Unknown attribute android:layout_width, layout_height, id, gravity, layout_gravity, padding

Question

Getting Unknown attribute error on all android tag.
In layout XML, Auto suggestion is not showing all attributes (like layout_width, layout_height, orientation, orientation & all others android attributes.)

Here is a Snap shot

Things i have done to resolve this issue.

Clean Build & Rebuild
Deleted .idea file
Invalidated Caches/ Restart.. option
Turn On Power Save Mode.

SDk is up to date.

In App Level Gridle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.example.abhishek.ondemandservice"
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'),     'proguard-rules.pro'
        }
    }
}

Application level Gride.

buildscript {
    repositories {
        maven { url "http://dl.bintray.com/populov/maven" }
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.5.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        maven { url "http://dl.bintray.com/populov/maven" }
        jcenter()
        mavenCentral()
    }
}

why do i use older version if it works perfect in other systems and it's not working that way. — Abhishek, Feb 10 '16 at 07:01
You might want to accept one of the answers if they fixed your issue — Benoit Duffez, Apr 08 '18 at 18:03
This worked for me check this llink https://stackoverflow.com/a/52965770/8648075 — M.J.M, Dec 20 '18 at 12:55

score 54 · Answer 1 · answered Dec 14 '17 at 09:26

54

Just go to Tools->Android->Sync Project with Gradle Files

answered Dec 14 '17 at 09:26

Marius Gheorghe

577
4
7

11

Just to add - in Android Studio 3.1 there's a button called "Sync project with gradle files" between "revert" and "avd manager" buttons in a right corner of a toolbar. – Kirill Starostin May 23 '18 at 05:31
9

And in 3.1.2 it's far left, between "Save All" and "Sync with File System". – Jake Lee Jun 28 '18 at 15:48

score 47 · Answer 2 · edited Mar 22 '19 at 20:03

47

The only thing that worked for me was cleaning the following folders:

c:\Users\<user>\.gradle\caches\
c:\Users\<user>\.AndroidStudio3.2\system\caches\

Android Studio will just redownload the libraries and caches them which will enable everything back to normal.

Source: https://stackoverflow.com/a/53053438/7515903

Credits: @alexuz

edited Mar 22 '19 at 20:03

Allan Veloso

3,918
1
27
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answered Oct 30 '18 at 15:23

Mohamed Akl

612
5
14

Could you please provide more details than just a link, in case the linked answer is deleted or changed in the future? – TheIT Dec 20 '18 at 00:04
@TheIT thanks for your suggestion, I have edited the response – Mohamed Akl Jan 16 '19 at 03:45
Similar solution here (to a different problem) that worked for me: https://stackoverflow.com/a/52687462/1617737 – ban-geoengineering Mar 25 '19 at 19:26
1

I tries everything everyone suggested, nothing helped. I deleted everything inside c:\Users\\.gradle\caches\ and it fixed it (I took it from https://stackoverflow.com/a/53053438/7515903, but I didn't need to delete the other suggestion) – Tiferet Cohen Nov 25 '18 at 15:53
This solved my problem. But not the first time I have to solve this such a problem by literally rebuilding my entire project. Almost every AS update is the same. Wish iOS was bigger so I could just switch to that. sad – Jakub Kostka Jun 17 '19 at 11:10
1

The best answer! Thanks you lot – shariful islam Jan 09 '20 at 19:22
1

Thanks. It also fixed all the connections in my project. – SportAtomDroid Jan 21 '20 at 16:09

score 14 · Answer 3 · answered Nov 30 '17 at 20:36

14

To fix, change something in your gradle file, then sync gradle again. This worked for me.

Credit: https://stackoverflow.com/a/47500156/5673746

answered Nov 30 '17 at 20:36

mco

1,633
11
25

1

Worked like magic.. Been stuck on this for almost three days! Thanks a lot.. I wish you less bugs! – Taslim Oseni Aug 01 '18 at 19:14

score 11 · Answer 4 · answered Jan 11 '18 at 15:23

11

I tried:

Removing the build folders
Cleaning the project
Sync Project with Gradle Files

But nothing worked. Finally using File > Invalidate caches fixed the error.

