Android Rating Bar shows only full stars, not half stars too

I'm using rating bars in my Android application. But it only shows full stars, when I also want half stars.

I inserted a SQLite row with a name and the ratingValue, in there the ratingValue stands as "3.5" but my application turns it into "4". Even if my StepSize is "0.5", even the default value is changed to "3"

EDIT: If you click on the listrow, it dialogs another ratingbar which you can "rate" and if you click on a button, it sends the rating value into the database. The listitem RatingBar is only for showing the "average" rating but that's where it goes wrong, it rounds the value up

EDIT 2: set the stepsize to 0.1 and now, strangely, only the middle star accepts the float number... The rest of the stars are still only full And if i set rating on 1.2, only the second star accepts float value, 0.2 the first, etc but the other stars (not in that range) are only or full or empty

Here's some code

ListItem_layout

<TableRow>    
    <RatingBar
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:id="@+id/sportsRatingBar"
        android:gravity="center_horizontal"
        android:focusableInTouchMode="false"
        android:isIndicator="true"
        android:clickable="false"
        android:focusable="false"
        android:layout_column="1"
        android:rating="1.1"
        android:stepSize="0.1" />

ListItem

if(ratingBar!=null) {
                ratingBar.setRating(p.getRating());
                ratingBar.setTag(p.getId());
            }

Reusable class

public float getRating() { return Rating; }

SQLite Table Column for rating

 COLUMN_RATING + " real not null);"

And last, getting from database

c.getFloat(COLUMN_RATING_COL));

some images to explain

I think you don't need any library for this, I just tried it, and it working.

<android.support.v7.widget.AppCompatRatingBar
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    style="?android:attr/ratingBarStyle"
    android:background="@android:color/holo_red_dark"
    android:id="@+id/ratingBar1"
    android:stepSize="0.1"
    android:rating="2.5"/>

I set value of start to 4.5 and it is working that way.

RatingBar ratingBar = (RatingBar) findViewById(R.id.coloredRatingBar1);
    ratingBar.setRating(4.8f);
    ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
        @Override
        public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
            Log.i(TAG, "onRatingChanged: rating : "+rating);
        }
    });