Google Firebase重设部分“用户”

Question

Picture

我在上面的图片中向您展示。 Firebase的“用户”选项卡下有一个“点”选项卡。我希望在周末重置“点”。用Java（android studio）编写的应用程序。我共享个人资料文件中的代码

 FloatingActionButton backBtn = view.findViewById(R.id.backBtn);
    pointTv = view.findViewById(R.id.pointTv);
    goldNumTv = view.findViewById(R.id.goldNumTv);
    userNameTv = view.findViewById(R.id.userNameTv);
    getMoreGoldBtn = view.findViewById(R.id.get_more_gold);
    bnp = view.findViewById(R.id.quizSuccessPercentage);

    getMoreGoldBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            showBuyDialog();
        }
    });

    backBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            pop();
        }
    });

    private void getProfile() {

    int questionSize = 0;
    int trueCount = 0;

    Glide.with(_mActivity)
            .load(currentUser.getPhotoUrl())
            .into(mChooseImage);

    pointTv.setText(currentUser.getPoint()+"");
    goldNumTv.setText(currentUser.getGoldNum()+"");
    userNameTv.setText(currentUser.getName());

    if (!currentUser.getGames().isEmpty()){
        Iterator it = currentUser.getGames().entrySet().iterator();
        while (it.hasNext()) {
            Map.Entry pair = (Map.Entry)it.next();
            //System.out.println(pair.getKey() + " = " + );

            Game game = (Game) pair.getValue();

            questionSize = questionSize + game.getQuestionSize();
            trueCount = trueCount + game.getTrueCount();

            it.remove(); // avoids a ConcurrentModificationException
        }

        int percentage = (trueCount * 100) / questionSize;
        bnp.setProgress(percentage);
    }

}