Android SDK

This document explains how to use the GAMEPOT Android SDK to develop games for Android. By installing the SDK and configuring the environment, you can integrate the game with the dashboard.

System Requirements

The system requirements for using the GAMEPOT Android SDK are as follows:

• Minimum Requirements: Android Level 24 or higher (If you need support for lower versions of Android, please contact [e-mail].)

SDK Installation and Environment Configuration

After installing the Android SDK, you can configure the environment to integrate the GAMEPOT dashboard with your game and use the necessary features for game development.

The GAMEPOT SDK supports the following languages:

• Korean, English, Italian, Thai, Vietnamese, Japanese, Chinese (Simplified/Traditional), Indonesian, German, Spanish, French.

When running the app, the SDK will display the supported language based on the device’s language settings. If a language is not supported, it will default to English.

SDK Installation

To install the GAMEPOT Android SDK and set up the project, follow these steps:

1. Log in to the dashboard with an administrator account.

2. Add the Nbase SDK to the bundle.gradle or bundle.gradle.kts file.

3. Starting from GAMEPOT 3.0, external libraries can be easily integrated through Gradle settings.

Kotlin Gradle Configuration

1. Add the following definition to the settings.gradle.kts file of the project.

dependencyResolutionManagement {
    repositories {
        ...
        google()
        // nbase repo
        maven(url = "https://repo.nbase.io/repository/nbase-releases")
    }
}

1. Add SDK dependencies to the build.gradle.kts file of the project (Module: app).

dependencies {
...
    implementation("com.google.code.gson:gson:2.10")
    implementation("androidx.security:security-crypto:1.0.0")
    implementation("com.apollographql.apollo3:apollo-runtime:4.0.0-beta.4")
    implementation("io.socket:socket.io-client:2.1.0")
    implementation("io.nbase:nbasesdk:3.0.78")
}

Example: If using Google login and Google Play Store payment.

 dependencies {
...
    implementation("com.google.code.gson:gson:2.10")
    implementation("androidx.security:security-crypto:1.0.0")
    implementation("com.apollographql.apollo3:apollo-runtime:4.0.0-beta.4")
    implementation("io.socket:socket.io-client:2.1.0")
    implementation("io.nbase:nbasesdk:3.0.78")
    implementation("io.nbase:nbase-adapter-provider-google:3.0.4")
    implementation("io.nbase:nbase-adapter-billing-googleplay:3.0.3")
    implementation("com.google.android.gms:play-services-auth:20.7.0")
    implementation("com.android.billingclient:billing-ktx:6.1.0")
}

Java Gradle Configuration

1. Add the definition to the build.gradle file of the project (Module: project).

allprojects {
    repositories {
        ...
        google()
        // nbase repo
        maven { url "https://repo.nbase.io/repository/nbase-releases" }
    }
}