answered Jan 11 '18 at 15:23

vovahost

25,072
12
95
99

1

Funny. For me, invalidate caches didn't work but sync with Gradle did. Guess there are multiple potential causes to this issue. – methodsignature Oct 29 '18 at 12:31
Sometimes just closing ad reopening Android Studio can fix this type of issues. – vovahost Dec 21 '18 at 09:17
Tried that but it didn't work. I did a similar thins: deleted C:\Users\.AndroidStudio3.2\system\caches. See stackoverflow.com/a/52965770/8648075 as @M.J.M suggested. – Hristova Jan 05 '19 at 23:16

score 6 · Answer 5 · answered Feb 08 '19 at 10:15

Any of these ways will possibly fix your problem (unknown attribute android:layout-width)

Sync project with Gradle file (File -> Sync project with Gradle files)
Invalidate cache and restart (File -> Invalidate cache and restart -> Invalidate and restart)
Delete .gradle and .idea file from the project folder and rebuild the project.
Delete caches folder from Android studio (.AndroidStudio3.2 -> system -> caches)

score 5 · Answer 6 · answered Dec 15 '17 at 03:38

I too encountered this..

Just delete the .idea folder that is in the project location
Build > Clean Project
Then change something in the app level gradle

Then android studio will ask you to sync the project. Go ahead and sync, the problem will be gone

score 5 · Answer 7 · answered Oct 11 '18 at 09:02

Had the same issue, but after a reinstall of visual studio, so what helped for me on Android studio 3.2, was to go and upgrade the target version to 28 and compile version 28. Was at version 27 before.

I had to upgrade these packages as well

implementation "com.android.support:support-v4:28.0.0"
implementation 'com.android.support:support-core-ui:28.0.0'

After Gradle had synced then it worked for me.

score 3 · Answer 8 · edited Dec 01 '18 at 14:30

3

if non of above answers dosn't work do these steps:

first close android studio.
than just go to windows>User or AppData>local> and delete androidstudio last version folder
reopen androidstuduio and set default settings

edited Dec 01 '18 at 14:30

Farzad Farzin

3
1

answered Nov 07 '18 at 10:40

Mohammad Hadi

1,246
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score 2 · Answer 9 · answered Apr 26 '18 at 20:05

2

In my case none of the above solutions worked for me, but changing the minSdkVersion to a higher version and doing a gradle sync after that did the trick, maybe this would be useful to somebody.

answered Apr 26 '18 at 20:05

Mazen el Senih

101
1
4

score 1 · Answer 10 · edited Oct 05 '18 at 08:20

1

None of the existing suggestion works for me. I solved this issue by reinstalling Android Studio. Really weird.

edited Oct 05 '18 at 08:20

Eric Aya

68,765
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165
232

answered Oct 05 '18 at 03:46

Hulu

11
1

After trying everything else on this list, my only solution was to reinstall from scratch. What a waste of time! – Panos Gr Nov 03 '18 at 18:13

score 1 · Answer 11 · answered Oct 18 '18 at 05:15

1

I had to

Delete Android SDK from AppData\Local\Android\Sdk
Reinstall Android Studio

answered Oct 18 '18 at 05:15

Sami Rajala

191
1
11

score 1 · Answer 12 · answered Sep 08 '20 at 13:34

1

I´ve tryed all the solutions but the only thing that worked for me was 4gus71n's answer.

Deleting the C:\Users.AndroidStudio3.2\system\caches folder solved my problem.

Link to his answer: https://stackoverflow.com/a/53160674/6568421

answered Sep 08 '20 at 13:34

Abdullah Morsi

21
4

score 0 · Answer 13 · answered Nov 16 '18 at 19:01

0

I just changed my android SDK path and restart android studio->set new SDK path it working

answered Nov 16 '18 at 19:01

Ashik Azeez

368
4
7

score 0 · Answer 14 · answered Sep 11 '19 at 10:34

0

Just update your android studio: Help -> Check for Updates..

answered Sep 11 '19 at 10:34

Tal Fiskus

11
2

score -1 · Answer 15 · edited Sep 03 '20 at 20:57

-1

I changed the compileSdkVersion/buildToolsVersion/targetSdkVersion from 30 to 29 in build.gradle and the problem disappeared for me.

edited Sep 03 '20 at 20:57

Yunnosch

21,438
7
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answered Sep 03 '20 at 20:27

Littlefogcat

37
3

Please leave the decision whether this solves "it" to the question author. Also keep speculation out of the answer. You can write it into a comment (on your own post you can). – Yunnosch Sep 03 '20 at 20:57

Unknown attribute android:layout_width, layout_height, id, gravity, layout_gravity, padding

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