--- title: "AI Assistant (Multiple Documents, ViewPager)" canonical_url: "https://www.nutrient.io/guides/android/samples/ai-assistant-multiple-documents-viewpager-kotlin/" md_url: "https://www.nutrient.io/guides/android/samples/ai-assistant-multiple-documents-viewpager-kotlin.md" last_updated: "2026-05-15T19:10:04.916Z" description: "AI-powered document chat across multiple documents using ViewPager2 and PdfFragment. Requires the AI Assistant demo server running locally." --- # AI Assistant (Multiple Documents, ViewPager) AI-powered document chat across multiple documents using ViewPager2 and PdfFragment. Requires the AI Assistant demo server running locally. [Get Started](https://www.nutrient.io/sdk/android/getting-started.md) [All Samples](https://www.nutrient.io/guides/android/samples.md) [Download](https://www.nutrient.io/guides/android/downloads.md) [Launch Demo](https://www.nutrient.io/demo/) --- ```kotlin /* * Copyright © 2025-2026 PSPDFKit GmbH. All rights reserved. * * The PSPDFKit Sample applications are licensed with a modified BSD license. * Please see License for details. This notice may not be removed from this file. */ package com.pspdfkit.catalog.examples.kotlin import android.content.Context import android.content.Intent import android.graphics.RectF import android.os.Bundle import androidx.appcompat.app.AppCompatActivity import androidx.appcompat.widget.Toolbar import androidx.fragment.app.Fragment import androidx.viewpager2.adapter.FragmentStateAdapter import androidx.viewpager2.widget.ViewPager2 import com.google.android.material.tabs.TabLayoutMediator import com.pspdfkit.ai.showAiAssistant import com.pspdfkit.catalog.R import com.pspdfkit.catalog.SdkExample import com.pspdfkit.catalog.SdkExample.Companion.WELCOME_DOC import com.pspdfkit.catalog.examples.kotlin.AiAssistantComposeActivity.Companion.PREFERENCES_NAME import com.pspdfkit.catalog.examples.kotlin.AiAssistantComposeActivity.Companion.PREF_AI_IP_ADDRESS import com.pspdfkit.catalog.examples.kotlin.AiAssistantViewPagerActivity.Companion.EXTRA_CONFIGURATION import com.pspdfkit.catalog.utils.JwtGenerator import com.pspdfkit.configuration.PdfConfiguration import com.pspdfkit.configuration.activity.PdfActivityConfiguration import com.pspdfkit.document.providers.AssetDataProvider import com.pspdfkit.document.providers.getDataProviderFromDocumentSource import com.pspdfkit.ui.DocumentDescriptor import com.pspdfkit.ui.PdfFragment import com.pspdfkit.utils.getSupportParcelableExtra import io.nutrient.domain.ai.AiAssistant import io.nutrient.domain.ai.AiAssistantProvider /** * Shows how to implement AI Assistant chat supporting multiple documents analysis and interaction inside a ViewPager. */ class AiAssistantViewPagerExample(context: Context) : SdkExample( context, R.string.aiAssistantViewPagerExampleTitle, R.string.aiAssistantViewPagerExampleDescription, ) { override val launchRequirements = setOf(SdkExample.LaunchRequirement.AI_ASSISTANT_SERVER) override fun launchExample(context: Context, configuration: PdfActivityConfiguration.Builder) { val intent = Intent(context, AiAssistantViewPagerActivity::class.java) configuration.setAiAssistantEnabled(true) intent.putExtra( EXTRA_CONFIGURATION, configuration.build().configuration, ) context.startActivity(intent) } } class AiAssistantViewPagerActivity : AppCompatActivity(), AiAssistantProvider { private lateinit var pager: ViewPager2 private lateinit var fragmentAdapter: ViewPagerPdfFragmentAdapter private var selectedPage = 0 private val sessionId = AiAssistantViewPagerActivity::class.java.simpleName var ipAddressValue = "" override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_view_pager_ai_assistant) findViewById(R.id.main_toolbar).let { it.setOnMenuItemClickListener { _ -> showAiAssistant(this@AiAssistantViewPagerActivity) true } } val preferences = getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE) ipAddressValue = preferences.getString(PREF_AI_IP_ADDRESS, "")?: "" fragmentAdapter = ViewPagerPdfFragmentAdapter(this@AiAssistantViewPagerActivity, documentDescriptors) pager = findViewById(R.id.view_pager).apply { this.adapter = fragmentAdapter isUserInputEnabled = false registerOnPageChangeCallback( object : ViewPager2.OnPageChangeCallback() { override fun onPageSelected(position: Int) { super.onPageSelected(position) selectedPage = position // Save the selected page. } override fun onPageScrollStateChanged(state: Int) { super.onPageScrollStateChanged(state) // Refresh the fragment when the user stops scrolling. if (state == 0) { supportFragmentManager.findFragmentByTag("f$selectedPage")?.let { if (it is PdfFragment) it.refreshPages() } } } }, ) } TabLayoutMediator(findViewById(R.id.tab_layout), pager) { tab, position -> tab.text = "Tab ${position + 1}" }.attach() } companion object { val assetFiles = listOf(WELCOME_DOC, "Scientific-paper.pdf", "Teacher.pdf", "The-Cosmic-Context-for-Life.pdf") internal const val EXTRA_CONFIGURATION = "Nutrient.AIAssistantViewPagerActivity.configuration" } var assistant: AiAssistant? = null override fun getAiAssistant(): AiAssistant = assistant?: initialiseAiAssistant().also { assistant = it } val documentDescriptors = assetFiles.map { DocumentDescriptor.fromDataProviders(listOf(AssetDataProvider(it)), listOf(), listOf()) } fun initialiseAiAssistant(): AiAssistant = com.pspdfkit.ai.createAiAssistant( context = this, documentsDescriptors = documentDescriptors, serverUrl = "http://$ipAddressValue:4000", sessionId = sessionId, jwtToken = { documentIds -> JwtGenerator.generateJwtToken( this@AiAssistantViewPagerActivity, claims = mapOf( "document_ids" to documentIds, "session_ids" to listOf(sessionId), "request_limit" to mapOf( "requests" to 160, "time_period_s" to 1000 * 60 * 10, ), ), ) }, ) @OptIn(ExperimentalStdlibApi::class) override fun navigateTo(documentRect: List, pageIndex: Int, documentIndex: Int) { val fragment = fragmentAdapter.fragments[documentIndex] pager.setCurrentItem(documentIndex, true) fragment.highlight(this@AiAssistantViewPagerActivity, documentRect, pageIndex) } } /** Minimal [FragmentStateAdapter] to provide [PdfFragment] for each page. */ class ViewPagerPdfFragmentAdapter(val activity: AiAssistantViewPagerActivity, descriptors: List) : FragmentStateAdapter(activity) { val configuration = activity.intent.getSupportParcelableExtra(EXTRA_CONFIGURATION, PdfConfiguration::class.java)?: throw IllegalStateException("Activity Intent was missing configuration extra!") override fun getItemCount(): Int = fragments.size val fragments = descriptors.map { val dataProvider = it.documentSource.getDataProviderFromDocumentSource() PdfFragment.newInstance(dataProvider, null, configuration) } override fun createFragment(position: Int): Fragment = fragments[position] } ``` This code sample is an example that illustrates how to use our SDK. Please adapt it to your specific use case. --- ## Related pages - [Application Policy](/guides/android/samples/application-policy-kotlin.md) - [Custom Form Highlight Color](/guides/android/samples/custom-form-highlight-color-java.md) - [Custom Page Templates](/guides/android/samples/custom-page-templates-java.md) - [Digital Signature (Basic)](/guides/android/samples/digital-signature-basic-kotlin.md) - [Disabled Annotation Property](/guides/android/samples/disabled-annotation-property-java.md) - [Image Document](/guides/android/samples/image-document-kotlin.md) - [Compose Image Document](/guides/android/samples/compose-image-document-kotlin.md) - [Inline Multimedia](/guides/android/samples/inline-multimedia-kotlin.md) - [JavaScript Form Filling](/guides/android/samples/javascript-form-filling-kotlin.md) - [Overlay Visibility](/guides/android/samples/overlay-visibility-kotlin.md) - [PdfFragment](/guides/android/samples/pdffragment-kotlin.md) - [Reader View](/guides/android/samples/reader-view-kotlin.md) - 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