Javantura v4 - Android App Development in 2017 - Matej Vidaković
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This document summarizes key topics in Android app development in 2017, including Java 8 support, IDE options like Android Studio, build tools like Gradle, testing approaches, supporting older Android versions, and following material design guidelines. It discusses alternatives to Java like Kotlin, techniques for handling the 64k method limit, and resources for continuing to learn Android.
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Javantura v4 - Android App Development in 2017 - Matej Vidaković
- 2. What’s up with Android Java? ● Some Java 8 feature support (in theory) ● Libs that help ○ Retrolambda ○ Lightweight-Stream-API ● Dalvik vs ART ● Alternatives? ○ Kotlin ○ Scala ○ Groovy ○ …
- 3. Which IDE to use? ● Eclipse - no longer officially supported ● Android Studio - official IDE ● NetBeans, IDEA - Android plugins
- 4. What makes Android Studio so cool? ● Modified IDEA ● Gradle build system support ○ Easily customizable ○ Build variants (type x flavor) ● Emulator now actually fast
- 5. I’m still not convinced... ● Android specific static code analysis (support annotations) ● Profiling tools ● Instant run ● Vector drawable ● Data Binding ● Samples browser ● Apk analyzer ● Layout inspector ● ...
- 6. What about testing? ● Local ○ No Android dependencies ○ Run on local JVM ● Instrumented ○ Android dependencies ○ Run on device or emulator ● JUnit 4 ● Espresso UI testing ● Test recorder (beta)
- 7. 2.3.3 - 2.3.7 Gingerbread 10 1.0% 4.0.3 - 4.0.4 Ice Cream Sandwich 15 1.1% 4.1.x Jelly Bean 16 4.0% 4.2.x 17 5.9% 4.3 18 1.7% 4.4 KitKat 19 22.6% 5.0 Lollipop 21 10.1% 5.1 22 23.3% 6.0 Marshmallow 23 29.6% 7.0 Nougat 24 0.5% 7.1 25 0.2% Which versions to support? IDEALLY minSdkVersion (lowest possible) <= targetSdkVersion == compileSdkVersion (latest SDK)
- 8. Support library Multidex Palette Test RecyclerView Design GridLayout Leanback Annotations Percent MediaRouterCardView How to support ancient versions? Appcompat
- 9. Is 64k method limit still a thing? ● Yes… ● Check method count of libs at methodscount.com ● Use Proguard / Dexguard (@Keep) ● If all else fails - Multidex
- 10. How should my app look like?
- 11. And how do I do that? ● Design guidelines - material.io/guidelines ● Standard icons - material.io/icons ● Support libs ○ Design ○ Appcompat ○ CardView ○ Palette ○ Percent ● Material Design Android Library
- 13. Where can I learn more? ● Udacity.com - basic and advanced Android nanodegrees ● Coursera.org - Android App Development Specialization ● Android Programming: The Big Nerd Ranch Guide book (new edition coming this month) ● Caster.io ● Google codelabs
- 14. Cool presentation, but I already knew all that… ool talk, but I already know all of that… five.agency/about/careers/