Android ExpandableListView Checkbox Example is covered in this post.
We will put checkboxes in the child rows of expandable listview.
We will solve the general problems like
- checkbox gets unchecked while scrolling the listview
- Different positioned or multiple checkboxes are checked when click on single box
In this example, we will put checkbox in both parent and child row. It means that we will create expandable listview with multiple checkboxes.
If you click on parent checkbox then all it’s child rows will be also checked. But you can also check few rows of child from the same parent as well.
After selecting required items, we will send these selected items to the next activity also.
First, see the output of the tutorial then we will develop it step by step.
Step 1. Create project in Android Studio.
Make a new project in android studio with empty activity as the default activity.
Step 2. Update colors.xml
Update your colors.xml file with following
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#3F51B5</color>
<color name="colorPrimaryDark">#303F9F</color>
<color name="colorAccent">#FF4081</color>
<color name="colorWhite">#fff</color>
<color name="colorBlack">#000</color>
</resources>
Step 3. Adding Images
Download Images by Clicking following link
[sociallocker]Download Images[/sociallocker]
It contains three images,
- icon_checked,
- icon_unchecked and
- icon_dot
Now, put icon_dot into mipmap folder and copy icon_checked and icon_unchecked into drawable folder.
See below image for reference
Step 4. Adding files in drawable
Make a new layout xml named background_bordered_theme.xml and add below source code in it
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<corners
android:radius="5dp" />
<stroke
android:width="1dp" />
<solid
android:color="@android:color/transparent" />
</shape>
Now create another layout xml file and give it a name custom_checkbox_theme.xml
Copy below code into it
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_checked="true"
android:drawable="@drawable/icon_checked" />
<item android:state_pressed="true"
android:drawable="@drawable/icon_checked" />
<item android:state_pressed="false"
android:drawable="@drawable/icon_unchecked" />
</selector>
Prepare third xml file named edit_text_theme.xml
Code for this file is like
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/listview_background_shape">
<stroke
android:width="0dp"
android:color="@android:color/white" />
<padding
android:bottom="2dp"
android:left="2dp"
android:right="2dp"
android:top="2dp" />
<corners android:radius="2dp" />
<solid android:color="@color/colorWhite"
android:alpha="0.3"/>
</shape>
Step 5. Making layout resources files
Create a new layout resource xml file in res->layout folder. It will be called child_list_layout_choose_category.xml
It’s code seems like
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/edit_text_theme">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.3"
android:gravity="center|right">
<ImageView
android:layout_width="15dp"
android:layout_height="15dp"
android:visibility="visible"
android:background="@mipmap/icon_dot"/>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1">
<TextView
android:id="@+id/tvSubCategoryName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="50dp"
android:layout_marginLeft="15dp"
android:gravity="center_vertical|left"
android:textColor="@color/colorBlack"/>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.3"
android:gravity="center">
<CheckBox
android:id="@+id/cbSubCategory"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:button="@drawable/custom_checkbox_theme" />
</LinearLayout>
</LinearLayout>
<View
android:id="@+id/viewDivider"
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="@color/colorBlack"/>
</LinearLayout>
Make second xml file in res->layout folder and give it sweet name like group_list_layout_choose_categories.xml
Add below code in it
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="beforeDescendants">
<View
android:layout_width="match_parent"
android:layout_height="10dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:background="@drawable/edit_text_theme">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.3"
android:gravity="center">
<ImageView
android:id="@+id/ivCategory"
android:layout_width="30dp"
android:layout_height="30dp"
android:visibility="gone"/>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1">
<TextView
android:id="@+id/tvMainCategoryName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="50dp"
android:gravity="center_vertical|left"
android:textColor="@color/colorBlack"/>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.3"
android:gravity="center">
<CheckBox
android:id="@+id/cbMainCategory"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:button="@drawable/custom_checkbox_theme" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
Prepare last xml file in res->layout and gibe its name group_list_layout_my_categories.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="beforeDescendants">
<View
android:layout_width="match_parent"
android:layout_height="10dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:background="@drawable/background_bordered_theme">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.3"
android:gravity="center">
<ImageView
android:id="@+id/ivCategory"
android:layout_width="30dp"
android:layout_height="30dp"
android:visibility="gone"/>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1">
<TextView
android:id="@+id/tvMainCategoryName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="50dp"
android:gravity="center_vertical|left"
android:textColor="@color/colorBlack"/>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.3"
android:gravity="center">
<CheckBox
android:id="@+id/cbMainCategory"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:button="@drawable/custom_checkbox_theme" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
Step 6. Making Model Classes
Make a new folder called Model in app->java->your package name (It is the same path where your MainActivity is present)
See below image where you need to put required JAVA classes
Create a new JAVA class named DataItem.java in Model folder
Add Code for it like
import java.util.List;
public class DataItem {
private String categoryId;
private String categoryName;
private String isChecked = "NO";
private List<SubCategoryItem> subCategory;
public DataItem() {
}
public String getCategoryId() {
return categoryId;
}
public void setCategoryId(String categoryId) {
this.categoryId = categoryId;
}
public String getCategoryName() {
return categoryName;
}
public void setCategoryName(String categoryName) {
this.categoryName = categoryName;
}
public String getIsChecked() {
return isChecked;
}
public void setIsChecked(String isChecked) {
this.isChecked = isChecked;
}
public List<SubCategoryItem> getSubCategory() {
return subCategory;
}
public void setSubCategory(List<SubCategoryItem> subCategory) {
this.subCategory = subCategory;
}
}
Above class is representing the model structure for parent items or main category.
