SAMSET DEVELOPER: ExpandableListView Sample 1

Hello friends today we are create expandablelistview

activity_main.xml

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

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
</RelativeLayout>

expandable_list_parent.xml

<?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="wrap_content">

<TextView

android:id="@+id/parent_list_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:padding="16dp"
android:text="Title"
android:textStyle="bold" />

<CheckBox
android:id="@+id/checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="8dp"
android:focusable="false"
android:freezesText="false" />

</RelativeLayout>

expandable_list_child.xml

ActvityMain.java

import android.os.Bundle;
import android.app.ExpandableListActivity;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.util.Log;
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.ExpandableListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.CompoundButton.OnCheckedChangeListener;

import com.samset.expadablelistview.model.Child;
import com.samset.expadablelistview.model.ParentItem;

import java.util.ArrayList;

public class MainActivity extends ExpandableListActivity {
private static final String STR_CHECKED = " is Checked!";
private static final String STR_UNCHECKED = " is unChecked!";
private int ParentClickStatus = -1;
private int ChildClickStatus = -1;
private ArrayList<ParentItem> parentItems;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

Resources res = this.getResources();
Drawable devider = res.getDrawable(R.drawable.line);

// Set ExpandableListView values

getExpandableListView().setGroupIndicator(null);
getExpandableListView().setDivider(devider);
getExpandableListView().setChildDivider(devider);
getExpandableListView().setDividerHeight(1);
registerForContextMenu(getExpandableListView());

//Creating static data in arraylist
final ArrayList<ParentItem> dummyList = getParentsData();

// Adding ArrayList data to ExpandableListView values
checkData(dummyList);

getExpandableListView().setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {

Log.e("Main", " you click" + childPosition);
return false;
}
});
}

private ArrayList<ParentItem> getParentsData() {
ParentItem p, p1, p2, p3;
ArrayList<ParentItem> groupNames = new ArrayList();
p = new ParentItem();
p.setText1("A");
p.setChildren(new ArrayList<Child>());

// Create Child class object
final Child child = new Child();
child.setText1("Child 0");

final Child child1 = new Child();
child1.setText1("Child 1");

final Child child2 = new Child();
child2.setText1("Child 2");

final Child child3 = new Child();
child3.setText1("Child 3");

//Add Child class object to parent class object
p.getChildren().add(child);
p.getChildren().add(child1);
p.getChildren().add(child3);

// B group

p1 = new ParentItem();
p1.setText1("B");
p1.setChildren(new ArrayList<Child>());

// Create Child class object
final Child childb1 = new Child();
childb1.setText1("Child 0");
//Add Child class object to parent class object
p1.getChildren().add(childb1);

// C group
p2 = new ParentItem();
p2.setText1("C");
p2.setChildren(new ArrayList<Child>());

// Create Child class object
final Child childc1 = new Child();
childc1.setText1("Child 0");

final Child childc2 = new Child();
childc2.setText1("Child 1");

final Child childc3 = new Child();
childc3.setText1("Child 2");

final Child childc4 = new Child();
childc4.setText1("Child 3");

final Child childc5 = new Child();
childc5.setText1("Child 4");

p2.getChildren().add(childc1);
p2.getChildren().add(childc2);
p2.getChildren().add(childc3);
p2.getChildren().add(childc4);
p2.getChildren().add(childc5);

// D group

p3 = new ParentItem();
p3.setText1("D");
p3.setChildren(new ArrayList<Child>());
final Child childd1 = new Child();
childd1.setText1("Child 0");

final Child childd2 = new Child();
childd2.setText1("Child 1");

p3.getChildren().add(childd1);
p3.getChildren().add(childd2);

//Add Child class object to parent class object

groupNames.add(p);
groupNames.add(p1);
groupNames.add(p2);
groupNames.add(p3);

// You want to create json structure use this code

  Gson gson = new Gson();
Type type = new TypeToken<ArrayList<ParentItem>>() {}.getType();
String json = gson.toJson(groupNames, type);
System.out.println(json);

return groupNames;

}

private void checkData(final ArrayList<ParentItem> datalist) {
if (datalist == null)
return;

parentItems = datalist;

