Googleio2018 Android Tech

last update: 2018-09-15 00:00:00 +0000

date: 2018-09-15 title: Keywords in sessions about technical detail of Android @ Google I/O 2018 video_id: YyDnYaFtRS0 description: categories:

google resources:
name: Event Page link: https://events.google.com/io/ type: Video set: google-io-2018 set_order: 6 —

Understanding Android memory usage

memory impact with shared page
- RSS (Resident Set Size)
- PSS (Proportional Set Size) ← use this
- USS (Unique Set Size)
memory pressure
apk size減らすとmemory usageも減らせがち

非同期通信について
- PからANRでダイアログは表示されずに落ちる https://www.xda-developers.com/android-p-app-not-responding-crash-dialogue/
ContentProvider → room

- entry level device はIndiaの次がUS
- アプリのインストールコンバージョンとサイズは負の相関がある
- apkを小さくしよう

History of Android development
Tools
- Hierarchy Viewer → Layout Inspector
- Trace View, Systrace, DDMS → Profiler
- Layout editor
Runtime & Language
- Dalvik → ART
  - allocation / appropriate types
- Java → Kotlin
  - https://android.github.io/kotlin-guides/index.html
APIs
- ConstraintLayout
  - AbsoluteLayout / GridLayout / FlameLayout / RelativeLayout
- RecyclerView
  - ListVIew / GridView / Gallery
- Fragments
  - Core platform API @deprecated
- Activity
  - Use single activities when possible
- Architecture
  - Google don’t have any opinion 2 years before
  - Lifecycle
  - ViewModel, LiveData
  - Room
  - Paging
- Graphics
  - Reccommended libraries: Glide, Picasso, Lottie
Best Coding Practices
- Don’t change
- Profile your code / Avoid work when possible / Minimize memory consumption