Android ExpandableListView带有复选框，控制选中状态
朋友们 我正在尝试编写一个在ExpandableListView中使用复选框的应用程序，我在这里遇到了一个问题，那就是维护应用程序的复选框状态，我的示例来自，我的问题是维护复选框的选中状态，每当我选中其中一个复选框并展开列表时，复选框不具有其应有的选中状态。我试图通过添加ArrayList来保存存储的位置，并在getChildView（）中重新加载该位置，但仍然没有达到我想要的效果。这是我的密码Android ExpandableListView带有复选框，控制选中状态,android,checkbox,expandablelistview,Android,Checkbox,Expandablelistview,朋友们 我正在尝试编写一个在ExpandableListView中使用复选框的应用程序，我在这里遇到了一个问题，那就是维护应用程序的复选框状态，我的示例来自，我的问题是维护复选框的选中状态，每当我选中其中一个复选框并展开列表时，复选框不具有其应有的选中状态。我试图通过添加ArrayList来保存存储的位置，并在getChildView（）中重新加载该位置，但仍然没有达到我想要的效果。这是我的密码 public class ElistCBox extends ExpandableListActiv
public class ElistCBox extends ExpandableListActivity {
private static final String LOG_TAG = "ElistCBox";
ArrayList<String > chkState = new ArrayList<String>();
static final String colors[] = {"grey","blue","yellow","red"};
static final String shades[][] ={ { "lightgrey","#D3D3D3","dimgray","#696969", "sgi >gray 92","#EAEAEA"},
{ "dodgerblue 2","#1C86EE","steelblue >2","#5CACEE","powderblue","#B0E0E6"},
{ "yellow 1","#FFFF00", "gold 1","#FFD700","darkgoldenrod 1"," #FFB90F" },
{"indianred 1","#FF6A6A", "firebrick 1","#FF3030", "maroon","#800000" } };
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.main);
SimpleExpandableListAdapter expListAdapter = new SimpleExpandableListAdapter(
this,
createGroupList(),
R.layout.group_row, new String[] { "colorName" },
new int[] { R.id.childname }, createChildList(),
R.layout.child_row,
new String[] { "shadeName", "rgb" },
new int[] { R.id.childname, R.id.rgb }
) {
@Override public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent)
{
final View v = super.getChildView(groupPosition, childPosition, isLastChild, convertView, parent);
final CheckBox chkColor = (CheckBox)v.findViewById(R.id.check1);
if(chkState.contains(groupPosition+","+childPosition)){
chkColor.setChecked(true);
}else{
chkColor.setChecked(false);
}
chkColor.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.e("Checkbox Onclick Listener", Integer.toString(groupPosition) + " - " + Integer.toString(childPosition));
}
});
chkColor.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
Log.e("Checkbox check change Listener", Integer.toString(groupPosition) + " - " + Integer.toString(childPosition));
if(chkColor.isChecked()){
chkState.add(groupPosition+","+childPosition);
} else {
chkState.remove(groupPosition+","+childPosition);
}
}
});
return super.getChildView(groupPosition, childPosition, isLastChild, convertView, parent);
}
};
setListAdapter( expListAdapter );
}
public void onContentChanged () {
super.onContentChanged();
Log.e( LOG_TAG, "onContentChanged" );
}
public boolean onChildClick(
ExpandableListView parent,
View v,
int groupPosition,
int childPosition,
long id) {
Log.e( LOG_TAG, "onChildClick: "+childPosition );
CheckBox cb = (CheckBox)v.findViewById( R.id.check1 );
if( cb != null )
cb.toggle();
return false;
}
public void onGroupExpand (int groupPosition) {
