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Expandable Listview with checkboxes

Posted Feb 27, 2016 2016-02-27T00:00:00+08:00 by PipisCrew

reference - http://www.androidhive.info/2013/07/android-expandable-list-view-tutorial/

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//@activity
    <linearlayout android:id="@+id/frag_settings_row02_categories_child" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="20dp">

        <expandablelistview android:id="@+id/frag_settings_row02_categories_explstv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="5dip"></expandablelistview>
    </linearlayout>

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//@the row
<?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent">

    <linearlayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:baselinealigned="false" android:layout_marginleft="35dp" android:orientation="horizontal">

        <textview android:id="@+id/frag_settings_row_detail_02_categories_row_title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textsize="15sp"></textview>
    </linearlayout>

    <checkbox android:id="@+id/frag_settings_row_detail_02_categories_row_check" android:layout_width="wrap_content" android:layout_height="wrap_content" android:focusable="false" android:layout_alignparentright="true" android:gravity="right"></checkbox>

</relativelayout>

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CREATE TABLE [categories]
(id INTEGER,
category_name TEXT,
parent_id INTEGER);

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//fragment.java
public class Frag_Settings extends Fragment implements OnItemClickListener {

	// ////////////expandable
	private Frag_Settings_Categories_Adapter listAdapter;
	private ExpandableListView expListView;
	private List<frag_settings_categories> listHeader_Categories;
	private HashMap<frag_settings_categories,></frag_settings_categories,><frag_settings_categories>> listDataChild;
	// ////////////expandable

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);

		expListView = (ExpandableListView) getActivity().findViewById(R.id.frag_settings_row02_categories_explstv);
		listHeader_Categories = new ArrayList<frag_settings_categories>();
		listDataChild = new HashMap<frag_settings_categories,></frag_settings_categories,><frag_settings_categories>>();

		listAdapter = new Frag_Settings_Categories_Adapter(getActivity(), listHeader_Categories, listDataChild);
		expListView.setAdapter(listAdapter);

		//fetch recordset by DBASE
		CategoriesDatasource categories_datasource = new CategoriesDatasource(getActivity());

		// get HEAD CATEGORY (categories - parent_id=0)
		for (Categories d : categories_datasource.getAllCategoriess()) {
			if (d.getparent_id()==0)
				listHeader_Categories.add(new Frag_Settings_Categories(d.getid(), d.getcategory_name(), false));
		}

		// get HEAD CHILD ITEMS (sub_categories - parent_id = cat_head)
		List<frag_settings_categories> child_Categories = null;
		for (Frag_Settings_Categories cat_head : listHeader_Categories) {

			// each time instantiate the list
			child_Categories = new ArrayList<frag_settings_categories>();

			// get all sub_categories has parent the cat_head
			for (Categories sub_cat : categories_datasource.getAllCategoriess()) {
				if (sub_cat.getparent_id() == cat_head.getId()) {
					child_Categories.add(new Frag_Settings_Categories(sub_cat.getid(), sub_cat.getcategory_name(), false));
				}
			}

