Failed to resolve: support-fragment error when add google architecture component dependency

Question

I want to use Google architecture components in my app, but after updating android studio to version 3.1.1 when I add android.arch.lifecycle:extensions:1.1.1 dependency into app.gradle file, it will show Failed to resolve: support-fragment
My gradle version is 4.4

This is app gardle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "ir.apptori.myapplication"
        minSdkVersion 17
        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'
    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 "android.arch.lifecycle:extensions:1.1.1"
}

Please guid me how to fix it, Thanks

Answer 1

add these two to build.gradle -> repositories

{
mavenCentral()
google() 
}

and add to these are to allprojects

allprojects {
repositories {
mavenCentral()
google()
}
}

Answer 2

i add this line in build.gradle and fixed bug : implementation 'androidx.fragment:fragment:1.2.5'