VoterCall.java

String voterName = "အောင်ဆန်းစုကြည်";
String voteDob = "1945-06-19";

Map<String, String> params = new HashMap<>();
params.put("dateofbirth", voteDob);
params.put("nrcno", null);
params.put("father_name", null); // optional
Call<Voter> voterCall = checkVoterService.searchVoter(voterName, params);
voterCall.enqueue(new Callback<Voter>() {
	  @Override public void onResponse(Response<Voter> response) {
	    Voter voter = response.body();
	    result.setText(
	        voter.getVoterName() + "\n" + voter.getDateOfBirth() + "\n" + voter.getNrcno());
	  }

	  @Override public void onFailure(Throwable throwable) {
	    // Handle the failure
	  }
	});
}