¿Cómo integrar Paypal en la aplicación Android?

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("[email protected]"); // 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); } 

PayPal lanza Android SDK para desarrolladores

https://www.paypal-forward.com/innovation/paypal-launches-android-sdk-for-developers/

La documentación Aquí:

https://developer.paypal.com/webapps/developer/docs/integration/mobile/android-integration-guide/

 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' }