Android Development Essentials

Explore the world of Android app development. This talk will prepare you to create your very first Android app.

You’ll learn about:
* Android Studio, the preferred IDE for creating Android apps,
* The Android emulator, software designed to mimic a real device,
* The different files in a typical Android app,
* And finally, you’ll learn how an app is built from the bottom up

This talk is designed to provide you with everything you need to know to understand the Android development process. Let’s get started!

Transcript

1. Android Development Essentials Annyce Davis - @brwngrldev
2. @brwngrldev What comes to mind…
3. @brwngrldev ANDROID
4. https://blog.google/products/android/2bn-milestone
5. @brwngrldev Foundational knowledge
6. @brwngrldev Foundational knowledge • Programming basics
7. @brwngrldev Foundational knowledge • Programming basics • Object-oriented design
8. @brwngrldev Foundational knowledge • Programming basics • Object-oriented design • JVM-based language
9. @brwngrldev Foundational knowledge • Programming basics • Object-oriented design • JVM-based language • XML
10. @brwngrldev App development…
11. @brwngrldev App development… Display screen to user
12. @brwngrldev App development… Display screen to user Handle user’s action
13. @brwngrldev App development… Display screen to user Handle user’s action M ake API request
14. @brwngrldev Display screen to user Handle user’s action M ake API request App development…
15. @brwngrldev App development…
16. @brwngrldev Sources of complexity
17. @brwngrldev Sources of complexity • Multiple versions of Android
18. @brwngrldev Sources of complexity • Multiple versions of Android • Variety of devices
19. @brwngrldev Sources of complexity • Multiple versions of Android • Variety of devices • Physical size
20. @brwngrldev Sources of complexity • Multiple versions of Android • Variety of devices • Physical size • Pixel density
21. @brwngrldev Sources of complexity • Multiple versions of Android • Variety of devices • Physical size • Pixel density • Manufacturer’s custom software
22. Sample app github.com/adavis/puppy-tracker @brwngrldev
23. @brwngrldev Android Studio
24. @brwngrldev Android Studio
25. @brwngrldev • Code editor Android Studio
26. @brwngrldev • Code editor • Visual layout editor Android Studio
27. @brwngrldev • Code editor • Visual layout editor • Gradle build system Android Studio
28. @brwngrldev • Code editor • Visual layout editor • Gradle build system • Debugging tools Android Studio
29. Demo @brwngrldev
30. @brwngrldev Android App File Structure
31. @brwngrldev File structure
32. @brwngrldev • Source code File structure
33. @brwngrldev • Source code • Graphics File structure
34. @brwngrldev • Source code • Graphics • Resources File structure
35. Demo @brwngrldev
36. @brwngrldev Android App Components
37. @brwngrldev
38. @brwngrldev Activity
39. @brwngrldev Activity Fragment
40. @brwngrldev Activity Fragment Widget
41. package info.adavis.puppytracker import android.os.Bundle import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) if (savedInstanceState == null) { supportFragmentManager.beginTransaction() .replace(R.id.container, MainFragment.newInstance()) .commitNow() } } } @brwngrldev
42. package info.adavis.puppytracker import android.os.Bundle import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) if (savedInstanceState == null) { supportFragmentManager.beginTransaction() .replace(R.id.container, MainFragment.newInstance()) .commitNow() } } } @brwngrldev
43. package info.adavis.puppytracker import android.os.Bundle import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) if (savedInstanceState == null) { supportFragmentManager.beginTransaction() .replace(R.id.container, MainFragment.newInstance()) .commitNow() } } } @brwngrldev
44. class MainFragment : Fragment() { override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { return inflater.inflate(R.layout.fragment_main, container, false) } … @brwngrldev
45. class MainFragment : Fragment() { override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { return inflater.inflate(R.layout.fragment_main, container, false) } … @brwngrldev
48. Sample app code github.com/adavis/puppy-tracker @brwngrldev