Using color resource in AndroidManifest.xml leads into build error

[Sebastian1989101]

Steps to Reproduce

1. Creating colors.xml under Resources\values with the used color resource.
2. Use it within the AndroidManifest.xml as shown here:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.SoftwareNotion.MyApp" android:installLocation="auto" android:versionCode="18104" android:versionName="1.6.0">
	<uses-sdk android:minSdkVersion="19" android:targetSdkVersion="27" />
	<permission android:protectionLevel="signature" android:name="${applicationId}.permission.C2D_MESSAGE" />
	<uses-permission android:name="${applicationId}.permission.C2D_MESSAGE" />
	<application android:label="My App" android:icon="@mipmap/ic_launcher" android:roundIcon="@mipmap/ic_launcher_round" android:theme="@style/AppTheme" android:appCategory="productivity" android:largeHeap="true">
		<meta-data android:name="android.max_aspect" android:value="2.1" />
		<meta-data android:name="com.google.firebase.messaging.default_notification_icon" android:resource="@drawable/ic_stat_ic_notification" />
		<meta-data android:name="com.google.firebase.messaging.default_notification_color" android:resource="@color/colorPrimaryDark" />
		<activity android:name="com.google.android.gms.ads.AdActivity" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" android:theme="@android:style/Theme.Translucent" />
	</application>
	<uses-permission android:name="com.android.vending.BILLING" />
	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
	<uses-permission android:name="android.permission.WAKE_LOCK" />
</manifest>

The line <meta-data android:name="com.google.firebase.messaging.default_notification_color" android:resource="@color/colorPrimaryDark" /> is causing the problem.

This is how my colors.xml within Resources\values looks like:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!--Syles-->
    <color name="colorPrimary">#bd8846</color>
    <color name="colorPrimaryDark">#784627</color>
    <color name="colorAccent">#efbb79</color>
    <color name="colorActive">#dc8701</color>
    <color name="colorInactive">#cccccc</color>

    <!-- White to Black -->
    <color name="white">#FFFFFF</color>
    <color name="light_gray">#EFF2F5</color>
    <color name="med_gray">#C7D2DC</color>
    <color name="gray">#5C7082</color>
    <color name="dark_gray">#FF2B343D</color>
    <color name="black">#0D131A</color>
</resources>

Also I can use the colors within my styles.xml without any problem.

Expected Behavior

Should work.

Actual Behavior

Causing the exception No resource found that matches the given name (at 'resource' with value '@color/colorprimarydark'). when compiling.

Version Information

Microsoft Visual Studio Community 2017
Version 15.6.6
VisualStudio.15.Release/15.6.6+27428.2037
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Version 4.7.02556

Installed Version: Community

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Xamarin.iOS and Xamarin.Mac SDK 11.9.1.24 (f62de47)
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Log File

[JonDouglas]

@Sebastian1989101 This looks like a bug to me in Xamarin.Android. Can you try to change the color resource to all lower case and see if it builds successfully(Only in colors.xml, leave it proper cased in the AndroidManifest.xml)? I believe it's being lower-cased by a build task which causes it to not be found by the aapt tooling. If we can confirm this, we can look into a fix.

EX:

    <color name="colorprimarydark">#1B3147</color>

[jawrainey]

I have just experienced this same bug when trying to override default color of notifications via Firebase (see here) as @Sebastian1989101 above.

In my AndroidManifest.xml I have used camelCase (i.e. colorPrimary) to define colors, which produces the same exception as above.

I added another color with all lowercase as @JonDouglas suggested and built and ran as expected (i.e., changing the icon color of notifications). This was alongside colors being defined in camelCase as I use these throughout my application and did not want to also refactor those.

I can confirm that (1) this bug still exists and (2) your suggestion solves it.

[cjrvdev]

This is still happening and changing the colors shouldnt be a solution. Any estimation on this please?

[MaxxDelusional]

I just lost an afternoon to this issue before finally finding this thread.

[upsilondynamics]

This issue really needs to be resolved, I lost an hour and a half today banging my head on the wall until I found this issue. Specifically I am using Firebase push notifications and was trying tp apply a custom color like so:

AndroidManifest.xml
<meta-data android:name="com.google.firebase.messaging.default_notification_color" android:resource="@color/colornotifications" />

colors.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <color name="launcher_background">#FFFFFF</color> <color name="colorPrimary">#3F51B5</color> <color name="colorPrimaryDark">#303F9F</color> <color name="colorAccent">#2196F3</color> <color name="colornotifications">#2196F3</color> <color name="splash_background">#FFFFFF</color> </resources>

You MUST use all lower case, I had camelCase before and wasn't working. Please resolve this issue.

[ryzzyxx]

Well the lowercase trick does not work with me at all. This is weird. Why would a normal use case wouldn't be supported? I have to literally bend over backwards to avoid hardcoding to get a primary Color to Notification service, and convert that to Argb and get the Color Int.
' AndroidManifest.xml: [APT2260] resource color/coloraccent (aka com.vervent.revvi:color/coloraccent) not found.
This error is likely caused by an issue with the AndroidManifest.xml file or an Android manifest generation attribute in a source code file.'