如何将评级栏设置为最低一颗星？

Question

I have a requirement to rate for a user with minimum of one star and after that ratings should increase to 0.5. But my question is that the user should not change the minimum rating of star to 0.5 or 0. 1 should be the default rating. Please help with this and awaiting for your earlier response. I also tried implementing by listeners from the link but completely struct with the logic inside My code is:

ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {

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

    }
});

Answer 1

 ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {

@Override public void onRatingChanged(RatingBar ratingBar, float rating, 
  boolean fromUser) {
     if(rating<1.0f)
          ratingBar.setRating(1.0f);
}
});

Answer 2

如果ur的值为String，则设置Rating为float值：

ratingBar.setRating(Float.parseFloat(result));

Answer 3

      ratingbar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {

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

                  ratingBar.setRating(Float.parseFloat(""+Math.ceil(rating)));
                }
 }

Answer 4

ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
    public void onRatingChanged(RatingBar ratingBar, float rating,
                                boolean fromUser) {
            Toast.makeText(RateUsProductActivity.this,"Rating :-  "+String.valueOf(rating),Toast.LENGTH_SHORT).show();
        if(rating<1.0f)
            ratingBar.setRating(1.0f);
    }
});

When Rating is less than 1 then automatically set Rating 1

Happy Coding Cheers!

Answer 5

Setting OnRatingBarChangeListener will work, but the problem with this solution is that if you try to drag rating below 1 star, it will show zero stars for a second, and only then will jump back to desirable 1 star. To avoid this "flickering" behavior I sugest to inherit RatingBar and override method getMin . For example:

class MinStarRatingBar @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0
) : AppCompatRatingBar(context, attrs, defStyleAttr) {

    private var minStars = 0

    fun setMinimumStars(minStars: Int) {
        this.minStars = minStars
    }

    override fun getMin(): Int {
        return minStars
    }
}

And then just use ratingBar.setMinimumStars(/*your value*/)

NOTE : I don't know why, but setMin method just isn't working. It requires minimum Api 26 to run, and changes the change step in Ratinbar and does not affect min value of stars for some reason.