Set Up Your Client

important
The SSL certificates for all Braintree SDKs are set to expire by June 30, 2025. This will impact existing versions of the SDK in published versions of your app. To reduce the impact, upgrade the Android SDK to version 4.45.0+ or version 5.0.0+ for the new SSL certifications.
If you do not decommission your app versions that include the older SDK versions or force upgrade your app with the updated certificates by the expiration date, 100% of your customer traffic will fail.

Android SDK setup

In your app's build.gradle, add the following:

Kotlin

Groovy

dependencies {
    implementation("com.braintreepayments.api:drop-in:6.13.0")
}

For other installation techniques and notes, see the Android Client SDK Guide.

Get a client token

Client tokens are optional: You can initialize Braintree with a tokenization key instead of a client token. If you are using a tokenization key, you may skip this section and use the tokenization key for your authorization instead.

Your server is responsible for generating a client token, which contains the authorization and configuration details that your client needs to initialize the client SDK.

Initialize Braintree with a ClientTokenProvider to asychronously fetch a client token on your behalf when it is needed in the SDK.

Try it now

So you can jump right in we generated a tokenization key for you. This is for testing purposes only! When you're ready to build your own integration, use your own tokenization key or generate your own client token.

Java

Kotlin

public class MyActivity extends AppCompatActivity implements DropInListener {

  private DropInClient dropInClient;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    dropInClient = new DropInClient(this, dropInRequest, "sandbox_f252zhq7_hh4cpc39zq4rgjcg");
    dropInClient.setListener(this);
  }
}

Present Drop-in UI

At this point, you are ready to collect payment information from your customer.

Drop-in is the easiest way to get started. It provides a fully fledged payments experience out of the box. You can also choose to create a custom UI and then tokenize the payment information directly.

Java

Kotlin

public void onBraintreeSubmit(View v) {
  DropInRequest dropInRequest = new DropInRequest();
  dropInClient.launchDropInForResult(this, DROPIN_REQUEST_CODE);
}

To handle the result of the Drop-in flow, implement a DropInListener:

Java

Kotlin

public class MyActivity extends AppCompatActivity implements DropInListener {

  @Override
  public void onDropInSuccess(@NonNull DropInResult dropInResult) {
      // send dropInResult.getPaymentMethodNonce().getString() to server
  }

  @Override
  public void onDropInFailure(@NonNull Exception error) {
    if (error instanceof UserCanceledException) {
      // user canceled
    } else {
      // handle error
    }
  }
}

Test your integration

Create a sandbox account

If you haven't already, sign up for a free Braintree sandbox account:

Sandbox merchant ID
Public key
Private key

Use these credentials for your development and testing.

important
When you go live, you will need to replace your sandbox API credentials with production API credentials.

Test values

When testing in the sandbox, be sure to use our test card numbers (e.g. 4111111111111111) and nonces (e.g. fake-valid-nonce). Real payment method data will not work in the sandbox. See our Testing page for more details.

Send payment method nonce to server

Send the resulting payment method nonce to your server (this example uses Android Async Http Client - adapt to your own setup):

Android

void postNonceToServer(String nonce) {
  AsyncHttpClient client = new AsyncHttpClient();
  RequestParams params = new RequestParams();
  params.put("payment_method_nonce", nonce);
  client.post("http://your-server/checkout", params,
    new AsyncHttpResponseHandler() {
      // Your implementation here
    }
  );
}

world.greeted = true

At this point, you should have a working client-side checkout flow. When your user provides payment information, you receive a payment method nonce and send it to your server.

Next, your server closes the loop by using the payment method nonce to create a transaction.

Next Page: Simple Server →