W3Schools is one of the most popular web development resources but it also has a dedicated section for Android development. It will take you from the very beginning to moderately advanced levels, with code examples in the middle. I don’t generally sift through on my local machine; rather, I peruse the Android source on Github’s website.

What is Android App Development?

• For your app to support multiple device configurations, it’s very important thatyou always provide default resources for each type of resource that your app uses.
• This tool is simple and elegant, allowing the user to plug in a number at any density (yeah, even tvdpi) and will calculate the value for any other density.
• At runtime, Androiddetects the current device configuration and loads the appropriateresources for your app.
• While uncommon, you might need access your original files and directories.
• For example, if your app supports several languages, always include a values/ directory (in which your strings are saved) without a language and region qualifier.
• They can explicitly opt-in to using the app’s default behavior in the aspect ratio settings.
• If you save this file as main.xml, it is compiled into a resource you can referenceas R.layout.main, but is actually an alias for the R.layout.main_ltrresource.

As well as introductory guides to Kotlin and Android Studio, it covers every single aspect of Android programming in forensic detail. We really enjoyed the guides to notifications, unit tests and reactive programming, but you’ll find all of them useful. To account for different window sizes and aspect ratios, use window size classes to drive layout behavior in a way that doesn’t require device-specific customizations. Apps should also be built with the assumption that window sizes will frequently change. It’s not necessary to build duplicate orientation-specific layouts – instead, ensure your existing UIs can re-layout well no matter what the window size is.

Android Developers

If you want to quickly learn to do something specific, or find a step-by-step tutorial for creating a video game/social app/whatever else, then searching on YouTube is often a good option. 👓 A curated list of awesome android learning resources for android app developers. Though this procedure is executed for each resource requested, the system optimizessome aspects of it. One such optimization is that once the device configuration is known, it mighteliminate alternative resources that can never match. For your app to support multiple device configurations, it’s very important thatyou always provide default resources for each type of resource that your app uses.

Update the app’s targeting and build with new APIs

The Python tutorial is essentially a series of screenshots, walking you through the foundations of the language, and the examples are relatable. Some tutorials will describe how to build complex coding jobs apps, the sort of projects you don’t come across everyday. What’s more, the Android resources have links to a whole bunch of legendary devs, including Ray Wenderlich, someone we singled out for special praise in our guide to iOS learning resources (link). As we mentioned at the top, the sheer breadth of devices means Android development is more complex than iOS.

• It makes it possible to create virtual Android devices for testing purposes.
• Apart from Java, IntelliJ IDEA integrates with other programming languages including Kotlin, Groovy, Scala, and others in case you would be requiring them for development.
• This sounds redundant, but can be very useful when using alternative resource.
• Kotlin is a modern statically typed language developed in parallel with Java but seeking to solve problems such as Java’s verbosity and issues with the use of nulls.
• This change will reduce fragmentation with behavior that better meets user expectations, and improves accessibility by respecting the user’s preferred orientation.
• Using simple and clear code, Kotlin includes elements of both object-oriented and functional programming, making it suitable for multi-platform programming.

Especially for those hoping to parlay their development skills over to full time, gainful employment, “self taught” is not a word that shows up regularly on job boards. Also see the keyboard configuration field,which indicates the primary text input method available. Also see the configuration fields hardKeyboardHidden and keyboardHidden, which indicate the visibility of a hardwarekeyboard and the visibility of any kind of keyboard (including software), respectively. For more information about how to handle different screen densities and how Androidmight scale your bitmaps to fit the current density, seeScreen compatibility overview. Also see the screenLayout configuration field,which indicates whether the screen is long. You call this when you are at the parent tag of the extra Mid/Senior Android developer (Kotlin) job tags, and it will return once all of the child tags have been parsed.

If you do, thensaving your files in res/ won’t work for you, because the only way to read a resource fromres/ is with the resource ID. You can also use the MCC alone, for example, to include country-specific legalresources in your app. If you need to specify based on the language only, then use thelanguage, script (optional), and region (optional) qualifier instead. If you use the MCC andMNC qualifier, do so with care and test that it works as expected.

If you’re overwhelmed by the options the above resources offer, you might find this Android development course on Great Learning useful. You don’t have to choose, as this is just one course that is one and a half hours long. However, we have found this list of free Android development courses on it that are mainly text and image-based, like those of Vogella. If you’re not big on video tutorials, Vogella might pique your interest as most of its courses are text and image-based. The site is pretty intuitive, and you’ll find it easy to navigate to what you’re looking for. The courses are in the form of videos, and you get tasks like quizzes to assess what you’ve learned at the end of it.

Once you externalize your app resources, you can access themusing resource IDs that are generated in your project’s R class.This document shows you how to group the resources in your Android project. It also shows you howto provide alternative resources for specific device configurations and then access them fromyour app code or other XML files. This change will reduce fragmentation with behavior that better meets user expectations, and improves accessibility by respecting the user’s preferred orientation. We’re building tools, libraries, and platform APIs to help you do this to provide a consistently excellent user experience across the entire Android ecosystem. The first and the most up-to-date source you have access to is Android’s very own website. Developer.android.com is one of the best places for all Android related resources on the web.

Jetpack Compose is the next-generation UI toolkit for building native Android UIs that helps developers make their work easier by using a declarative approach. Compared with the traditional XML layouts which may be complex and less flexible, Jetpack Compose conveniently enables developers to create UI components in Kotlin. Developing apps for Android and similar platforms means facing unique challenges, from strict compliance guidelines to sophisticated architectural structures.