下面是最初设置得分的代码(这个工作),获得得分的方法(也正常)和更新得分的方法,将相关的球员得分增加1.这是不起作用的部分,我有什么不同的地方吗？谢谢.

/** Add a record to the database of two player scores
     * @param playerId
     * @param playerscore
     **/
    public void addscore (int playerId,int playerscore) {

        sqliteDatabase database = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(ID,playerId);
        values.put(PLAYERNUM,playerId);
        values.put(score,playerscore);

        database.insert(TABLE_2PscoreS,null,values);

        database.close();

    }


    // Get the score 
    public int getscore (int playerId) { 
        sqliteDatabase database = this.getReadableDatabase();

        Cursor cursor = database.query(TABLE_2PscoreS,COLUMNS," player = ?",new String[] {String.valueOf(playerId) },null); //null = groupby,having,orderby,limit

        if (cursor !=null) { cursor.moveToFirst(); }

        int output = cursor.getInt(2);

        return output;
    }


    // Increment score by 1
    public void updatescore (int playerId) {

        sqliteDatabase database = this.getWritableDatabase();

        int playerscore = getscore(playerId);
        int playerscoreInc = playerscore ++;

        ContentValues values = new ContentValues();
        values.put("score",playerscoreInc);

        database.update(TABLE_2PscoreS,values,PLAYERNUM+" = ?",new String[] {String.valueOf(playerId)} );

        database.close();

    }