Archive

2022

DEVELOPMENT  |  Android • iOS • Cordova • Flutter • Ionic • React Native • Xamarin Cross-Platform Mobile Frameworks — An iOS Engineer's Perspective What I learned while working on cross-platform mobile frameworks.

DEVELOPMENT  |  Android • Tips How to Load OBJ Files with MTL in Android Loading .obj files with .mtl using Three.js in Android.

PRODUCTS  |  Android • Releases PSPDFKit 8.2 for Android Adds Cloud Annotation Tool PSPDFKit 8.2 for Android adds a dedicated tool to create cloud annotations, support for bleed and trim boxes, downloadable unstripped NDK symbols, and more.

BLOG  |  Android • Kotlin • Insights Java-to-Kotlin Conversion Best Practices This blog post provides a few handy tips for performing Java-to-Kotlin conversion.

TUTORIALS  |  Android • How To • Signing How to Programmatically Stamp and Digitally Sign a Document on Android This post shows how to use the PSPDFKit 8 for Android Electronic Signatures and Digital Signatures components to digitally stamp and sign a document.

TUTORIALS  |  Flutter • Android • iOS • How To How to Download and Display a PDF Document in Flutter with PSPDFKit A tutorial explaining how to download and display a PDF document in Flutter using PSPDFKit.

DEVELOPMENT  |  Android • Kotlin • Jetpack Compose • Insights How We Expose Jetpack Compose APIs A few lessons we learned about API design for modern Android.

2021

DEVELOPMENT  |  Android • Kotlin • Tips Autosizing Fonts for Android EditTexts Transfer Android's TextView autosizing capability to EditTexts

PRODUCTS  |  Android • Releases PSPDFKit 8 for Android Adds Electronic Signatures and Jetpack Compose Introducing PSPDFKit 8 for Android — with Electronic Signatures, support for Jetpack Compose apps, and many other improvements.

DEVELOPMENT  |  Android • Kotlin • Jetpack Compose • UI/UX Introducing Jetpack Compose Support The Android PDF SDK you know and love now supports Jetpack Compose!

DEVELOPMENT  |  Android • Productivity • git Refactoring Git Branches with Interactive Rebase and Autosquash in Android Studio A primer on using Git's interactive rebase feature, and how to use it within Android Studio to housekeep commits.

TUTORIALS  |  Android • Kotlin • How To • Jetpack Compose • PDF Opening a PDF in a Jetpack Compose Application How to open a PDF in a Jetpack Compose application.

PRODUCTS  |  Android • Releases PSPDFKit 7 for Android Adds Real-Time Communication with Instant Comments Introducing PSPDFKit 7 for Android — with Instant Comments and many other improvements.

TUTORIALS  |  Android • iOS • React Native • JavaScript • How To How to Open a PDF in React Native Using the Document Picker A video tutorial about how to open a PDF in React Native using the document browser.

TUTORIALS  |  Android • Kotlin • Java • How To Creating and Filling Out Forms Programmatically on Android This blog post shows how to create and fill out forms programmatically on Android.

DEVELOPMENT  |  Android • Kotlin Avoiding Primitive Type Saturation in Kotlin Enough of fun getString(string: String): String – let's make greater use of Kotlin's powerful type system.

DEVELOPMENT  |  Android • Web • Testing • UI/UX • Insights Why Should You Care about Manual Testing? How to approach manual testing pragmatically for quality products you can be proud of.

TUTORIALS  |  Android • Kotlin • PDF • How To • Annotations Embedding Audio in PDFs: Sound Annotations in Depth An introduction to PDF sound annotations.

TUTORIALS  |  Android • Flutter • Java • How To How to Customize Our Flutter PDF SDK How to fork and modify the PSPDFKit Flutter PDF SDK for your own application.

TUTORIALS  |  Android • Kotlin • How To Converting an Image to PDF in Kotlin Learn how to convert an image to PDF using PSPDFKit for Android and Kotlin.

PRODUCTS  |  Android • Releases PSPDFKit 6.6 for Android Introducing PSPDFKit 6.6 for Android — including support for bold and italic fonts, annotation selection UI customization, and many optimizations.

