Android Studio error: No resource found

Question

I am receiving the following messages in my console:

Error:(15, 22) No resource found that matches the given name: attr 'colorAccent'. Error:(13, 22)

No resource found that matches the given name: attr 'colorPrimary'. Error:(14, 22)

No resource found that matches the given name: attr 'colorPrimaryDark'.

This is my style.xml file:

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <style name="AppBaseTheme" parent="android:Theme.Holo">

        <item name="colorPrimary">@color/color_primary</item>
        <item name="colorPrimaryDark">@color/color_secondary</item>
        <item name="colorAccent">@color/color_accent</item>
    </style>
</resources>

my color.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="cyan">#6441a5</color>
    <color name="color_primary">#6441a5</color>
    <color name="color_secondary">#6441a5</color>
    <color name="color_accent">#6441a5</color>

</resources>

After searching and viewing many other solutions most answer said to change the target SDK to 21: Here is my manifest file:

<uses-sdk
    android:minSdkVersion="15"
    android:targetSdkVersion="21" />

And my build grade:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    compileOptions.encoding = 'utf-8'

    defaultConfig {
        applicationId "com.test.test"
        minSdkVersion 15
        targetSdkVersion 21
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }
}

dependencies {
    compile 'com.android.support:support-v4:21.0.0'
}

But this still hasn't worked. What could be the issue here?

Answer 1

If you are using the colorPrimary, colorPrimaryDark, and colorAccent attributes without the android: namespace, this indicates that you are using the support library.

I would check to see if you have added the v7 support library in your dependencies, and make sure that your app theme has a parent of one of the Theme.AppCompat styles.

This also means you need to add compile 'com.android.support:appcompat-v7:21.+' into your Gradle dependencies and your Activity files must extend AppCompatActivity.

---

Your relevant files should look something like this (I have used the reference/attribute names as you put in your answer):

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    ... >

    ...

    <application
        ...
        android:theme="@style/AppBaseTheme" >

    ...

styles.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="AppBaseTheme" parent="Theme.AppCompat">
        <item name="colorPrimary">@color/color_primary</item>
        <item name="colorPrimaryDark">@color/color_secondary</item>
        <item name="colorAccent">@color/color_accent</item>
    </style>

    ...

colors.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <color name="color_primary">#6441a5</color>
    <color name="color_secondary">#6441a5</color>
    <color name="color_accent">#6441a5</color>

    ...

YourActivity.java:

....

public class DetailActivity extends AppCompatActivity {

....

}

build.gradle:

...

dependencies {
    ...
    compile 'com.android.support:appcompat-v7:21.+'
    ...
}

Make sure you have included the lines I have listed above.

Of course, where I have put ... indicates that you may have put other code there, so don't literally put ... into your code.

---

Also, note that if you are using Gradle, the version/API declarations in the manifest are irrelevant. Therefore, you should be able to remove this without any errors occurring:

<uses-sdk
    android:minSdkVersion="15"
    android:targetSdkVersion="21" />