Credits: http://betterandroid.wordpress.com. The following code is borrowed from LiveFolders sample code from betterandroid site listed previously

satya - Tuesday, April 21, 2009 2:41:36 PM

manifest file


<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.betterandroid.livefolder"
      android:versionCode="3"
      android:versionName="1.2">
      <uses-permission android:name="android.permission.READ_CONTACTS"/>
    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher_contacts_phones">
        <activity android:name=".Contacts"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <!-- LIVE FOLDERS -->
        <activity
            android:name=".ContactsLiveFolders$AllContacts"
            android:label="@string/liveFolderAll"
            android:icon="@drawable/ic_launcher_contacts">

            <intent-filter>
                <action android:name="android.intent.action.CREATE_LIVE_FOLDER" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ContactsLiveFolders$FavoriteContacts"
            android:label="@string/liveFolderFavorites"
            android:icon="@drawable/ic_launcher_contacts_starred">
            <intent-filter>
                <action android:name="android.intent.action.CREATE_LIVE_FOLDER" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>

        </activity>
		<provider android:authorities="com.betterandroid.openhome.livefolder.contacts"
		android:multiprocess="true"
            android:name="ContactsProvider" />
        
    </application>
</manifest>

satya - Tuesday, April 21, 2009 2:42:25 PM

contacts.java


package com.betterandroid.livefolder;

import android.app.Activity;
import android.os.Bundle;

public class Contacts extends Activity
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

satya - Tuesday, April 21, 2009 2:43:35 PM

ContactsLiveFolders


package com.betterandroid.livefolder;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.provider.LiveFolders;
public class ContactsLiveFolders {

    public static class FavoriteContacts extends Activity {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            final Intent intent = getIntent();
            final String action = intent.getAction();
            
            if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equals(action)) {
              
                setResult(RESULT_OK, createLiveFolder(this, ContactsProvider.FAVORITES_URI,
                        getString(R.string.liveFolder_favorites_label),
                        R.drawable.ic_launcher_contacts_starred));
            } else {
                setResult(RESULT_CANCELED);
            }

            finish();
        }
    }
    
    public static class AllContacts extends Activity {

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

          final Intent intent = getIntent();
          final String action = intent.getAction();
          
          if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equals(action)) {
            
              setResult(RESULT_OK, createLiveFolder(this, ContactsProvider.CONTACTS_URI,
                      getString(R.string.liveFolder_all_label),
                      R.drawable.ic_launcher_contacts));
          } else {
              setResult(RESULT_CANCELED);
          }

          finish();
      }
  }

    private static Intent createLiveFolder(Context context, Uri uri, String name,
            int icon) {

        final Intent intent = new Intent();

        intent.setData(uri);
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_NAME, name);
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_ICON,
                Intent.ShortcutIconResource.fromContext(context, icon));
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_DISPLAY_MODE, LiveFolders.DISPLAY_MODE_LIST);

        return intent;
    }
}

satya - Tuesday, April 21, 2009 2:44:39 PM

ContactsProvider


package com.betterandroid.livefolder;

import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.net.Uri;
import android.provider.BaseColumns;
import android.provider.LiveFolders;
import android.provider.Contacts.People;


public class ContactsProvider extends ContentProvider {

    public static final String AUTHORITY = "com.betterandroid.openhome.livefolder.contacts";
   
    /**
     * The content:// style URL for this table
     */
    public static final Uri CONTACTS_URI = Uri.parse("content://" +
            AUTHORITY + "/contacts"   );
    public static final Uri FAVORITES_URI = Uri.parse("content://" +
        AUTHORITY + "/contacts/favorites"   );    

    private static final int TYPE_ALL = 0;
    private static final int TYPE_FAVORITE = 1;
    
    private static final UriMatcher URI_MATCHER;
    static{
      URI_MATCHER = new UriMatcher(UriMatcher.NO_MATCH);
      URI_MATCHER.addURI(AUTHORITY, "contacts", TYPE_ALL);
      URI_MATCHER.addURI(AUTHORITY, "contacts/favorites", TYPE_FAVORITE);
    }
    
    @Override
    public boolean onCreate() {
        return true;
    }

    @Override
    public int bulkInsert(Uri arg0, ContentValues[] values) {
      return 0; //nothing to insert
    }

    
    private static final String[] CURSOR_COLUMNS = new String[]{
      BaseColumns._ID, LiveFolders.NAME, LiveFolders.DESCRIPTION, LiveFolders.INTENT, LiveFolders.ICON_PACKAGE, LiveFolders.ICON_RESOURCE
    };
    private static final String[] CURSOR_ERROR_COLUMNS = new String[]{
      BaseColumns._ID, LiveFolders.NAME, LiveFolders.DESCRIPTION};
    private static final Object[] ERROR_MESSAGE = 
      new Object[]{-1, "No contacts found", "Check your contacts database"};
    private static MatrixCursor ERROR = new MatrixCursor(CURSOR_ERROR_COLUMNS);
    static {
      ERROR.addRow(ERROR_MESSAGE);
    }

    private static final String[] CONTACTS_COLUMN = new String[]{
      People._ID, People.DISPLAY_NAME, People.TIMES_CONTACTED, People.STARRED
    };
    
    public Cursor query(Uri uri, String[] projection, String selection,
            String[] selectionArgs, String sortOrder) {
      
      int type = URI_MATCHER.match(uri);
      
      if(type == UriMatcher.NO_MATCH){
        return ERROR;
      }
      
      MatrixCursor mc = new MatrixCursor(CURSOR_COLUMNS);
      Cursor allContacts = null;
      
      try {
        String filter = type == TYPE_FAVORITE ? People.STARRED +" = 1" : null;
        allContacts = getContext().getContentResolver().query(People.CONTENT_URI, CONTACTS_COLUMN, filter, null, People.DISPLAY_NAME);
        while(allContacts.moveToNext()){
          String contactedDate = "Time contacted: "+allContacts.getInt(2);
          boolean isStarred = allContacts.getInt(3) > 0;
          mc.addRow(new Object[]{allContacts.getLong(0), allContacts.getString(1), contactedDate, 
              Uri.parse("content://contacts/people/"+allContacts.getLong(0)),
              isStarred ? getContext().getPackageName() : null,
              isStarred ? R.drawable.star_on : null
              });
        }
        return mc;
      } catch (Exception e) {
        return ERROR;
      }finally{
        allContacts.close();
      }
    }


    
    @Override
    public String getType(Uri uri) {
      return getContext().getPackageName(); //not very meaningful
    }

    public Uri insert(Uri uri, ContentValues initialValues) {
      throw new UnsupportedOperationException("no insert");
    }

    
    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {
        return 0;
    }

    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
        return 0;
    }

}

satya - Tuesday, April 21, 2009 2:51:23 PM

Here is the layout file just in case


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
	android:autoLink="all"  
	android:textSize="20dip"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="for text see below"
    />
</LinearLayout>