Upgrading the SDK

Version 28.x Upgrade

This document is for developers who have previously integrated v26.x or v27.x of the Skillz SDK. To integrate for the first time, please follow the standard instructions.

Unity

Before You Upgrade

The Skillz SDK is now integrated using CocoaPods for iOS. This dependency manager greatly streamlines integration and configuration of the Skillz SDK. Go here for more information

User Permissions Note

Due to Android being built with Android SDK 30, your app will ask for permissions at runtime, rather than at install time. Unity typically operates by asking for all possible permissions on the first launch of your app, and this can be overwhelming/off-putting to your users. Refer to these instructions on how to prompt for only necessary permissions at runtime.

Instructions

tip

As a best practice back up your existing project prior to upgrading. The upgrade steps require you to delete existing files and directories.

Delete the Assets/Skillz folder in Unity

Make sure to save any custom code you wrote in these Skillz files for safe keeping. In your Unity project, delete the Assets/Skillz/ folder in your Unity project.

Delete the Assets/ExternalDependencyManager folder in Unity

The Google Play Services Resolver has been renamed to the External Dependency Manager for Unity (EDM4U). If you have a PlayServicesResolver and/or ExternalDependencyManager directory in your project you should delete this directory before upgrading and installing the Skillz SDK Unity package.

Import the New Unity Package

With your Unity project open, double-click on the Unity package, skillz_unity-{version}.unitypackage, found inside the downloaded SDK archive. A dialog will pop up with a list of files to import. Make sure all files are checked and click "OK".

Disable Registry Addition

Skillz bundles a plugin by Google called the External Dependency Manager (EDM4U), which is used to resolve Android dependencies. On import of the Skillz SDK, EDM will display a dialog, similar to the screenshot below, to ask if you would like to add additional Unity Package Manager registries. Click the "Disable Registry Addition" button to dismiss the dialog.

Configure Your Game in Skillz Settings

Skillz has a dedicated settings window to configure your game. Access it from the Skillz > Settings menu item:

Enter your game ID, choose either Sandbox or Production for the environment, and your game's orientation for Android.

The orientation setting is for Android only. For games that have mixed orientations, the orientation setting tells Skillz what orientation to set your game scene at when it is loaded at the start of a match. For instance, if the scene for your main menu is designed for Portrait mode, but your game scene is designed for Landscape, the orientation setting should be set to Landscape.

Additionally, you can choose if users are allowed to exit the Skillz UI via its sidebar menu.

Configure iOS Resolver Settings

Enter the External Dependency Manager's iOS Resolver settings by clicking `Assets > External Dependency Manager > iOS Resolver > Settings. Verify the settings are set like this:

Install CocoaPods

The External Dependency Manager can install CocoaPods for you, if it is not already installed:

1. Select Assets > External Dependency Manager > iOS Resolver > Install Cocoapods
2. Click OK in the pop-up confirming installation was successful.

Test Your Game's Workflow

Test your game's workflow with Skillz using the SDK's Unity Companion feature.

Build Your Game

Follow the instructions on how to export and build your game for iOS or Android.

iOS

Instructions

Re-Add Skillz.framework

Please download the newest Skillz.framework from the Skillz Developer Console. Next, remove the older version of Skillz.framework from your project. Now, add the Skillz.framework file that was downloaded to your Xcode project. Refer to this article for more information.

Update the Deployment Target

Now, update the deployment target to iOS 12.0.

Android

Instructions

Add a Skillz SDK Dependency

Point your app to the Skillz SDK version 28.x. In your build.gradle file, update your Skillz dependency to the latest SDK version. For example:

build.gradle

android {
    dependencies {
        implementation 'com.skillz.sdk:skillz-sdk-android:28.0.17'
    }
}

Reference Gradle 5.1+

If you plan on using Google's Maven repository, Gradle version 5.1 and above is required. As such, you will need to modify our build.gradle file to reference v3.5.2 (or above) of the Gradle plugin. It usually resides in the buildscript section:

build.gradle

buildscript {
    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.2'
    }
}

Refer to the official documentation to see which version of the plugin to reference for a different version of Gradle.

Change minSdkVersion, targetSdkVersion, and compileSdkVersion

You will need to modify your build.gradle file so that the minSdkVersion is 24, and both targetSdkVersion and compileSdkVersion are set to 30:

build.gradle

android {
    compileSdkVersion 30
    defaultConfig {
        minSdkVersion 24
        targetSdkVersion 30
    }
}

Update multidex-keep.txt

The Skillz SDK needs a few classes to end up in your APK's main DEX file upon compilation. Modify build.gradle to reference a file called multidex-keep.txt inside the defaultConfig subsection for the android section.

build.gradle

android {
    defaultConfig {
        multiDexKeepProguard file('multidex-keep.txt')
    }
}

Now, update the multidex-keep.txt in your Android Studio project with the contents below:

multidex-keep.txt

-keep class com.google.firebase.crashlytics.** { *; }
-keep class timber.log.** { *; }
-keep class com.facebook.FacebookSdk
-keep class com.path.android.jobqueue.JobManager

Enable AndroidX and R8

The Skillz SDK depends on the AndroidX Support Libraries instead of the original Android Support Libraries. Additionally, R8 has replaced Proguard as the standard tool for code shrinking, desugaring, and obfuscation.

In your project, add the lines below to the gradle.properties file; create one if it does not exist. These will tell Android Studio to automatically migrate dependencies from any original Support Libraries to their AndroidX equivalents, and enable R8.

gradle.properties

android.useAndroidX=true
android.enableJetifier=true
android.enableR8=true

Update Proguard rules

Skillz is now obfuscated and requires updated Proguard rules to prevent it from being re-obfuscated and shrunken. Otherwise, this will cause crashes and other problems at runtime. In your build.gradle, make sure minifyEnabled and shrinkResources are both set to false. Additionally, specify 'proguard-rules.pro' as your Proguard file.

build.gradle

android {
    buildTypes {
        debug {
            jniDebuggable true
            minifyEnabled false
            shrinkResources false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        release {
            minifyEnabled false
            shrinkResources false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

Next, add the snippet below in your Proguard file:

proguard-rules.pro

# The Skillz Android SDK is already obfuscated, prevent it
# from being obfuscated again if minifyEnabled true
-dontobfuscate

# Prevent the Skillz SDK from being minified if minifyEnabled true
-dontshrink

-keep class bitter.jnibridge.* { *; }
-keep class com.unity3d.player.* { *; }
-keep class org.fmod.* { *; }
-keep public class com.dylanvann.fastimage.* { *; }
-keep public class com.dylanvann.fastimage.** { *; }
-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}
-keep class retrofit.** {*;}
-keep class com.facebook.** {*;}
-keep class com.amazonaws.** {*;}

Next Steps

If you encounter any problems, please contact us with a detailed description of the issue you are encountering.