Migration to AndroidX

android/app/build.gradle

@@ -12,7 +12,7 @@ android {
         targetSdkVersion 28
         versionCode 1
         versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
         release {
@@ -25,9 +25,9 @@ android {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation 'com.android.support:appcompat-v7:28.0.0'
-    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     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'
+    androidTestImplementation 'androidx.test:runner:1.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
 }

android/app/src/androidTest/java/com/example/android/ExampleInstrumentedTest.kt

@@ -1,13 +1,12 @@
 package com.example.android
 
-import android.support.test.InstrumentationRegistry
-import android.support.test.runner.AndroidJUnit4
-
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.runner.AndroidJUnit4
+import org.junit.Assert.assertEquals
 import org.junit.Test
 import org.junit.runner.RunWith
 
-import org.junit.Assert.*
-
 /**
  * Instrumented test, which will execute on an Android device.
  *
@@ -18,7 +17,7 @@ class ExampleInstrumentedTest {
     @Test
     fun useAppContext() {
         // Context of the app under test.
-        val appContext = InstrumentationRegistry.getTargetContext()
+        val appContext = InstrumentationRegistry.getInstrumentation().context
         assertEquals("example.com.android", appContext.packageName)
     }
 }

android/app/src/main/java/com/example/android/MainActivity.kt

@@ -1,6 +1,6 @@
 package com.example.android
 
-import android.support.v7.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 import android.util.Log
 

android/app/src/main/res/layout/activity_main.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout
+<androidx.constraintlayout.widget.ConstraintLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:tools="http://schemas.android.com/tools"
         xmlns:app="http://schemas.android.com/apk/res-auto"
@@ -16,4 +16,4 @@
             app:layout_constraintRight_toRightOf="parent"
             app:layout_constraintTop_toTopOf="parent"/>
 
-</android.support.constraint.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

android/gradle.properties

@@ -13,3 +13,5 @@ org.gradle.jvmargs=-Xmx1536m
 # org.gradle.parallel=true
 # Kotlin code style for this project: "official" or "obsolete":
 kotlin.code.style=official
+android.useAndroidX=true
+android.enableJetifier=true