How to use custom inline attributes in xml layout files for customizing style of views

问题

since when I upgraded the Android Support Library, I'm struggling with setting custom colors for buttons, textviews and other views. Apparently, inline attributes get overridden by values defined in the application theme.

I have defined an application theme in values/styles.xml:

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
        <item name="colorControlActivated">@color/colorPrimary</item>
    </style>
    <style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>
    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
</resources>

For instance, in my layout files, I set background and text colors of a button as follows:

<Button
...
android:textColor="@color/colorPrimary"
android:background="@drawable/homebutton"
...
/>

And here's how I define colors in colors.xml:

<resources>
    <color name="colorPrimary">#0066FF</color>
    <color name="colorPrimaryDark">#004AFF</color>
    <color name="colorAccent">#FFFFFF</color>
    <color name="background">#CCCCCC</color>
    <color name="text">#555555</color>
    <color name="green">#009900</color>
    <color name="red">#FF0000</color>
    <color name="orange">#FFA500</color>
    <color name="white">#FFFFFF</color>
    <color name="brown">#7A5230</color>
    <color name="goalkeeper">#FFA500</color>
    <color name="defender">#007c09</color>
    <color name="midfielder">#1d8dc0</color>
    <color name="attacker">#aa0a1c</color>
</resources>

Also, in the Manifest I correctly set the theme:

<application
        android:name=".MyApplication"
        android:allowBackup="true"
        android:icon="@drawable/logo"
        android:label="@string/app_name"
        android:largeHeap="true"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        tools:replace="android:theme">

In the preview everything looks good, however when I launch the app in the simulator all inline attributes are ignored and overridden by the values defined by my application theme. Why so? Why are inline attributes ignored? Is there a way to avoid that?

UPDATE: I'm currently following the solution pointed out here https://code.google.com/p/android/issues/detail?id=203136&q=-has%3Ablocked%20reportedby%3DDeveloper%20attachments%3D2%20label%3AComponent-Support-Libraries&colspec=ID%20Status%20Priority%20Owner%20Summary%20Stars%20Reporter%20Opened It may be an issue caused by a bug in Maven Local repository

回答1:

Found the cause, hence fixed the issue :-)

Apparently the version 29 of the Maven Local Repository (aka m2repository)is buggy, as pointed out here https://code.google.com/p/android/issues/detail?id=203136&q=-has%3Ablocked%20reportedby%3DDeveloper%20attachments%3D2%20label%3AComponent-Support-Libraries&colspec=ID%20Status%20Priority%20Owner%20Summary%20Stars%20Reporter%20Opened and here https://code.google.com/p/android/issues/detail?id=203546

The solution is simple: just downgrade to version 26, which can be downloaded here http://dl.google.com/android/repository/android_m2repository_r26.zip

回答2:

tools:replace="android:theme" this tag is used for manifest merger to tell how to handle spesific cases.

Looks like it changing your theme attribute in manifest at your final product. Can you try to remove that?

For more information you can check here

来源：https://stackoverflow.com/questions/36498361/how-to-use-custom-inline-attributes-in-xml-layout-files-for-customizing-style-of