Dependencies are up-to-date but Gradle thinks not

Question

Why does Gradle give this error about dependencies when I have used the latest and same version? This has only just started today and I'm lost as to how to fix this:

All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 28.0.0, 26.1.0. Examples include com.android.support:animated-vector-drawable:28.0.0 and com.android.support:support-media-compat:26.1.0

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:animated-vector-drawable-v7:28.0.0'
    implementation 'com.android.support:support-media-compat-v7:28.0.0'
    implementation 'com.android.support:cardview-v7:28.0.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.google.android.gms:play-services-maps:15.0.1'
}

ʍѳђઽ૯ท's suggestion

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':app'.
> Could not generate a proxy class for class com.android.build.gradle.tasks.BuildArtifactReportTask.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 2s

Answer 1

Maybe this is because support library version 28 hasn't any library that call it

implementation 'com.android.support:animated-vector-drawable-v7:28.0.0'

or

implementation 'com.android.support:support-media-compat-v7:28.0.0'

Or Maybe this is because you are using support library version 28, but targetSdkVersion is lower than version 28.

(in Android Studio v:3.1.4)If you would like to add another library to your project, use the following URL

(from toolbar) file \ Project Structure ... \ (from left window : under modules) app \ Dependencies \ (use green plus)

This work for me : Add this lines in build.gradle (Project Gradle)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "your project"
        minSdkVersion 14
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    buildToolsVersion '28.0.3'
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'junit:junit:4.12'
    implementation 'com.android.support:support-v13:28.0.0'
    implementation 'com.android.support:support-v4:28.0.0'
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.android.support.test.espresso:espresso-contrib:3.0.2'
    implementation 'com.google.android.gms:play-services-maps:15.0.1'
    implementation 'com.android.support:cardview-v7:28.0.0'
    implementation 'com.android.support:mediarouter-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:2.0.0-alpha2'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.android.support:support-annotations:28.0.0'
    implementation 'com.android.support:design:28.0.0'
}