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

Question

There are many different questions about this, but the problems there are about using v7.28.0, v7.28.+, v7.28.0.0-rc02 But when I sync my project I get this error:

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.0.0.

I've checked Support library setup and followed it's instructions but it didn't help.

This is my module app

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 8
        versionName "1.6.3"
        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:27.1.1'
    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:1.1.0'
    implementation "com.android.support:support-core-utils:28.0.0"
    implementation 'com.onesignal:OneSignal:3.10.3'
}

and project gradle:

buildscript {
    repositories {
        google()
        jcenter()
    }
    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()
    }
}

The android studio internet connection is fine as I've tested in settings and I don't know where else to look.

I even created a new project in AS 3.2.1 But I get same error. I don't know why this happens every time I update AS!

Answer 1

我敢肯定，其他答案也不错并且可以正常工作。但是我却被集结到开发者自由的解决。

此解决方案适用于像我这样的波斯人，他们受到Google对伊朗人的严格限制。

现在我的应用程序gradle看起来像这样：

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'
}

这些存储库基于OneSignal文档。

和顶级构建：

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'
        }
    }
}

而且一切正常。