Android RatingBar: Cannot fill in a partial ratingBar if I customise it's color

Question

I have set the ratingBar color to a different color to Android's default blue and gray - I have made my stars with a black background and pink if they are selected.

This is my code for my mainactivity:

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        RatingBar ratingBar = (RatingBar) findViewById(R.id.ratingbar);
        LayerDrawable layerDrawable2 = (LayerDrawable) ratingBar.getProgressDrawable();
        DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable2.getDrawable(0)),
                ContextCompat.getColor(getApplicationContext(), android.R.color.background_dark));
        DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable2.getDrawable(1)),
                ContextCompat.getColor(getApplicationContext(), R.color.colorAccent)); // Partial star
        DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable2.getDrawable(2)),
                ContextCompat.getColor(getApplicationContext(), R.color.colorAccent));
        ratingBar.setIsIndicator(false);
        ratingBar.setRating(3.6f);
        ratingBar.setStepSize(0.1f);
        ratingBar.invalidate();
        ratingBar.setIsIndicator(true);
    }
}

You can see that if I put in the rating as 3.6, it selects up to 4.

However, if I comment out my own customised colors, the ratingBar sets itself correctly to display only a part of the 4th star as filled in as the value passed to it was 3.6:

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        RatingBar ratingBar = (RatingBar) findViewById(R.id.ratingbar);
/*        LayerDrawable layerDrawable2 = (LayerDrawable) ratingBar.getProgressDrawable();
        DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable2.getDrawable(0)),
                ContextCompat.getColor(getApplicationContext(), android.R.color.background_dark));
        DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable2.getDrawable(1)),
                ContextCompat.getColor(getApplicationContext(), R.color.colorAccent)); // Partial star
        DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable2.getDrawable(2)),
                ContextCompat.getColor(getApplicationContext(), R.color.colorAccent));*/
        ratingBar.setIsIndicator(false);
        ratingBar.setRating(3.6f);
        ratingBar.setStepSize(0.1f);
        ratingBar.invalidate();
        ratingBar.setIsIndicator(true);
    }
}

Why is it that if I create my own custom colors, the ratingBar doesn't fill itself properly?

I have created a small repo and you can download it and test it here: https://github.com/Winghin2517/RatingBarTest2

EDIT:

FlyingPumba's library shows some promise on what I want to achieve but I would need a style where the stars background is white when it appears on the screen and it will be filled by a solid color when users press the star. In my case, I want it to be filled with a green color.

The below is what I was able to achieve but it is not quite there yet. I changed the scrollview background in which the stars sit to pink so that you can see that instead of a white background for the stars, the pink from the scrollview background shines through. For my use case , I want white stars to sit in front of an imageview and I do not want the image in the imageview to shine through the stars.

Also I do not need white stroke for the stars at all as I want to keep the styling of the stars simple.

<com.iarcuschin.simpleratingbar.SimpleRatingBar
    android:id="@+id/ratingBar3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="8dp"
    app:srb_rating="3.6"
    app:srb_fillColor="@color/material_greenA700"
    app:srb_borderColor="@color/material_white"
    app:srb_starBorderWidth="0"
    app:srb_pressedFillColor="@color/material_greenA700"
    app:srb_starSize="30dp"
    />

Answer 1

You are on the right track with what you are trying. The only thing you have done wrong is to assign the wrong colour to the 2nd drawable.

Think of the 2nd drawable as the background of the star, not the foreground. So the partial stars need the background colour, not the colour of the stars i.e. in your example, black, not pink.

Below is the corrected code, which works as described. I have reformatted it slightly to highlight the change required.

    RatingBar ratingBar = (RatingBar) findViewById(R.id.ratingbar);
    LayerDrawable layerDrawable2 = (LayerDrawable) ratingBar.getProgressDrawable();

    // No star
    DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable2.getDrawable(0)),
            ContextCompat.getColor(getApplicationContext(),
                    android.R.color.background_dark));

    // Partial star 
    DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable2.getDrawable(1)),
            ContextCompat.getColor(getApplicationContext(),
                    // use background_dark instead of colorAccent
                    // R.color.colorAccent));
                    android.R.color.background_dark));

    // Custom star
    DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable2.getDrawable(2)),
            ContextCompat.getColor(getApplicationContext(),
                    R.color.colorAccent));

---

Another way to do this, and possibly better in many cases, is to use proper styling on the RatingBar.

This requires setting a custom style for the rating bar, then defining the layer drawables used by that style to point to your own images or colours.

I am not going to go into further detail, because the actual xml code is shown in Anantham's answer.

Answer 2

in Activity.java:

oncreate :

       RatingBar   setRatingBar = (RatingBar) findViewById(R.id.setRating);
       float rating = Float.parseFloat(listString);
      // onRatingChanged(setRatingBar, 0.0f, true);

        public void onRatingChanged(RatingBar rateBar, float rating, boolean fromUser) {
    try {
        DecimalFormat decimalFormat = new DecimalFormat("#.#");
        curRate = Float.valueOf(decimalFormat.format((curRate * count + rating)/ ++count));
        float userRatePoint = curRate/**20*/;

        setRatingBar.setRating(userRatePoint);
        countText = (TextView) findViewById(R.id.countText);
        countText.setText(userRatePoint + " Ratings");
    } catch (Exception e) {
        e.printStackTrace();
    }
}

then try this for smallstar rating bar:

    <RatingBar
     android:id="@+id/setRating"
     style="?android:attr/ratingBarStyleSmall"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_marginLeft="10dp"
     android:layout_marginTop="3dp"
     android:isIndicator="true"
     android:numStars="5"
     android:stepSize="0.1" />
       //if you want to style please use "foodRatingBar"
       //for custom star image use  "ratingstar"

style.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="foodRatingBar" parent="@android:style/Widget.RatingBar">
    <item name="android:progressDrawable">@drawable/ratingstar</item>
    <item name="android:minHeight">22dip</item>
    <item name="android:maxHeight">22dip</item>
</style>

values v11/styles.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="foodRatingBar" parent="@android:style/Widget.RatingBar">
    <item name="android:progressDrawable">@drawable/ratingstar</item>
    <item name="android:minHeight">22dip</item>
    <item name="android:maxHeight">22dip</item>
</style>

values v14/styles.xml

 <resources>
   <style name="foodRatingBar" parent="@android:style/Widget.RatingBar">
    <item name="android:progressDrawable">@drawable/ratingstar</item>
    <item name="android:minHeight">22dip</item>
    <item name="android:maxHeight">22dip</item>
</style>
<!--
    Base application theme for API 14+. This theme completely replaces
    AppBaseTheme from BOTH res/values/styles.xml and
    res/values-v11/styles.xml on API 14+ devices.
-->
<style name="AppBaseTheme" parent="android:Theme.Holo.Light.DarkActionBar">
    <!-- API 14 theme customizations can go here. -->
</style>
</resources>

ratingstar.xml - this is where the custom progress images are defined

<?xml version="1.0" encoding="utf-8"?>
    <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:id="@android:id/background"
            android:drawable="@drawable/ratingstar_default" />
        <item android:id="@android:id/secondaryProgress"
            android:drawable="@drawable/ratingstar_default" />
        <item android:id="@android:id/progress"
            android:drawable="@drawable/ratingstar_selected" />
    </layer-list>
</resources>