diff --git a/java/app/build.gradle.kts b/java/app/build.gradle.kts
new file mode 100644
index 0000000..7668573
--- /dev/null
+++ b/java/app/build.gradle.kts
@@ -0,0 +1,63 @@
+plugins {
+ id("com.android.application")
+}
+
+android {
+ namespace = "com.google.android.gms.samples.wallet"
+ compileSdk = 34
+
+ defaultConfig {
+ applicationId = "com.google.android.gms.samples.wallet"
+ minSdk = 26
+ targetSdk = 34
+ versionCode = 1
+ versionName = "1.0"
+
+ testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+ vectorDrawables {
+ useSupportLibrary = true
+ }
+ }
+
+ buildTypes {
+ release {
+ isMinifyEnabled = false
+ proguardFiles(
+ getDefaultProguardFile("proguard-android-optimize.txt"),
+ "proguard-rules.pro"
+ )
+ }
+ }
+
+ compileOptions {
+ sourceCompatibility = JavaVersion.VERSION_1_8
+ targetCompatibility = JavaVersion.VERSION_1_8
+ }
+
+ viewBinding {
+ enable = true
+ }
+
+ packaging {
+ resources {
+ excludes += "/META-INF/{AL2.0,LGPL2.1}"
+ }
+ }
+}
+
+dependencies {
+
+ // Google Wallet dependencies
+ implementation("com.google.android.gms:play-services-pay:16.4.0")
+
+ implementation("androidx.appcompat:appcompat:1.6.1")
+
+ val lifecycle_version = "2.5.1"
+ implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version")
+ implementation("androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version")
+
+ testImplementation("junit:junit:4.13.2")
+ androidTestImplementation("androidx.test.ext:junit:1.1.5")
+ androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
+ androidTestImplementation("androidx.compose.ui:ui-test-junit4:1.5.4")
+}
\ No newline at end of file
diff --git a/java/app/proguard-rules.pro b/java/app/proguard-rules.pro
new file mode 100644
index 0000000..481bb43
--- /dev/null
+++ b/java/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+# http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+# public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/java/app/src/androidTest/java/com/google/android/gms/samples/wallet/ExampleInstrumentedTest.kt b/java/app/src/androidTest/java/com/google/android/gms/samples/wallet/ExampleInstrumentedTest.kt
new file mode 100644
index 0000000..bdf0662
--- /dev/null
+++ b/java/app/src/androidTest/java/com/google/android/gms/samples/wallet/ExampleInstrumentedTest.kt
@@ -0,0 +1,24 @@
+package com.google.android.gms.samples.wallet
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+ @Test
+ fun useAppContext() {
+ // Context of the app under test.
+ val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+ assertEquals("com.google.android.gms.samples.wallet", appContext.packageName)
+ }
+}
\ No newline at end of file
diff --git a/java/app/src/main/AndroidManifest.xml b/java/app/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..50bb1b9
--- /dev/null
+++ b/java/app/src/main/AndroidManifest.xml
@@ -0,0 +1,27 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/java/app/src/main/java/com/google/android/gms/samples/wallet/MainActivity.java b/java/app/src/main/java/com/google/android/gms/samples/wallet/MainActivity.java
new file mode 100644
index 0000000..ef975fd
--- /dev/null
+++ b/java/app/src/main/java/com/google/android/gms/samples/wallet/MainActivity.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2023 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.gms.samples.wallet;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Toast;
+
+import androidx.activity.ComponentActivity;
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.IntentSenderRequest;
+import androidx.activity.result.contract.ActivityResultContracts;
+import androidx.annotation.Nullable;
+import androidx.lifecycle.ViewModelProvider;
+
+import com.google.android.gms.pay.PayClient;
+import com.google.android.gms.samples.wallet.databinding.ActivitySavePassBinding;
+import com.google.android.gms.samples.wallet.viewmodel.WalletViewModel;
+
+public class MainActivity extends ComponentActivity {
+
+ private WalletViewModel model;
+
+ private static final int ADD_TO_GOOGLE_WALLET_REQUEST_CODE = 999;
+
+ private View addToGoogleWalletButtonContainer;
+ private View addToGoogleWalletButton;
+
+ /**
+ * Initialize the Google Pay API on creation of the activity
+ *
+ * @see android.app.Activity#onCreate(android.os.Bundle)
+ */
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ initializeUi();
+
+ // Check Google Pay availability
+ model = new ViewModelProvider(this).get(WalletViewModel.class);
+
+ // Check out Google Wallet availability
+ model.canAddPasses.observe(this, this::setAddToGoogleWalletAvailable);
+ }
+
+ private void initializeUi() {
+
+ // Use view binding to access the UI elements
+ ActivitySavePassBinding layoutBinding = ActivitySavePassBinding.inflate(getLayoutInflater());
+ setContentView(layoutBinding.getRoot());
+
+ addToGoogleWalletButton = layoutBinding.addToGoogleWalletButton.getRoot();
+ addToGoogleWalletButtonContainer = layoutBinding.passContainer;
+ addToGoogleWalletButton.setOnClickListener(v -> {
+ addToGoogleWalletButton.setClickable(false);
+ model.savePassesJwt(model.genericObjectJwt, this, ADD_TO_GOOGLE_WALLET_REQUEST_CODE);
+ });
+ }
+
+ /**
+ * If getPayApiAvailabilityStatus returned {@code true}, show the "Add to Google Wallet" button.
