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I try to make a custom Drawable by using attribute but I have an inflating error

01-21 11:01:06.171: E/AndroidRuntime(13695): Caused by: android.content.res.Resources$NotFoundException: File res/drawable/action_bar_background.xml from drawable resource ID #0x7f020000

My action_bar_background.xml

<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" > <gradient android:angle="90" android:endColor="?attr/ActionBarEndColor" android:startColor="?attr/ActionBarStartColor" /> </shape>

My attr.xml

<?xml version="1.0" encoding="utf-8"?> <resources> <attr name="ActionBarStartColor" format="reference|color" /> <attr name="ActionBarEndColor" format="reference|color" /> </resources>

My themes.xml

<?xml version="1.0" encoding="utf-8"?> <resources> <style name="Theme.Theme1" parent="@style/Theme.GreenDroid.Light.NoTitleBar"> <item name="ActionBarStartColor">@color/greyDark</item> <item name="ActionBarEndColor">@color/greyLight</item> </style> <style name="Theme.Theme2" parent="@style/Theme.GreenDroid.Light.NoTitleBar"> <item name="ActionBarStartColor">@color/myRed</item> <item name="ActionBarEndColor">@color/myWhite</item> </style> </resources>

I don't undestand why, my attribute is a reference or a color, if I "force" the color in themes.xml, it don't work too.

Can anybody help?

I've found this question but it's not resolve my problem.

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  • The only solution i've found, it's to use multiple drawable file with the choosen color and make the reference in the theme file. Commented Jan 23, 2012 at 23:03
  • 1
    This issue was solved in Android L preview, as specified here: code.google.com/p/android/issues/detail?id=26251 Commented Jul 10, 2014 at 6:50
  • I found this fixed in Lollipop, but still doesn't work Kitkat and less Commented Nov 20, 2014 at 21:21

1 Answer 1

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13

Good news everyone! Starting Lollipop (21) you can use attributes to reference stuff like colors e.g. ?attr/colorPrimary.

Original answer:

As far I know you cannot reference style attributes from drawables, I couldn't find an usage like that in Android platform resources ($ANDROID_HOME/platforms/android-*/data/res/), all I see is that every drawable even for gradient drawables are defined in place or they just reference other drawables like color drawables.

Here is a related bug report for this (star it):

https://code.google.com/p/android/issues/detail?id=26251

You can workaround this by using separate xml drawables like explained at:

https://stackoverflow.com/a/13471695/172670

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1 Comment

Unfortunately it will still crash on anything lower than API 21. (So on devices running KitKat or lower it will still crash.)

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