1. Define executors for each resource class

Sometimes you need to quickly change the resource class you use on your job’s executor. For example, you could need to do that to measure the performance impact or because you need more memory/CPU.

You can simplify those changes by defining one executor per resource class. Each executor could have for example custom GRADLE_OPTS defined.

references:  android_config: &android_config
    working_directory: "/path"
    docker:
      - image: circleci/android:api-30executors:  android_executor_small:
    <<: *android_config
    resource_class: small
    GRADLE_OPTS: -Dorg.gradle.jvmargs="-Xmx2g -XX:MaxPermSize=2g"  android_executor_medium:
    <<: *android_config
    resource_class: medium
    GRADLE_OPTS: -Dorg.gradle.jvmargs="-Xmx4g -XX:MaxPermSize=4g"  android_executor_medium_plus:
    <<: *android_config
    resource_class: medium+
    GRADLE_OPTS: -Dorg.gradle.jvmargs="-Xmx6g -XX:MaxPermSize=6g"

2. Unify Gradle user home path between different docker images

Not all the docker images use the same default user home path. Then, the Gradle user's home path can change between jobs. This can cause problems when saving/restoring caches on jobs with different home paths. …

Jetpack is a set of libraries, tools, and guidance to help you write high-quality apps more easily. Jetpack makes coding easier through best practices, limiting boilerplate code, and simplifying complex tasks. All with the goal of enabling you to focus on the code that you really care about.

AndroidX is the package name for all the libraries within Jetpack. Think of AndroidX as the open-source project used to develop, test, version, and release Jetpack libraries.

Back at I/O 2018, Google announced that Support Library would be refactored into the AndroidX namespace, which was completed with Support Library 28 and the announcement of AndroidX 1.0. …

Flutter is Google’s UI toolkit for building beautiful, natively compiled applications for mobile, web, and desktop from a single codebase.

This is a summary of all the official development resources distributed across different channels.

Documentation

• Official site
• Flutter documentation

Source Code

• Github

Issue Tracker

• Github

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• flutterdev

Samples

• Flutter Examples

Medium

• Flutter Publication

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• Flutterdev Channel

Codelabs

2020

Navigation refers to the interactions that allow users to navigate across, into, and back out from the different pieces of content within your app. Android Jetpack’s Navigation component helps you implement navigation, from simple button clicks to more complex patterns, such as app bars and the navigation drawer. The Navigation component also ensures a consistent and predictable user experience by adhering to an established set of principles.

This is a summary of all the official development resources distributed across different channels.

Documentation

• Navigation Component
• Release Notes

Source Code

• Github

Issue Tracker

• Google Issue Tracker

Samples

• Navigation Basic sample: Shows how to use Navigation to perform navigation and deep linking in Kotlin. …

This article will explain why I believe that generating the BuildConfig class for Android library modules is a bad idea. It’s important to highlight that I am not talking about the app module BuildConfig, I am talking about all the other BuildConfig files generated by each android module.

First of all, I would like to clarify some terms, so you better understand this article:

• when I say debug code, I am talking about the code available on the local builds used by developers when they pick the debug variant. It is typically located at src/main & src/debug source sets.
• when I sayrelease code, I am talking about the code distributed on your release APK/AAB. It means the release variant. It is typically located at src/main & src/release source sets. …

Start learning this incredible programming language

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Kotlin in Action

• Authors: Dmitry Jemerov & Svetlana Isakova
• Year: 2019
• Buy on Amazon: Paperback

Android KTX is a set of Kotlin extensions that are included with Android Jetpack and other Android libraries. KTX extensions provide concise, idiomatic Kotlin to Jetpack, Android platform, and other APIs.

This is a summary of all the official development resources distributed across different channels.

To discover the best books to learn Kotlin, take a look at this story:

Documentation

• Android KTX

Issue Tracker

• Google Issue Tracker

Android Developers Blog

2018

Medium

2018

Youtube

2018

Write better Android apps faster with Kotlin. Kotlin is a modern statically typed programming language that helps boost productivity, developer satisfaction, and code safety.

This is a summary of all the official development resources distributed across different channels.

For Kotlin Coroutines resources, please read this story. For Android KTX resources, read this.

To discover the best books to learn Kotlin, take a look at this story:

Documentation

• Official Site
• Develop Android apps with Kotlin

Source Code

• Github

Blog

• Official Kotlin Blog

Forum

• Kotlin Discussions

Slack

• Kotlin Slack

Issue Tracker

• Github

Samples

• Learn Kotlin by Example

Android Developers Blog

2020

2019