可展開式清單
main.xml:定義Activity的介面佈局:
<?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" >
<ExpandableListView
android:id="@+id/mExpandableListView"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
group.xml:定義一級清單的佈局方式
<?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="horizontal" >
<TextView
android:id="@+id/group_tv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="10px"
android:paddingLeft="60px"
android:paddingTop="10px"
android:textSize="26sp" />
</LinearLayout>
child.xml:定義二級清單的佈局方式:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<ImageView
android:id="@+id/child_iv"
android:layout_width="70px"
android:layout_height="70px"
android:layout_gravity="center_vertical"
android:paddingBottom="5px"
android:paddingLeft="30px"
android:paddingTop="2px"
android:src="@drawable/icon" />
<TextView
android:id="@+id/child_tv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_vertical"
android:paddingBottom="5px"
android:paddingLeft="30px"
android:paddingTop="10px"
android:textSize="30sp" />
</LinearLayout>
Activity代碼：
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.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class TestExpandableListView extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ExpandableListView elv = (ExpandableListView) findViewById(R.id.mExpandableListView);
// 準備一級清單中顯示的資料:2個一級清單,分別顯示"group1"和"group2"
List<Map<String, String>> groups = new ArrayList<Map<String, String>>();
Map<String, String> group1 = new HashMap<String, String>();
group1.put("group", "group1");
Map<String, String> group2 = new HashMap<String, String>();
group2.put("group", "group2");
groups.add(group1);
groups.add(group2);
// 準備第一個一級清單中的二級清單資料:兩個二級清單,分別顯示"childData1"和"childData2"
List<Map<String, String>> child1 = new ArrayList<Map<String, String>>();
Map<String, String> child1Data1 = new HashMap<String, String>();
child1Data1.put("child", "child1Data1");
Map<String, String> child1Data2 = new HashMap<String, String>();
child1Data2.put("child", "child1Data2");
child1.add(child1Data1);
child1.add(child1Data2);
// 準備第二個一級清單中的二級清單資料:一個二級清單,顯示"child2Data1"
List<Map<String, String>> child2 = new ArrayList<Map<String, String>>();
Map<String, String> child2Data1 = new HashMap<String, String>();
child2Data1.put("child", "child2Data1");
child2.add(child2Data1);
// 用一個list物件保存所有的二級清單資料
List<List<Map<String, String>>> childs = new ArrayList<List<Map<String, String>>>();
childs.add(child1);
childs.add(child2);
ExpandableAdapter viewAdapter = new ExpandableAdapter(this, groups,
childs);
elv.setAdapter(viewAdapter);
}
// 自訂的ExpandListAdapter
class ExpandableAdapter extends BaseExpandableListAdapter {
private Context context;
List<Map<String, String>> groups;
List<List<Map<String, String>>> childs;
/*
* 構造函數: 參數1:context物件 參數2:一級清單資料來源 參數3:二級清單資料來源
*/
public ExpandableAdapter(Context context,
List<Map<String, String>> groups,
List<List<Map<String, String>>> childs) {
this.groups = groups;
this.childs = childs;
this.context = context;
}
public Object getChild(int groupPosition, int childPosition) {
return childs.get(groupPosition).get(childPosition);
}
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
// 獲取二級清單的View物件
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
@SuppressWarnings("unchecked")
String text = ((Map<String, String>) getChild(groupPosition,
childPosition)).get("child");
LayoutInflater layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// 獲取二級清單對應的佈局檔, 並將其各元素設置相應的屬性
LinearLayout linearLayout = (LinearLayout) layoutInflater.inflate(
R.layout.child, null);
TextView tv = (TextView) linearLayout.findViewById(R.id.child_tv);
tv.setText(text);
ImageView imageView = (ImageView) linearLayout
.findViewById(R.id.child_iv);
imageView.setImageResource(R.drawable.icon);
return linearLayout;
}
public int getChildrenCount(int groupPosition) {
return childs.get(groupPosition).size();
}
public Object getGroup(int groupPosition) {
return groups.get(groupPosition);
}
public int getGroupCount() {
return groups.size();
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
// 獲取一級清單View物件
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String text = groups.get(groupPosition).get("group");
LayoutInflater layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// 獲取一級清單佈局檔,設置相應元素屬性
LinearLayout linearLayout = (LinearLayout) layoutInflater.inflate(
R.layout.group, null);
TextView textView = (TextView) linearLayout
.findViewById(R.id.group_tv);
textView.setText(text);
return linearLayout;
}
public boolean hasStableIds() {
return false;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
}
}
只展開一組
ExpandableListView elv = (ExpandableListView) findViewById(R.id.mExpandableListView);
elv.setOnGroupExpandListener(new OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
for (int i = 0; i < GroupCount; i++) {
if (groupPosition != i) {
elv.collapseGroup(i);
}
}
}
});
資料來源：http://blog.csdn.net/android_007/article/details/7321245