Set up your integration

if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
    val permissions = arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION)
    ActivityCompat.requestPermissions(this, permissions, REQUEST_CODE_LOCATION)
}

override fun onRequestPermissionsResult(
    requestCode: Int,
    permissions: Array<String>,
    grantResults: IntArray
) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults)

    if (requestCode == REQUEST_CODE_LOCATION && grantResults.isNotEmpty()
        && grantResults[0] != PackageManager.PERMISSION_GRANTED
    ) {
        throw RuntimeException("Location services are required to connect to a reader.")
    }
}

class CustomConnectionTokenProvider : ConnectionTokenProvider {
    override fun fetchConnectionToken(callback: ConnectionTokenCallback) {
        try {
            // Your backend should call /v1/terminal/connection_tokens and return the
            // JSON response from Stripe. When the request to your backend succeeds,
            // return the `secret` from the response to the SDK.
            callback.onSuccess(secret)
        } catch (e: Exception) {
            callback.onFailure(
                ConnectionTokenException("Failed to fetch connection token", e)
            )
        }
    }
}

// Substitute with your application name, and remember to keep it the same as your AndroidManifest.xml
class StripeTerminalApplication : Application() {
    override fun onCreate() {
        super.onCreate()
        TerminalApplicationDelegate.onCreate(this)
    }
}

// Create your listener object. Override any methods that you want to be notified about
val listener = object : TerminalListener {
    override fun onConnectionStatusChange(status: ConnectionStatus) {
        println("onConnectionStatusChange: $status");
    }

    override fun onPaymentStatusChange(status: PaymentStatus) {
        println("onPaymentStatusChange: $status");
    }
}

// Choose the level of messages that should be logged to your console
val logLevel = LogLevel.VERBOSE

// Create your token provider.
val tokenProvider = CustomConnectionTokenProvider()

// Pass in the current application context, your desired logging level, your token provider, and the listener you created
if (!Terminal.isInitialized()) {
    Terminal.initTerminal(applicationContext, logLevel, tokenProvider, listener)
}

// Since the Terminal is a singleton, you can call getInstance whenever you need it
Terminal.getInstance()