2. 프로젝트에 (Module : app)의 build.gradle 파일에 SDK 종속성을 추가합니다.
```Groovy
dependencies {
...
    implementation("com.google.code.gson:gson:2.10")
    implementation("androidx.security:security-crypto:1.0.0")
    implementation("com.apollographql.apollo3:apollo-runtime:4.0.0-beta.4")
    implementation("io.socket:socket.io-client:2.1.0")
    implementation("io.nbase:nbasesdk:3.0.78")
}

Example: If using Google login and Google Play Store payment.

 dependencies {
...
    implementation("com.google.code.gson:gson:2.10")
    implementation("androidx.security:security-crypto:1.0.0")
    implementation("com.apollographql.apollo3:apollo-runtime:4.0.0-beta.4")
    implementation("io.socket:socket.io-client:2.1.0")
    implementation("io.nbase:nbasesdk:3.0.78")
    implementation("io.nbase:nbase-adapter-provider-google:3.0.4")
    implementation("io.nbase:nbase-adapter-billing-googleplay:3.0.3")
    implementation("com.google.android.gms:play-services-auth:20.7.0")
    implementation("com.android.billingclient:billing-ktx:6.1.0")
}

Library List

Name	Version	Type	Dependeny modules
io.nbase:nbasesdk	3.0.78	GAMEPOT Base Module	X
io.nbase:nbase-adapter-provider-google	3.0.4	Google Login	com.google.android.gms:play-services-auth:20.7.0
io.nbase:nbase-adapter-provider-apple	3.0.3	Apple Login
io.nbase:nbase-adapter-provider-facebook	3.0.2	Facebook Login	com.facebook.android:facebook-login:latest.release
io.nbase:nbase-adapter-provider-naver	3.0.1	NAVER Login
io.nbase:nbase-adapter-provider-line	3.0.1	Line Login
io.nbase:nbase-adapter-provider-x	3.0.1	X Login
io.nbase:nbase-adapter-billing-googleplay	3.0.3	Google Store	com.android.billingclient:billing-ktx:6.1.0
io.nbase:nbase-adapter-billing-one	3.0.1	ONEStore
io.nbase:nbase-adapter-billing-galaxy	3.0.1	Galaxy Store
io.nbase:nbase-adapter-billing-amazon	3.0.1	Amazon Store

Email and guest login are applied to the base module.

Preparation Steps

1. You can copy the Project ID and Project Key from the Dashboard → Project Settings.

2. Environment settings for login, store, and integration can all be added/modified from the Dashboard → Project Settings.

3. For each login method, refer to the [Login Authentication Settings], configure it in the console, and add it to the dashboard.

4. For in-app payments, refer to the [Store Settings], configure it in the console, and add it to the dashboard.

5. Please register items for each store for in-app payments. Add them in the Dashboard → Payment → In-App section.

Initialization

To initialize, add the following code to the object used in the first scene that loads when the game starts.

Kotlin

import com.nbase.sdk.NBase
import com.nbase.sdk.Store

 NBase.initialize(activity, projectId, projectKey, [StoreId], [language], [region]) { init, e ->
    if (e != null) {
        Log.e("NBase", e.message)
    } else {
        Log.e("NBase", init)
    }
}

Java

import com.nbase.sdk.NBase;
import com.nbase.sdk.Store;

NBase nBase = NBase.INSTANCE;
nBase.initialize(activity, projectId, projectKey, Store.GOOGLE, language, region, (init, e) -> {
    if (e != null) {
        Log.e("NBase", "initialize fail: " + e.getMessage());
    } else {
        Log.e("NBase", "initialize success: " + init.toString());
    }
    return null;
});

• Parameter

Key	Description	Required
projectId	Dashboard → Project Settings	O
projectKey	Dashboard → Project Settings	O
storeId	Refer to the table below	O
language	Language (en,ko,jp...)	O
region	Region (kr, jp, sg, us, eu, preview)	O

Key	Description
Store.GOOGLE.ToString()	Google Store
Store.ONE.ToString()	ONEStore
Store.GALAXY.ToString()	Galaxy Store
Store.AMAZON.ToString()	Amazon Store
Store.HUAWEI.ToString()	Huawei Store

• Callback

Key	Type	Description
status	Boolean	Status
language	String	Language
country	String	Country
remote_ip	String	IP
platform	String	Platform
sandbox	Boolean	Sandbox Mode

Login

To use the SDK login functionality that is triggered when the login button is clicked, depending on the login UI implemented by the developer, please use the following code.

Kotlin

import com.nbase.sdk.Provider

NBase.signIn(activity, Provider.GOOGLE.toString()) { user, e -> 
    if (e != null) {
        Log.e("NBase", e.message)
    } else {
        Log.e("NBase", user)
    }
}

