package co.paystack.example;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import org.json.JSONException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.Calendar;
import co.paystack.android.Paystack;
import co.paystack.android.PaystackSdk;
import co.paystack.android.Transaction;
import co.paystack.android.exceptions.ExpiredAccessCodeException;
import co.paystack.android.model.Card;
import co.paystack.android.model.Charge;
public class MainActivity extends AppCompatActivity {
// To get started quickly, change this to your heroku deployment of
// https://github.com/PaystackHQ/sample-charge-card-backend
// Step 1. Visit https://github.com/PaystackHQ/sample-charge-card-backend
// Step 2. Click "Deploy to heroku"
// Step 3. Login with your heroku credentials or create a free heroku account
// Step 4. Provide your secret key and an email with which to start all test transactions
// Step 5. Copy the url generated by heroku (format https://some-url.herokuapp.com) into the space below
String backend_url = "https://infinite-peak-60063.herokuapp.com";
// Set this to a public key that matches the secret key you supplied while creating the heroku instance
String paystack_public_key = "pk_live_2bf31d4aea08ab31f5d0cfd645c7e4f67025d259";
EditText mEditCardNum;
EditText mEditCVC;
EditText mEditExpiryMonth;
EditText mEditExpiryYear;
TextView mTextError;
TextView mTextBackendMessage;
ProgressDialog dialog;
private TextView mTextReference;
private Charge charge;
private Transaction transaction;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (BuildConfig.DEBUG && (backend_url.equals(""))) {
throw new AssertionError("Please set a backend url before running the sample");
}
if (BuildConfig.DEBUG && (paystack_public_key.equals(""))) {
throw new AssertionError("Please set a public key before running the sample");
}
PaystackSdk.setPublicKey(paystack_public_key);
mEditCardNum = findViewById(R.id.edit_card_number);
mEditCVC = findViewById(R.id.edit_cvc);
mEditExpiryMonth = findViewById(R.id.edit_expiry_month);
mEditExpiryYear = findViewById(R.id.edit_expiry_year);
Button mButtonPerformTransaction = findViewById(R.id.button_perform_transaction);
Button mButtonPerformLocalTransaction = findViewById(R.id.button_perform_local_transaction);
mTextError = findViewById(R.id.textview_error);
mTextBackendMessage = findViewById(R.id.textview_backend_message);
mTextReference = findViewById(R.id.textview_reference);
//initialize sdk
PaystackSdk.initialize(getApplicationContext());
//set click listener
mButtonPerformTransaction.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
try {
startAFreshCharge(false);
} catch (Exception e) {
MainActivity.this.mTextError.setText(String.format("An error occurred while charging card: %s %s", e.getClass().getSimpleName(), e.getMessage()));
}
}
});
mButtonPerformLocalTransaction.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
try {
startAFreshCharge(true);
} catch (Exception e) {
MainActivity.this.mTextError.setText(String.format("An error occurred while charging card: %s %s", e.getClass().getSimpleName(), e.getMessage()));
}
}
});
}
private void startAFreshCharge(boolean local) {
// initialize the charge
charge = new Charge();
charge.setCard(loadCardFromForm());
dialog = new ProgressDialog(MainActivity.this);
dialog.setMessage("Performing transaction... please wait");
dialog.show();
if (local) {
// Set transaction params directly in app (note that these params
// are only used if an access_code is not set. In debug mode,
// setting them after setting an access code would throw an exception
charge.setAmount(2000);
charge.setEmail("[email protected]");
charge.setReference("ChargedFromAndroid_" + Calendar.getInstance().getTimeInMillis());
try {
charge.putCustomField("Charged From", "Android SDK");
} catch (JSONException e) {
e.printStackTrace();
}
chargeCard();
} else {
// Perform transaction/initialize on our server to get an access code
// documentation: https://developers.paystack.co/reference#initialize-a-transaction
new fetchAccessCodeFromServer().execute(backend_url + "/new-access-code");
}
}
/**
* Method to validate the form, and set errors on the edittexts.