+ * Otherwise, notify the user that Google Wallet is not available. Please adjust to fit in with
+ * your current user flow. You are not required to explicitly let the user know if isReadyToPay
+ * returns {@code false}.
+ *
+ * @param available isReadyToPay API response.
+ */
+ private void setAddToGoogleWalletAvailable(boolean available) {
+ if (available) {
+ addToGoogleWalletButtonContainer.setVisibility(View.VISIBLE);
+ } else {
+ Toast.makeText(
+ this,
+ R.string.google_wallet_status_unavailable,
+ Toast.LENGTH_LONG).show();
+ }
+ }
+
+ @Override
+ protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
+ super.onActivityResult(requestCode, resultCode, data);
+
+ if (requestCode == ADD_TO_GOOGLE_WALLET_REQUEST_CODE) {
+ switch (resultCode) {
+ case RESULT_OK: {
+ Toast
+ .makeText(this, getString(R.string.add_google_wallet_success), Toast.LENGTH_LONG)
+ .show();
+ break;
+ }
+
+ case RESULT_CANCELED: {
+ // TODO Handle save canceled
+ break;
+ }
+
+ case PayClient.SavePassesResult.SAVE_ERROR: {
+ if (data != null) {
+ String apiErrorMessage = data.getStringExtra(PayClient.EXTRA_API_ERROR_MESSAGE);
+ // TODO Handle API error
+ }
+ break;
+ }
+
+ default: // TODO Handle other outcomes
+ }
+
+ addToGoogleWalletButton.setClickable(true);
+ }
+ }
+}
\ No newline at end of file
diff --git a/java/app/src/main/java/com/google/android/gms/samples/wallet/viewmodel/WalletViewModel.java b/java/app/src/main/java/com/google/android/gms/samples/wallet/viewmodel/WalletViewModel.java
new file mode 100644
index 0000000..318e338
--- /dev/null
+++ b/java/app/src/main/java/com/google/android/gms/samples/wallet/viewmodel/WalletViewModel.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2023 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.gms.samples.wallet.viewmodel;
+
+import android.app.Activity;
+import android.app.Application;
+import androidx.lifecycle.AndroidViewModel;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import com.google.android.gms.pay.Pay;
+import com.google.android.gms.pay.PayApiAvailabilityStatus;
+import com.google.android.gms.pay.PayClient;
+
+public class WalletViewModel extends AndroidViewModel {
+
+ // A client to interact with the Google Wallet API
+ private final PayClient walletClient;
+
+ // LiveData with the result of whether the user can save passes with Google Wallet
+ private final MutableLiveData _canAddPasses = new MutableLiveData<>();
+ public final LiveData canAddPasses = _canAddPasses;
+
+ public WalletViewModel(Application application) {
+ super(application);
+ walletClient = Pay.getClient(application);
+
+ fetchCanAddPassesToGoogleWallet();
+ }
+
+ /**
+ * Determine whether the API to save passes to Google Pay is available on the device.
+ */
+ private void fetchCanAddPassesToGoogleWallet() {
+ walletClient
+ .getPayApiAvailabilityStatus(PayClient.RequestType.SAVE_PASSES)
+ .addOnSuccessListener(
+ status -> _canAddPasses.setValue(status == PayApiAvailabilityStatus.AVAILABLE))
+ // If the API is not available, we recommend to either:
+ // 1) Hide the save button
+ // 2) Fall back to a different Save Passes integration (e.g. JWT link)
+ // Note that a user might become eligible in the future.
