Cannot resolve symbol '?attr/actionBarSize' after updating Android Studio from 2.3 to 3.0 for buildToolsVersion '26.0.2'

Question

After updating Android Studio from 2.3 to 3.0 I changed buildToolsVersion from 26.0.0 to 26.0.2 and after that I am getting this error:

Cannot resolve symbol '?attr/actionBarSize

Xml code:

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="@color/colorPrimary"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    app:titleTextColor="@android:color/white"/>

Dependencies:

compile 'com.android.support:appcompat-v7:26.1.0'
compile 'com.android.support:design:26.1.0'

Maybe you hava upgraded the version of gradle. – Evan Apr 24 '18 at 10:35 — Evan, Apr 24 '18 at 10:35
Trying clicking Build > Clean Project – Michael N Nov 29 '21 at 17:52 — Michael N, Nov 29 '21 at 17:52

score 249 · Accepted Answer · edited Jun 27 '18 at 11:15

249

Nothing helped, but changing:

?attr/actionBarSize to ?android:attr/actionBarSize did the job.

That's actually a bug in few versions. Even if you won't fix it, Android will automatically fix it at runtime.

edited Jun 27 '18 at 11:15

Kunwar Ajeet Singh Rajput

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answered Mar 28 '18 at 11:07

Victoria Klimova

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20

I think `?android:attr/actionBarSize` is only compatible with api 21, `?attr/actionBarSize` requires a pre-21 sdk installed for Android Studio to see it. The other issue for me was making sure the compileSdk and support libs have the same major version number (27 in my case) – Daniel Wilson Apr 06 '18 at 18:32
2

Hmmm, seems a little magical, but it works. I'd love to see a definitive explanation that describes precisely what breaks with the various sdks and what works and why. – SMBiggs May 16 '18 at 05:22
it seems like a bug because the project compile and build ok with this error. – LMaker Aug 02 '18 at 20:04

Kunwar Ajeet Singh Rajput · Answer 2 · 2018-06-27T10:18:24.703

34

Update all your library versions to 26.1.0 (to the most recent version) and also add:

compile 'com.android.support:support-v4:26.1.0'

if you are using Android Studio 3.0.0 and above then use

implementation 'com.android.support:support-v4:26.1.0'

Sync your project and the error will automatically resolve because ?attr/actionBarSize is part of v4 library.

edited Jun 27 '18 at 10:18

answered Oct 31 '17 at 11:42

Kunwar Ajeet Singh Rajput

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specify which library version you are talking about – D_Alpha Oct 31 '17 at 11:50
I had to change : implementation 'com.android.support:support-v4:26.1.0' to compile 'com.android.support:support-v4:26.1.0' – Louis Parkin Mar 08 '18 at 16:11
1

Use `implementation` instead of `compile` now. – Suragch Apr 07 '18 at 02:13
I think this answer should not be the selected answer. Because it forces you to use the support-v4 library when you don't have to. You can Sid and Victoria Klimova's answer is the best answer, you can avoid using unnecessary library in your project easily... – Evren Yurtesen Apr 13 '18 at 12:23
This answer didn't even help me. Sid's answer helps, but I don't understand why do I need `android:` prefix when I have already added `android` namespace `xmlns:android="http://schemas.android.com/apk/res/android"` does anybody know? – user1209216 Apr 17 '18 at 06:37
This answer was true for older version of android studio but now it's not working for new version so I am accepting @VictoriaKlimova's answer as correct. Thanks EvrenYurtesen for pointing this. – Rahul Roshan May 08 '18 at 04:23
I agree with @Suragch compile has is being replaced with implementation – George Jul 01 '18 at 18:02

score 28 · Answer 3 · answered Jun 02 '18 at 19:41

28

In the project directory hierarchy switch "Android" to "Project". Then delete a folder ".idea/libraries", only "libraries". Select an option from the menu "File -> Invalidate Caches / Restart... -> Invalidate and Restart".

answered Jun 02 '18 at 19:41

Oleh Kholiavchuk

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This worked for me too. But curious, why it did. What exactly does "Invalidate Caches / Restart" do? – Anil Gorthy Jul 23 '18 at 19:28
Thanks. It worked for me with `com.android.support:support-v4:27.1.1` – Arash Oct 05 '18 at 07:33

score 11 · Answer 4 · answered Nov 27 '17 at 06:02

11

Good day, I know this is a bit late.

