Failed to Resolve: Android.Support.Design:28.0.0-Rc02

failed to resolve: android.support.design:28.0.0-rc02

I had the same problem and fixed it by just changing version of everything to 28.0.0-rc01.

appcompat-v7:28.0.0-rc02 doesn't work with design:28.0.0-rc01(should be rc02, but we can't)

I close this ticket, the problem has been solved that Google has updated design library to 28.0.0-rc02 .

Failed to resolve: com.android.support:appcompat-v7:28.0

28.0.0 is the final version of support libraries. Android has migrated to AndroidX. To use the latest android libraries, Migrating to AndroidX

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Edit: Versions 28.0.0-rc02 and 28.0.0 are now available.

I don't see any 28.0 version on Google Maven. Only 28.0.0-alpha1 and 28.0.0-alpha3. Just change it to either of those or how it was previously, i.e., with .+ which just means any version under 28 major release.

For an alpha appcompat release 28.+ makes more sense.

Failed to resolve: com.android.support:support-v4:28.0.0-rc01

Use the same version and the latest stable version for:

implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:design:28.0.0'
implementation 'com.andriod.support:support-v4:28.0.0'

And remove the duplicate (support-v4) one. Update your gradle in your root build.gradle too:

classpath 'com.android.tools.build:gradle:3.2.1'

Could not resolve com.android.support:appcompat-v7:28.0.0

I'm sure other answers are good and working. but mine got solved by set proxy to Freedom of Developers.

This solution is for Persians like me who suffer from strict limitations for Iranians by google.

Now my app gradle look like this:

buildscript {
    repositories {
        maven { url 'https://plugins.gradle.org/m2/'}
    }
    dependencies {
        classpath 'gradle.plugin.com.onesignal:onesignal-gradle-plugin:0.12.1'
    }
}
apply plugin: 'com.onesignal.androidsdk.onesignal-gradle-plugin'

repositories {
    maven { url 'https://maven.google.com' }
}

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    buildToolsVersion '28.0.3'

    defaultConfig {
        applicationId "com.mobaleghan.nasimnoor"
        manifestPlaceholders = [
                onesignal_app_id: 'b1ced87b-48d1-4857-a68b-9c287aa4003f',
                // Project number pulled from dashboard, local value is ignored.
                onesignal_google_project_number: 'REMOTE'
        ]
        minSdkVersion 16
        targetSdkVersion 28
        versionCode 9
        versionName "1.6.4"
        vectorDrawables.useSupportLibrary = true
    }

    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'),
                    'proguard-rules.pro'
        }
        debug {
            debuggable true
        }
    }

    lintOptions {
        abortOnError false
    }
}

dependencies {
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:design:28.0.0'
    implementation 'com.android.support:preference-v7:28.0.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.android.support:support-annotations:28.0.0'
    implementation 'com.android.support:support-v4:28.0.0'
    implementation 'com.android.support:cardview-v7:28.0.0'
    implementation 'com.google.android.apps.dashclock:dashclock-api:2.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation "com.android.support:support-core-utils:28.0.0"
    implementation 'com.onesignal:OneSignal:3.10.3'
}

Those repositories are there based on OneSignal documentations.

And top level build:

buildscript {
    repositories {
        google()
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'

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

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
    }
}

And everything is working fine.

Android: Failed to resolve: com.android.support:appcompat-v7:28.1.1

Replace

implementation 'com.android.support:appcompat-v7:28.1.1

with

implementation 'com.android.support:appcompat-v7:28.0.0-rc01'

Currently, the most recent available release for appCompat is 28.0.0-rc01, you are trying to pull an unavailable version of appcompat library.

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