Make a second Model class named SubCategoryItem.java in Model folder
Add following code in it
public class SubCategoryItem {
private String categoryId;
private String subId;
private String subCategoryName;
private String isChecked;
public String getCategoryId() {
return categoryId;
}
public void setCategoryId(String categoryId) {
this.categoryId = categoryId;
}
public String getSubId() {
return subId;
}
public void setSubId(String subId) {
this.subId = subId;
}
public String getSubCategoryName() {
return subCategoryName;
}
public void setSubCategoryName(String subCategoryName) {
this.subCategoryName = subCategoryName;
}
public String getIsChecked() {
return isChecked;
}
public void setIsChecked(String isChecked) {
this.isChecked = isChecked;
}
}
Above class will word as a model for sub category or child items.
Make a new JAVA class named “ConstantManager.java” at the path shown in above image
Code for this class will look like
import java.util.ArrayList;
import java.util.HashMap;
class ConstantManager {
public static final String CHECK_BOX_CHECKED_TRUE = "YES";
public static final String CHECK_BOX_CHECKED_FALSE = "NO";
public static ArrayList<ArrayList<HashMap<String, String>>> childItems = new ArrayList<>();
public static ArrayList<HashMap<String, String>> parentItems = new ArrayList<>();
public class Parameter {
public static final String IS_CHECKED = "is_checked";
public static final String SUB_CATEGORY_NAME = "sub_category_name";
public static final String CATEGORY_NAME = "category_name";
public static final String CATEGORY_ID = "category_id";
public static final String SUB_ID = "sub_id";
}
}
Prepare another JAVA class named MyCategoriesExpandableListAdapter.java
Add below source code in it
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.HashMap;
/**
* Created by zerones on 04-Oct-17.
*/
public class MyCategoriesExpandableListAdapter extends BaseExpandableListAdapter {
private final ArrayList<ArrayList<HashMap<String, String>>> childItems;
private ArrayList<HashMap<String, String>> parentItems;
// private final ArrayList<HashMap<String, String>> childItems;
private LayoutInflater inflater;
private Activity activity;
private HashMap<String, String> child;
private int count = 0;
private boolean isFromMyCategoriesFragment;
public MyCategoriesExpandableListAdapter(Activity activity, ArrayList<HashMap<String, String>> parentItems,
ArrayList<ArrayList<HashMap<String, String>>> childItems,boolean isFromMyCategoriesFragment) {
this.parentItems = parentItems;
this.childItems = childItems;
this.activity = activity;
this.isFromMyCategoriesFragment = isFromMyCategoriesFragment;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getGroupCount() {
return parentItems.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return (childItems.get(groupPosition)).size();
}
@Override
public Object getGroup(int i) {
return null;
}
@Override
public Object getChild(int i, int i1) {
return null;
}
@Override
public long getGroupId(int i) {
return 0;
}
@Override
public long getChildId(int i, int i1) {
return 0;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public View getGroupView(final int groupPosition, final boolean b, View convertView, ViewGroup viewGroup) {
final ViewHolderParent viewHolderParent;
if (convertView == null) {
if(isFromMyCategoriesFragment) {
convertView = inflater.inflate(R.layout.group_list_layout_my_categories, null);
}else {
convertView = inflater.inflate(R.layout.group_list_layout_choose_categories, null);
}
viewHolderParent = new ViewHolderParent();
viewHolderParent.tvMainCategoryName = convertView.findViewById(R.id.tvMainCategoryName);
viewHolderParent.cbMainCategory = convertView.findViewById(R.id.cbMainCategory);
viewHolderParent.ivCategory = convertView.findViewById(R.id.ivCategory);
