Playing with Anko and Android KTX

Kotlin is an amazing language and we all love building Android apps using Kotlin. But still we write our code in "kind of" Java fashion and don't leverage powerful features of Kotlin like Extension function.

In this talks my goal is to show how you can make your Android application development faster and easier by leveraging Anko and Android KTX library in more clean and pleasant way.

Outline:

- Refresher about Kotlin for Android
- What is Anko
- Adding Anko to your project
- Amazing APIs by Anko
- What is Android KTX
- Adding Android KTX to your project
- Showcasing Android KTX APIs
- Conclusion

Transcript

1. Playing with Anko and Android KTX Pleasant Android Development @Akshay_Chordiya BitFurther
2. "Toolbox" for Kotlin Android developer
3. Anatomy of Anko Coroutines Anko Commons Layouts SQLite
4. Anatomy of Anko Coroutines Anko Commons Layouts SQLite
5. Anatomy of Anko Commons Intents Dialog & toasts Logging Resources & dimens Commons
6. ext.anko_version='0.10.4' dependencies { // Commons, Layouts, SQLite implementation "org.jetbrains.anko:anko:$anko_version" } // Commons implementation "org.jetbrains.anko:anko-commons:$anko_version" // Coroutines implementation "org.jetbrains.anko:anko-coroutines:$anko_version" // SQLite implementation "org.jetbrains.anko:anko-sqlite:$anko_version" Adding Anko * 0.10.4 is latest version at the moment
7. dependencies { // Commons, Layouts, SQLite implementation "org.jetbrains.anko:anko:$anko_version" } // Commons implementation "org.jetbrains.anko:anko-commons:$anko_version" // Coroutines implementation "org.jetbrains.anko:anko-coroutines:$anko_version" // SQLite implementation "org.jetbrains.anko:anko-sqlite:$anko_version" Adding Anko
8. dependencies { // Appcompat-v7 (only Anko Commons) implementation "org.jetbrains.anko:anko-appcompat-v7-commons:$anko_version" // Other support library equivalent... } Support Library
9. Anatomy of Anko Commons Intents Dialog & toasts Logging Resources & dimens Commons
10. Anko Common - Intent // Standard Kotlin way val intent = Intent(this, BoringActivity::class.java) // Anko way val intent = intentFor<BoringActivity>
11. Anko Common - Intent // Standard Kotlin way val intent = Intent(this, BoringActivity::class.java) intent.putExtra("id", 1) // Anko way val intent = intentFor<BoringActivity>("id" to 1)
12. Anko Common - Intent // Standard Kotlin way val intent = Intent(this, BoringActivity::class.java) intent.putExtra("id", 1) intent.setFlag(Intent.FLAG_ACTIVITY_SINGLE_TOP) // Anko way val intent = intentFor<BoringActivity>("id" to 1).singleTop()
13. Anko Common - Intent // Standard Kotlin way val intent = Intent(this, BoringActivity::class.java) intent.putExtra("id", 1) startActivity(intent) // Anko way startActivity<BoringActivity>("id" to 1)
14. Make a call makeCall(number) Send a text sendSMS(number, [text]) Browse the web browse(url) Share some text share(text, [subject]) Send a email email(email, [subject], [text]) Some handy intents
16. Anatomy of Anko Commons Intents Dialog & toasts Logging Resources & dimens Commons
17. Anko Common - Toast // Standard Kotlin way Toast.makeText(this, "Go Kotlin!", Toast.LENGTH_SHORT) // Anko way toast("Go Kotlin!") // Standard Kotlin way Toast.makeText(this, "Go Kotlin!", Toast.LENGTH_SHORT).show() And we forget calling “show” // For toast with LENGTH_LONG longToast("Go Kotlin!")
18. Anko Common - Toast // Anko way toast("Go Kotlin!") inline fun Context.toast(message: CharSequence): Toast = Toast .makeText(this, message, Toast.LENGTH_SHORT) .apply { show() }
19. Anko Common - Toast // Anko way toast("Go Kotlin!") inline fun Context.toast(message: CharSequence): Toast = Toast .makeText(this, message, Toast.LENGTH_SHORT) .apply { show() }
20. dependencies { // For Snackbar, etc. implementation "org.jetbrains.anko:anko-design:$anko_version" // Other anko dependencies... } Adding Anko
21. Anko Common - Snackbar // Standard Kotlin way Snackbar.make(view, "Go Kotlin!", Snackbar.LENGTH_SHORT).show() // Anko way snackbar(view, "Go Kotlin!")
22. Anko Common - Snackbar // Standard Kotlin way Snackbar.make(layout, "Go Kotlin!", Snackbar.LENGTH_SHORT) .setAction("Undo") { // Undo logic } .show() // Anko snackbar(layout, "Go Kotlin!", "Undo") { // Undo logic }
23. Anko Common - Snackbar // Anko way snackbar(view, "Go Kotlin!") inline fun snackbar(view: View, message: Int) = Snackbar .make(view, message, Snackbar.LENGTH_SHORT) .apply { show() }
24. Anko Common - Alert Dialog // Standard Kotlin way AlertDialog.Builder(this) .setTitle("Title") .setMessage("It's DSL magic") .setPositiveButton("Yes") { toast("Awesome") } .setNegativeButton("No") {} .show() // Anko DSL way alert("Title", "It's DSL magic") { yesButton { toast("Awesome") } noButton {} }.show()
25. Anatomy of Anko Commons Intents Dialog & toasts Logging Resources & dimens Commons
26. Anko Common - Logging class LoggingActivity : AppComaptActivity(), AnkoLogger { private fun doLogging() { info("Anko") debug("is") warn("amazing") } }
27. Anatomy of Anko Commons Intents Dialog & toasts Logging Resources & dimens Commons
28. Anko Common - Misc // DP -> PX val px = dip(40) // SP -> PX val px = sp(24) // PX -> DP val dp = px2dip(px) // PX -> SP val sp = px2sp(px)
29. Anko Common - Misc doFromSdk(Build.VERSION_CODES.O) { // Will run on O and above }
30. Anatomy of Anko Coroutines Anko Commons Layouts SQLite
31. Anko Layout override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) verticalLayout { editText { hint = "Name" textSize = 18f } editText { hint = "Password" textSize = 18f } button("Login") { textSize = 14f } } } No setContentView()
32. Even sweeter Kotlin Android Development Android KTX Preview
33. dependencies { implementation 'androidx.core:core-ktx:0.3' } Adding Android KTX *0.3 is latest version at the moment
34. Basic // Kotlin val uri = Uri.parse(stringUri) // KTX val uri = stringUri.toUri()
35. Basic // Kotlin val uri = Uri.parse(stringUri) // KTX val uri = stringUri.toUri() // Kotlin sharedPreferences.edit() .putString("kotlin", "awesome") .apply() // KTX sharedPreferences.edit { .putString("kotlin", "awesome") }
36. Bundle // KTX val bundle = bundleOf("id" to 1, "style" to "fancy") // Kotlin val bundle = Bundle() bundle.putLong("id", 1) bundle.putString("style", "fancy")
37. System Service // KTX val alarmManager = systemService<AlarmManager>() // Kotlin val alarmManager = getSystemService(AlarmManager::class.java)
38. Android KTX Anko vs
39. Android KTX Anko
40. Conclusion
41. There’s a whole lot more...
42. Questions
43. Further Resources • All the images and logos used are trademarks of respective companies and/or author • Anko • Introducing Android KTX • Android KTX • Exploring Android KTX - Joe Birch - Medium • Anko Layouts - Antonio Leiva • All Kotlin Extensions
44. Thank you! Slides: https://goo.gl/yTyjDq