¿Cómo integrar Paypal en la aplicación Android?

Trato de integrar paypal con la aplicación de Android utilizando sandbox. Estoy consiguiendo con éxito el anhelo con PayPal, pero cuando estoy haciendo el pago, pantalla se pondrá invisible directamente sin respuesta .
¿Cómo puedo obtener la respuesta para la pregunta anterior?

Este es mi código.

private void invokeSimplePayment() { try { PayPalPayment payment = new PayPalPayment(); payment.setSubtotal(new BigDecimal(Amt)); payment.setCurrencyType(Currency_code[code]); payment.setRecipient("Rec_Email"); payment.setPaymentType(PayPal.PAYMENT_TYPE_GOODS); Intent checkoutIntent = PayPal.getInstance().checkout(payment, this); startActivityForResult(checkoutIntent, request); } catch (Exception e) { e.printStackTrace(); } } public void onActivityResults(int requestCode, int resultCode, Intent data) { switch(resultCode) { case Activity.RESULT_OK: resultTitle = "SUCCESS"; resultInfo = "You have successfully completed this " ; //resultExtra = "Transaction ID: " + data.getStringExtra(PayPalActivity.EXTRA_PAY_KEY); break; case Activity.RESULT_CANCELED: resultTitle = "CANCELED"; resultInfo = "The transaction has been cancelled."; resultExtra = ""; break; case PayPalActivity.RESULT_FAILURE: resultTitle = "FAILURE"; resultInfo = data.getStringExtra(PayPalActivity.EXTRA_ERROR_MESSAGE); resultExtra = "Error ID: " + data.getStringExtra(PayPalActivity.EXTRA_ERROR_ID); } System.out.println("Result=============="+resultTitle); System.out.println("ResultInfo=============="+resultInfo); } 

Este es mi código y funciona bien. Hay dos clases.

Para PayPal de sandbox a vivir el medio ambiente que tiene que hacer 2 cosas: poner el titular de la cuenta real en el receptor del conjunto y obtener un ID en vivo mediante la presentación de su aplicación a PayPal

 public class ResultDelegate implements PayPalResultDelegate, Serializable { private static final long serialVersionUID = 10001L; public void onPaymentSucceeded(String payKey, String paymentStatus) { main.resultTitle = "SUCCESS"; main.resultInfo = "You have successfully completed your transaction."; main.resultExtra = "Key: " + payKey; } public void onPaymentFailed(String paymentStatus, String correlationID, String payKey, String errorID, String errorMessage) { main.resultTitle = "FAILURE"; main.resultInfo = errorMessage; main.resultExtra = "Error ID: " + errorID + "\nCorrelation ID: " + correlationID + "\nPay Key: " + payKey; } public void onPaymentCanceled(String paymentStatus) { main.resultTitle = "CANCELED"; main.resultInfo = "The transaction has been cancelled."; main.resultExtra = ""; } 

La clase principal:

 public class main extends Activity implements OnClickListener { // The PayPal server to be used - can also be ENV_NONE and ENV_LIVE private static final int server = PayPal.ENV_LIVE; // The ID of your application that you received from PayPal private static final String appID = "APP-0N8000046V443613X"; // This is passed in for the startActivityForResult() android function, the value used is up to you private static final int request = 1; public static final String build = "10.12.09.8053"; protected static final int INITIALIZE_SUCCESS = 0; protected static final int INITIALIZE_FAILURE = 1; TextView labelSimplePayment; LinearLayout layoutSimplePayment; CheckoutButton launchSimplePayment; Button exitApp; TextView title; TextView info; TextView extra; TextView labelKey; TextView appVersion; EditText enterPreapprovalKey; public static String resultTitle; public static String resultInfo; public static String resultExtra; private String isuename; private String isueprice; Handler hRefresh = new Handler(){ @Override public void handleMessage(Message msg) { switch(msg.what){ case INITIALIZE_SUCCESS: setupButtons(); break; case INITIALIZE_FAILURE: