GreenDao 连接与关闭Sqlite数据库

public class DBOperator {
	
	private static DBOperator dbInstance = new DBOperator();
	
	private SQLiteDatabase db;
	
	private DaoMaster daoMaster;
	
	private DaoSession daoSession;

	public static DBOperator getInstance() {
		return dbInstance;
	}

	/**
	 * sqlite connection
	 * 
	 * @param
	 * @return
	 */
	public DaoSession getDaoSession() {
		try {
			db = SQLiteDatabase.openDatabase(数据库路径 + 数据库名称, null,
					SQLiteDatabase.OPEN_READWRITE);
			daoMaster = new DaoMaster(db);
			daoSession = daoMaster.newSession();
		} catch (Exception e) {
			daoSession = null;
		}
		return daoSession;
	}

	/**
	 * sqlite 连接
	 * 
	 * @param db
	 * @return
	 */
	public SQLiteDatabase connection(SQLiteDatabase db) {
		try {
			db = SQLiteDatabase.openDatabase(数据库路径 + 数据库名称, null,
					SQLiteDatabase.OPEN_READWRITE);
		} catch (Exception e) {
			lodg("[SQLiteDatabase]......e===>" + e.toString());
		}
		return db;
	}

	/**
	 * 关闭 sqlite db
	 * 
	 * @param mCursor
	 * @param db
	 */
	public void closeConnection(Cursor mCursor, SQLiteDatabase db) {
		try {
			if (mCursor != null) {
				mCursor.close();
			}
			if (db != null) {
				db.close();
			}
		} catch (Exception e) {
			lodg("[closeConnection]....e====>" + e.toString());
		}
	}


}