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JolandaVerhoefJolandaVerhoef
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Add booking assistant intelligent feature with Jetpack A2UI
Integrates the Booking Assistant feature into JetPacker: - Adopts official Jetpack A2UI Compose renderer (androidx.a2ui build 16368166) - Implements custom interactive UI catalog (InteractiveOptionPicker, SeatSelectionPicker, BookingStatus) - Groups booking surfaces into collapsible category cards with dynamic action status - Connects to SSE Cloud Run backend coordinator with local dev fallback - Adds Python FastAPI server implementation under jetpacker/server/ with Dockerfile and requirements
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‎jetpacker/.gitignore‎

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# Generated third-party notices
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THIRD_PARTY_NOTICES
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# Python files
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**/__pycache__/
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*.pyc
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‎jetpacker/CONTRIBUTING.md‎

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1. Clone the repository:
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```bash
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git clone https://github.com/android/ai-samples.git
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cd ai-samples/jetpacker
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```
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2. Open the project in Android Studio.
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3. Gradle will automatically sync and resolve dependencies.

‎jetpacker/README.md‎

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</table>
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## Overview
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JetPacker provides users with powerful tools to manage their upcoming trips, build out rich itineraries, record voice notes, manage travel expenses, generate on-device "Trip Summaries and Tips", generate AI reviews, chat with hotel staff via automatic translation, get real-time museum assistant guidance, and contribute to Android's intelligence system with trip management functions through [AppFunctions](https://d.android.com/ai/appfunctions).
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JetPacker provides users with powerful tools to manage their upcoming trips, build out rich itineraries, record voice notes, manage travel expenses, generate on-device "Trip Summaries and Tips", generate AI reviews, chat with hotel staff via automatic translation, get real-time museum assistant guidance, coordinate reservations with an AI Booking Assistant using Jetpack A2UI, and contribute to Android's intelligence system with trip management functions through [AppFunctions](https://d.android.com/ai/appfunctions).
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## Architecture
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This project is built using modern Android architecture components:
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- **UI**: Jetpack Compose
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- **Agent-Driven UI**: Jetpack A2UI (`androidx.a2ui`) Compose renderer
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- **Dependency Injection**: Dagger/Hilt
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- **Local Persistence**: Room Database
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- **State Management**: ViewModels with StateFlow
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- **`:feature:trip:itinerary:enrichment`**: On-device AI summaries and tips (`TripSummaryAndTipsCard`) and dynamic daily theme generators.
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- **`:feature:trip:expenses`**: Expense tracking screen and automated receipt parser.
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- **`:feature:trip:voice_notes`**: Audio voice note recorder and real-time speech-to-text transcription screen.
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- **`:feature:trip:booking_assistant`**: Booking Assistant interactive agent interface rendered with Jetpack A2UI.
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## Getting Started
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./gradlew test
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```
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### Running the Booking Assistant Server
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JetPacker uses a Python-based Server-Sent Events (SSE) server powered by Google ADK to coordinate the booking agents. To run the booking assistant backend locally:
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```bash
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# Navigate to the server directory
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cd server
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# Install dependencies
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pip install -r requirements.txt
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# Run the server
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uvicorn main:app --host 0.0.0.0 --port 8000
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```
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Alternatively, run with Docker:
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```bash
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docker build -t jetpacker-server .
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docker run -p 8080:8080 jetpacker-server
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```
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## On-Device AI Features
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JetPacker integrates local on-device AI capabilities using ML Kit. These features run entirely on-device and can be toggled or customized in `android/core/flags/src/main/kotlin/com/example/jetpacker/core/flags/FeatureFlags.kt`:
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- **ENABLE_TRIP_SUMMARY_AND_TIPS**: Generates an on-device card summary of the current trip using ML Kit GenAI Prompt.
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- **ENABLE_MUSEUM_ASSISTANT**: Museum Assistant chatbot with URL, Maps, and Search grounding (uses Gemini 3.5 flash-lite).
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- **ENABLE_REVIEW_GENERATION**: Topic-selected review generator (uses Gemini 3.5 flash-lite on-device with cloud fallback).
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- **Hotel Support Chat**: Receives hotel receptionist assistance with real-time ML Kit + Gemini translation.
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- **Booking Assistant**: Parallel multi-agent travel coordinator providing dynamic interactive booking cards rendered via Jetpack A2UI with Cloud Run SSE backend streaming.
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## AppFunctions Integration
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JetPacker uses Android's [**AppFunctions**](https://d.android.com/ai/appfunctions) library (`androidx.appfunctions`) in `:feature:appfunctions` to contribute to Android's intelligence system with structured travel actions and data queries via `JetPackerAppFunctionService`:

