Payment transaction id paypal on android

I'm developing a mcommerce on the android platform with integration with paypal, the question I have is how to return the payment transaction id?

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (requestCode == REQUEST_CODE_PAYMENT) {
        if (resultCode == Activity.RESULT_OK) {
            PaymentConfirmation confirm =
                  data.getParcelableExtra(PaymentActivity.EXTRA_RESULT_CONFIRMATION);

            //Paypal
            if (confirm != null) {

// try {                         WrapperLog.info ("Paypal Return:" + confirm.toJSONObject (). ToString ());                         WrapperLog.info ("Return getPaypal:" + confirm.getPayment (). ToJSONObject () .ToString ());

                    JSONObject resultPaypal;
                    try {
                        resultPaypal = new JSONObject(confirm.toJSONObject().toString()).optJSONObject("response");
                        this.status_pagamento = resultPaypal.optString("state");

// String idPagamento = resultPaypal.optString ("id");

                        WrapperLog.info("Retorno Status: "+this.status_pagamento);


                    } catch (org.codehaus.jettison.json.JSONException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                    FragmentBuilder.replaceFragment(getActivity(), android.R.id.content, FragmentsEnum.PRODUTO_LIST);

                    Toast.makeText(
                            getActivity(),
                            "PaymentConfirmation info received from PayPal", Toast.LENGTH_LONG)
                            .show();

//} catch (JSONException e) { // Log.e (TAG, "an extremely unlikely failure occurred:", e); //}                 } Here is the return result: remembering that it is the "Quick payment received (transaction unique ID 03E88457BL964445L)" that I want to return to

Paypal return: {"response": {"state": "approved", "id": "PAY-code", "create_time": "2015-04-16T20: 06: 58Z", "intent": "paypal_sdk_version": "2.8.8", "product_name": "PayPal-Android-SDK", "environment": "sandbox"}, response_type ":" payment "}

GetPaypal return: {"amount": "1.00", "short_description": "Mobile", "details": {"tax": "0.00", "subtotal": "1.00" "" "," intent ":" sale "," currency_code ":" BRL "," item_list ": {" items ": [" quantity ":" 1 "," price ":" 1.00 " "s", "currency": "BRL", "name": "memory card."}]}}

If anyone can help me I will be very grateful.