Android invalid color state list tag gradient

Question

I've an app with over 5000 downloads and more than 500 users active daily and out of nowhere I started get an weird error on Crashlytics:

Caused by android.content.res.Resources$NotFoundException: File res/drawable-anydpi-v24/ic_tickets.xml from drawable resource ID #0x7f0700b3
       at android.content.res.Resources.loadDrawableForCookie(Resources.java:2748)
       at android.content.res.Resources.loadDrawable(Resources.java:2643)
       at android.content.res.TypedArray.getDrawable(TypedArray.java:870)
       at android.widget.TextView.<init>(TextView.java:921)
       at android.widget.TextView.<init>(TextView.java:703)
       at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:76)
       at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:72)
       at java.lang.reflect.Constructor.newInstance(Constructor.java)


Caused by android.content.res.Resources$NotFoundException: File res/drawable-anydpi-v24/$ic_tickets__0.xml from color state list resource ID #0x7f070017
       at android.content.res.Resources.loadColorStateListForCookie(Resources.java:2858)
       at android.content.res.Resources.loadColorStateList(Resources.java:2807)
       at android.content.res.TypedArray.getColor(TypedArray.java:439)
       at android.graphics.drawable.VectorDrawable$VFullPath.updateStateFromTypedArray(VectorDrawable.java:1605)
       at android.graphics.drawable.VectorDrawable$VFullPath.inflate(VectorDrawable.java:1584)
       at android.graphics.drawable.VectorDrawable.inflateInternal(VectorDrawable.java:666)
       at android.graphics.drawable.VectorDrawable.inflate(VectorDrawable.java:571)
       at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:1215)
       at android.graphics.drawable.Drawable.createFromXml(Drawable.java:1124)


Caused by org.xmlpull.v1.XmlPullParserException: Binary XML file line #6: invalid color state list tag gradient
       at android.content.res.ColorStateList.createFromXmlInner(ColorStateList.java:217)
       at android.content.res.ColorStateList.createFromXml(ColorStateList.java:201)
       at android.content.res.Resources.loadColorStateListForCookie(Resources.java:2854)
       at android.content.res.Resources.loadColorStateList(Resources.java:2807)
       at android.content.res.TypedArray.getColor(TypedArray.java:439)
       at android.graphics.drawable.VectorDrawable$VFullPath.updateStateFromTypedArray(VectorDrawable.java:1605)

The stack trace is way longer than this, more than 500 lines on Crashlytics, I pasted here what I thought might be useful to understand the problem.

If I got it right it is complaining like one of my resources is missing or corrupted; what could it be?

But the resource is intact in the apk:

<vector android:height="24dp" android:viewportHeight="512"
    android:viewportWidth="512" android:width="24dp"
    xmlns:aapt="http://schemas.android.com/aapt" xmlns:android="http://schemas.android.com/apk/res/android">
    <path android:pathData="M381.845,292.27c0,11.032 -8.943,19.975 -19.975,19.975s-19.975,-8.943 -19.975,-19.975c0,-11.032 8.943,-19.975 19.975,-19.975S381.845,281.238 381.845,292.27zM361.869,332.221c-11.032,0 -19.975,8.943 -19.975,19.975s8.943,19.975 19.975,19.975s19.975,-8.943 19.975,-19.975S372.902,332.221 361.869,332.221zM361.869,392.147c-11.032,0 -19.975,8.943 -19.975,19.975s8.943,19.975 19.975,19.975s19.975,-8.943 19.975,-19.975S372.902,392.147 361.869,392.147zM307.418,136.36c-9.983,4.696 -14.268,16.596 -9.572,26.578c4.696,9.983 16.596,14.268 26.578,9.572c9.983,-4.696 14.268,-16.596 9.572,-26.578C329.3,135.95 317.401,131.664 307.418,136.36zM451.759,352.197c0,22.029 17.922,39.951 39.951,39.951h19.975V512H0.314V392.147H20.29c22.029,0 39.951,-17.922 39.951,-39.951s-17.922,-39.951 -39.951,-39.951H0.314V192.393h0.509l-0.042,-0.089L408.489,0l50.866,108.128l-17.013,8.861c-13.29,6.921 -21.544,20.506 -21.544,35.453c0,22.029 17.922,39.951 39.951,39.951h50.937v119.853H491.71C469.681,312.246 451.759,330.168 451.759,352.197zM94.244,192.393h297.352c-6.822,-11.763 -10.75,-25.403 -10.75,-39.951c0,-23.307 10.023,-44.953 27.021,-59.913l-18.505,-39.335l-81.134,38.269c4.355,9.886 0.068,21.491 -9.762,26.115c-9.818,4.618 -21.473,0.536 -26.323,-9.095L94.244,192.393zM411.808,352.197c0,-37.163 25.503,-68.482 59.926,-77.374v-42.479h-89.889c0,11.032 -8.943,19.975 -19.975,19.975s-19.975,-8.943 -19.975,-19.975H40.265v42.479c34.424,8.891 59.926,40.211 59.926,77.374s-25.503,68.482 -59.926,77.374v42.479h301.629c0,-11.032 8.943,-19.975 19.975,-19.975s19.975,8.943 19.975,19.975h89.889V429.57C437.31,420.678 411.808,389.36 411.808,352.197z">
        <aapt:attr name="android:fillColor">
            <gradient android:endX="256.00745" android:endY="511.99982"
                android:startX="256.00745"
                android:startY="-0.0150070675" android:type="linear">
                <item android:color="#FF2AF598" android:offset="0"/>
                <item android:color="#FF009EFD" android:offset="1"/>
            </gradient>
        </aapt:attr>
    </path>
</vector>

The drawable is a very small and simple icon for a button in the app, I downloaded it from a icon library it opens and run fine on all my tests.

The second weird thing about this is that over 500 active users I had today this is happening only with 4 users all with the same smartphone:

Device
Brand: LGE
Model: LG K10 LTE
Orientation: Portrait
RAM free: 170.92 MB
Disk free: 574.64 MB
Operating System
Version: 6.0
Orientation: Portrait
Rooted: No
Crash

Is there any know issue about this smartphone model? What can I do in order to fix this for the affected users?

Answer 1

This is because you use a few attributes not supported prior to API level 24.

eg. startX, endX, startY, endY and offset.

Android Marshmallow 6.0 is API level 23 ...

That invalid color state list tag gradient is coming from the offset:

<item android:color="#FF2AF598" android:offset="0"/>
<item android:color="#FF009EFD" android:offset="1"/>

This issue most likely isn't LG specific, but Marshmallow specific.