How to create Custom Ratings bar in Android

Edit

Have a look at custom rating in motorola http://community.developer.motorola.com/t5/Android-App-Development-for/custom-rating-bar-style-using-android-s-ratingBar-small-style/td-p/10462

Updated

styles.xml

This must be located in your values folder

 <?xml version="1.0" encoding="utf-8"?>
  <resources>
    <style name="foodRatingBar" parent="@android:style/Widget.RatingBar">
       <item name="android:progressDrawable">@drawable/food_rating_bar_full</item>
       <item name="android:minHeight">23dip</item>
       <item name="android:maxHeight">25dip</item>
   </style>
  </resources>

food_rating_bar_full.xml

This file must be in Drawable folder.

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

food_ratingbar_full_empty.xml

This file must be inside Drawable folder.

<?xml version="1.0" encoding="utf-8"?>

<!-- This is the rating bar drawable that is used to
 show a filled cookie. -->
<selector
xmlns:android="http://schemas.android.com/apk/res/android">

<item android:state_pressed="true"
      android:state_window_focused="true"
      android:drawable="@drawable/cookiee" />

<item android:state_focused="true"
      android:state_window_focused="true"
      android:drawable="@drawable/cookiee" />

<item android:state_selected="true"
      android:state_window_focused="true"
      android:drawable="@drawable/cookiee" />

<item android:drawable="@drawable/cookiee" />

</selector>

food_ratingbar_full_filled.xml

This file must be located in Drawable folder.

<?xml version="1.0" encoding="utf-8"?>

 <!-- This is the rating bar drawable that is used to
 show a unfilled cookie. -->
<selector
xmlns:android="http://schemas.android.com/apk/res/android">

<item android:state_pressed="true"
      android:state_window_focused="true"
      android:drawable="@drawable/cookie" />

<item android:state_focused="true"
      android:state_window_focused="true"
      android:drawable="@drawable/cookie" />

<item android:state_selected="true"
      android:state_window_focused="true"
      android:drawable="@drawable/cookie" />

<item android:drawable="@drawable/cookie" />

</selector>

main.xml file should look like :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <RatingBar android:id="@+id/ratingBar1"
        style="@style/foodRatingBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

    </RatingBar>
</LinearLayout>

MainActivity.class should look like :

import android.app.Activity;
import android.os.Bundle;
import android.widget.RatingBar;
import android.widget.RatingBar.OnRatingBarChangeListener;
import android.widget.Toast;

public class MainActivity extends Activity {
/** Called when the activity is first created. */

RatingBar rb;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    rb=(RatingBar)findViewById(R.id.ratingBar1);

    rb.setOnRatingBarChangeListener(new OnRatingBarChangeListener(){

        @Override
        public void onRatingChanged(RatingBar ratingBar, float rating,
                boolean fromUser) {
            // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(),Float.toString(rating),Toast.LENGTH_LONG).show();

        }

    }); 
}
}

I have used two images:

cookie.jpg

cookiee.jpg

This two images are of same size one is used for identifying selected Rating Bar and other for identifying unselected RatingBar

I need to add my solution which is WAY eaiser than the one above. We don't even need to use styles.

Create a selector file in the drawable folder:

custom_ratingbar_selector.xml

<?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/star_off" />

 <item android:id="@android:id/secondaryProgress"
    android:drawable="@drawable/star_off" />

 <item android:id="@android:id/progress"
    android:drawable="@drawable/star_on" />

</layer-list>

In the layout set the selector file as progressDrawable:

 <RatingBar
        android:id="@+id/ratingBar2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="20dp"
        android:progressDrawable="@drawable/custom_ratingbar_selector"
        android:numStars="8"
        android:stepSize="0.2"
        android:rating="3.0" />

And that's all we need.