Download this Sectionizer from the following url :
https://github.com/ragunathjawahar/simple-section-adapter
Add the following files "Sectionizer.java" and "SimpleSectionAdapter" to your application project as shown in the following figure :
package com.rajeshvijayakumar.sectionedlist;
import com.rajeshvijayakumar.adapters.Sectionizer;
import com.rajeshvijayakumar.adapters.SimpleSectionAdapter;
public class SectionedListDemoActivity extends Activity implements OnItemClickListener {
//Init Listview
private ListView listView;
//Declare List Data
private List<String> stringList;
// Declare CustomAdapter
private StringAdapter stringAdapter;
//Declare SimpleSectionAdapter
private SimpleSectionAdapter<String> sectionAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sd_layout_list);
// Initialize ListView
listView=(ListView)findViewById(R.id.list_view);
// Initialize array list and add data to the list
stringList=new ArrayList<String>();
stringList.add("Rajesh");
stringList.add("Ramanan");
stringList.add("Kannan");
stringList.add("Mahesh");
stringList.add("Moses");
stringList.add("Kuberan");
// Initialize Custom Adapter that you defined
stringAdapter=new StringAdapter(this,R.id.item_textView, Sorting(stringList));
//Initialize SimpleSectionAdapter and add your custom adapter and sectionizer class that you defined
sectionAdapter=new SimpleSectionAdapter<String>(this, stringAdapter,
R.layout.sd_layout_sectioned, R.id.title, new ListSectionizer());
// set that sectionAdapter to listview
listView.setAdapter(sectionAdapter);
listView.setOnItemClickListener(this);
}
/// Defining your own Custom Adapter
private class StringAdapter extends ArrayAdapter<String> {
// Attributes
private List<String> strModel;
public StringAdapter(Context context, int textViewResourceId,
List<String> strModel) {
super(context, textViewResourceId, strModel);
this.strModel = strModel;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
Holder holder = null;
if (view == null) {
view = View.inflate(SectionedListDemoActivity.this,
R.layout.sd_layout_list_item, null);
holder = new Holder();
holder.StringNameTextView = (TextView) view
.findViewById(R.id.item_textView);
view.setTag(holder);
} else {
holder = (Holder) view.getTag();
}
String nameText=strModel.get(position);
holder.StringNameTextView.setText(nameText);
return view;
}
}
static class Holder
{
private TextView StringNameTextView;
}
// Defining your own Sectionizer class which can added to your sectionAdapter
class ListSectionizer implements Sectionizer<String> {
@Override
public String getSectionTitleForItem(String itemName) {
return itemName.toUpperCase().substring(0, 1);
}
}
//Sort your list using comparator for sectioned list
public static Comparator<String> StringComparator = new Comparator<String>() {
public int compare(String app1, String app2) {
String stringName1 = app1;
String stringName2 = app2;
return stringName1.compareToIgnoreCase(stringName2);
}
};
private List<String> Sorting(List<String> Names) {
Collections.sort(Names, StringComparator);
return Names;
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
// TODO Auto-generated method stub
int index = sectionAdapter.getIndexForPosition(position);
sectionAdapter.notifyDataSetChanged();
}
}
sd_layout_list.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" >
<ListView
android:id="@+id/list_view"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>
sd_layout_list_item.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" >
<TextView
android:id="@+id/item_textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
sd_layout_sectioned.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="fill_parent"
android:background="@android:color/holo_blue_dark" >
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="@android:color/white"
android:textSize="15dp"
android:textStyle="bold" />
</RelativeLayout>
Output :
Source Code : Download this Example Here
