Phonegap: Table created in java is not accessible in javascript.

package android.service.DBSample;

import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import android.widget.Toast;

public class database extends SQLiteOpenHelper  {
	
	public static final String TABLE_COMMENTS = "callLog";
	  public static final String COLUMN_ID = "Id";
	  public static final String number = "Number";

	  private static final String DATABASE_NAME = "calllogs";
	  private static final int DATABASE_VERSION = 1;

	  private static final String DATABASE_CREATE = "create table "+ TABLE_COMMENTS + "(" + COLUMN_ID+ " integer primary key autoincrement, " + number + " text not null);";
	  
	public database(Context context) {
		super(context, DATABASE_NAME, null, DATABASE_VERSION);
		// TODO Auto-generated constructor stub
	}
	
	@Override
	  public void onCreate(SQLiteDatabase database) {
	    database.execSQL(DATABASE_CREATE);
	    int callCount=0;
		  Log.d("CallLog_Plugin", "Table Creation:"+ callCount);
	  }

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		 int callCount=0;
		  Log.d("CallLog_Plugin", "Table Updation:"+ callCount);
		    //db.execSQL("DROP TABLE IF EXISTS " + TABLE_COMMENTS);
		   // onCreate(db);
	}
	
	public void addData(calllogs callogs)
	{
		SQLiteDatabase db=this.getWritableDatabase();
		ContentValues values=new ContentValues();
		values.put(number, callogs.getNumber());
		db.insert(TABLE_COMMENTS,null,values);
		db.close();
		int callCount=0;
		  Log.d("CallLog_Plugin", "Insertion:"+ callCount);
	}
}

package android.service.DBSample;

public class calllogs {

	String Number;
	
	public calllogs(){
        
    }
    // constructor
    public calllogs(String num){
        this.Number = num;
    }
	
	public String getNumber(){
        return this.Number;
    }
}

database=new database(this);
database.addData(new calllogs("344597587"));

var db=window.openDatabase("calllogs","1.0","calllogs",200000);
        		db.transaction(function(tx){
        		tx.executeSql('SELECT * FROM callLog', [], function (tx, results) 
         		{
            		var len = results.rows.length;
            		alert(len);
        		});
        		});