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)
    NBase.onActivityResult(requestCode, resultCode, data)
}

Java

import com.nbase.sdk.Provider;

NBase nBase = NBase.INSTANCE;
nBase.signIn(activity, Provider.GOOGLE.toString(), (user, e) -> {
    if (e != null) {
        Log.e("NBase", "signIn fail: " + e.getMessage());
    } else {
        Log.e("NBase", "signIn success: " + user.toString());
    }
    return null;
});

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    nBase.onActivityResult(requestCode, resultCode, data);
}

• Parameter

Key	Description
Provider.GOOGLE.ToString()	Google
Provider.ANONYMOUS.ToString()	Guest
Provider.FACEBOOK.ToString()	Facebook
Provider.APPLE.ToString()	Apple
Provider.KAKAO.ToString()	Kakao
Provider.PLAYGAME.ToString()	Play Game
Provider.STEAM.ToString()	Steam
Provider.X.ToString()	X
Provider.LINE.ToString()	Line
Provider.NAVER.ToString()	NAVER
Provider.GITHUB.ToString()	Github
Provider.MICROSOFT.ToString()	Microsoft
Provider.HUAWEI.ToString()	Huawei

• Callback

Key	Type	Description
id	String	User ID
socialId	String	Social ID
name	String	Name
nickname	String	Nickname
email	String	Email
token	String	Token
age	Int	Age
birth	String	Date of Birth
sex	String	Gender
profile	String	Profile URL
mobile	String	Phone Number
customField	String	Custom Field

Automatic Login (Optional)

After initialization, the system attempts automatic login using the last authentication method the user logged in with.

Kotlin

NBase.signInLastLoggedIn(activity) { user, e ->
    if (e != null) {
        Log.e("NBase", e.message)
    } else {
        Log.e("NBase", user)
    }
}

Java

NBase nBase = NBase.INSTANCE;
nBase.signInLastLoggedIn(activity, (user, e) -> {
    if (e != null) {
        Log.e("NBase", "signInLastLoggedIn fail: " + e.getMessage());
    } else {
        Log.e("NBase", "signInLastLoggedIn success: " + user.toString());
    }
    return null;
});

Self-ID and Password Authentication (Optional)

This authentication method allows users to log in using their email address and password. It performs user authentication based on the user's email address and password. This feature plays an important role in traditional email/password-based authentication systems.

Kotlin

NBase.signInWithPassword(activity, username, password) { user, e ->
    if (e != null) {
        Log.e("NBase", e.message)
    } else {
        Log.e("NBase", user)
    }
}

Java

NBase nBase = NBase.INSTANCE;
nBase.signInWithPassword(activity, username, password, (user, e) -> {
    if (e != null) {
        Log.e("NBase", "signInWithPassword fail: " + e.getMessage());
    } else {
        Log.e("NBase", "signInWithPassword success: " + user.toString());
    }
    return null;
});

Login with Credentials (Optional)

This feature is used to handle user login using authentication credentials obtained through various methods (such as email and password, social media accounts, phone numbers, etc.). It facilitates the implementation of diverse authentication methods and enables login to Gamepot.

Kotlin

NBase.signInWithCredential(activity, Provider.GOOGLE.ToString(), providerToken) { user, e ->
    if (e != null) {
        Log.e("NBase", e.message)
    } else {
        Log.e("NBase", user)
    }
}

Java

NBase nBase = NBase.INSTANCE;
nBase.signInWithCredential(activity, Provider.GOOGLE.toString(), providerToken, (user, e) -> {
    if (e != null) {
        Log.e("NBase", "signInWithCredential fail: " + e.getMessage());
    } else {
        Log.e("NBase", "signInWithCredential success: " + user.toString());
    }
    return null;
});

Logout

To use the SDK logout function, please use the code below.

Kotlin

NBase.signOut() { status, e ->
    if (e != null) {
        Log.e("NBase", e.message)
    } else {
        Log.e("NBase", status)
    }
}

Java

NBase nBase = NBase.INSTANCE;
nBase.signOut((status, e) -> {
    if (e != null) {
        Log.e("NBase", "signOut fail: " + e.getMessage());
    } else {
        Log.e("NBase", "signOut success: " + status);
    }
    return null;
});

• Callback

Key	Type	Description
status	Boolean	Success Status

Payment

Before making a payment, you must configure the settings for each store according to the store's requirements in the [Store Settings]. Additionally, if items have not been added in the Dashboard → Payment → In-App section, the error 'ProductID not found' will occur.