but I have encountered this one too, when I updated to Android Studio 3.0

what i did is I changed

compile 'com.android.support:support-v4:26.1.0'

to

implementation 'com.android.support:support-v4:26.1.0'

Hope it can help somebody.

answered Nov 27 '17 at 06:02

Chris Palma

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support_library = '27.1.1' to support_library = '27.1.0' worked for me. not sure why downgrading fixed. – The Tokenizer Jun 06 '18 at 22:25

score 4 · Answer 5 · answered Nov 04 '17 at 00:31

This is what I did to fix exactly the same problem. 1. Go to SDK manager. 2. Check Android API 27 and Android 8.0 (Oreo) 3. Click "Apply" to download and install those SDKs 4. In build.gradle, change the 'buildToolsVersion "26.0.1"' to 'buildToolsVersion "26.0.2"' and do a gradle sync.

Hope this can help fix your issue.

score 3 · Answer 6 · answered Nov 24 '17 at 14:37

3

Your buildToolsVersion version differs from version in dependencies (e.g. buildToolsVersion is 27.0.0 but implementation 'com.android.support:support-v4:27.0.1'). Make them the same.

answered Nov 24 '17 at 14:37

Andrew Glukhoff

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score 2 · Answer 7 · answered Apr 02 '18 at 02:12

my problem solved by changing compileSdkVersion and targetSdkVersion from 26 to the last version 27, also u need to upgrade ur dependencies to 27.

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com......"
        minSdkVersion 15
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:27.1.0'
    implementation 'com.android.support:design:27.1.0'
}

hope this solve ur problem too :)

score 1 · Answer 8 · edited Jan 23 '18 at 15:39

1

Try to add this in your build.gradle(app) dependencies:

resolutionStrategy {
    force libraries.support.appCompat
    force libraries.support.design
    force 'com.android.support:support-utils:26.0.1'
    force 'com.android.support:support-compat:26.0.1'
}

edited Jan 23 '18 at 15:39

milosmns

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answered Oct 31 '17 at 11:50

petrrr33

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score 1 · Answer 9 · answered Apr 14 '18 at 04:27

1

This worked.

I have updated the compile and support lib versions from 26.x.x to 27.x.x.

answered Apr 14 '18 at 04:27

Mahi

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score 1 · Answer 10 · answered Aug 10 '18 at 18:55

I tried all the answers here and so many others from lots of places but only the below techniques worked for me. The simple way is you just need to close the project then import the same project as a Gradle project Or you can go to Project structure -> project -> change Gradel plugin = 4.4 and Android plugin version = 3.1.4. Both of these above methods work.

Note: These versions(4.4, 3.1.4) are latest when I write this answer please use the latest version instead of these.

score 1 · Answer 11 · answered Oct 23 '20 at 15:21

1

Same issue here, if you're using AndroidX add this :

implementation 'androidx.legacy:legacy-support-v4:1.0.0'

answered Oct 23 '20 at 15:21

Mouaad Abdelghafour AITALI

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score 1 · Answer 12 · answered Jan 11 '21 at 09:20

1

Change R.attr.actionBarSize to androidx.appcompat.R.attr.actionBarSize.

answered Jan 11 '21 at 09:20

CoolMind

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score 0 · Answer 13 · answered Apr 24 '18 at 10:38

0

Maybe you hava upgraded the version of gradle. when my gradle version is 4.4 and plugin version is 3.1.1.It is ok.

answered Apr 24 '18 at 10:38

Evan

214
3
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score 0 · Answer 14 · answered Jun 08 '18 at 02:22

0

this work:

delete all file in $HOME/.gradle/caches/transforms-1/files-1.1/appcompat-v7-27.1.1.aar

answered Jun 08 '18 at 02:22

Better

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score 0 · Answer 15 · answered Jul 04 '18 at 08:15

0

Changed all Support Library versions to the newest 27.1.1 and the error was gone.

answered Jul 04 '18 at 08:15

Darush

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score 0 · Answer 16 · answered Jul 26 '18 at 09:55

0

please replace android support libraries.

from

27.1.1

to

28.0.0-alpha3

and replace 27 to 28 for following cases:

compileSdkVersion 28
buildToolsVersion "28.0.0"
targetSdkVersion 28

this will fix the issue.

answered Jul 26 '18 at 09:55

Ahamadullah Saikat

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Cannot resolve symbol '?attr/actionBarSize' after updating Android Studio from 2.3 to 3.0 for buildToolsVersion '26.0.2'

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