Log.e( LOG_TAG,"onGroupExpand: "+groupPosition );
}
private List createGroupList() {
ArrayList result = new ArrayList();
for( int i = 0 ; i < colors.length ; ++i ) {
HashMap m = new HashMap();
m.put( "colorName",colors[i] );
result.add( m );
}
return (List)result;
}
private List createChildList() {
ArrayList result = new ArrayList();
for( int i = 0 ; i < shades.length ; ++i ) {
ArrayList secList = new ArrayList();
for( int n = 0 ; n < shades[i].length; n += 2 ) {
HashMap child = new HashMap();
child.put( "shadeName", shades[i][n] );
child.put( "rgb", shades[i][n+1] ); secList.add( child );
}
result.add( secList );
}
return result;
}
}
公共类ElistCBox扩展了ExpandableListActivity{
私有静态最终字符串日志\u TAG=“ElistCBox”；
ArrayList chkState=新的ArrayList（）；
静态最终字符串颜色[]={“灰色”、“蓝色”、“黄色”、“红色”}；
静态最终字符串着色[][]={{“浅灰色”、“深灰色”、“深灰色”、“深灰色”、“深灰色”、“深灰色”、“深灰色”、“深灰色”、“sgi>gray 92”、“深灰色”，
{“dodgerblue 2”、“#1C86EE”、“steelblue>2”、“#5CACEE”、“powderblue”、“#B0E0E6”}，
{“黄色1”、“金色1”、“金色1”、“黑色1”、“黑色1”、“黑色90F”}，
{“印度红1号”、“FF6A6A号”、“耐火砖1号”、“FF3030号”、“栗色”、“800000号”}；
/**在首次创建活动时调用*/
@凌驾
创建公共空间（捆绑冰柱）
{
超级冰柱；
setContentView（R.layout.main）；
SimpleExpandableListAdapter expListAdapter=新的SimpleExpandableListAdapter（
这
createGroupList（），
R.layout.group_行，新字符串[]{“colorName”}，
新建int[]{R.id.childname}，createChildList（），
R.layout.child_行，
新字符串[]{“shadeName”，“rgb”}，
新int[]{R.id.childname，R.id.rgb}
) {
@覆盖公共视图getChildView（最终int-groupPosition、最终int-childPosition、布尔isLastChild、视图转换视图、视图组父视图）
{
最终视图v=super.getChildView（groupPosition、childPosition、isLastChild、convertView、parent）；
最终复选框chkColor=（复选框）v.findviewbyd（R.id.check1）；
if（chkState.contains（groupPosition+，“+childPosition））{
chkColor.setChecked（真）；
}否则{
chkColor.setChecked（假）；
}
setOnClickListener（新的OnClickListener（）{
@凌驾
公共void onClick（视图v）{
Log.e（“复选框Onclick Listener”，Integer.toString（groupPosition）+“-”+Integer.toString（childPosition））；
}
});
setOnCheckedChangeListener（新的OnCheckedChangeListener（）{
@凌驾
检查更改后的公共无效（复合按钮视图，布尔值已检查）{
Log.e（“复选框检查更改侦听器”，Integer.toString（groupPosition）+“-”+Integer.toString（childPosition））；
if（chkColor.isChecked（））{
chkState.add（groupPosition+，“+childPosition）；
}否则{
chkState.remove（groupPosition+“，”+childPosition）；
}
}
});
返回super.getChildView（groupPosition、childPosition、isLastChild、convertView、parent）；
}
};
setListAdapter（expListAdapter）；
}
内容更改时的公共无效（）{
super.onContentChanged（）；
Log.e（Log_标签，“onContentChanged”）；
}
公共布尔onChildClick(
ExpandableListView父级，
观点五，
int-groupPosition，
int-childPosition，
长id）{
Log.e（Log_标签，onChildClick:+childPosition）；
复选框cb=（复选框）v.findViewById（R.id.check1）；
如果（cb！=null）
cb.toggle（）；
返回false；
}
public void onGroupExpand（int groupPosition）{
Log.e（Log_标签，“onGroupExpand:+groupPosition”）；
}
私有列表createGroupList（）{
ArrayList结果=新建ArrayList（）；
对于（int i=0；ipublic class MyExpandableListAdapter extends BaseExpandableListAdapter {
//Variables
// Sample data set. children[i] contains the children (String[]) for groups[i].