showFailure(); break; } } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); Thread libraryInitializationThread = new Thread() { @Override public void run() { initLibrary(); // The library is initialized so let's create our CheckoutButton and update the UI. if (PayPal.getInstance().isLibraryInitialized()) { hRefresh.sendEmptyMessage(INITIALIZE_SUCCESS); } else { hRefresh.sendEmptyMessage(INITIALIZE_FAILURE); } } }; libraryInitializationThread.start(); isuename=getIntent().getStringExtra("name").trim(); isueprice=getIntent().getStringExtra("price").replace("$", "").trim(); Log.v("isuename ",""+isuename); Log.v("isueprice ",""+isueprice); LinearLayout content = new LinearLayout(this); content.setLayoutParams(new LayoutParams(android.view.ViewGroup.LayoutParams.FILL_PARENT, android.view.ViewGroup.LayoutParams.FILL_PARENT)); content.setGravity(Gravity.CENTER_HORIZONTAL); content.setOrientation(LinearLayout.VERTICAL); content.setPadding(10, 10, 10, 10); content.setBackgroundColor(Color.WHITE); layoutSimplePayment = new LinearLayout(this); layoutSimplePayment.setLayoutParams(new LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT)); layoutSimplePayment.setGravity(Gravity.CENTER_HORIZONTAL); layoutSimplePayment.setOrientation(LinearLayout.VERTICAL); layoutSimplePayment.setPadding(0, 5, 0, 5); labelSimplePayment = new TextView(this); labelSimplePayment.setGravity(Gravity.CENTER_HORIZONTAL); labelSimplePayment.setText("C&EN"); labelSimplePayment.setTextColor(Color.RED); labelSimplePayment.setTextSize(45.0f); layoutSimplePayment.addView(labelSimplePayment); // labelSimplePayment.setVisibility(View.GONE); content.addView(layoutSimplePayment); LinearLayout layoutKey = new LinearLayout(this); layoutKey.setLayoutParams(new LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT)); layoutKey.setGravity(Gravity.CENTER_HORIZONTAL); layoutKey.setOrientation(LinearLayout.VERTICAL); layoutKey.setPadding(0, 1, 0, 5); enterPreapprovalKey = new EditText(this); enterPreapprovalKey.setLayoutParams(new LayoutParams(200, 45)); enterPreapprovalKey.setGravity(Gravity.CENTER); enterPreapprovalKey.setSingleLine(true); enterPreapprovalKey.setHint("Enter PA Key"); layoutKey.addView(enterPreapprovalKey); enterPreapprovalKey.setVisibility(View.GONE); labelKey = new TextView(this); labelKey.setGravity(Gravity.CENTER_HORIZONTAL); labelKey.setPadding(0, -5, 0, 0); labelKey.setText("(Required for Preapproval)"); layoutKey.addView(labelKey); labelKey.setVisibility(View.GONE); content.addView(layoutKey); title = new TextView(this); title.setLayoutParams(new LinearLayout.LayoutParams(android.view.ViewGroup.LayoutParams.FILL_PARENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT)); title.setPadding(0, 5, 0, 5); title.setGravity(Gravity.CENTER_HORIZONTAL); title.setTextSize(30.0f); title.setVisibility(View.GONE); content.addView(title); info = new TextView(this); info.setLayoutParams(new LinearLayout.LayoutParams(android.view.ViewGroup.LayoutParams.FILL_PARENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT)); info.setPadding(0, 5, 0, 5); info.setGravity(Gravity.CENTER_HORIZONTAL); info.setTextSize(20.0f); info.setVisibility(View.VISIBLE); info.setText("Please Wait! Initializing Paypal..."); info.setTextColor(Color.BLACK); content.addView(info); extra = new TextView(this); extra.setLayoutParams(new LinearLayout.LayoutParams(android.view.ViewGroup.LayoutParams.FILL_PARENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT)); extra.setPadding(0, 5, 0, 5); extra.setGravity(Gravity.CENTER_HORIZONTAL); extra.setTextSize(12.0f); extra.setVisibility(View.GONE); content.addView(extra); LinearLayout layoutExit = new LinearLayout(this); layoutExit.setLayoutParams(new LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT)); layoutExit.setGravity(Gravity.CENTER_HORIZONTAL); layoutExit.setOrientation(LinearLayout.VERTICAL); layoutExit.setPadding(0, 