Fetch In-App Information

When making a payment, you need to display payment information and local currency details on the screen. You can retrieve the current payment currency, name, and other details using the functions below. If the information is not fetched correctly, please check the console settings.

Kotlin

import com.nbase.sdk.Store

NBase.getProductItems() {products, e -> 
    if (e != null) {
        Log.e("NBase", e.message)
    } else {
        // In-app Item Information
        Log.e("NBase", products)
    }
}

Java

NBase nBase = NBase.INSTANCE;
nBase.getProductItems((products, e) -> {
    if (e != null) {
        Log.e("NBase", "getProductItems fail: " + e.getMessage());
    } else {
        if (products != null) {
            Log.e("NBase", "getProductItems success: " + products.toString());
        }
    }
    return null;
});

• Callback

Key	Type	Description
id	String	ID
productName	String	Product Name
price	Float	Product Price
productId	String	Product Unique ID
productType	String	Product Type
productDescription	String	Product Description
currency	String	Currency Unit

Payment Request

You can request a payment using the productId from the fetched in-app information.

Kotlin

import com.nbase.sdk.Store

NBase.purchase(activity, Store.GOOGLE, [productId], [metadata], [options]) { purchase, e -> 
    if (e != null) {
        Log.e("NBase", e.message)
    } else {
        Log.e("NBase", purchase)
    }
}

Java

import com.nbase.sdk.Store;

NBase nBase = NBase.INSTANCE;
nbase.purchase(activity, Store.GOOGLE, productId, metadata, options, (purchase, e) -> {
    if (e != null) {
        Log.e("NBase", "purchase fail: " + e.getMessage());
    } else {
        if (purchase != null) {
            Log.e("NBase", "purchase success: " + purchase.toString());
        }
    }
    return null;
});

• Parameter

Key	Description	Required
ProductId	Product ID (Dashboard → Payment → In-App Items)	O
Metadata	Metadata	X
Options	Payment Option Features	X

Key	Description
Store.GOOGLE.ToString()	Google Store
Store.ONE.ToString()	ONEStore
Store.GALAXY.ToString()	Galaxy Store
Store.AMAZON.ToString()	Amazon Store
Store.HUAWEI.ToString()	Huawei Store

• Callback

Key	Type	Description
id	String	ID
orderId	String	Oder ID
storeId	String	Store ID
productId	String	Product ID
billingKey	String	Billing Key
signature	String	Signature
originalJson	String	Original JSON
developerPayload	String	Developer Payload
packageName	String	Package Name
isAcknowledged	bool	Confirmation Status
purchaseState	String	Purchase Status
purchaseTime	String	Purchase Time
quantity	String	Quantity
recurringState	String	Subscription Status
currency	String	Currency
country	String	Country
paymentId	String	Payment ID
price	Float	Price
iapVersion	String	In-app Billing Version
playerId	String	Player ID
serverId	String	Server ID
level	Int	Level
userdata	String	User Data
metadata	String	Metadata
options	String	Option
authCode	String	Authentication Code

Troubleshooting

Q. An error occurs on Android with the following message:

Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.security.crypto.MasterKeys" on path: DexPathList[[zip file "/data/app/~~KKBtt9efgPjpqDSP6o3P1g==/com.nbase.je_beta-6fz3RrA1gqu27fSFW0ehcQ==/base.apk"],nativeLibraryDirectories=[/data/app/~~KKBtt9efgPjpqDSP6o3P1g==/com.nbase.je_beta-6fz3RrA1gqu27fSFW0ehcQ==/lib/arm64, /system/lib64, /system/system_ext/lib64]]

A. This error occurs because the MasterKeys class cannot be found. You need to add the following code to the build.gradle or build.gradle.kts file.

implementation("androidx.security:security-crypto:1.0.0")

Q. The following error occurs during Google login:

10: Developer console is not set up correctly.

A. You need to verify that the OAuth 2.0 Client ID and Client Secret of the web application registered in the Google Cloud Console are correctly entered in the GAMEPOT dashboard.

Q. The following error occurs during Google login:

16: Cannot find a matching credential.

A. This error can also occur if the package registered in the Google Cloud Console for OAuth 2.0 Android and the app's SHA-1 value do not match.