*/
private Card loadCardFromForm() {
//validate fields
Card card;
String cardNum = mEditCardNum.getText().toString().trim();
//build card object with ONLY the number, update the other fields later
card = new Card.Builder(cardNum, 0, 0, "").build();
String cvc = mEditCVC.getText().toString().trim();
//update the cvc field of the card
card.setCvc(cvc);
//validate expiry month;
String sMonth = mEditExpiryMonth.getText().toString().trim();
int month = 0;
try {
month = Integer.parseInt(sMonth);
} catch (Exception ignored) {
}
card.setExpiryMonth(month);
String sYear = mEditExpiryYear.getText().toString().trim();
int year = 0;
try {
year = Integer.parseInt(sYear);
} catch (Exception ignored) {
}
card.setExpiryYear(year);
return card;
}
@Override
public void onPause() {
super.onPause();
if ((dialog != null) && dialog.isShowing()) {
dialog.dismiss();
}
dialog = null;
}
private void chargeCard() {
transaction = null;
PaystackSdk.chargeCard(MainActivity.this, charge, new Paystack.TransactionCallback() {
// This is called only after transaction is successful
@Override
public void onSuccess(Transaction transaction) {
dismissDialog();
MainActivity.this.transaction = transaction;
mTextError.setText(" ");
Toast.makeText(MainActivity.this, transaction.getReference(), Toast.LENGTH_LONG).show();
updateTextViews();
new verifyOnServer().execute(transaction.getReference());
}
// This is called only before requesting OTP
// Save reference so you may send to server if
// error occurs with OTP
// No need to dismiss dialog
@Override
public void beforeValidate(Transaction transaction) {
MainActivity.this.transaction = transaction;
Toast.makeText(MainActivity.this, transaction.getReference(), Toast.LENGTH_LONG).show();
updateTextViews();
}
@Override
public void onError(Throwable error, Transaction transaction) {
// If an access code has expired, simply ask your server for a new one
// and restart the charge instead of displaying error
MainActivity.this.transaction = transaction;
if (error instanceof ExpiredAccessCodeException) {
MainActivity.this.startAFreshCharge(false);
MainActivity.this.chargeCard();
return;
}
dismissDialog();
if (transaction.getReference() != null) {
Toast.makeText(MainActivity.this, transaction.getReference() + " concluded with error: " + error.getMessage(), Toast.LENGTH_LONG).show();
mTextError.setText(String.format("%s concluded with error: %s %s", transaction.getReference(), error.getClass().getSimpleName(), error.getMessage()));
new verifyOnServer().execute(transaction.getReference());
} else {
Toast.makeText(MainActivity.this, error.getMessage(), Toast.LENGTH_LONG).show();
mTextError.setText(String.format("Error: %s %s", error.getClass().getSimpleName(), error.getMessage()));
}
updateTextViews();
}
});
}
private void dismissDialog() {
if ((dialog != null) && dialog.isShowing()) {
dialog.dismiss();
}
}
private void updateTextViews() {
if (transaction.getReference() != null) {
mTextReference.setText(String.format("Reference: %s", transaction.getReference()));
} else {
mTextReference.setText("No transaction");
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
private boolean isEmpty(String s) {
return s == null || s.length() < 1;
}
private class fetchAccessCodeFromServer extends AsyncTask<String, Void, String> {
private String error;
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if (result != null) {
charge.setAccessCode(result);
chargeCard();
} else {
MainActivity.this.mTextBackendMessage.setText(String.format("There was a problem getting a new access code form the backend: %s", error));
dismissDialog();
}
}
@Override
protected String doInBackground(String... ac_url) {
try {
URL url = new URL(ac_url[0]);
BufferedReader in = new BufferedReader(
new InputStreamReader(
url.openStream()));
String inputLine;
inputLine = in.readLine();
in.close();
return inputLine;
} catch (Exception e) {
error = e.getClass().getSimpleName() + ": " + e.getMessage();
}
return null;
}
}
private class verifyOnServer extends AsyncTask<String, Void, String> {
private String reference;
private String error;
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if (result != null) {
MainActivity.this.mTextBackendMessage.setText(String.format("Gateway response: %s", result));
} else {
MainActivity.this.mTextBackendMessage.setText(String.format("There was a problem verifying %s on the backend: %s ", this.reference, error));
dismissDialog();
}
}
@Override
protected String doInBackground(String... reference) {
try {
this.reference = reference[0];
URL url = new URL(backend_url + "/verify/" + this.reference);
BufferedReader in = new BufferedReader(
new InputStreamReader(
url.openStream()));
String inputLine;
inputLine = in.readLine();
in.close();
return inputLine;
} catch (Exception e) {
error = e.getClass().getSimpleName() + ": " + e.getMessage();
}
return null;
}
}
}
