public class CityDBHelper extends SQLiteOpenHelper {

  private static int DB_VERSION = 1;
	private static String DB_PATH = Environment.getDataDirectory()
			.getPath()+"/data/com.geek4it.demo/databases/";
	private static String DB_NAME = "cities";
	private SQLiteDatabase myDataBase;
	private final Context myContext;

	public CityDBHelper(Context context) {

		super(context, DB_NAME, null, DB_VERSION);
		this.myContext = context;
	}

	public void createDataBase() throws IOException {

		boolean dbExist = checkDataBase();
		Log.i("Geek4IT", "createDataBase...dbExist:" + dbExist);
		if (!dbExist) {
			this.getReadableDatabase();
			try {
				copyDataBase();
			} catch (IOException e) {
				throw new Error("Error copying database");
			}
		}
	}

	private boolean checkDataBase() {

		SQLiteDatabase checkDB = null;
		try {
			String myPath = DB_PATH + DB_NAME;
			checkDB = SQLiteDatabase.openDatabase(myPath, null,
					SQLiteDatabase.OPEN_READONLY);

		} catch (SQLiteException e) {
		}

		if (checkDB != null) {
			checkDB.close();
		}

		return checkDB != null ? true : false;
	}

	private void copyDataBase() throws IOException {
		InputStream myInput = myContext.getAssets().open(DB_NAME);
		String outFileName = DB_PATH + DB_NAME;
		OutputStream myOutput = new FileOutputStream(outFileName);
		byte[] buffer = new byte[1024];
		int length;
		while ((length = myInput.read(buffer)) > 0) {
			myOutput.write(buffer, 0, length);
		}
		myOutput.flush();
		myOutput.close();
		myInput.close();
	}

	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) {

	}

}