// Check for ExpandableListAdapter object
if (this.getExpandableListAdapter() == null) {
//Create ExpandableListAdapter Object
final MyExpandableListAdapter mAdapter = new MyExpandableListAdapter();

// Set Adapter to ExpandableList Adapter
this.setListAdapter(mAdapter);
} else {
// Refresh ExpandableListView data
((MyExpandableListAdapter) getExpandableListAdapter()).notifyDataSetChanged();
}
}

/**
   * A Custom adapter create
   */
private class MyExpandableListAdapter extends BaseExpandableListAdapter {

private LayoutInflater inflater;

public MyExpandableListAdapter() {
// Create Layout Inflator
inflater = LayoutInflater.from(MainActivity.this);
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
   View convertView, ViewGroup parentView) {
final ParentItem parent = parentItems.get(groupPosition);
convertView = inflater.inflate(R.layout.expandable_list_parent, parentView, false);

((TextView) convertView.findViewById(R.id.parent_list_title)).setText(parent.getText1());

CheckBox checkbox = (CheckBox) convertView.findViewById(R.id.checkbox);
checkbox.setChecked(parent.isChecked());

checkbox.setOnCheckedChangeListener(new CheckUpdateListener(parent));

return convertView;
}

// This Function used to inflate child rows view
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
   View convertView, ViewGroup parentView) {
final ParentItem parent = parentItems.get(groupPosition);
final Child child = parent.getChildren().get(childPosition);

convertView = inflater.inflate(R.layout.expandable_list_child, parentView, false);
((TextView) convertView.findViewById(R.id.child_list_item_title)).setText(child.getText1());

return convertView;
}

@Override
public Object getChild(int groupPosition, int childPosition) {
return parentItems.get(groupPosition).getChildren().get(childPosition);
}

//Call when child row clicked
@Override
public long getChildId(int groupPosition, int childPosition) {
if (ChildClickStatus != childPosition) {
ChildClickStatus = childPosition;

}

return childPosition;
}

@Override
public int getChildrenCount(int groupPosition) {
int size = 0;
if (parentItems.get(groupPosition).getChildren() != null)
size = parentItems.get(groupPosition).getChildren().size();
return size;
}

@Override
public Object getGroup(int groupPosition) {
Log.i("GroupItem", groupPosition + "= getGroup ");

return parentItems.get(groupPosition);
}

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

//Call when parent row clicked
@Override
public long getGroupId(int groupPosition) {
Log.i("GroupItem", groupPosition + "= getGroupId " + ParentClickStatus);

if (groupPosition == 2 && ParentClickStatus != groupPosition) {

//Alert to user
Toast.makeText(getApplicationContext(), "GroupItem :" + groupPosition,
Toast.LENGTH_LONG).show();
}

ParentClickStatus = groupPosition;
if (ParentClickStatus == 0)
ParentClickStatus = -1;

return groupPosition;
}

@Override
public void notifyDataSetChanged() {
// Refresh List rows
super.notifyDataSetChanged();
}

@Override
public boolean isEmpty() {
return ((parentItems == null) || parentItems.isEmpty());
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}

@Override
public boolean hasStableIds() {
return true;
}

@Override
public boolean areAllItemsEnabled() {
return true;
}

/**
   * ----------- Checkbox Checked Change Listener -----------------
   **/

private final class CheckUpdateListener implements OnCheckedChangeListener {
private final ParentItem parent;

private CheckUpdateListener(ParentItem parent) {
this.parent = parent;
}

public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
Log.i("onCheckedChanged", "isChecked: " + isChecked);
parent.setChecked(isChecked);

((MyExpandableListAdapter) getExpandableListAdapter()).notifyDataSetChanged();

final Boolean checked = parent.isChecked();
Toast.makeText(getApplicationContext(), "GroupItem : " + parent.getName() + " " + (checked ? STR_CHECKED : STR_UNCHECKED),
Toast.LENGTH_LONG).show();
}
}

}

}

Thank you

Full Source code.ExpandableListView-1

Live Sample

SAMSET DEVELOPER

Headertab

Saturday, 14 May 2016

ExpandableListView Sample 1

Full Source code.ExpandableListView-1

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