‎jetpacker/android/app/build.gradle.kts‎

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* limitations under the License.
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*/
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plugins {
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alias(libs.plugins.android.application)
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alias(libs.plugins.kotlin.compose)
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android {
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namespace = "com.example.jetpacker"
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compileSdk {
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version = release(libs.versions.compileSdk.get().toInt()) {
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minorApiLevel = libs.versions.compileSdkMinor.get().toInt()
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}
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version =
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release(libs.versions.compileSdk.get().toInt()) {
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minorApiLevel = libs.versions.compileSdkMinor.get().toInt()
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}
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}
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defaultConfig {
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}
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packaging {
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jniLibs {
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useLegacyPackaging = false
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}
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jniLibs { useLegacyPackaging = false }
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resources {
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excludes += "META-INF/DEPENDENCIES"
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excludes += "META-INF/LICENSE"
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implementation(project(":data:itinerary"))
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implementation(project(":data:trips"))
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implementation(project(":feature:appfunctions"))
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implementation(libs.androidx.appfunctions)
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implementation(project(":feature:create_trip"))
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implementation(project(":feature:detail"))
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implementation(project(":feature:detail:museum_assistant"))
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implementation(project(":feature:trip:voice_notes"))
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implementation(project(":feature:trip:expenses"))
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implementation(project(":feature:trip:itinerary:enrichment"))
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implementation(project(":feature:trip:booking_assistant"))
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implementation(libs.androidx.activity.compose)
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implementation(libs.androidx.camera.camera2)
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implementation(libs.androidx.camera.core)

‎jetpacker/android/app/src/main/AndroidManifest.xml‎

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android:label="@string/app_name"
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android:supportsRtl="true"
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android:theme="@style/Theme.JetPacker"
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android:usesCleartextTraffic="false">
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android:usesCleartextTraffic="true">
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<activity
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android:name=".MainActivity"
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android:exported="true"

‎jetpacker/android/core/flags/src/main/kotlin/com/example/jetpacker/core/flags/FeatureFlags.kt‎

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const val KEY_ENABLE_MUSEUM_ASSISTANT = "enable_museum_assistant"
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const val KEY_ENABLE_URL_GROUNDING = "enable_url_grounding"
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const val KEY_ENABLE_SEARCH_GROUNDING = "enable_search_grounding"
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const val KEY_ENABLE_BOOKING_ASSISTANT = "enable_booking_assistant"
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private var appContext: Context? = null
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val ENABLE_SEARCH_GROUNDING: Boolean
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get() = readFlag(KEY_ENABLE_SEARCH_GROUNDING, true)
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val ENABLE_BOOKING_ASSISTANT: Boolean
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get() = readFlag(KEY_ENABLE_BOOKING_ASSISTANT, true)
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private fun readLongFlag(keyName: String, defaultValue: Long): Long {
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val context = appContext ?: return defaultValue
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return context

‎jetpacker/android/feature/trip/booking_assistant/build.gradle.kts‎

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/*
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* Copyright 2026 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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plugins {
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alias(libs.plugins.android.library)
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alias(libs.plugins.kotlin.compose)
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alias(libs.plugins.hilt.android)
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alias(libs.plugins.google.devtools.ksp)
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}
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android {
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namespace = "com.example.jetpacker.feature.booking_assistant"
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compileSdk = libs.versions.compileSdk.get().toInt()
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defaultConfig { minSdk = libs.versions.minSdk.get().toInt() }
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compileOptions {
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sourceCompatibility = JavaVersion.VERSION_17
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targetCompatibility = JavaVersion.VERSION_17
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}
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buildFeatures { compose = true }
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}
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dependencies {
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implementation(libs.androidx.core.ktx)
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implementation(project(":core:ui"))
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implementation(project(":core:flags"))
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implementation(project(":data:itinerary"))
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implementation(project(":data:trips"))
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implementation(platform(libs.androidx.compose.bom))
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implementation(libs.androidx.compose.material3)
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implementation(libs.androidx.compose.material.icons.core)
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implementation(libs.androidx.compose.material.icons.extended)
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implementation(libs.androidx.compose.ui.tooling.preview)
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debugImplementation(libs.androidx.compose.ui.tooling)
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implementation(libs.androidx.compose.ui)
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implementation(libs.androidx.lifecycle.viewmodel.compose)
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implementation(libs.androidx.lifecycle.runtime.compose)
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implementation(libs.androidx.hilt.navigation.compose)
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implementation(libs.hilt.android)
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"ksp"(libs.hilt.compiler)
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// A2UI Compose Renderer (Jetpack snapshot build 16368166)
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implementation(libs.androidx.a2ui.model)
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implementation(libs.androidx.a2ui.compose.runtime)
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implementation(libs.androidx.a2ui.compose.ui)
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implementation(libs.androidx.compose.material3.a2ui)
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// Cloud Run backend streaming
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implementation(libs.okhttp)
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implementation(platform(libs.firebase.bom))
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implementation(libs.firebase.auth.ktx)
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implementation(libs.kotlinx.coroutines.play.services)
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}
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kotlin { jvmToolchain(17) }

‎jetpacker/android/feature/trip/booking_assistant/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!--
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Copyright 2026 The Android Open Source Project
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.example.jetpacker.feature.booking_assistant" />

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