15, 0, 5); exitApp = new Button(this); exitApp.setLayoutParams(new LayoutParams(200, android.view.ViewGroup.LayoutParams.WRAP_CONTENT)); //Semi mimic PP button sizes exitApp.setOnClickListener(this); exitApp.setText("Exit"); layoutExit.addView(exitApp); content.addView(layoutExit); appVersion = new TextView(this); appVersion.setGravity(Gravity.CENTER_HORIZONTAL); appVersion.setPadding(0, -5, 0, 0); appVersion.setText("\n\nSimple Demo Build " + build + "\nMPL Library Build " + PayPal.getBuild()); content.addView(appVersion); appVersion.setVisibility(View.GONE); setContentView(content); } public void setupButtons() { PayPal pp = PayPal.getInstance(); // Get the CheckoutButton. There are five different sizes. The text on the button can either be of type TEXT_PAY or TEXT_DONATE. launchSimplePayment = pp.getCheckoutButton(this, PayPal.BUTTON_194x37, CheckoutButton.TEXT_PAY); // You'll need to have an OnClickListener for the CheckoutButton. For this application, MPL_Example implements OnClickListener and we // have the onClick() method below. launchSimplePayment.setOnClickListener(this); // The CheckoutButton is an android LinearLayout so we can add it to our display like any other View. layoutSimplePayment.addView(launchSimplePayment); // Get the CheckoutButton. There are five different sizes. The text on the button can either be of type TEXT_PAY or TEXT_DONATE. // Show our labels and the preapproval EditText. labelSimplePayment.setVisibility(View.VISIBLE); info.setText(""); info.setVisibility(View.GONE); } public void showFailure() { title.setText("FAILURE"); info.setText("Could not initialize the PayPal library."); title.setVisibility(View.VISIBLE); info.setVisibility(View.VISIBLE); } private void initLibrary() { PayPal pp = PayPal.getInstance(); if(pp == null) { pp = PayPal.initWithAppID(this, appID, server); pp.setLanguage("en_US"); // Sets the language for the library. pp.setFeesPayer(PayPal.FEEPAYER_EACHRECEIVER); // Set to true if the transaction will require shipping. pp.setShippingEnabled(true); // Dynamic Amount Calculation allows you to set tax and shipping amounts based on the user's shipping address. Shipping must be // enabled for Dynamic Amount Calculation. This also requires you to create a class that implements PaymentAdjuster and Serializable. pp.setDynamicAmountCalculationEnabled(false); // -- } } private PayPalPayment exampleSimplePayment() { // Create a basic PayPalPayment. PayPalPayment payment = new PayPalPayment(); // Sets the currency type for this payment. payment.setCurrencyType("USD"); // Sets the recipient for the payment. This can also be a phone number. payment.setRecipient("harshd_1312435282_per@gmail.com"); // Sets the amount of the payment, not including tax and shipping amounts. payment.setSubtotal(new BigDecimal(isueprice)); // Sets the payment type. This can be PAYMENT_TYPE_GOODS, PAYMENT_TYPE_SERVICE, PAYMENT_TYPE_PERSONAL, or PAYMENT_TYPE_NONE. payment.setPaymentType(PayPal.PAYMENT_TYPE_GOODS); // PayPalInvoiceData can contain tax and shipping amounts. It also contains an ArrayList of PayPalInvoiceItem which can // be filled out. These are not required for any transaction. PayPalInvoiceData invoice = new PayPalInvoiceData(); // Sets the tax amount. invoice.setTax(new BigDecimal("0")); // Sets the shipping amount. invoice.setShipping(new BigDecimal("0")); // PayPalInvoiceItem has several parameters available to it. None of these parameters is required. PayPalInvoiceItem item1 = new PayPalInvoiceItem(); // Sets the name of the item. item1.setName(isuename); // Sets the ID. This is any ID that you would like to have associated with the item. item1.setID("87239"); // Sets the total price which should be (quantity * unit price). The total prices of all PayPalInvoiceItem should add up // to less than or equal the subtotal of the payment. /* item1.setTotalPrice(new BigDecimal("2.99")); // Sets the unit price. item1.setUnitPrice(new BigDecimal("2.00")); // Sets the quantity. item1.setQuantity(3);*/ // Add the PayPalInvoiceItem to the PayPalInvoiceData. Alternatively, you can create an ArrayList<PayPalInvoiceItem> // and pass it to the PayPalInvoiceData function setInvoiceItems(). invoice.getInvoiceItems().add(item1); // Create and add another PayPalInvoiceItem to add to the PayPalInvoiceData. /*PayPalInvoiceItem item2 = new PayPalInvoiceItem(); item2.setName("Well Wishes"); item2.setID("56691"); item2.setTotalPrice(new BigDecimal("2.25")); item2.setUnitPrice(new BigDecimal("0.25")); item2.setQuantity(9); invoice.getInvoiceItems().add(item2);*/ // Sets the PayPalPayment invoice data. payment.setInvoiceData(invoice); // Sets the merchant name. This is the name of your Application or Company. payment.setMerchantName("C&EN"); // Sets the description of the payment. payment.setDescription("simple payment"); // Sets the Custom ID. This is any ID that you would like to have associated with the payment. payment.setCustomID("8873482296"); // Sets the Instant Payment Notification url. This url will be hit by the PayPal server upon completion of the payment. //payment.setIpnUrl("http://www.exampleapp.com/ipn"); // Sets the memo. This memo will be part of the notification sent by PayPal to the necessary parties. payment.setMemo("Hi! I'm making a memo for a payment."); return payment; } @Override public void onClick(View v) { if(v == launchSimplePayment) { // Use our helper function to create the simple payment. PayPalPayment payment = exampleSimplePayment(); // Use checkout to create our Intent. Intent checkoutIntent = PayPal.getInstance().checkout(payment, this, new ResultDelegate()); // Use the android's startActivityForResult() and pass in our Intent. This will start the library. startActivityForResult(checkoutIntent, request); } else if(v == exitApp) { Intent in = new Intent(); in.putExtra("payment", "unpaid"); /*in.putExtra("condition", "false");*/ setResult(1,in);//Here I am Setting the Requestcode 1, you can put according to your requirement finish(); } } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { if(requestCode != request) return; if(main.resultTitle=="SUCCESS"){ Intent in = new Intent(); in.putExtra("payment", "paid"); setResult(22,in); }else if(main.resultTitle=="FAILURE"){ Intent in = new Intent(); in.putExtra("payment", "unpaid"); setResult(22,in); // finish(); }else if(main.resultTitle=="CANCELED"){ Intent in = new Intent(); in.putExtra("payment", "unpaid"); setResult(22,in); // finish(); } launchSimplePayment.updateButton(); title.setText(resultTitle); title.setVisibility(View.VISIBLE); info.setText(resultInfo); info.setVisibility(View.VISIBLE); extra.setText(resultExtra); extra.setVisibility(View.VISIBLE); finish(); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { Intent in = new Intent(); in.putExtra("payment", "unpaid"); setResult(1,in); finish(); return true; } return super.onKeyDown(keyCode, event); } 
 package com.paypal; import android.app.Activity; 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.Toast; 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 org.json.JSONObject; import java.math.BigDecimal; public class MainActivity extends AppCompatActivity { public static String CONFIG_ENVIRONMENT = PayPalConfiguration.ENVIRONMENT_SANDBOX; // note that these credentials will differ between live & sandbox environments. public static String CONFIG_CLIENT_ID = "Add your Client ID"; /// add your paypal client id private static int REQUEST_CODE_PAYMENT = 1; public static PayPalConfiguration config = new PayPalConfiguration() .environment(CONFIG_ENVIRONMENT) .clientId(CONFIG_CLIENT_ID); Button btn_payment; String paypal_id,paypal_state,paypal_amount,paypal_currency_code; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn_payment = (Button)findViewById(R.id.btn_payment); btn_payment.