PayPal

MainActivity.java

package com.putuguna.paymentpaypal;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import com.paypal.android.sdk.payments.PayPalConfiguration;
import com.paypal.android.sdk.payments.PayPalPayment;
import com.paypal.android.sdk.payments.PayPalService;
import com.paypal.android.sdk.payments.PaymentActivity;
import com.paypal.android.sdk.payments.PaymentConfirmation;

import org.json.JSONException;

import java.math.BigDecimal;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    public static final int PAYPAL_REQUEST_CODE  = 123;

    private static PayPalConfiguration config = new PayPalConfiguration()
            .environment(PayPalConfiguration.ENVIRONMENT_SANDBOX)
            .clientId(PaypalConfig.PAYPAL_CLIENT_ID);

    private Button btnPaypal;
    private EditText etAmount;
    private String mPaymentAmount;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btnPaypal = (Button) findViewById(R.id.buttonPay);
        etAmount = (EditText) findViewById(R.id.editTextAmount);

        btnPaypal.setOnClickListener(this);

        Intent intent = new Intent(this, PayPalService.class);
        intent.putExtra(PayPalService.EXTRA_PAYPAL_CONFIGURATION, config);
        startService(intent);


    }

    @Override
    public void onClick(View view) {
        getPayment();
    }

    private void getPayment(){
        //getting the amount from edittext
        mPaymentAmount = etAmount.getText().toString();

        //creating a paypalpayment
        PayPalPayment payment = new PayPalPayment(new BigDecimal(String.valueOf(mPaymentAmount)), "USD", "putuguna fee", PayPalPayment.PAYMENT_INTENT_SALE);

        //creating paypal payment activity intent
        Intent intents = new Intent(this, PaymentActivity.class);
        intents.putExtra(PayPalService.EXTRA_PAYPAL_CONFIGURATION, config);
        intents.putExtra(PaymentActivity.EXTRA_PAYMENT, payment);
        startActivityForResult(intents, PAYPAL_REQUEST_CODE);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        //super.onActivityResult(requestCode, resultCode, data);

        if(requestCode == PAYPAL_REQUEST_CODE){
            if(resultCode == RESULT_OK){
                //getting payment confirmation
                PaymentConfirmation confirmation = data.getParcelableExtra(PaymentActivity.EXTRA_RESULT_CONFIRMATION);

                //if confimation isn't null
                if(confirmation!=null){
                    //getting the payment detail
                    try {
                        String paymentDetails = confirmation.toJSONObject().toString(4);
                        Log.d("TAG",    "PAYMENT EXAMPLE : " + paymentDetails);

                        //starting a new activity for the payment details and also putting the payment details with intent
                        startActivity(new Intent(this, ConfirmationActivity.class)
                        .putExtra("PaymentDetails", paymentDetails)
                        .putExtra("PaymentAmount", mPaymentAmount));
                    } catch (JSONException e) {
                        e.printStackTrace();
                        Log.e("paymentExample", "an extremely unlikely failure occurred: ", e);
                    }
                }
            }else if(resultCode==RESULT_CANCELED){
                Log.i("paymentExample", "The user canceled.");
            }else if(resultCode==PaymentActivity.RESULT_EXTRAS_INVALID){
                Log.i("paymentExample", "An invalid Payment or PayPalConfiguration was submitted. Please see the docs.");
            }
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        stopService(new Intent(this, PayPalService.class));
    }
}

good