<RatingBar style="@android:style/Widget.DeviceDefault.RatingBar.Small" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="10dp" android:isIndicator="false" android:numStars="5" android:rating="2.5" android:stepSize="0.5"/>

ratingBar = (RatingBar) findViewById(R.id.ratingBar);ratingBar.setRating(3.5f);ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() { @Override public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {  if (fromUser) {//fromUser rating數量是否發生改變   ratingBar.setRating(rating);  }  Log.d(TAG, "rating=" + ratingBar.getRating());  Log.d(TAG, "fromUser=" + fromUser); }});