Kotlin Articles | Nutrient Blog

Reinhard Hafenscher

Shantanu Methikar

Digital signing on Android (2026)

How digital signing and contained signatures on Android work.

How to view PDFs on Android

Tomáš Šurín

How to view PDFs on Android

How to test REST API clients in Android apps

Tomáš Šurín

How to test REST API clients in Android apps

Jetpack Compose: The ultimate guide

Omar Talaat

Jetpack Compose: The ultimate guide

From Zero to AI: Building custom chat interfaces with Nutrient on Android

Akshay Sharma

From Zero to AI: Building custom chat interfaces with Nutrient on Android

Handling fatal errors in Android

Michael Kellner

Handling fatal errors in Android

Pairs and triples in Kotlin (and why you shouldn't use them)

Menil Vukovic

Pairs and triples in Kotlin (and why you shouldn't use them)

Opening a PDF in a Jetpack Compose application

William Barbosa

Opening a PDF in a Jetpack Compose application

Best PDF viewer for Android: How to create a PDF on Android

Hulya Masharipov

Best PDF viewer for Android: How to create a PDF on Android

Kotlin Non-Nullable Pitfall

Michael Kellner

Kotlin Non-Nullable Pitfall

Converting a PDF to an image in Java

Julian Grosshauser

Converting a PDF to an image in Java

Java PDF editor: How to programmatically edit PDFs using Java

Naeem Malik

Java PDF editor: How to programmatically edit PDFs using Java

Kotlin Context Receivers — A Preview

Michael Kellner

Kotlin Context Receivers — A Preview

Programmatically editing a PDF using Java

Amit Nayar

Programmatically editing a PDF using Java

Java-to-Kotlin Conversion Best Practices

Michael Kellner

Java-to-Kotlin Conversion Best Practices

How we expose Jetpack Compose APIs

William Barbosa

How we expose Jetpack Compose APIs

Autosizing Fonts for Android EditTexts

Michael Kellner

Autosizing Fonts for Android EditTexts

Introducing Jetpack Compose support

Gabriel Bunselmeyer

Introducing Jetpack Compose support

Creating and Filling Out Forms Programmatically on Android

Simone Arpe

Creating and Filling Out Forms Programmatically on Android

Avoiding Primitive Type Saturation in Kotlin

William Barbosa

Avoiding Primitive Type Saturation in Kotlin

Embedding Audio in PDFs: Sound Annotations in Depth

Tomáš Šurín

Embedding Audio in PDFs: Sound Annotations in Depth

Converting an Image to PDF in Kotlin

Reinhard Hafenscher

Converting an Image to PDF in Kotlin

Performing OCR on Android

Reinhard Hafenscher

Performing OCR on Android

How Updating to Kotlin 1.4 Broke Our Linter Rules

David Schreiber-Ranner

How Updating to Kotlin 1.4 Broke Our Linter Rules

How to Create Multiple Redactions with Search on Android

Tomáš Šurín

How to Create Multiple Redactions with Search on Android

Adding a persistent annotation sidebar

Reinhard Hafenscher

Adding a persistent annotation sidebar

Think First, Code Later

Tomáš Šurín

Think First, Code Later

How to Reduce Flakiness in Automated UI Testing on Android

Reinhard Hafenscher

How to Reduce Flakiness in Automated UI Testing on Android

Merge PDFs with Java and Kotlin

Nick Winder

Merge PDFs with Java and Kotlin

Change Android themes with circular animations

Simone Arpe

Change Android themes with circular animations

Inserting an Image into a PDF on Android

Reinhard Hafenscher

Inserting an Image into a PDF on Android

Persisting the Tabs State on Android

Tomáš Šurín

Persisting the Tabs State on Android

Improving keyboard accessibility in our Android SDK

Reinhard Hafenscher

Improving keyboard accessibility in our Android SDK

Add a watermark to a PDF on Android

Reinhard Hafenscher

Add a watermark to a PDF on Android

Merge PDF Documents on Android

Reinhard Hafenscher

Merge PDF Documents on Android

What Is an Intent?

Reinhard Hafenscher

What Is an Intent?

How Do I Fix NetworkOnMainThreadException?

Reinhard Hafenscher

How Do I Fix NetworkOnMainThreadException?

Retaining Objects Using a Fragment

Reinhard Hafenscher

Retaining Objects Using a Fragment

Kotlin Coroutines

Reinhard Hafenscher

Kotlin Coroutines

Using ViewModels to retain state on Android

Ivan Skoric

Using ViewModels to retain state on Android

Sharing Business Logic Using React Native

Reinhard Hafenscher

Sharing Business Logic Using React Native

Using the Bottom Navigation View in Android

Ivan Skoric

Using the Bottom Navigation View in Android

What are Kotlin contracts and how are they useful?

Anastasiia Zhuravleva

What are Kotlin contracts and how are they useful?

RxJava for Multi-Level Data Retrieval

Reinhard Hafenscher

RxJava for Multi-Level Data Retrieval

Moving Your Gradle Build Scripts to Kotlin

David Schreiber-Ranner

Moving Your Gradle Build Scripts to Kotlin

Async Stacktraces in Android Studio

David Schreiber-Ranner

Async Stacktraces in Android Studio

RxJava Is Async yet Blocking

David Schreiber-Ranner

RxJava Is Async yet Blocking

Using Kotlin to Make the PSPDFKit API Even Better

Reinhard Hafenscher

Using Kotlin to Make the PSPDFKit API Even Better

Simple Kotlin Tips for Beginners

Anastasiia Zhuravleva

Simple Kotlin Tips for Beginners

Secure Media Playback on Android

Ivan Skoric

Secure Media Playback on Android

Writing Concise Code with Kotlin and RxJava

David Schreiber-Ranner

Writing Concise Code with Kotlin and RxJava

A clean status bar with Android System UI and QuickDemo

David Schreiber‑Ranner

A clean status bar with Android System UI and QuickDemo

Restoring State in Android MVP Architecture

Ivan Skoric

Restoring State in Android MVP Architecture

Android animations powered by RxJava

Ivan Skoric

Android animations powered by RxJava

Kotlin-Ready Online Guides

David Schreiber-Ranner

Kotlin-Ready Online Guides