private String[] groups = { "People Names", "Dog Names", "Cat Names", "Fish Names" }; //headers
private String[][] children = {
{ "Arnold", "Barry", "Chuck", "David" },
{ "Ace", "Bandit", "Cha-Cha", "Deuce" },
{ "Fluffy", "Snuggles" },
{ "Goldy", "Bubbles" }
};
private String[] group_vaues = {"PN", "DN", "CN", "FN"};
private String[][] children_values = {
{ "Ar", "Ba", "Ch", "Da" },
{ "Ace", "Ban", "Cha", "Deu" },
{ "Flu", "Snu" },
{ "Gol", "Bub" }
};
ArrayList<ArrayList<Integer>> check_states = new ArrayList<ArrayList<Integer>>();
private Context context;
//Constructors
public MyExpandableListAdapter() {
}
public MyExpandableListAdapter(Context c) {
this.context = c;
}
//Set Methods
public void setGroupsAndValues(String[] g, String[] v) {
this.groups = g;
this.group_vaues = v;
}
public void setChildrenAndValues(String[][] c, String[][] v) {
this.children = c;
this.children_values = v;
//initialize the states to all 0;
for(int i = 0; i < c.length; i++) {
ArrayList<Integer> tmp = new ArrayList<Integer>();
for(int j = 0; j < c[i].length; j++) {
tmp.add(0);
}
check_states.add(tmp);
}
}
//Get Methods
public Object getChild(int groupPosition, int childPosition) {
return children[groupPosition][childPosition];
}
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
public int getChildrenCount(int groupPosition) {
return children[groupPosition].length;
}
public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
View convertView, ViewGroup parent) {
View grid;
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
grid = inflater.inflate(R.layout.specialty_list_item, parent, false);
final int grpPos = groupPosition;
final int childPos = childPosition;
TextView header = (TextView)grid.findViewById(R.id.title);
header.setText(getChild(groupPosition, childPosition).toString());
final View tick = grid.findViewById(R.id.image);
if(check_states.get(grpPos).get(childPos) == 1)
tick.setVisibility(View.VISIBLE);
else
tick.setVisibility(View.GONE);
grid.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
check_states.get(grpPos).set(childPos, 1);
tick.setVisibility(View.VISIBLE);
}
});
return grid;
}
public Object getGroup(int groupPosition) {
return groups[groupPosition];
}
public int getGroupCount() {
return groups.length;
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
ViewGroup parent) {
View grid;
if(convertView==null){
grid = new View(context);
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
grid = inflater.inflate(R.layout.specialty_header, parent, false);
}else{
grid = (View)convertView;
}
TextView header = (TextView)grid.findViewById(R.id.specialty_header);
header.setText(getGroup(groupPosition).toString());
return grid;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public boolean hasStableIds() {
return true;
}
公共类MyExpandableListAdapter扩展了BaseExpandableListAdapter{
//变数
//示例数据集.children[i]包含组[i]的子项（字符串[]）。
私有字符串[]组={“人名”、“狗名”、“猫名”、“鱼名”}；//头
私有字符串[][]子项={
{“阿诺德”、“巴里”、“查克”、“大卫”}，
{“王牌”、“强盗”、“恰恰”、“平手”}，
{“蓬松”，“依偎”}，
{“黄金”、“泡泡”}
};
私有字符串[]组值={“PN”、“DN”、“CN”、“FN”}；
私有字符串[][]子项\u值={
{“Ar”、“Ba”、“Ch”、“Da”}，
{“Ace”、“Ban”、“Cha”、“Deu”}，
{“流感”，“鼻涕”}，
{“Gol”，“Bub”}
};
ArrayList check_states=新建ArrayList（）；
私人语境；
/
public class MyExpandableListViewAdapter extends BaseExpandableListAdapter {
....
private boolean[][] checkedState;
private void prepareData() {
checkedState =new boolean[itemData.length][];
for (int i=0; i<itemData.length; i++) {
groupData.append(i, String.format("Group %d", i));
checkedState[i] = new boolean[itemData[i].length];
Arrays.fill(checkedState[i],false);
}
}
@Override
public View getChildView(final int groupPosition, final int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {
View itemView = convertView;
final ViewHolder vh;
if (itemView == null) {
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
itemView = inflater.inflate(R.layout.item_view, null);
vh = new ViewHolder();
vh.layout = (CheckableLinearLayout)itemView.findViewById(R.id.layout);
itemView.setTag(vh);
} else {
vh = (ViewHolder)itemView.getTag();
}
final ExpandableListView listView = ((ExpandableListView)((MainActivity)context).findViewById(R.id.list));
final int position = listView.getFlatListPosition(ExpandableListView.getPackedPositionForChild(groupPosition, childPosition));
listView.setItemChecked(position, checkedState[groupPosition][childPosition]);
vh.layout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
((CheckableLinearLayout)v).toggle();
checkedState[groupPosition][childPosition] = !checkedState[groupPosition][childPosition];
listView.setItemChecked(position, ((CheckableLinearLayout)v).isChecked());
}
});
return itemView;
}
...