TUTORIALS  |  Android • Kotlin • Security • Signing • PDF • How To Digital Signing on Android How digital signing and contained signatures on Android work.

TUTORIALS  |  Android • Kotlin • How To Performing OCR on Android A post showing how to use PSPDFKit for Android to perform OCR on scanned documents.

2020

DEVELOPMENT  |  Android • Kotlin • Insights How Updating to Kotlin 1.4 Broke Our Linter Rules How the update to Android Gradle plugin 4.1 and Kotlin 1.4 can break custom linter rules, and how to fix it.

TUTORIALS  |  Android • Kotlin • How To • Redaction How to Create Multiple Redactions with Search on Android Learn how you can leverage the redaction functionality of PSPDFKit for Android to effectively remove text patterns from documents.

TUTORIALS  |  Android • How To • Kotlin Adding a Persistent Annotation Sidebar Learn how to put together all the components PSPDFKit provides to build a custom Annotation UI.

PRODUCTS  |  Android • iOS • Web • Java • .NET • Components Optical Character Recognition in Scanned PDFs An overview of how OCR can enhance scanned documents to speed up common operations. We explain what OCR is, why it's useful, and how it works.

PRODUCTS  |  Android • Releases PSPDFKit 6.5 for Android: Android PDF Library Introducing PSPDFKit 6.5 for Android — including our new OCR component, simplified integration, and open source examples.

PRODUCTS  |  Android • Releases PSPDFKit 6.4 for Android Introducing PSPDFKit 6.4 for Android — including our new Reader View component and Office Files support.

DEVELOPMENT  |  Android • Kotlin • Tips • Productivity Think First, Code Later A case study on how we design features and APIs for PSPDFKit for Android.

DEVELOPMENT  |  Android • Kotlin • Tips • Productivity • Testing How to Reduce Flakiness in Automated UI Testing on Android This blog post discusses tips and best practices on how to reduce flakiness in automated UI testing on Android.

PRODUCTS  |  Android • Releases PSPDFKit 6.3 for Android Introducing PSPDFKit 6.3 for Android — with several improvements for Kotlin users.

DEVELOPMENT  |  Android • Kotlin • Tips • UI/UX Change Android Themes Instantly Using the Circular Reveal Animation This blog post investigates how to achieve nice animations when changing themes.

PRODUCTS  |  Android • Releases PSPDFKit 6.2 for Android Introducing PSPDFKit 6.2 for Android — with HTML-to-PDF conversion and several improvements to code structure and documentation.

TUTORIALS  |  Android • Kotlin • PDF • How To Inserting an Image into a PDF on Android We provide a step-by-step explanation of how to insert an image into a PDF on Android.

DEVELOPMENT  |  Android • Java • Testing • Gradle Filtering Tests in Android A look at the android.support.test.filters library and what it provides you with.

2019

PRODUCTS  |  Android • Releases PSPDFKit 6.1 for Android Introducing PSPDFKit 6.1 for Android — with improvements to accessibility, availability of PDF page overlay views, support for custom document outlines, and more.

DEVELOPMENT  |  Android • Insights Our Journey from Genymotion to the Android Emulator How we migrated our Genymotion-based CI to an AVD.

TUTORIALS  |  Android • Kotlin • How To Persisting the Tabs State on Android A blog post describing how to persist the tabs state inside PdfActivity.

DEVELOPMENT  |  Android • Kotlin • Tips • Accessibility • Insights How We Improved Keyboard Navigation Accessibility in Our Android SDK A look at the steps we took to start improving the accessibility of our Android SDK.

TUTORIALS  |  Android • PDF • How To Convert a PDF to an Image on Android This article explains how to render your PDF files to images using both Android's built-in PDF libraries and PSPDFKit.

PRODUCTS  |  Android • Releases PSPDFKit 6 for Android PSPDFKit 6 for Android improves on performance and accessibility, auto-expands free text annotations, adds annotation z-index ordering and a new all-in-one fragment, and more.

DEVELOPMENT  |  Android • Tips The Android Drag-and-Drop Framework in Practice Using the Android drag-and-drop framework — from theory to implementation.

