How to start Android app development

Transcript

1. How to start Android app development wasabeef GDG Tokyo New

   Year 2018

2. About me Daichi Furiya Google Developer Expert CyberAgent, Inc. @wasabeef_jp

   wasabeef

3. Android OS

4. 8.1 Oreo (2017/12) Unix like (C/C++, Java) smartphones, tablets, 


   TV, wear, auto Android OS
5. None

6. Lessons

7. Building Your First App Different Devices Lifecycles System Permissions Lessons

8. Building Your First App Different Devices Lifecycles System Permissions Lessons

9. Building Your First App Different Devices Lifecycles System Permissions Lessons

10. Building Your First App Different Devices Lifecycles System Permissions Lessons

11. Building Your First App Different Devices Lifecycles System Permissions Lessons

12. Building Your First App

13. Android Studio d.android.com/studio

14. Demo!

15. None

16. Kotlin

17. Concise Safe Interoperable Tool-Friendly Kotlin Kotlin Koans Online
 https://try.kotlinlang.org

18. Diffrent Devices

19. Diffrent Devices

20. Versions (2018/01) Version Release Date Codename API Distribution 2.3.3 -

    2.3.7 2010/12 Gingerbread 10 0.4% 4.0.3 - 4.0.4 2011/10 Ice Cream 15 0.5% 4.1.x 2012/07 Jelly Bean 16 1.9% 4.2.x 2012/11 17 2.9% 4.3 2013/7 18 0.8% 4.4 2013/10 KitKat 19 12.8% 5.0 2014/11 Lollipop 21 5.7% 5.1 2015/03 22 19.4% 6.0 2015/10 Marshmallow 23 28.6% 7.0 2016/08 Nougat 24 21.1% 7.1 2016/12 25 5.2% 8.0 2016/08 Oreo 26 0.5% 8.1 2017/12 27 0.2%

21. Support Library

22. Backward Compatibility for newer APIs Convenience and Helper Classes Debugging,

    Testing and Utilities Support Library

23. Support Library // build.gradle (app) dependencies { implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:1.1.51" implementation

    "com.android.support:appcompat-v7:27.0.2" implementation "com.android.support:design:27.0.2" }

24. Support Library <android.support.design.widget.FloatingActionButton android:id="@+id/fab" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="end|bottom" android:src="@drawable/ic_my_icon" android:layout_margin="16dp" />

25. Lifecycles

26. Lifecycles

27. Lifecycles override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) } override

    fun onResume() { super.onResume() } override fun onPause() { super.onPause() } override fun onDestroy() { super.onDestroy() }

28. System Permissions

29. System Permissions <!— AndroidManifest.xml —> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="jp.wasabeef.demo" > <uses-permission

    android:name="android.permission.INTERNET" /> ... </manifest>

30. Internet Camera Storage Location Vibrate System Permissions Calendar Contacts Phone

    Wake Lock Alarm

31. Runtime Permissions at Run time ~ Lollipop (5.x) Marshmallow (6.x)

    ~

32. Etc..

33. View Animation Intent Kotlin Support Library RxJava, RxKotlin Android Architecture

    Components Etc.. Testing Media (ExoPlayer) FireBase DI (Dagger..)

34. Thank you. twitter.com/wasabeef_jp wasabeef.jp github.com/wasabeef