Error:(9, 5) error: resource android:attr/dialogCornerRadius not found

Question

So I installed android studio 3.0.1 and as soon as it opened the gradle built and showed the following errors. I tried adding dependencies such as design and support but in

Answer 1

try to change the compileSdkVersion to: compileSdkVersion 28

Answer 2

in my case, I try tried File>Invalidate Cache/Restart and that works for me.

Answer 3

 buildscript {

    project.ext {
        supportLibVersion = '27.1.1'
        compileVersion = 28
        minSupportedVersion = 22
    }
}

and set dependencies:

implementation "com.android.support:appcompat-v7:$project.supportLibVersion"

Answer 4

Had the same issue while working on an application with several modules, check to make sure as you increase the compileSdkVersion and targetSdkVersion to 28+ values in a module you also do for the others.

A module was running on compileSdkVersion 29 and targetSdkVersion 29 while a second module of the application was running on compileSdkVersion 27 and targetSdkVersion 27.

Changing the second module to also compile for and target SDK version 29 resolved my issue. Hope this helps someone.

Answer 5

I was having the same issue while adding a mapbox navigation API and resolved this issue by going to: file>project Structure and then setting the compile sdk version and build tool version to the latest. And here is the screenshot:

Hope it helps.

Answer 6

The dependencies must be applied as shown below to solve this issue :

dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
implementation 'com.android.support:support-v4:27.1.0'
implementation 'com.android.support:appcompat-v7:27.1.0'
implementation 'com.android.support:recyclerview-v7:27.1.0'
}

Please do not use the version of :

v7:28.0.0-alpha1