Documentation

Voids a transaction silently by UTI. Printing of the void receipt is suppressed by default; set DISABLE_PRINTING = "false" to print.

HashMap<String, String> params = new HashMap<>();
params.put(Parameters.DISABLE_PRINTING, "false");
params.put(Parameters.REFERENCE_ID, "void-ref-001");
Api.voidTransaction(context, uti, params);

Response: VOID_RESULT_ACTION

case Messages.VOID_RESULT_ACTION: {
    boolean success = intent.getBooleanExtra(Messages.VOID_RESULT, false);
    String uti      = intent.getStringExtra(Messages.TRANSACTION_UTI);
    break;
}

Shows the list of voidable transactions for the operator to select from. A transaction is voidable if it is less than a day old and has not already been voided.

Api.showVoidList(context);
// With locale override
HashMap<String, String> params = new HashMap<>();
params.put(Parameters.LOCALE, "is_IS");
Api.showVoidList(context, params);