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OverviewUpgrade your integration
Online payments
OverviewFind your use caseManaged Payments
Payment methods
Payment interfaces
Payment scenarios
In-person payments
Terminal
Other Stripe products

Set up your integration

Set up a Stripe Terminal SDK or server-driven integration to accept in-person payments.

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Getting started with the Android SDK requires four steps:

  1. Install the SDK in your app.
  2. Configure your app.
  3. Set up the connection token endpoint in your app and backend.
  4. Initialize the SDK in your app.

Install the SDK
Client-side

Caution

The SDK is no longer compatible with the support libraries, as we use Room to store and maintain state across the app lifecycle. Make sure your app has migrated to AndroidX.

To install the SDK, add stripeterminal to the dependencies block of your app’s build file:

build.gradle.kts
plugins {
  id("com.android.application")
}

android { ... }

dependencies {
  implementation("com.stripe:stripeterminal:4.4.0")
  // ...
}

Next, since the SDK relies on Java 8, your app’s build file needs to specify that as your target Java version:

build.gradle.kts
android {
  // ...
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

Note

For details on the latest SDK release and past versions, see the Releases page on GitHub. To receive notifications when a new release is published, watch releases for the repository.

For information on migrating from earlier beta versions of the Android SDK, see the Stripe Terminal Beta Migration Guide.

Configure your app
Client-side

You must enable the ACCESS_FINE_LOCATION permission. To connect a Bluetooth reader, you must also enable Bluetooth permissions. Add the appropriate permissions to your manifest as shown here:

AndroidManifest.xml
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />

Before initializing the Terminal object, add the following check to make sure that the ACCESS_FINE_LOCATION permission is enabled in your app:

MainActivity.kt
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)
}

Also verify that the app user grants location permission—the SDK doesn’t function without it. To do this, override the onRequestPermissionsResult method in your app and check the permission result.

MainActivity.kt
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.")
    }
}

Note

To reduce fraud risks associated with payments, and to minimize disputes, Stripe needs to know where payments occur. If the SDK can’t determine the location of the Android device, payments are disabled until location access is restored.

Set up the ConnectionToken endpoint
Server-side
Client-side

Server-side

To connect to a reader, your backend needs to give the SDK permission to use the reader with your Stripe account, by providing it with the secret from a ConnectionToken. Your backend needs to only create connection tokens for clients that it trusts.

Command Line
curl https://api.stripe.com/v1/terminal/connection_tokens \
  -u 
sk_test_BQokikJOvBiI2HlWgH4olfQ2
: \
  -X "POST"

Obtain the secret from the ConnectionToken on your server and pass it to the client side.

post '/connection_token' do
  token = # ... Create or retrieve the ConnectionToken
  {secret: token.secret}.to_json
end

Caution

The secret from the ConnectionToken lets you connect to any Stripe Terminal reader and take payments with your Stripe account. Be sure to authenticate the endpoint for creating connection tokens and protect it from cross-site request forgery (CSRF).

Client-side

To give the SDK access to this endpoint, implement the ConnectionTokenProvider interface in your app, which defines a single function that requests a ConnectionToken from your backend.

CustomConnectionTokenProvider.kt
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)
            )
        }
    }
}

This function is called whenever the SDK needs to authenticate with Stripe or the Reader. It’s also called when a new connection token is needed to connect to a reader (for example, when your app disconnects from a reader). If the SDK can’t retrieve a new connection token from your backend, connecting to a reader fails with the error from your server.

Caution

Do not cache or hardcode the connection token. The SDK manages the connection token’s lifecycle.

Certificate pinning

In most cases, you shouldn’t configure your application with certificate pinning. If your application does require it, see the certificate pinning docs.

Initialize the SDK
Client-side

The Android SDK is lifecycle aware. To prevent memory leaks and ensure proper cleanup of long-running Terminal SDK processes, your application must implement an Application subclass that uses TerminalApplicationDelegate.onCreate() to inform the SDK about lifecycle events.

StripeTerminalApplication.kt
// 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)
    }
}

Note

If you want to use Tap to Pay on Android (TTPA), the initialization in Application is slightly different from this example. See Connect to a reader with TTPA.

The Terminal class made available by the Stripe Terminal SDK exposes a generic interface for discovering readers, connecting to a reader, and performing operations on the reader, such as displaying cart details, collecting payments, and saving cards for future use.

To get started, provide the current application context, the ConnectionTokenProvider implemented in Step 3, and a TerminalListener object. You can use this listener to handle events such as payment and connection status updates from the SDK.

MainActivity.kt
// 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()

Caution

If you’re upgrading from a version below 1.0.0-rc2, note that TerminalLifecycleObserver and Application classes are now mandatory.

SDK updates

Stripe periodically releases updates which can include new functionality, bug fixes, and security updates. Update your SDK as soon as a new version is available. The currently available SDKs are:

Next steps

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