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { onBuyPressed(); } }); } public void onBuyPressed() { PayPalPayment thingToBuy = getThingToBuy(PayPalPayment.PAYMENT_INTENT_SALE); Intent intent = new Intent(MainActivity.this, PaymentActivity.class); intent.putExtra(PayPalService.EXTRA_PAYPAL_CONFIGURATION, config); intent.putExtra(PaymentActivity.EXTRA_PAYMENT, thingToBuy); startActivityForResult(intent, REQUEST_CODE_PAYMENT); } private PayPalPayment getThingToBuy(String paymentIntent) { return new PayPalPayment(new BigDecimal("1"), "USD", "sample item ", paymentIntent); } @Override protected 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); if (confirm != null) { try { Log.e("Show", confirm.toJSONObject().toString(4)); Log.e("Show", confirm.getPayment().toJSONObject().toString(4)); JSONObject json=confirm.toJSONObject(); JSONObject responce = json.getJSONObject("response"); paypal_id = responce.getString("id"); paypal_state = responce.getString("state"); JSONObject payment=confirm.getPayment().toJSONObject(); paypal_amount=payment.getString("amount"); paypal_currency_code=payment.getString("currency_code"); Toast.makeText(getApplicationContext(), "PaymentConfirmation info received" + " from PayPal", Toast.LENGTH_LONG).show(); } catch (JSONException e) { Toast.makeText(getApplicationContext(), "an extremely unlikely failure" + " occurred:", Toast.LENGTH_LONG).show(); } } } else if (resultCode == Activity.RESULT_CANCELED) { } else if (resultCode == PaymentActivity.RESULT_EXTRAS_INVALID) { Toast.makeText(getApplicationContext(), "An invalid Payment or PayPalConfiguration" + " was submitted. Please see the docs.", Toast.LENGTH_LONG).show(); } } } @Override public void onDestroy() { // Stop service when done stopService(new Intent(this, PayPalService.class)); super.onDestroy(); } } ///////////////// decler paypal activity in manifest /////////////////////////// <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.paypal"> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <!-- for card.io card scanning --> <uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="android.permission.VIBRATE" /> <uses-feature android:name="android.hardware.camera" android:required="false" /> <uses-feature android:name="android.hardware.camera.autofocus" android:required="false" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <!-- pay pal server decler --> <service android:name="com.paypal.android.sdk.payments.PayPalService" android:exported="false" /> <activity android:name="com.paypal.android.sdk.payments.PaymentActivity" /> <activity android:name="com.paypal.android.sdk.payments.LoginActivity" /> <activity android:name="com.paypal.android.sdk.payments.PaymentMethodActivity" /> <activity android:name="com.paypal.android.sdk.payments.PaymentConfirmActivity" /> <activity android:name="io.card.payment.CardIOActivity" android:configChanges="keyboardHidden|orientation" /> <activity android:name="io.card.payment.DataEntryActivity" /> <!-- end --> </application> </manifest> //////////////////// gradel /////////////////// apply plugin: 'com.android.application' android { compileSdkVersion 23 buildToolsVersion "23.0.1" defaultConfig { applicationId "com.paypal" minSdkVersion 16 targetSdkVersion 23 versionCode 1 versionName "1.0" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) testCompile 'junit:junit:4.12' compile 'com.android.support:appcompat-v7:23.0.1' compile 'com.paypal.sdk:paypal-android-sdk:2.14.2' } 
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