+
+ // Google Play Services is too old. API availability can't be verified.
+ .addOnFailureListener(exception -> _canAddPasses.setValue(false));
+ }
+
+ /**
+ * Exposes the `savePassesJwt` method in the wallet client
+ */
+ public void savePassesJwt(String jwtString, Activity activity, int requestCode) {
+ walletClient.savePassesJwt(jwtString, activity, requestCode);
+ }
+
+ /**
+ * Exposes the `savePasses` method in the wallet client
+ */
+ public void savePasses(String objectString, Activity activity, int requestCode) {
+ walletClient.savePasses(objectString, activity, requestCode);
+ }
+
+ // Test generic object used to be created against the API
+ // See https://developers.google.com/wallet/tickets/boarding-passes/web#json_web_token_jwt for more details
+ public final String genericObjectJwt = "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9.eyJhdWQiOiJnb29nbGUiLCJwYXlsb2FkIjp7ImdlbmVyaWNPYmplY3RzIjpbeyJpZCI6IjMzODgwMDAwMDAwMjIwOTUxNzcuZjUyZDRhZjYtMjQxMS00ZDU5LWFlNDktNzg2ZDY3N2FkOTJiIn1dfSwiaXNzIjoid2FsbGV0LWxhYi10b29sc0BhcHBzcG90LmdzZXJ2aWNlYWNjb3VudC5jb20iLCJ0eXAiOiJzYXZldG93YWxsZXQiLCJpYXQiOjE2NTA1MzI2MjN9.ZURFHaSiVe3DfgXghYKBrkPhnQy21wMR9vNp84azBSjJxENxbRBjqh3F1D9agKLOhrrflNtIicShLkH4LrFOYdnP6bvHm6IMFjqpUur0JK17ZQ3KUwQpejCgzuH4u7VJOP_LcBEnRtzZm0PyIvL3j5-eMRyRAo5Z3thGOsKjqCPotCAk4Z622XHPq5iMNVTvcQJaBVhmpmjRLGJs7qRp87sLIpYOYOkK8BD7OxLmBw9geqDJX-Y1zwxmQbzNjd9z2fuwXX66zMm7pn6GAEBmJiqollFBussu-QFEopml51_5nf4JQgSdXmlfPrVrwa6zjksctIXmJSiVpxL7awKN2w";
+}
\ No newline at end of file
diff --git a/java/app/src/main/res/drawable-v21/add_to_google_wallet_button_background.xml b/java/app/src/main/res/drawable-v21/add_to_google_wallet_button_background.xml
new file mode 100644
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--- /dev/null
+++ b/java/app/src/main/res/drawable-v21/add_to_google_wallet_button_background.xml
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+
+
+ -
+
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+
+
+
+
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diff --git a/java/app/src/main/res/drawable/add_to_google_wallet_button_background.xml b/java/app/src/main/res/drawable/add_to_google_wallet_button_background.xml
new file mode 100644
index 0000000..b49cbe8
--- /dev/null
+++ b/java/app/src/main/res/drawable/add_to_google_wallet_button_background.xml
@@ -0,0 +1,11 @@
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+ -
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+
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+
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+
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\ No newline at end of file
diff --git a/java/app/src/main/res/drawable/add_to_google_wallet_button_content.xml b/java/app/src/main/res/drawable/add_to_google_wallet_button_content.xml
new file mode 100644
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--- /dev/null
+++ b/java/app/src/main/res/drawable/add_to_google_wallet_button_content.xml
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diff --git a/java/app/src/main/res/drawable/check_circle.xml b/java/app/src/main/res/drawable/check_circle.xml
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--- /dev/null
+++ b/java/app/src/main/res/drawable/check_circle.xml
@@ -0,0 +1,10 @@
+
+
+
diff --git a/java/app/src/main/res/drawable/ic_launcher_background.xml b/java/app/src/main/res/drawable/ic_launcher_background.xml
new file mode 100644
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+++ b/java/app/src/main/res/drawable/ic_launcher_background.xml
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diff --git a/java/app/src/main/res/drawable/ic_launcher_foreground.xml b/java/app/src/main/res/drawable/ic_launcher_foreground.xml
new file mode 100644
index 0000000..2b068d1
--- /dev/null
+++ b/java/app/src/main/res/drawable/ic_launcher_foreground.xml
@@ -0,0 +1,30 @@
+
+
+
+
+