convertView.setTag(viewHolderParent);
} else {
viewHolderParent = (ViewHolderParent) convertView.getTag();
}
if (parentItems.get(groupPosition).get(ConstantManager.Parameter.IS_CHECKED).equalsIgnoreCase(ConstantManager.CHECK_BOX_CHECKED_TRUE)) {
viewHolderParent.cbMainCategory.setChecked(true);
notifyDataSetChanged();
} else {
viewHolderParent.cbMainCategory.setChecked(false);
notifyDataSetChanged();
}
viewHolderParent.cbMainCategory.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (viewHolderParent.cbMainCategory.isChecked()) {
parentItems.get(groupPosition).put(ConstantManager.Parameter.IS_CHECKED, ConstantManager.CHECK_BOX_CHECKED_TRUE);
for (int i = 0; i < childItems.get(groupPosition).size(); i++) {
childItems.get(groupPosition).get(i).put(ConstantManager.Parameter.IS_CHECKED, ConstantManager.CHECK_BOX_CHECKED_TRUE);
}
notifyDataSetChanged();
}
else {
parentItems.get(groupPosition).put(ConstantManager.Parameter.IS_CHECKED, ConstantManager.CHECK_BOX_CHECKED_FALSE);
for (int i = 0; i < childItems.get(groupPosition).size(); i++) {
childItems.get(groupPosition).get(i).put(ConstantManager.Parameter.IS_CHECKED, ConstantManager.CHECK_BOX_CHECKED_FALSE);
}
notifyDataSetChanged();
}
}
});
ConstantManager.childItems = childItems;
ConstantManager.parentItems = parentItems;
viewHolderParent.tvMainCategoryName.setText(parentItems.get(groupPosition).get(ConstantManager.Parameter.CATEGORY_NAME));
return convertView;
}
@Override
public View getChildView(final int groupPosition, final int childPosition, final boolean b, View convertView, ViewGroup viewGroup) {
final ViewHolderChild viewHolderChild;
child = childItems.get(groupPosition).get(childPosition);
if (convertView == null) {
convertView = inflater.inflate(R.layout.child_list_layout_choose_category, null);
viewHolderChild = new ViewHolderChild();
viewHolderChild.tvSubCategoryName = convertView.findViewById(R.id.tvSubCategoryName);
viewHolderChild.cbSubCategory = convertView.findViewById(R.id.cbSubCategory);
viewHolderChild.viewDivider = convertView.findViewById(R.id.viewDivider);
convertView.setTag(viewHolderChild);
} else {
viewHolderChild = (ViewHolderChild) convertView.getTag();
}
if (childItems.get(groupPosition).get(childPosition).get(ConstantManager.Parameter.IS_CHECKED).equalsIgnoreCase(ConstantManager.CHECK_BOX_CHECKED_TRUE)) {
viewHolderChild.cbSubCategory.setChecked(true);
notifyDataSetChanged();
} else {
viewHolderChild.cbSubCategory.setChecked(false);
notifyDataSetChanged();
}
viewHolderChild.tvSubCategoryName.setText(child.get(ConstantManager.Parameter.SUB_CATEGORY_NAME));
viewHolderChild.cbSubCategory.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (viewHolderChild.cbSubCategory.isChecked()) {
count = 0;
childItems.get(groupPosition).get(childPosition).put(ConstantManager.Parameter.IS_CHECKED, ConstantManager.CHECK_BOX_CHECKED_TRUE);
notifyDataSetChanged();
} else {
count = 0;
childItems.get(groupPosition).get(childPosition).put(ConstantManager.Parameter.IS_CHECKED, ConstantManager.CHECK_BOX_CHECKED_FALSE);
notifyDataSetChanged();
}
for (int i = 0; i < childItems.get(groupPosition).size(); i++) {
if (childItems.get(groupPosition).get(i).get(ConstantManager.Parameter.IS_CHECKED).equalsIgnoreCase(ConstantManager.CHECK_BOX_CHECKED_TRUE)) {
count++;
}
}
if (count == childItems.get(groupPosition).size()) {
parentItems.get(groupPosition).put(ConstantManager.Parameter.IS_CHECKED, ConstantManager.CHECK_BOX_CHECKED_TRUE);
notifyDataSetChanged();
} else {
parentItems.get(groupPosition).put(ConstantManager.Parameter.IS_CHECKED, ConstantManager.CHECK_BOX_CHECKED_FALSE);
notifyDataSetChanged();
}
ConstantManager.childItems = childItems;
ConstantManager.parentItems = parentItems;
}
});
return convertView;
}