}
ExpandableListView list;
ArrayList<YouCat> cat = new ArrayList<YouCat>();
private YourAdapter mAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout);
list = (ExpandableListView)findViewById(R.id.list);
mAdapter = new YourAdapter(this, list, cat);
if(savedInstanceState == null)
//collect your data
list.setAdapter(mAdapter);
list.setItemsCanFocus(false);
list.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE);
list.setOnChildClickListener(this);
list.setOnGroupClickListener(this);
}
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
return cat.get(groupPosition).selected;
}
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
YouCat cat = new YouCat();
YouSubCat subcat = new YouSubCat();
subcat = cat.get(groupPosition).sub.get(childPosition);
subcat.selected = !cat.get(groupPosition).sub.get(childPosition).selected;
cat.get(groupPosition).sub.set(childPosition, subcat);
boolean isGroupHasSelected = false;
for(int i = 0; i < cat.get(groupPosition).sub.size() && !isGroupHasSelected; i ++){
isGroupHasSelected = cat.get(groupPosition).sub.get(i).selected;
}
cat = cat.get(groupPosition);
cat.selected = isGroupHasSelected;
cat.set(groupPosition, cat);
//mAdapter.notifyDataSetChanged();
int position = parent.getFlatListPosition(ExpandableListView.getPackedPositionForChild(groupPosition, childPosition));
parent.setItemChecked(position, subcat.selected);
return true;
}
public void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
//restore data
cat = (ArrayList<YouCat>) savedInstanceState.getSerializable("cat");
Type selType = new TypeToken<SparseBooleanArray>() {}.getType();
SparseBooleanArray checked = new Gson().fromJson(savedInstanceState.getString("sel"), selType);
//set new data to adapter and refresh
mAdapter.refreshList(cat);
}
public void onSaveInstanceState(Bundle savedInstanceState) {
super.onSaveInstanceState(savedInstanceState);
//save data and selection from list to bundle
savedInstanceState.putSerializable("cat", cat);
savedInstanceState.putString("sel", new Gson().toJson(list.getCheckedItemPositions()).toString());
}
public class YouAdapter extends BaseExpandableListAdapter{
private Context context;
private List<YouCat> mGroupCollection;
private ExpandableListView mExpandableListView;
public YouAdapter(Context context, ExpandableListView pExpandableListView,
List<YouCat> pGroupCollection) {
this.context = context;
this.mGroupCollection = pGroupCollection;
this.mExpandableListView = pExpandableListView;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return mGroupCollection.get(groupPosition).sub.get(childPosition).name;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
class ChildHolder {
CheckBox checkBox;
TextView name, desc;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
ChildHolder childHolder;
if( convertView == null ){
convertView = LayoutInflater.from(context).inflate(R.layout.childrow, null);
childHolder = new ChildHolder();
childHolder.checkBox = (CheckBox) convertView.findViewById(R.id.myCheckBox);
childHolder.name=(TextView)convertView.findViewById(R.id.textView1);
childHolder.desc=(TextView)convertView.findViewById(R.id.textView2);
convertView.setTag(childHolder);
}else{
childHolder = (ChildHolder) convertView.getTag();
}
childHolder.name.setText(mGroupCollection.get(groupPosition).sub.get(childPosition).name);
childHolder.desc.setText(mGroupCollection.get(groupPosition).sub.get(childPosition).desc);
childHolder.checkBox.setChecked(mGroupCollection.get(groupPosition).sub.get(childPosition).selected);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return mGroupCollection.get(groupPosition).sub.size();
}
@Override
public Object getGroup(int groupPosition) {
return mGroupCollection.get(groupPosition);
}
@Override
public int getGroupCount() {
return mGroupCollection.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
class GroupHolder {
TextView title;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
GroupHolder groupHolder;
if( convertView == null ){
convertView = LayoutInflater.from(context).inflate(R.layout.grouplayout,null);
groupHolder = new GroupHolder();
groupHolder.title = (TextView)convertView.findViewById( R.id.text1 );
convertView.setTag(groupHolder);
}else{
groupHolder = (GroupHolder) convertView.getTag();
}
groupHolder.title.setText(mGroupCollection.get(groupPosition).name);
return convertView;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public void refreshList(List<YouCat> collection){
mGroupCollection = collection;
notifyDataSetChanged();
for(int g = 0; g < mGroupCollection.size(); g ++){
if(mGroupCollection.get(g).selected)
mExpandableListView.expandGroup(g);
else
mExpandableListView.collapseGroup(g);
}
}
}
public class YouCat implements Serializable {
private static final long serialVersionUID = 2070450081971040619L;
public String name = null;
public boolean selected = false;
public ArrayList<YouSubCat> sub = new ArrayList<YouSubCat>();
}
public class YouSubCat implements Serializable {
private static final long serialVersionUID = -1487507723105914936L;
public String name = null, desc = null;
public boolean selected = false;
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<CheckBox
android:id="@+id/myCheckBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:clickable="false"
android:focusable="false" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="10dp"
android:layout_toRightOf="@+id/myCheckBox"
android:text="TextView"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_alignParentRight="true"
android:layout_below="@+id/textView1"
android:text="TextView" />
</RelativeLayout>
<?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="wrap_content"
android:orientation="vertical"
android:padding="8dp" >
<TextView
android:id="@+id/text1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
final SparseBooleanArray checkedItems = list.getCheckedItemPositions();
for (int i = 0; i < checkedItems.size(); i++) {
if(checkedItems.valueAt(i))
data = ((String)list.getItemAtPosition(checkedItems.keyAt(i)));
}