TUTORIALS  |  Android • Kotlin • PDF • How To Add a Watermark to a PDF on Android How to add a watermark to a PDF on Android.

DEVELOPMENT  |  Android • Java • Gradle • Insights Understanding the Gradle Build System In this article, we'll explore the Gradle build system, how it works, and why it is the new standard for building Android projects.

TUTORIALS  |  Android • Kotlin • PDF • How To Merge PDF Documents on Android We'll take a look at two ways to merge PDF documents on Android.

DEVELOPMENT  |  Android • iOS • macOS • Windows • C++ • Insights Challenges of Using Emojis with C++ In this article, we discuss the challenges of implementing your own custom emoji support in a cross-platform way.

DEVELOPMENT  |  Android • Kotlin • Java • Insights What Is an Intent? An overview of intents, their uses, and pitfalls to consider.

DEVELOPMENT  |  Android • Tips Dealing with Large Memory Requirements on Android This article provides tips for optimizing memory usage of your apps.

DEVELOPMENT  |  Android • Debugging NDK Debugging A set of tips for debugging native NDK code in Android apps.

DEVELOPMENT  |  Android • Kotlin • Tips How Do I Fix NetworkOnMainThreadException? A post detailing what NetworkOnMainThreadException is and how to prevent it.

DEVELOPMENT  |  Android • iOS • Web • PDF The Role of PSPDFKit as a PDF Processor How we fit into the PDF landscape.

DEVELOPMENT  |  Android • Java • Tips Performance Evaluation of Linked Lists Today we'll delve into the performance evaluation of linked lists, a controversial topic among many experienced developers, and try to understand why they trigger a warning in the Error Prone report.

PRODUCTS  |  Android • Releases PSPDFKit 5.5 for Android Introducing PSPDFKit 5.5 for Android — including a floating thumbnail bar, RTL document support, image stamp rotation, better performance, and more.

DEVELOPMENT  |  Android • Tips The Soft Keyboard on Android Tips for working with the soft keyboard on Android.

TUTORIALS  |  Android • Kotlin • PDF • How To Open a PDF in an Android App This article presents existing free or open source libraries for opening PDF files in Android apps.

DEVELOPMENT  |  Android • Kotlin • Tips Retaining Objects Using a Fragment An overview of how to use a fragment to retain objects during a configuration change.

TUTORIALS  |  Android • How To A Gentle Introduction to RxJS A short introduction to RxJS, highlighting the differences between traditional event-based JavaScript and the use of Observables.

DEVELOPMENT  |  Android • Java • Tips • Insights Problems with Nullability Annotations A look at some issues with Android's nullability annotations and how to fix them.

TUTORIALS  |  Android • Dart • Flutter • How To How to Open a PDF in Flutter using flutter_full_pdf_viewer A tutorial on how to open a PDF in Flutter.

DEVELOPMENT  |  Android • Tips Understanding Android Dimensions A post about existing Android dimensions, their purpose, and common conversion rules.

PRODUCTS  |  Android • Releases PSPDFKit 5.4 for Android Introducing PSPDFKit 5.4 for Android — featuring sound annotations, cloudy borders, a new color picker, a magnifier widget, and much more.

DEVELOPMENT  |  Android • Gradle Gradle Task Configuration Avoidance in Android Builds An overview of Gradle's task configuration avoidance APIs and how they are used by the Android build system.

DEVELOPMENT  |  Android • Tips How to Use Android App Bundles This blog post explains what Android App Bundles are and how to upload them to Google Play.

DEVELOPMENT  |  Android • Kotlin • Insights Kotlin Coroutines A look at Kotlin coroutines and how they compare to other solutions for concurrency.

DEVELOPMENT  |  Android • Java Java 8 in Android Apps This article explains how to enable Java 8 features in an Android app and gives an overview of the available Java 8 features.

TUTORIALS  |  iOS • Android • Flutter • How To Getting Started with PSPDFKit for Flutter How to get started with PSPDFKit for Flutter.

DEVELOPMENT  |  Android • Java • Tips Handling Nullability in Your Code A brief excursion into the Java type system, nullability, and remedies for the billion-dollar mistake.

