Usar nuestra propia sqlite en Android

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
 
public class DataBaseHelperSqlFromFile extends SQLiteOpenHelper{
 
    //La dirección de nuestra aplicación, hay que cambiar la palabra PACKAGE por el nombre del paquete de nuestra app
	//The direction of our application, change the word PACKAGE by the name of our app package
    private final static String DB_PATH = "/data/data/PACKAGE/databases/";
 
    //El nombre del archivo de nuestra base de datos que debemos tener en nuestra carpeta assets
    //The name of our data base file. It must be in our folder assets.
    private final static String DB_NAME = "database.sqlite";
 
    private SQLiteDatabase myDataBase; 
 
    private final Context myContext;
 
    /**
     * Constructor
     */
    public DataBaseHelperSqlFromFile(Context context) {
    	super(context, DB_NAME, null, 1);
        this.myContext = context;
    }	
 
    /**
     * Crea una base de datos vacía y escribe en ella nuesta propia base de datos
     * Creates a empty database on the system and rewrites it with your own database.
     * */
    public void createDataBase(Context contexto) throws IOException{
 
    	//Comprueba si ya existe la base de datos
    	boolean dbExist = checkDataBase();
 
 
 
    	if(dbExist){
    		//Si existe la base de datos no hace nada
    		//If our database exists, do nothing
    	}else{
    		//Si no existe se llama a este método que crea una nueva base de datos en la ruta por defecto
    		//If doesnt exists this method creates an empty database into the default system path
        	this.getReadableDatabase();
 
        	try {
        		//Copia nuestra database.sqlite en la nueva base de datos creada
        		//Copy our database.sqlite into the new database
    			copyDataBase();
 
    		} catch (IOException e) {
 
        		throw new Error("Error copying database");
 
        	}
    	}
 
    }
 
    /**
     * Comprueba si ya existe nuestra base de datos
     * Check if the database already exist to avoid re-copying the file each time you open the application.
     * @return true if it exists, false if it doesn't
     */
    private boolean checkDataBase(){
 
    	SQLiteDatabase checkDB = null;
 
    	try{
    		String myPath = DB_PATH + DB_NAME;
    		checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
 
    	}catch(SQLiteException e){
 
    		//database does't exist yet.
 
    	}
 
    	if(checkDB != null){
 
    		checkDB.close();
 
    	}
 
    	return checkDB != null ? true : false;
    }
 
 
    /**
     * Copia nuestra base de datos sqlite de la carpeta assets a nuestra nueva base de datos
     * Copies your database from your local assets-folder to the just created empty database
     * */
    private void copyDataBase() throws IOException{
 
    	//Abre nuestra base de datos del fichero
    	//Open your local db as the input stream
    	InputStream myInput = myContext.getAssets().open(DB_NAME);
 
    	//La dirección de nuestra nueva base de datos
    	// Path to the just created empty db
    	String outFileName = DB_PATH + DB_NAME;
 
    	//Abre la nueva base de datos
    	//Open the empty db as the output stream
    	OutputStream myOutput = new FileOutputStream(outFileName);
 
    	//Transfiere bytes desde nuestro archivo a la nueva base de datos
    	//transfer bytes from the inputfile to the outputfile
    	byte[] buffer = new byte[1024];
    	int length;
    	while ((length = myInput.read(buffer))>0){
    		myOutput.write(buffer, 0, length);
    	}
 
    	//Close the streams
    	myOutput.flush();
    	myOutput.close();
    	myInput.close();
 
    }
 
    /**
     * Abre la base de datos
     * Open the database
     * @throws SQLException
     */
    public void openDataBase() throws SQLException{
 
        String myPath = DB_PATH + DB_NAME;
    	myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
 
    }
 
    @Override
	public synchronized void close() {
 
    	    if(myDataBase != null)
    		    myDataBase.close();
 
    	    super.close();
 
	}
 
	@Override
	public void onCreate(SQLiteDatabase db) {
 
	}
 
	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 
	}
}

DataBaseHelperSqlFromFile myDbHeper;
 
@Override
public void onCreate(Bundle savedInstanceState) {
	try{
    	super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        myDbHelper = new DataBaseHelperSqlFromFile(this);
        myDbHelper.createDataBase(this);
	} catch (IOException ioe) {
 		throw new Error("Unable to create database");
 	}
}