防止在RatingBar上获得某些评级

Question

评级栏有一个OnRatingBarChangeListener ，仅在用户已更改评级时才有效。 我想当用户点击评级栏以获得3星评级时， RatingBar会提示不允许3星评级的Toast 。

Answer 1

这段代码可以帮到你。

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_rating);
        RatingBar ratingBar;
        ratingBar = (RatingBar)findViewById(R.id.ratingBar);
        ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {

            @Override
            public void onRatingChanged(RatingBar ratingBar, float rating,boolean fromUser) {
                // TODO Auto-generated method stub
                if(rating == 3){
                    Toast.makeText(getApplicationContext(), "3 star rating is not allowed.", Toast.LENGTH_LONG).show();
                    ratingBar.setRating(0);
                }
            }
        });
    }

Answer 2

U可以通过onRatingChanged方法中的onRatingBarChangedListener获取用户设置的评级。

ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {

    public void onRatingChanged(RatingBar ratingBar, float rating,
        boolean fromUser) {

        if(rating == 3){
             //show toast here. then may be reset rating to 0.
        }

     }
});