Document Split-view

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/*
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 *   Copyright © 2014-2026 PSPDFKit GmbH. All rights reserved.
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 *
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 *   The PSPDFKit Sample applications are licensed with a modified BSD license.
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 *   Please see License for details. This notice may not be removed from this file.
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 */
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package com.pspdfkit.catalog.examples.java;
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import android.content.Context;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.Bundle;
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import androidx.annotation.NonNull;
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import androidx.appcompat.app.AppCompatActivity;
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import com.pspdfkit.catalog.R;
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import com.pspdfkit.catalog.SdkExample;
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import com.pspdfkit.catalog.tasks.ExtractAssetTask;
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import com.pspdfkit.configuration.PdfConfiguration;
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import com.pspdfkit.configuration.activity.PdfActivityConfiguration;
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import com.pspdfkit.listeners.DocumentListener;
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import com.pspdfkit.ui.PdfFragment;
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import com.pspdfkit.ui.PdfUiFragment;
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import com.pspdfkit.ui.PdfUiFragmentBuilder;
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import java.io.File;
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import java.util.ArrayList;
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import java.util.List;
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/**
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 * This example shows how to use two {@link PdfFragment} instances inside a single custom activity.
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 */
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public class SplitDocumentExample extends SdkExample {
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    public SplitDocumentExample(final Context context) {
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        super(context, R.string.splitDocumentExampleTitle, R.string.splitDocumentExampleDescription);
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    }
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    @Override
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    public void launchExample(@NonNull Context context, @NonNull PdfActivityConfiguration.Builder configuration) {
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        final Intent intent = new Intent(context, SplitDocumentActivity.class);
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        context.startActivity(intent);
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    }
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    public static class SplitDocumentActivity extends AppCompatActivity
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            implements ExtractAssetTask.OnDocumentExtractedListener {
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        private List<DocumentListener> listeners = new ArrayList<>(2);
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        @Override
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        protected void onCreate(Bundle savedInstanceState) {
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            super.onCreate(savedInstanceState);
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            // Set the custom activity layout which is going to hold our side-by-side fragments.
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            setContentView(R.layout.activity_split_document);
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            // This example uses a PDF document from the app's assets. Before loading it to the
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            // fragments we extract it
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            // to the internal device storage.
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            ExtractAssetTask.extract(SdkExample.WELCOME_DOC, getString(R.string.splitDocumentExampleTitle), this, this);
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        }
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        /**
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         * This method is called after {@link ExtractAssetTask} has prepared the example's PDF document.
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         * Here we set up our two fragments.
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         */
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        @Override
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        public void onDocumentExtracted(@NonNull File documentFile) {
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            // We create a plain configuration, providing our license, but without any specific
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            // settings.
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            final PdfConfiguration configuration = new PdfConfiguration.Builder().build();
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            final Uri documentUri = Uri.fromFile(documentFile);
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            setupFragment(R.id.fragmentContainer1, configuration, documentUri, "PdfViewer1");
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            setupFragment(R.id.fragmentContainer2, configuration, documentUri, "PdfViewer2");
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        }
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        private void setupFragment(
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                int fragmentContainerId,
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                final PdfConfiguration configuration,
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                Uri documentUri,
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                @NonNull String pdfFragmentTag) {
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            // Check if the fragment already exists in our layout, using the given fragmentContainerId.
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            // This is the case if the
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            // activity was recreated (e.g. due to an orientation change).
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            PdfUiFragment fragment = (PdfUiFragment) getSupportFragmentManager().findFragmentById(fragmentContainerId);
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            // If no fragment was found in the layout we create a new one and place it in the layout.
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            if (fragment == null) {
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                fragment = PdfUiFragmentBuilder.fromUri(this, documentUri)
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                        .configuration(new PdfActivityConfiguration.Builder(this)
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                                .configuration(configuration)
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                                .build())
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                        .pdfFragmentTag(pdfFragmentTag)
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                        .build();
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                getSupportFragmentManager()
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                        .beginTransaction()
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                        .replace(fragmentContainerId, fragment)
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                        .commit();
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            }
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        }
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    }
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}