RatingBar getting stretched when setting drawable

问题

When I am setting progressDrawable to RatingBar its display streched like below image,

xml code is:

<RatingBar
android:id="@+id/rating_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:isIndicator="true"
android:numStars="5"
android:progressDrawable="@drawable/ratingstars"
android:stepSize="1.0" />

ratingstars.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/starfullgray"/>
<item
    android:id="@+android:id/secondaryProgress"
    android:drawable="@drawable/starfullgray"/>
<item
    android:id="@+android:id/progress"
    android:drawable="@drawable/starfull"/>
</layer-list>

how to set Ratings Star height to wrap_content by any way ??

来源：https://stackoverflow.com/questions/23519712/ratingbar-getting-stretched-when-setting-drawable