set?the?text?starting?position????
- ????????????text.setPadding(36,?0,?0,?0);????
- ????????????????
- ????????????text.setText(s);????
- ????????????return?text;????
- ????????}????
- ??????????
- ??????????
- ????????@Override??
- ????????public?boolean?hasStableIds()?{??
- ????????????//?TODO?Auto-generated?method?stub??
- ????????????return?false;??
- ????????}?????????
- ??
- ????????@Override??
- ????????public?boolean?isChildSelectable(int?groupPosition,?int?childPosition)?{??
- ????????????//?TODO?Auto-generated?method?stub??
- ????????????return?true;??
- ????????}??
- ??????????
- ????}??
- }??
package com.andyidea.demo;import java.util.ArrayList;
import java.util.List;import android.app.ExpandableListActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;public class ContactsActivity extends ExpandableListActivity {List<String> group; //組列表List<List<String>> child; //子列表ContactsInfoAdapter adapter; //數據適配器/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE); //設置為無標題setContentView(R.layout.main);getExpandableListView().setBackgroundResource(R.drawable.default_bg);initializeData();getExpandableListView().setAdapter(new ContactsInfoAdapter());getExpandableListView().setCacheColorHint(0); //設置拖動列表的時候防止出現黑色背景}/*** 初始化組、子列表數據*/private void initializeData(){group = new ArrayList<String>();child = new ArrayList<List<String>>();addInfo("Andy",new String[]{"male","138123***","GuangZhou"});addInfo("Fairy",new String[]{"female","138123***","GuangZhou"});addInfo("Jerry",new String[]{"male","138123***","ShenZhen"});addInfo("Tom",new String[]{"female","138123***","ShangHai"});addInfo("Bill",new String[]{"male","138231***","ZhanJiang"});}/*** 模擬給組、子列表添加數據* @param g-group* @param c-child*/private void addInfo(String g,String[] c){group.add(g);List<String> childitem = new ArrayList<String>();for(int i=0;i<c.length;i++){childitem.add(c[i]);}child.add(childitem);}class ContactsInfoAdapter extends BaseExpandableListAdapter{//-----------------Child----------------//@Overridepublic Object getChild(int groupPosition, int childPosition) {return child.get(groupPosition).get(childPosition);}@Overridepublic long getChildId(int groupPosition, int childPosition) {return childPosition;}@Overridepublic int getChildrenCount(int groupPosition) {return child.get(groupPosition).size();}@Overridepublic View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {String string = child.get(groupPosition).get(childPosition); return getGenericView(string);}//----------------Group----------------//@Overridepublic Object getGroup(int groupPosition) {return group.get(groupPosition);} @Overridepublic long getGroupId(int groupPosition) {return groupPosition;} @Overridepublic int getGroupCount() {return group.size();} @Overridepublic View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {String string = group.get(groupPosition); return getGenericView(string);}//創建組/子視圖 public TextView getGenericView(String s) { // Layout parameters for the ExpandableListView AbsListView.LayoutParams lp = new AbsListView.LayoutParams( ViewGroup.LayoutParams.FILL_PARENT, 40);TextView text = new TextView(ContactsActivity.this); text.setLayoutParams(lp); // Center the text vertically text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT); // Set the text starting position text.setPadding(36, 0, 0, 0); text.setText(s); return text; } @Overridepublic boolean hasStableIds() {// TODO Auto-generated method stubreturn false;} @Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn true;}}
}
最后,程序運行后截圖如下:
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