PRODUCTS  |  Android • Releases PSPDFKit 5.3 for Android Introducing PSPDFKit 5.3 for Android — featuring improved ink annotation tools, custom annotation data support, performance improvements, and much more.

DEVELOPMENT  |  Android • Kotlin • Tips • Jetpack Compose Using ViewModels to Retain State on Android How to use Android's ViewModel class to retain complex objects across configuration changes.

DEVELOPMENT  |  Android • Tips What Are Configuration Changes? An overview of configuration changes on Android.

DEVELOPMENT  |  Android • iOS • Windows • PDF • Tips • Insights Incremental and Full Save in PDFs This article goes into what's involved when incrementally or fully saving a PDF, and why it matters.

DEVELOPMENT  |  Android • Kotlin • JavaScript • React Native Sharing Business Logic Using React Native Not only can React Native be used to provide the UI for your application, but it is also a convenient way to share business logic.

DEVELOPMENT  |  Android • Debugging Android Debug Bridge Tricks and Tips An introduction to Android Debug Bridge (adb) and an overview of some tricks.

DEVELOPMENT  |  Android • Kotlin • Tips • Instant How to Test REST API Clients in Android Apps This article shows how we built simple and flexible integration tests for PSPDFKit Instant that are using a custom abstraction layer on top of an OkHttp mocked web server.

PRODUCTS  |  Android • Releases PSPDFKit 5.2 for Android Introducing PSPDFKit 5.2 for Android — featuring multithreaded rendering, new signature APIs, a smaller library size, and many more improvements.

DEVELOPMENT  |  Android • Java • Tips Saving the Activity State An overview of how to make sure your activity state is saved.

DEVELOPMENT  |  Android • Kotlin • Tips Using the Bottom Navigation View in Android An introduction to implementing bottom navigation in your app with a simple example that incorporates synced page switching as well.

DEVELOPMENT  |  Android • Tips • Debugging Inspecting APK Files This article discusses the basics of Android reverse engineering using the Apktool, smali, and Java decompilers.

2018

PRODUCTS  |  Android • Releases PSPDFKit 5.1 for Android Introducing PSPDFKit 5.1 for Android — featuring a new free-form redaction tool, AndroidX support, and many more improvements.

DEVELOPMENT  |  Android External Storage Permissions on Android An exploration of how permissions work, starting from a high level and working down to the lower lever managed by FUSE, the native Android module that interacts with the file system.

DEVELOPMENT  |  Android • Tips How to Increase the Logcat Buffer Size Don't lose your logs. Increase your logcat buffer!

DEVELOPMENT  |  Android • Testing Rendering Tests Using Robolectric Rendering tests using Robolectric with a custom bitmap shadow.

PRODUCTS  |  Android • Releases PSPDFKit 5 for Android Introducing PSPDFKit 5 for Android — featuring the new Redaction and Comparison components, many improvements to existing APIs, and full support for Android 9 Pie.

DEVELOPMENT  |  Android • Kotlin • Insights What Are Kotlin Contracts and How Are They Useful? An overview of the experimental Kotlin Contracts API.

DEVELOPMENT  |  Android • Tips Using Paths to Draw Shapes with Borders How to use a flexible path API to draw complex shapes with borders.

PRODUCTS  |  iOS • Android • Web • Tips Examples for Using Our Frameworks Here at PSPDFKit, we believe doing practical work is the best way to learn things, so we decided to create a few example apps to help customers explore our framework.

PRODUCTS  |  Android • Releases PSPDFKit 4.8 for Android Introducing PSPDFKit 4.8 for Android — with document tabs, a pop-up toolbar, custom free text fonts, a new Document Editor API, and more.

TUTORIALS  |  React Native • Android • How To Advanced Techniques for React Native UI Components An outline of some of the more advanced techniques you can apply to React Native UI components on Android.

DEVELOPMENT  |  Android • RxJava • Kotlin • Tips RxJava for Multi-Level Data Retrieval RxJava can be useful for many things, and in this post, we’ll have a look at how to use it to add offline support to your app.

DEVELOPMENT  |  Flutter • Android • iOS • Insights How I Got Started with Flutter A short review of Flutter from a mobile developer’s standpoint.

