Foreground request

An overview of the Foreground request message for Android.

• Overview
• Foreground request
• Key to card terminal product categories
• Get Support

Overview

👉 The Foreground request is used to bring to the POS application to the foreground when desired.

The client app must implement a mechanism to send messages using Android intents and URI calls and to receive the result in a custom URI callback.

• Foreground request originating from the client app to bring Card terminal app to foreground.

Foreground request

For a typical Foreground request, the client app must provide the following information:

Field	Description	Example	Required	Card terminal support
scheme	The Viva's custom URL scheme, the host and the version.	'vivapayclient://pay/v1'	✅
merchantKey	The merchant's key. For successful validation, should not be empty. Deprecated: you may pass any value.	'SG23323424EXS3'
appId	The client app ID. For successful validation, should not be empty.	'com.example.myapp'	✅
action	The parameter to trigger an action. For foreground action, it should be set as 'foreground'.	'foreground'	✅
callback	The URI callback that will handle the result. For successful validation, should not be empty.	'mycallbackscheme://result'	✅

This action does not send back a response.

The above information elements must create a URI call, i.e.

String reqStr = "vivapayclient://pay/v1"
		+ "?merchantKey="MY_MERCHANT_KEY"
		+ "&appId=com.example.myapp"
		+ "&action=foreground"
		+ "&callback=mycallbackscheme://result";

Intent payIntent = new Intent(Intent.ACTION_VIEW, Uri.parse( reqStr));
payIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
payIntent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
startActivity(payIntent);

Key to card terminal product categories

To understand the icons used on the above table, see the below table.

Product category	Terminal models	Icon
Android Card Terminals	Android Card Terminal Ethernet, Android Card Terminal 4G, Mobile Card Terminal Plus, Mobile Card Terminal.
Viva Wallet POS app for Android	Mini Card Reader, Pocket Card Terminal connected via Bluetooth or USB to the Viva Wallet POS app for Android.
Linux Card Terminals	Countertop, IM20, S900, S800, D200.

Get Support

If you would like to integrate with Viva Wallet, or if you have any queries about our products and solutions, please see our Get Support page to see how we can help!