[android-developers] Can GradientColor be used to define a gradient for a fill or stroke entirely in XML?

[Michael Richardson]

I was looking at the document for 
GradientColor 
https://developer.android.com/reference/android/R.styleable.html#GradientColor 
. How can I define a gradient color in XML and apply it to an XML vector 
drawable? 

I have tried in color.xml, styles.xml and within an XML vector drawable. 

I get the error " Failed to convert @id/gradclor into a ColorStateList" 
with: 

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android";
    android:width="120dp"
    android:height="120dp"
    android:viewportWidth="120.0"
    android:viewportHeight="120.0">

    <path
        android:name="play_triangle"
        android:pathData="M 30 30 L 30 90 L 80 60 z"
        android:strokeColor="@id/gradclor"
        android:strokeWidth="5"/>

    <color
        android:name="@+id/gradclor"
        android:startColor="#FFFFFF"
        android:endColor="#00FFFF"
        android:angle="145"/>

</vector>


or 
"Failed to convert #FFFFFFFF #00FFFFFF 145 into a ColorStateList" when 
using: 

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android";
    android:width="120dp"
    android:height="120dp"
    android:viewportWidth="120.0"
    android:viewportHeight="120.0">

    <path
        android:name="play_triangle"
        android:pathData="M 30 30 L 30 90 L 80 60 z"
        android:strokeColor="@color/GradientStrokeBorder"
        android:strokeWidth="5"/>

</vector>


with in color.xml:

<color name="GradientStrokeBorder">
    <item name="android:startColor">#FFFFFF</item>
    <item name="android:endColor">#00FFFF</item>
    <item name="android:angle">145</item>
</color>

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