DEVELOPMENT  |  Android • Kotlin • Tips Moving Your Gradle Build Scripts to Kotlin Another take on writing your project's Gradle build files in pure Kotlin code.

PRODUCTS  |  Android • Releases PSPDFKit 4.7 for Android Introducing PSPDFKit 4.7 for Android — featuring JavaScript support, a document info view, free text callouts, and more.

DEVELOPMENT  |  Android • Tips Tips for Designing an Android Library We take a look at some of the things you should keep in mind when designing an Android library.

TUTORIALS  |  Android • Kotlin • How To • PDF Ways to Create a PDF on Android We look at the different ways of creating a PDF on Android.

TUTORIALS  |  iOS • Android • macOS • How To How to Embed Files Using File Annotations We're taking a look at how to embed files using file annotations.

PRODUCTS  |  Android • Releases PSPDFKit 4.6 for Android Introducing PSPDFKit 4.6 for Android — featuring annotation & page rotation, non-destructive image documents, system clipboard images, file annotations, custom page content and more.

DEVELOPMENT  |  Android • Insights Rendering PDF Previews An overview of how to render PDF previews.

DEVELOPMENT  |  Android • Java • Kotlin • Tips Async Stacktraces in Android Studio How to create asynchronous stacktraces in Android Studio and IntelliJ.

DEVELOPMENT  |  Android • RxJava • Kotlin • Insights RxJava Is Async yet Blocking An explanation of why RxJava is both asynchronous and blocking.

DEVELOPMENT  |  Android • Debugging • Productivity The Subtle Art of Real-Time Debugging With Android Studio Debugging in real time with Android Studio.

DEVELOPMENT  |  Android • Tips Hints for Beginners Navigating Around New Code We share some tips on how to navigate a new codebase.

DEVELOPMENT  |  iOS • Android • C++ • Objective-C Failable Methods with Djinni In this article, we have look at using result types to model failable computations in the Djinni IDL.

DEVELOPMENT  |  Android • Kotlin • Insights Using Kotlin to Make the PSPDFKit API Even Better Kotlin provides the ability to extend any class with new functionality, and we can use this to expand the PSPDFKit API.

PRODUCTS  |  Android • Releases PSPDFKit 4.4 for Android Today we're releasing PSPDFKit 4.4 for Android!

PRODUCTS  |  Android • React Native React Native UI Component for Android Introducing Android support for our native UI component for showing PDFs in a React Native app with PSPDFKit.

DEVELOPMENT  |  Android • Performance • UI/UX Rendering PDFs on Android How to handle rendering large amounts of bitmaps and maintain a slick UX while doing it.

PRODUCTS  |  Android • iOS Localization at PSPDFKit An overview of how localization is handled at PSPDFKit.

DEVELOPMENT  |  Android • Productivity • Tips Android Studio Shortcuts: How to Boost Your Productivity The best shortcuts for Android Studio. The most famous and the most underrated.

PRODUCTS  |  Android • Releases PSPDFKit 4.3 for Android Today we're releasing PSPDFKit 4.3 for Android!

DEVELOPMENT  |  Android • Kotlin • Insights Simple Kotlin Tips for Beginners Useful tricks for beginners to start writing better code with Kotlin.

2017

TUTORIALS  |  iOS • Android • How To Use Vector Stamps Instead of Blurry Shapes Tips and tricks for using vector-based stamp annotations.

PRODUCTS  |  Android • Releases PSPDFKit 4.1 for Android Today we're releasing PSPDFKit 4.1 for Android!

DEVELOPMENT  |  Android • RxJava • Open Source Make Android Animations Reactive with VanGogh Android view animations powered by RxJava 2.

PRODUCTS  |  Android • Releases PSPDFKit 4.0 for Android Today we're releasing PSPDFKit 4.0 for Android!

DEVELOPMENT  |  Android • Kotlin • Java • Security Secure Media Playback on Android Picking smart defaults with security in mind when playing videos on Android.

PRODUCTS  |  Android • Releases PSPDFKit 3.3 for Android Today we're releasing PSPDFKit 3.3 for Android!

