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How to start
Android app development
wasabeef
GDG Tokyo New Year 2018
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About me
Daichi Furiya
Google Developer Expert
CyberAgent, Inc.
@wasabeef_jp wasabeef
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Android OS
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8.1 Oreo (2017/12)
Unix like (C/C++, Java)
smartphones, tablets,
TV, wear, auto
Android OS
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Lessons
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Building Your First App
Different Devices
Lifecycles
System Permissions
Lessons
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Building Your First App
Different Devices
Lifecycles
System Permissions
Lessons
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Building Your First App
Different Devices
Lifecycles
System Permissions
Lessons
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Building Your First App
Different Devices
Lifecycles
System Permissions
Lessons
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Building Your First App
Different Devices
Lifecycles
System Permissions
Lessons
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Building
Your First App
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Android Studio
d.android.com/studio
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Demo!
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Kotlin
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Concise
Safe
Interoperable
Tool-Friendly
Kotlin
Kotlin Koans Online
https://try.kotlinlang.org
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Diffrent Devices
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Diffrent Devices
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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%
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Support Library
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Backward Compatibility for newer APIs
Convenience and Helper Classes
Debugging, Testing and Utilities
Support Library
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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"
}
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Support Library
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Lifecycles
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Lifecycles
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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()
}
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System Permissions
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System Permissions
...
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Internet
Camera
Storage
Location
Vibrate
System Permissions
Calendar
Contacts
Phone
Wake Lock
Alarm
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Runtime Permissions at Run time
~ Lollipop (5.x) Marshmallow (6.x) ~
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Etc..
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View
Animation
Intent
Kotlin
Support Library
RxJava, RxKotlin
Android Architecture Components
Etc..
Testing
Media (ExoPlayer)
FireBase
DI (Dagger..)
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Thank you.
twitter.com/wasabeef_jp
wasabeef.jp
github.com/wasabeef