@Override
public boolean isChildSelectable(int i, int i1) {
return false;
}
@Override
public void onGroupCollapsed(int groupPosition) {
super.onGroupCollapsed(groupPosition);
}
@Override
public void onGroupExpanded(int groupPosition) {
super.onGroupExpanded(groupPosition);
}
private class ViewHolderParent {
TextView tvMainCategoryName;
CheckBox cbMainCategory;
ImageView ivCategory;
}
private class ViewHolderChild {
TextView tvSubCategoryName;
CheckBox cbSubCategory;
View viewDivider;
}
}
Step 7. Update Main Activity
Finally, update activity_main.xml like below
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<ExpandableListView
android:id="@+id/lvCategory"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:childDivider="@color/colorBlack"
android:divider="@null"
android:dividerHeight="0dp" />
</LinearLayout>
And replace code of MainActivity.java with following
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ExpandableListView;
import com.expandablelistdemo.Model.DataItem;
import com.expandablelistdemo.Model.SubCategoryItem;
import java.util.ArrayList;
import java.util.HashMap;
public class MainActivity extends AppCompatActivity {
private Button btn;
private ExpandableListView lvCategory;
private ArrayList<DataItem> arCategory;
private ArrayList<SubCategoryItem> arSubCategory;
private ArrayList<ArrayList<SubCategoryItem>> arSubCategoryFinal;
private ArrayList<HashMap<String, String>> parentItems;
private ArrayList<ArrayList<HashMap<String, String>>> childItems;
private MyCategoriesExpandableListAdapter myCategoriesExpandableListAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,CheckedActivity.class);
startActivity(intent);
}
});
setupReferences();
}
private void setupReferences() {
lvCategory = findViewById(R.id.lvCategory);
arCategory = new ArrayList<>();
arSubCategory = new ArrayList<>();
parentItems = new ArrayList<>();
childItems = new ArrayList<>();
DataItem dataItem = new DataItem();
dataItem.setCategoryId("1");
dataItem.setCategoryName("Adventure");
arSubCategory = new ArrayList<>();
for(int i = 1; i < 6; i++) {
SubCategoryItem subCategoryItem = new SubCategoryItem();
subCategoryItem.setCategoryId(String.valueOf(i));
subCategoryItem.setIsChecked(ConstantManager.CHECK_BOX_CHECKED_FALSE);
subCategoryItem.setSubCategoryName("Adventure: "+i);
arSubCategory.add(subCategoryItem);
}
dataItem.setSubCategory(arSubCategory);
arCategory.add(dataItem);
dataItem = new DataItem();
dataItem.setCategoryId("2");
dataItem.setCategoryName("Art");
arSubCategory = new ArrayList<>();
for(int j = 1; j < 6; j++) {
SubCategoryItem subCategoryItem = new SubCategoryItem();
subCategoryItem.setCategoryId(String.valueOf(j));
subCategoryItem.setIsChecked(ConstantManager.CHECK_BOX_CHECKED_FALSE);
subCategoryItem.setSubCategoryName("Art: "+j);
arSubCategory.add(subCategoryItem);
}
dataItem.setSubCategory(arSubCategory);
arCategory.add(dataItem);
dataItem = new DataItem();
dataItem.setCategoryId("3");
dataItem.setCategoryName("Cooking");
arSubCategory = new ArrayList<>();
for(int k = 1; k < 6; k++) {
SubCategoryItem subCategoryItem = new SubCategoryItem();
subCategoryItem.setCategoryId(String.valueOf(k));
subCategoryItem.setIsChecked(ConstantManager.CHECK_BOX_CHECKED_FALSE);
subCategoryItem.setSubCategoryName("Cooking: "+k);
arSubCategory.add(subCategoryItem);
}
dataItem.setSubCategory(arSubCategory);
arCategory.add(dataItem);
Log.d("TAG", "setupReferences: "+arCategory.size());
for(DataItem data : arCategory){
// Log.i("Item id",item.id);
ArrayList<HashMap<String, String>> childArrayList =new ArrayList<HashMap<String, String>>();
HashMap<String, String> mapParent = new HashMap<String, String>();
mapParent.put(ConstantManager.Parameter.CATEGORY_ID,data.getCategoryId());