PRODUCTS  |  Android • Releases PSPDFKit 3.2 for Android Today we're releasing PSPDFKit 3.2 for Android! With a new night mode and scrolling settings, improved search and video annotation support.

DEVELOPMENT  |  Android • Java • UI/UX 50 Shaders of Android: Drawing on Canvas Low-level drawing and animation on Android using Canvas and powerful Shader classes.

PRODUCTS  |  Android • Releases PSPDFKit 3.1 for Android Today we're releasing PSPDFKit 3.1 for Android!

DEVELOPMENT  |  iOS • Android • Tips • UI/UX Creating Better User Experiences with Animations and Lottie Improving an app’s User Experience made easy by adding animations powered by Lottie.

PRODUCTS  |  Android • Releases PSPDFKit 3.0 for Android Today we're releasing PSPDFKit 3.0 for Android!

DEVELOPMENT  |  Android • Kotlin • RxJava • Tips Writing Concise Code with Kotlin and RxJava Tips and tricks how to write readable, concise, and beautiful code using the Kotlin language and RxJava.

DEVELOPMENT  |  Android • Tips • Debugging How to Fix a Bug, Blindfolded. This is a story about fixing a bug, even when all the tools go kaput.

PRODUCTS  |  Android • Releases PSPDFKit 2.9 for Android Today we're releasing PSPDFKit 2.9 for Android!

DEVELOPMENT  |  Android • iOS • Objective-C • C++ Super Fast Builds Using distcc How to dramatically shorten your build times with distcc.

2016

PRODUCTS  |  Android • Releases PSPDFKit 2.8 for Android Today we're releasing PSPDFKit 2.8 for Android!

DEVELOPMENT  |  Android • Kotlin • Java • Tips A clean status bar with Android System UI and QuickDemo How to enable Android's demo mode using a quick setting tile

DEVELOPMENT  |  Android • Java • Kotlin Restoring State in Android MVP Architecture State restoration is an important part of the Android framework, but we might encounter problems with it when implementing MVP architecture.

PRODUCTS  |  Android • Releases PSPDFKit 2.7 for Android Another month, another version of PSPDFKit for Android. Say hello to 2.7!

DEVELOPMENT  |  iOS • Android • Testing Running Tests with Clang's AddressSanitizer Clang has powerful sanitizers that are incredibly useful, so we collected our experiences using them between iOS, Android, and our C++ core to help you through some gotchas.

DEVELOPMENT  |  Android • Kotlin • RxJava • Tips Android animations powered by RxJava The purpose of this post is to show you how to combine RxJava features with animations on Android to create a great user interface without a lot of nested code.

PRODUCTS  |  Android • Releases PSPDFKit 2.6 for Android PSPDFKit continues its saga on Android with the 2.6 release and a host of new features and improvements! Check out this post to learn about the updated features.

PRODUCTS  |  Android • Releases PSPDFKit 2.5 for Android The PSPDFKit Android team has been working hard to bring you the newest release 2.5 of PSPDFKit for Android! Check out this post to learn about the updated features.

TUTORIALS  |  Android • Java • How To How to build a screen reader

PRODUCTS  |  Android • Releases PSPDFKit 2.4 for Android

DEVELOPMENT  |  Android • Java • UI/UX • Tips Keyboard Handling on Android

DEVELOPMENT  |  Android • Kotlin Kotlin-Ready Online Guides Our Guides received a large update – now with Kotlin usage examples.

PRODUCTS  |  Android • Releases PSPDFKit 2.2 for Android

DEVELOPMENT  |  Android • Insights The curious case of Android premultiplied alpha

PRODUCTS  |  Android • Releases PSPDFKit 2.1 for Android

2015

PRODUCTS  |  Android • Releases PSPDFKit 2 for Android Create and edit, Highlight, Underline, StrikeOut, Squiggle, Ink, Note, and FreeText annotations with PSPDFKit 2.0 for Android.

PRODUCTS  |  Android • Releases PSPDFKit 1.4 for Android

PRODUCTS  |  Android • Releases PSPDFKit 1.3 for Android

PRODUCTS  |  Android • Releases PSPDFKit 1.2 for Android