Verisoul provides a native Android SDK that allows you to implement fraud prevention in your Android applications. This guide covers the installation, configuration, and usage of the Verisoul Android SDK.

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Requirements

  • Android 7.0 (API level 24) or higher

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Installation

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Repository Setup

Add the Verisoul repository to your project’s settings.gradle file: 
dependencyResolutionManagement {
    repositories {
        maven { url = uri("https://us-central1-maven.pkg.dev/verisoul/android") }
    }
}

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Add Dependency

Add the Verisoul SDK dependency to your app’s build.gradle file:

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For Groovy DSL

dependencies {
    implementation "ai.verisoul:android:0.4.56"
}

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For Kotlin DSL

dependencies {
    implementation(libs.verisoul.android)
}
If you’re using the Kotlin DSL with a version catalog, add these lines to your libs.versions.toml file: Under the [versions] section: 
verisoul = "0.4.56"
Under the [libraries] section: 
verisoul-android = { group = "ai.verisoul", name = "android", version.ref = "verisoul" }

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Google Play Data Safety

See here for guidance on how to disclose Verisoul when submitting to the Google Play Store.

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Initialization

Initialize the Verisoul SDK in your Application class: 
// In your Application class
class MyApplication : Application() {
    override fun onCreate() {
        super.onCreate()
        
        // Initialize Verisoul
        Verisoul.init(
            this,
            VerisoulEnvironment.Prod, // or Sandbox for testing
            "YOUR_VERISOUL_PROJECT_ID"
        )
    }
}
Don’t forget to register your Application class in the AndroidManifest.xml: 
<manifest>
    <application
        android:name=".MyApplication">
            ...
    </application>
</manifest>
When initialized, the Verisoul library will gather initial device data and generate a session ID that will be uploaded to the Verisoul backend.

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Usage

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Getting the Session ID

Once the minimum amount of data is gathered, the session ID becomes available. The session ID is needed to request a risk assessment from Verisoul’s API. Note that session IDs are short-lived and will expire after 24 hours. 
// Kotlin
Verisoul.getSessionId(
    callback = object : VerisoulSessionCallback {
        override fun onSuccess(sessionId: String) {
            Log.d("Verisoul", "Session ID: $sessionId")

            // Pass sessionId to backend to get a Verisoul decision
        }
        
        override fun onFailure(exception: Exception) {
            Log.e("Verisoul", "Error getting session ID: ${exception.message}")
        }
    }
)

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Providing Touch Events

To gather touch events and compare them to device accelerometer sensor data, you need to provide touch events to Verisoul. Create a BaseActivity class, override the dispatchTouchEvent function, and pass the data to Verisoul: 
open class BaseActivity : AppCompatActivity() {
    override fun dispatchTouchEvent(event: MotionEvent?): Boolean {
        Verisoul.onTouchEvent(event)
        return super.dispatchTouchEvent(event)
    }
    
    // Other common BaseActivity code...
}
Then use this BaseActivity as the base class for your activities: 
class MainActivity : BaseActivity() {
    // Your activity code...
}

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Next Steps