mapParent.put(ConstantManager.Parameter.CATEGORY_NAME,data.getCategoryName());
int countIsChecked = 0;
for(SubCategoryItem subCategoryItem : data.getSubCategory()) {
HashMap<String, String> mapChild = new HashMap<String, String>();
mapChild.put(ConstantManager.Parameter.SUB_ID,subCategoryItem.getSubId());
mapChild.put(ConstantManager.Parameter.SUB_CATEGORY_NAME,subCategoryItem.getSubCategoryName());
mapChild.put(ConstantManager.Parameter.CATEGORY_ID,subCategoryItem.getCategoryId());
mapChild.put(ConstantManager.Parameter.IS_CHECKED,subCategoryItem.getIsChecked());
if(subCategoryItem.getIsChecked().equalsIgnoreCase(ConstantManager.CHECK_BOX_CHECKED_TRUE)) {
countIsChecked++;
}
childArrayList.add(mapChild);
}
if(countIsChecked == data.getSubCategory().size()) {
data.setIsChecked(ConstantManager.CHECK_BOX_CHECKED_TRUE);
}else {
data.setIsChecked(ConstantManager.CHECK_BOX_CHECKED_FALSE);
}
mapParent.put(ConstantManager.Parameter.IS_CHECKED,data.getIsChecked());
childItems.add(childArrayList);
parentItems.add(mapParent);
}
ConstantManager.parentItems = parentItems;
ConstantManager.childItems = childItems;
myCategoriesExpandableListAdapter = new MyCategoriesExpandableListAdapter(this,parentItems,childItems,false);
lvCategory.setAdapter(myCategoriesExpandableListAdapter);
}
}
We will create data for expandable listview in this activity.
Step 8. Accessing Checked Items
To get the selected parents and child items, we need to create one new activity.
We will get checked items in this activity. So make one new activity named CheckedActivity.
Add the below source code in activity_checked.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="10dp"
android:paddingTop="20dp"
tools:context=".CheckedActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="Selected Parents : "/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textSize="20sp"
android:id="@+id/parent"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="Selected Children : "/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textSize="20sp"
android:id="@+id/child"/>
</LinearLayout>
Write down the below code in CheckedActivity.java
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class CheckedActivity extends AppCompatActivity {
private TextView tvParent, tvChild;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_checked);
tvParent = findViewById(R.id.parent);
tvChild = findViewById(R.id.child);
for (int i = 0; i < MyCategoriesExpandableListAdapter.parentItems.size(); i++ ){
String isChecked = MyCategoriesExpandableListAdapter.parentItems.get(i).get(ConstantManager.Parameter.IS_CHECKED);
if (isChecked.equalsIgnoreCase(ConstantManager.CHECK_BOX_CHECKED_TRUE))
{
tvParent.setText(tvParent.getText() + MyCategoriesExpandableListAdapter.parentItems.get(i).get(ConstantManager.Parameter.CATEGORY_NAME));
}
for (int j = 0; j < MyCategoriesExpandableListAdapter.childItems.get(i).size(); j++ ){
String isChildChecked = MyCategoriesExpandableListAdapter.childItems.get(i).get(j).get(ConstantManager.Parameter.IS_CHECKED);
if (isChildChecked.equalsIgnoreCase(ConstantManager.CHECK_BOX_CHECKED_TRUE))
{
tvChild.setText(tvChild.getText() +" , " + MyCategoriesExpandableListAdapter.parentItems.get(i).get(ConstantManager.Parameter.CATEGORY_NAME) + " "+(j+1));
}
}
}
}
}
I have taken one nested for loop in the above code.
Parent for loop will check which parents are selected and it will print them in the textview.
Inner for loop will get the selected child items and then print it on the another textview.
Now run your project and enjoy playing with checkboxes in expandable listview.
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Thanks and have a nice day!
Download Source Code For Android Expandablelistview Checkbox
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