			//for each HEAD CATEGORY - hang children
			listDataChild.put(cat_head, child_Categories);
		}
	}

```js //Frag_Settings_Categories_Adapter.java import java.util.HashMap; import java.util.List; 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.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.TextView;

public class Frag_Settings_Categories_Adapter extends BaseExpandableListAdapter {

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private List<frag_settings_categories> data;
private HashMap<frag_settings_categories,></frag_settings_categories,><frag_settings_categories>> child;
private Context context;

public Frag_Settings_Categories_Adapter(Context context, List<frag_settings_categories> items, HashMap<frag_settings_categories,></frag_settings_categories,><frag_settings_categories>> listChildData) {
	this.context = context;
	this.data = items;
	this.child = listChildData;

}

@Override
public Object getChild(int groupPosition, int childPosititon) {
	return this.child.get(this.data.get(groupPosition)).get(childPosititon);
}

@Override
public long getChildId(int groupPosition, int childPosition) {
	return childPosition;
}

// //////////////////// CHILD ITEM
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
	if (convertView == null) {
		LayoutInflater infalInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		convertView = infalInflater.inflate(R.layout.frag_settings_row_detail_02_categories_row, null);
	}

	ViewHolder holder;
	holder = new ViewHolder();
	holder.rowText = (TextView) convertView.findViewById(R.id.frag_settings_row_detail_02_categories_row_title);
	holder.rowChk = (CheckBox) convertView.findViewById(R.id.frag_settings_row_detail_02_categories_row_check);

	// http://stackoverflow.com/questions/12647001/listview-with-custom-adapter-containing-checkboxes
	holder.rowChk.setTag(String.valueOf(groupPosition) +  "|" + String.valueOf(childPosition)); // store the List<>position in TAG

	holder.rowChk.setOnCheckedChangeListener(new OnCheckedChangeListener() {

		public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
			String tag_txt = buttonView.getTag().toString();
			int delimiter_pos =tag_txt.indexOf("|");

			int head_id =Integer.parseInt(tag_txt.substring(0,delimiter_pos));
			int child_id = Integer.parseInt(tag_txt.substring(delimiter_pos+1));

			child.get(data.get(head_id)).get(child_id).setIs_selected(isChecked); // use of List<>position
		}

	});

	// get CHILD items (search via HEAD item)
	List<frag_settings_categories> single = child.get(data.get(groupPosition));

	// >>>>>>>>>> get - which item the view requires via childPosition
	holder.rowText.setText(single.get(childPosition).getTitle());

	if (single.get(childPosition).getIs_selected())
		holder.rowChk.setChecked(true);
	else
		holder.rowChk.setChecked(false);

	return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
	return this.child.get(this.data.get(groupPosition)).size();
}

@Override
public Object getGroup(int groupPosition) {
	return this.data.get(groupPosition);
}

@Override
public int getGroupCount() {
	return this.data.size();
}

@Override
public long getGroupId(int groupPosition) {
	return groupPosition;
}

// //////////////////// HEAD ITEM
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {

	if (convertView == null) {
		LayoutInflater infalInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		convertView = infalInflater.inflate(R.layout.frag_settings_row_detail_02_categories_row, null);
	}

	ViewHolder holder;
	holder = new ViewHolder();
	holder.rowText = (TextView) convertView.findViewById(R.id.frag_settings_row_detail_02_categories_row_title);
	holder.rowChk = (CheckBox) convertView.findViewById(R.id.frag_settings_row_detail_02_categories_row_check);

	// http://stackoverflow.com/questions/12647001/listview-with-custom-adapter-containing-checkboxes
	holder.rowChk.setTag(Integer.valueOf(groupPosition)); // store the List<>position in TAG

	holder.rowChk.setOnCheckedChangeListener(new OnCheckedChangeListener() {

		public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
			data.get((Integer) buttonView.getTag()).setIs_selected(isChecked); // use of List<>position

			notifyDataSetChanged(); //refresh view
		}

	});

	holder.rowText.setText(data.get(groupPosition).getTitle());

	if (data.get(groupPosition).getIs_selected()) {
		holder.rowChk.setChecked(true);
		manipulate_children_value((groupPosition),true);
	} else {
		holder.rowChk.setChecked(false);
		manipulate_children_value(groupPosition,false);
	}

	return convertView;
}

private void manipulate_children_value(int head_position, Boolean val) { //		List<frag_settings_categories> x = child.get(data.get(head_position)); //		 //		for (int i = 0; i < x.size();="" i++)="" {="" child.get(data.get(head_position)).get(i).setis_selected(val);="" }="" similar="" for="" (frag_settings_categories="" x="" :="" child.get(data.get(head_position)))="" {="" x.setis_selected(val);="" }="" }="" @override="" public="" void="" notifydatasetchanged()="" {="" super.notifydatasetchanged();="" }="" @override="" public="" boolean="" hasstableids()="" {="" http://stackoverflow.com/a/18217552/1320686="" return="" true;="" }="" @override="" public="" boolean="" ischildselectable(int="" groupposition,="" int="" childposition)="" {="" return="" true;="" }="" class="" viewholder="" {="" textview="" rowtext;="" checkbox="" rowchk;="" }="" }="" frag_settings_categories.java="" public="" class="" frag_settings_categories="" {="" private="" int="" id;="" private="" string="" title;="" private="" boolean="" is_selected;="" public="" frag_settings_categories(long="" id,string="" title,="" boolean="" is_selected){="" this.id="(int)" id;="" this.title="title;" this.is_selected="is_selected;" }="" public="" int="" getid()="" {="" return="" id;="" }="" public="" void="" setid(int="" id)="" {="" this.id="id;" }="" public="" string="" gettitle()="" {="" return="" title;="" }="" public="" void="" settitle(string="" title)="" {="" this.title="title;" }="" public="" boolean="" getis_selected()="" {="" return="" is_selected;="" }="" public="" void="" setis_selected(boolean="" is_selected)="" {="" this.is_selected="is_selected;" }="" }="" ```="" x.size();="" i++)="" {="" child.get(data.get(head_position)).get(i).setis_selected(val);="" }="" similar="" for="" (frag_settings_categories="" x="" :="" child.get(data.get(head_position)))="" {="" x.setis_selected(val);="" }="" }="" @override="" public="" void="" notifydatasetchanged()="" {="" super.notifydatasetchanged();="" }="" @override="" public="" boolean="" hasstableids()="" {="" http://stackoverflow.com/a/18217552/1320686="" return="" true;="" }="" @override="" public="" boolean="" ischildselectable(int="" groupposition,="" int="" childposition)="" {="" return="" true;="" }="" class="" viewholder="" {="" textview="" rowtext;="" checkbox="" rowchk;="" }="" }="" frag_settings_categories.java="" public="" class="" frag_settings_categories="" {="" private="" int="" id;="" private="" string="" title;="" private="" boolean="" is_selected;="" public="" frag_settings_categories(long="" id,string="" title,="" boolean="" is_selected){="" this.id="(int)" id;="" this.title="title;" this.is_selected="is_selected;" }="" public="" int="" getid()="" {="" return="" id;="" }="" public="" void="" setid(int="" id)="" {="" this.id="id;" }="" public="" string="" gettitle()="" {="" return="" title;="" }="" public="" void="" settitle(string="" title)="" {="" this.title="title;" }="" public="" boolean="" getis_selected()="" {="" return="" is_selected;="" }="" public="" void="" setis_selected(boolean="" is_selected)="" {="" this.is_selected="is_selected;" }="" }=""></frag_settings_categories></frag_settings_categories></frag_settings_categories></frag_settings_categories></frag_settings_categories></frag_settings_categories></frag_settings_categories></frag_settings_categories></frag_settings_categories></frag_settings_categories></frag_settings_categories></frag_settings_categories>

origin - http://www.pipiscrew.com/?p=4037 android-expandable-listview-with-checkboxes

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