title: Could not find androidx.navigation:safe-args-gradle-plugin:1.0.0-alpha01
body: <p>I want to use Navigation Architecture Components.</p>
  
  <p>But I got a problem with importing <a href="https://developer.android.com/topic/libraries/architecture/navigation/navigation-implementing#Safe-args" rel="noreferrer">safeargs</a></p>
  
  <p>Sync message:</p>
  
  <blockquote>
    <p>Could not find androidx.navigation:safe-args-gradle-plugin:1.0.0-alpha01. 
    Searched in the following locations:<br>
        <a href="https://dl.google.com/dl/android/maven2/androidx/navigation/safe-args-gradle-plugin/1.0.0-alpha01/safe-args-gradle-plugin-1.0.0-alpha01.pom" rel="noreferrer">https://dl.google.com/dl/android/maven2/androidx/navigation/safe-args-gradle-plugin/1.0.0-alpha01/safe-args-gradle-plugin-1.0.0-alpha01.pom</a><br>
        <a href="https://dl.google.com/dl/android/maven2/androidx/navigation/safe-args-gradle-plugin/1.0.0-alpha01/safe-args-gradle-plugin-1.0.0-alpha01.jar" rel="noreferrer">https://dl.google.com/dl/android/maven2/androidx/navigation/safe-args-gradle-plugin/1.0.0-alpha01/safe-args-gradle-plugin-1.0.0-alpha01.jar</a><br>
        <a href="https://jcenter.bintray.com/androidx/navigation/safe-args-gradle-plugin/1.0.0-alpha01/safe-args-gradle-plugin-1.0.0-alpha01.pom" rel="noreferrer">https://jcenter.bintray.com/androidx/navigation/safe-args-gradle-plugin/1.0.0-alpha01/safe-args-gradle-plugin-1.0.0-alpha01.pom</a><br>
        <a href="https://jcenter.bintray.com/androidx/navigation/safe-args-gradle-plugin/1.0.0-alpha01/safe-args-gradle-plugin-1.0.0-alpha01.jar" rel="noreferrer">https://jcenter.bintray.com/androidx/navigation/safe-args-gradle-plugin/1.0.0-alpha01/safe-args-gradle-plugin-1.0.0-alpha01.jar</a><br>
    Required by:<br>
    project :</p>
  </blockquote>
  
  <p>I followed <a href="https://developer.android.com/topic/libraries/architecture/adding-components" rel="noreferrer">Adding Components to your Project</a> but does not solved my problem.</p>
  
  <p>Project: build.gradle</p>
  
  <pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  buildscript {
  
      repositories {
          google()
          jcenter()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:3.1.2'
          classpath "androidx.navigation:safe-args-gradle-plugin:1.0.0-alpha01"
  
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          google()
          jcenter()
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>
  
  <p>Module: build.gradle</p>
  
  <pre><code>apply plugin: 'com.android.application'
  apply plugin: 'androidx.navigation.safeargs'
  
  android {
      compileSdkVersion 27
      defaultConfig {
          applicationId "com.mangoslab.navigation"
          minSdkVersion 21
          targetSdkVersion 27
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      implementation fileTree(dir: 'libs', include: ['*.jar'])
      implementation 'com.android.support:appcompat-v7:27.1.1'
      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'
  
      def nav_version = "1.0.0-alpha01"
  
      implementation "android.arch.navigation:navigation-fragment:${nav_version}" // use -ktx for Kotlin
      implementation "android.arch.navigation:navigation-ui:${nav_version}" // use -ktx for Kotlin
  
      // optional - Test helpers
      androidTestImplementation "android.arch.navigation:navigation-testing:${nav_version}" // use -ktx for Kotlin
  }
  </code></pre>