【移动应用开发技术】怎么在Android中利用ExpandableListView实现单选和多选

【移动应用开发技术】怎么在Android中利用ExpandableListView实现单选和多选

这期内容当中在下将会给大家带来有关怎么在Android中利用ExpandableListView实现单选和多选，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。activity_main.xml<LinearLayout

xmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context=".MainActivity"

>

<ExpandableListView

android:id="@+id/exlistview"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:listSelector="@android:color/transparent"

>

</ExpandableListView>

</LinearLayout>group_item.xml<?xml

version="1.0"

encoding="utf-8"?>

<RelativeLayout

xmlns:android="/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:descendantFocusability="blocksDescendants"

android:padding="10dp"

>

<TextView

android:id="@+id/id_group_text"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerVertical="true"

android:layout_marginLeft="10dp"

android:padding="10dp"

android:text="hao"

android:textColor="@android:color/black"

android:textIsSelectable="true"

android:textSize="15sp"

>

</TextView>

<CheckBox

android:id="@+id/id_group_checkbox"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentRight="true"

android:layout_centerVertical="true"

/>

</RelativeLayout>listview_item.xml<?xml

version="1.0"

encoding="utf-8"?>

<RelativeLayout

xmlns:android="/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:descendantFocusability="blocksDescendants"

android:padding="10dp"

>

<TextView

android:id="@+id/id_text"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerVertical="true"

android:padding="10dp"

android:layout_marginLeft="30dp"

android:textColor="#55acac"

android:textIsSelectable="true"

android:textSize="15sp"

>

</TextView>

<CheckBox

android:id="@+id/id_checkbox"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:clickable="false"

android:layout_alignParentRight="true"

android:layout_centerVertical="true"

/>

</RelativeLayout>

MainAcitivity.javapublic

class

MainActivity

extends

Activity

{

private

List<Map<String,

String>>

parentList

=

new

ArrayList<Map<String,

String>>();

private

List<List<Map<String,

String>>>

childData

=

new

ArrayList<List<Map<String,

String>>>();

private

ExpandableListView

exListView;

private

Context

context

=

this;

private

MyAdapter

adapter;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initView();

initData();

setListener();

}

/**

*

记录正在选中的子listview的item条目

用hashset是为了去除重复值

*/

private

HashSet<String>

hashSet;

private

void

setListener()

{

exListView.setOnGroupExpandListener(new

OnGroupExpandListener()

{

@Override

public

void

onGroupExpand(int

groupPosition)

{

//存取已选定的集合

hashSet

=

new

HashSet<String>();

}

});

//

ExpandableListView的Group的点击事件

exListView.setOnGroupClickListener(new

OnGroupClickListener()

{

@Override

public

boolean

onGroupClick(ExpandableListView

parent,

View

v,

int

groupPosition,

long

id)

{

//

可以写点击后实现的功能

return

false;

}

});

//

ExpandableListView的child的点击事件

exListView.setOnChildClickListener(new

OnChildClickListener()

{

@Override

public

boolean

onChildClick(ExpandableListView

parent,

View

v,

int

groupPosition,

int

childPosition,

long

id)

{

Map<String,

String>

map

=

childData.get(groupPosition).get(

childPosition);

String

childChecked

=

map.get("isChecked");

if

("No".equals(childChecked))

{

map.put("isChecked",

"Yes");

hashSet.add("选定"

+

childPosition);

}

else

{

map.put("isChecked",

"No");

if

(hashSet.contains("选定"

+

childPosition))

{

hashSet.remove("选定"

+

childPosition);

}

}

System.out.println("选定的长度==1"

+

hashSet.size());

System.out.println("选定的长度==2"

+

childData.get(groupPosition).size());

if

(hashSet.size()

==

childData.get(groupPosition).size())

{

parentList.get(groupPosition).put("isGroupCheckd",

"Yes");

}

else

{

parentList.get(groupPosition).put("isGroupCheckd",

"No");

}

adapter.notifyDataSetChanged();

return

false;

}

});

}

//

初始化数据

private

void

initData()

{

for

(int

i

=

0;

i

<

10;

i++)

{

Map<String,

String>

groupMap

=

new

HashMap<String,

String>();

groupMap.put("groupText",

"item"

+

i);

groupMap.put("isGroupCheckd",

"No");

parentList.add(groupMap);

