如何在评分栏中计算和显示平均评分？

Question

我是一名初学者，正在开发一个显示项目的应用程序。用户可以使用评分栏为项目评分，也可以发表评论。等级栏也有刻度。

如何计算该商品的平均评分并将其显示在新的评分栏中？有什么想法吗？

RatingBar mRatingBar = (RatingBar) findViewById(R.id.ratingBar);
    EditText mFeedback = (EditText) findViewById(R.id.etFeedback);
    Button mSendFeedback = (Button) findViewById(R.id.btnSubmit);
    TextView mRatingScale = (TextView) findViewById(R.id.tvRatingScale);
mRatingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
            @Override
            public void onRatingChanged(RatingBar ratingBar, float v, boolean b) {
                mRatingScale.setText(String.valueOf(v));
                switch ((int) ratingBar.getRating()) {
                    case 1:
                        mRatingScale.setText("Pretty bad");
                        break;
                    case 2:
                        mRatingScale.setText("Just okay");
                        break;
                    case 3:
                        mRatingScale.setText("Good");
                        break;
                    case 4:
                        mRatingScale.setText("Very good");
                        break;
                    case 5:
                        mRatingScale.setText("Amazing!");
                        break;
                    default:
                        mRatingScale.setText("");
                }
            }
        });
        mSendFeedback.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (mRatingBar.getRating() == 0.0 ) {
                    Toast.makeText(EventDemo.this, "Please enter a rating", Toast.LENGTH_LONG).show();
                } else {
                    mFeedback.setText("");
                    mRatingBar.setRating(0);
                    Toast.makeText(EventDemo.this, "Thanks for the rating", Toast.LENGTH_SHORT).show();
                }
            }

Answer 1

您可以使用RatingBar.getRating（）获取每个等级值，将所有值相加并除以等级栏数。

    RatingBar ratingBar = (RatingBar) findViewById(R.id.ratingBar1);
RatingBar ratingBar1 = (RatingBar) findViewById(R.id.ratingBar2);

float total = 0;
total += ratingBar.getRating();
total += ratingBar1.getRating();
float average = total / 2;

这是您想要的吗？请发表评论以避免误会。谢谢。