change version of compileSdkVersion,buildToolsVersion to 28.

app/build.gradle

@@ -1,17 +1,17 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 27
-    buildToolsVersion '26.0.3'
+    compileSdkVersion 28
+    buildToolsVersion '28.0.3'
 
     defaultConfig {
         applicationId "com.google.android.perftesting"
         minSdkVersion 14
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
 
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         testHandleProfiling true
         testFunctionalTest true
     }
@@ -32,20 +32,20 @@ android {
 }
 
 dependencies {
-    String supportLibVersion = "27.0.2"
-    compile fileTree(include: ['*.jar'], dir: 'libs')
-    compile "com.android.support:appcompat-v7:${supportLibVersion}"
-    compile "com.android.support:recyclerview-v7:${supportLibVersion}"
-    compile "com.android.support:support-v4:${supportLibVersion}"
-    compile 'com.github.bumptech.glide:glide:3.8.0'
-    // TODO(developer): Comment in the following dependencies to enable Espresso and related libraries in this project.
-    // Force the use of a specific version of the annotations library because the app compile
-    // dependencies require this version transitively, but an androidTestCompile dependency
-    // requires a different version. See http://goo.gl/iH4WDq for more info.
-    //     androidTestCompile "com.android.support:support-annotations:${supportLibVersion}"
-    //     androidTestCompile 'com.android.support.test:runner:0.5'
-    //     androidTestCompile 'com.android.support.test:rules:0.5'
-    //     androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    implementation "androidx.appcompat:appcompat:1.0.2"
+    implementation "androidx.recyclerview:recyclerview:1.0.0"
+    implementation "androidx.legacy:legacy-support-v4:1.0.0"
+    implementation 'com.github.bumptech.glide:glide:4.8.0'
+//     TODO(developer): Comment in the following dependencies to enable Espresso and related libraries in this project.
+//     Force the use of a specific version of the annotations library because the app compile
+//     dependencies require this version transitively, but an androidTestCompile dependency
+//     requires a different version. See http://goo.gl/iH4WDq for more info.
+
+    androidTestImplementation "androidx.annotation:annotation:1.0.0"
+    androidTestImplementation 'androidx.test:runner:1.1.0'
+    androidTestImplementation 'androidx.test:rules:1.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
 }
 
 // Create performance testing tasks for all connected Android devices using a Gradle plugin defined

app/src/androidTest/java/com/google/android/perftesting/TestListener.java

@@ -17,7 +17,7 @@
 package com.google.android.perftesting;
 
 import android.content.Context;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
 import android.util.Log;
 
 import com.google.android.perftesting.common.PerfTestingUtils;

app/src/main/java/com/google/android/perftesting/MainActivity.java

@@ -18,7 +18,7 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.view.View;
 
 public class MainActivity extends AppCompatActivity {

app/src/main/java/com/google/android/perftesting/MainActivityFragment.java

@@ -17,7 +17,7 @@
 package com.google.android.perftesting;
 
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/com/google/android/perftesting/RecyclerViewActivity.java

@@ -17,9 +17,9 @@
 package com.google.android.perftesting;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
 
 import com.google.android.perftesting.contacts.Contact;
 import com.google.android.perftesting.contacts.ContactsRecyclerAdapter;

app/src/main/java/com/google/android/perftesting/SimpleListActivity.java

@@ -17,7 +17,7 @@
 package com.google.android.perftesting;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.widget.ListView;
 
 import com.google.android.perftesting.contacts.Contact;

app/src/main/java/com/google/android/perftesting/contacts/ContactsArrayAdapterFixed.java

@@ -24,6 +24,7 @@
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import com.bumptech.glide.request.RequestOptions;
 import com.google.android.perftesting.R;
 
 import com.bumptech.glide.Glide;
@@ -41,8 +42,8 @@ public ContactsArrayAdapterFixed(Context context, List<Contact> contacts) {
         super(context, 0, contacts);
     }
 
-    @ Override
-    public View getView(int position, View convertView, ViewGroup parent ) {
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
 
         Contact contact = getItem(position);
         LayoutInflater inflater = LayoutInflater.from(getContext());
@@ -56,7 +57,8 @@ public View getView(int position, View convertView, ViewGroup parent ) {
 
         Glide.with(contactImage.getContext())
                 .load(R.drawable.bbq)
-                .fitCenter()
+                .apply(new RequestOptions()
+                        .fitCenter())
                 .into(contactImage);
 
         contactName.setText(contact.getName());

app/src/main/java/com/google/android/perftesting/contacts/ContactsRecyclerAdapter.java

@@ -17,13 +17,14 @@
 package com.google.android.perftesting.contacts;
 
 import android.content.Context;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import com.bumptech.glide.request.RequestOptions;
 import com.google.android.perftesting.R;
 
 import com.bumptech.glide.Glide;
@@ -63,7 +64,8 @@ public void onBindViewHolder(ViewHolder holder, int position) {
         textView.setText(contact.getName());
         Glide.with(contactPic.getContext())
                 .load(R.drawable.bbq)
-                .fitCenter()
+                .apply(new RequestOptions()
+                        .fitCenter())
                 .into(contactPic);
     }
 

app/src/main/res/layout/activity_recyclerview.xml

@@ -17,7 +17,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     tools:context=".RecyclerViewActivity">
 
-    <android.support.v7.widget.RecyclerView
+    <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/contactList"
         android:layout_width="match_parent"
         android:layout_height="match_parent"/>

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.4.0-alpha05'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Fri Jan 19 15:00:17 WET 2018
+#Tue Nov 27 12:59:21 EET 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.0-rc-1-all.zip