}

for

(int

i

=

0;

i

<

10;

i++)

{

List<Map<String,

String>>

list

=

new

ArrayList<Map<String,

String>>();

for

(int

j

=

0;

j

<

4;

j++)

{

Map<String,

String>

map

=

new

HashMap<String,

String>();

map.put("childItem",

"childItem"

+

j);

map.put("isChecked",

"No");

list.add(map);

}

childData.add(list);

}

adapter

=

new

MyAdapter();

exListView.setAdapter(adapter);

exListView.expandGroup(0);

hashSet

=

new

HashSet<String>();

}

private

void

initView()

{

exListView

=

(ExpandableListView)

findViewById(R.id.exlistview);

}

/**

*

适配adapter

*/

private

class

MyAdapter

extends

BaseExpandableListAdapter

{

@Override

public

Object

getChild(int

groupPosition,

int

childPosition)

{

//

TODO

Auto-generated

method

stub

return

childData.get(groupPosition).get(childPosition);

}

@Override

public

long

getChildId(int

groupPosition,

int

childPosition)

{

//

TODO

Auto-generated

method

stub

return

childPosition;

}

@Override

public

View

getChildView(int

groupPosition,

int

childPosition,

boolean

isLastChild,

View

convertView,

ViewGroup

parent)

{

ViewHolder

holder

=

null;

if

(convertView

==

null)

{

holder

=

new

ViewHolder();

convertView

=

View.inflate(context,

R.layout.listview_item,

null);

holder.childText

=

(TextView)

convertView

.findViewById(R.id.id_text);

holder.childBox

=

(CheckBox)

convertView

.findViewById(R.id.id_checkbox);

convertView.setTag(holder);

}

else

{

holder

=

(ViewHolder)

convertView.getTag();

}

holder.childText.setText(childData.get(groupPosition)

.get(childPosition).get("childItem"));

String

isChecked

=

childData.get(groupPosition).get(childPosition)

.get("isChecked");

if

("No".equals(isChecked))

{

holder.childBox.setChecked(false);

}

else

{

holder.childBox.setChecked(true);

}

return

convertView;

}

@Override

public

int

getChildrenCount(int

groupPosition)

{

//

TODO

Auto-generated

method

stub

return

childData.get(groupPosition).size();

}

@Override

public

Object

getGroup(int

groupPosition)

{

return

parentList.get(groupPosition);

}

@Override

public

int

getGroupCount()

{

//

TODO

Auto-generated

method

stub

return

parentList.size();

}

@Override

public

long

getGroupId(int

groupPosition)

{

//

TODO

Auto-generated

method

stub

return

groupPosition;

}

@Override

public

View

getGroupView(final

int

groupPosition,

final

boolean

isExpanded,

View

convertView,

ViewGroup

parent)

{

ViewHolder

holder

=

null;

if

(convertView

==

null)

{

holder

=

new

ViewHolder();

convertView

=

View.inflate(context,

R.layout.group_item,

null);

holder.groupText

=

(TextView)

convertView

.findViewById(R.id.id_group_text);

holder.groupBox

=

(CheckBox)

convertView

.findViewById(R.id.id_group_checkbox);

convertView.setTag(holder);

}

else

{

holder

=

(ViewHolder)

convertView.getTag();

}

holder.groupText.setText(parentList.get(groupPosition).get(

"groupText"));

final

String

isGroupCheckd

=

parentList.get(groupPosition).get(

"isGroupCheckd");

if

("No".equals(isGroupCheckd))

{

holder.groupBox.setChecked(false);

}

else

{

holder.groupBox.setChecked(true);

}

/*

*

groupListView的点击事件

*/

holder.groupBox.setOnClickListener(new

OnClickListener()

{

@Override

public

void

onClick(View

v)

{

CheckBox

groupBox

=

(CheckBox)

v

.findViewById(R.id.id_group_checkbox);

if

(!isExpanded)

{

//展开某个group

view

exListView.expandGroup(groupPosition);

}

else

{

//关闭某个group

view

exListView.collapseGroup(groupPosition);

}

if

("No".equals(isGroupCheckd))

{

exListView.expandGroup(groupPosition);

groupBox.setChecked(true);

parentList.get(groupPosition).put("isGroupCheckd",

"Yes");

Li