Draw annotation in PDF using blend mode in Java for Android

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/*
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 *   Copyright © 2018-2025 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 androidx.annotation.NonNull;
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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.examples.java.activities.AnnotationOverlayActivity;
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import com.pspdfkit.catalog.tasks.ExtractAssetTask;
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import com.pspdfkit.configuration.activity.PdfActivityConfiguration;
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import com.pspdfkit.ui.PdfActivityIntentBuilder;
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/** Showcases how to display annotations in overlay mode. */
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public class AnnotationOverlayExample extends SdkExample {
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    public AnnotationOverlayExample(@NonNull final Context context) {
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        super(
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                context.getString(R.string.annotationOverlayExampleTitle),
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                context.getString(R.string.annotationOverlayExampleDescription));
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    }
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    @Override
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    public void launchExample(
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            @NonNull final Context context, @NonNull final PdfActivityConfiguration.Builder configuration) {
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        // Extract the document from the assets.
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        ExtractAssetTask.extract(ANNOTATIONS_EXAMPLE, getTitle(), context, documentFile -> {
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            // To start the example create a launch intent using the builder.
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            final Intent intent = PdfActivityIntentBuilder.fromUri(context, Uri.fromFile(documentFile))
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                    .configuration(configuration.build())
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                    .activityClass(AnnotationOverlayActivity.class)
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                    .build();
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            context.startActivity(intent);
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        });
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    }
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}