Expandable Listview
reference
http://theopentutorials.com/tutorials/android/listview/android-expandable-list-view-example/
//activity_auto_moto_details.xml
<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"
tools:context=".MainActivity" >
<ExpandableListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="fill_parent" >
</ExpandableListView>
</RelativeLayout>
//activity_auto_moto_details_row_head.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp" >
<TextView
android:id="@+id/row_head"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="25dp"/>
</LinearLayout>
//activity_auto_moto_details_row_head_child.xml
<?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"
android:padding="10dp" >
<TextView
android:id="@+id/row_item_head"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:paddingLeft="25dp" />
<ImageView
android:id="@+id/row_item_delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:src="@drawable/delete"
android:contentDescription="@string/app_name"/>
</RelativeLayout>
activity.java
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import android.app.ExpandableListActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.Toast;
public class AutoMotoDetails extends ExpandableListActivity implements OnChildClickListener {
List<String> groupList;
List<String> childList;
Map<String, List<String>> head;
ExpandableListView expListView;
AutoMotoDetailsAdapter expListAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_auto_moto_details);
createGroupList();
createCollection();
expListView = getExpandableListView();
expListAdapter = new AutoMotoDetailsAdapter(this, groupList, head);
expListView.setAdapter(expListAdapter);
getActionBar().setDisplayHomeAsUpEnabled(true);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.auto_moto_details, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
final String selected = (String) expListAdapter.getChild(groupPosition, childPosition);
Toast.makeText(getBaseContext(), selected, Toast.LENGTH_LONG).show();
return true;
}
private void createGroupList() {
groupList = new ArrayList<String>();
groupList.add("HP");
groupList.add("Dell");
groupList.add("Lenovo");
groupList.add("Sony");
groupList.add("HCL");
groupList.add("Samsung");
}
private void createCollection() {
String[] hpModels = { "HP Pavilion G6-2014TX", "ProBook HP 4540", "HP Envy 4-1025TX" };
String[] hclModels = { "HCL S2101", "HCL L2102", "HCL V2002" };
String[] lenovoModels = { "IdeaPad Z Series", "Essential G Series", "ThinkPad X Series", "Ideapad Z Series" };
String[] sonyModels = { "VAIO E Series", "VAIO Z Series", "VAIO S Series", "VAIO YB Series" };
String[] dellModels = { "Inspiron", "Vostro", "XPS" };
String[] samsungModels = { "NP Series", "Series 5", "SF Series" };
head = new LinkedHashMap<String, List<String>>();
for (String laptop : groupList) {
if (laptop.equals("HP")) {
loadChild(hpModels);
} else if (laptop.equals("Dell"))
loadChild(dellModels);
else if (laptop.equals("Sony"))
loadChild(sonyModels);
else if (laptop.equals("HCL"))
loadChild(hclModels);
else if (laptop.equals("Samsung"))
loadChild(samsungModels);
else
loadChild(lenovoModels);
head.put(laptop, childList);
}
}
private void loadChild(String[] laptopModels) {
childList = new ArrayList<String>();
for (String model : laptopModels)
childList.add(model);
}
}
AutoMotoDetailsAdapter.java
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class AutoMotoDetailsAdapter extends BaseExpandableListAdapter {
private Activity context;
private Map<String, List<String>> head;
private List<String> rows;
private LayoutInflater mLayoutInflater;
public AutoMotoDetailsAdapter(Activity context, List<String> rows, Map<String, List<String>> head) {
this.context = context;
this.rows = rows;
this.head = head;
mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public Object getChild(int groupPosition, int childPosition) {
return head.get(rows.get(groupPosition)).get(childPosition);
}
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
convertView = mLayoutInflater.inflate(R.layout.activity_auto_moto_details_row_head_child, null);
String item = (String) getChild(groupPosition, childPosition);
TextView txt_row_item = (TextView) convertView.findViewById(R.id.row_item_head);
ImageView delete = (ImageView) convertView.findViewById(R.id.row_item_delete);
delete.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setMessage("Do you want to remove ?");
builder.setCancelable(false);
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
List<String> child = head.get(rows.get(groupPosition));
child.remove(childPosition);
notifyDataSetChanged();
}
});
builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
});
txt_row_item.setText(item);
return convertView;
}
public int getChildrenCount(int groupPosition) {
return head.get(rows.get(groupPosition)).size();
}
public Object getGroup(int groupPosition) {
return rows.get(groupPosition);
}
public int getGroupCount() {
return rows.size();
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
String head_text = (String) getGroup(groupPosition);
convertView = mLayoutInflater.inflate(R.layout.activity_auto_moto_details_row_head, null);
TextView item = (TextView) convertView.findViewById(R.id.row_head);
item.setTypeface(null, Typeface.BOLD);
item.setText(head_text);
return convertView;
}
@Override
public boolean hasStableIds() {
// It's used when you change the data of the Adapter, everytime you change the data the ExpandableListView should update it's views to reflect the changes.
// if true the ExpandableListView can reuse the same View if the ID is the same.
return true;
}
@Override
public boolean isChildSelectable(int arg0, int arg1) {
// whether the child at the specified position is selectable
return true;
}
}
