This is Braintree's v.zero SDK for Android. Integrate this library to accept payments in your Android app.
'com.braintreepayments.api:braintree-api:1.2.4'
<dependency>
<groupId>com.braintreepayments.api</groupId>
<artifactId>braintree-api</artifactId>
<version>1.2.4</version>
</dependency>
<dependency org="com.braintreepayments.api" name="braintree-api" rev="1.2.4"/>
"com.braintreepayments.api", "braintree-api", "1.2.4"