This is an example of how you can build a simple currency converter service in android using Google's API. You can get a free access key here: https://currencylayer.com/signup/free
Requirements: Volley Library Add this to your App Gradle: implementation 'com.mcxiaoke.volley:library:1.0.1'
Changes to the Manifest: - Under the application tag: <uses-library android:name="org.apache.http.legacy" android:required="false" /> - Under the Permissions tag: <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.INTERNET" />