androidandroid-layoutandroid-studioandroid-xmlandroid-layoutparams

Reputation: 2370

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

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()
    }
}

Upvotes: 90

Answers (16)

aamitarya

Reputation: 739

If you're facing this issue only for a few of the attributes like android:text or android:layout_margin, etc, check if your compileSdkVersion is 33 in gradle, and try downgrading it to 32 in build.gradle(:app)

Upvotes: 2

Abdullah Morsi

Reputation: 49

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

Upvotes: 1

Steven de Jong

Reputation: 199

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

Upvotes: 1

Tal Fiskus

Reputation: 131

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

Upvotes: 0

Mohamed Akl

Reputation: 652

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

Upvotes: 51

Racer

Reputation: 152

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)

Upvotes: 6

Mohad Hadi

Reputation: 1986

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

Upvotes: 3

Ashik Azeez

Reputation: 444

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

Upvotes: 0

Sami Rajala

Reputation: 191

I had to

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

Upvotes: 1

Henrik Bøgelund Lavstsen

Reputation: 1633

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.

Upvotes: 6

Hulu

Reputation: 11

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

Upvotes: 1

Mazen Alsenih

Reputation: 101

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.

Upvotes: 2