Androidアプリ開発覚え書

AndroidStudio.md

AppStore, GooglePlay Comparison

	AppStore	GooglePlay
registration fee	0	2,500
annual fee	10,800	0
Support Web	required	optional
Requrered OS	Updated macOS	Moderate Modern OS

developer contract at GooglePlay

Apple Developer Program

iOS, Android Development Environment Comparison

	AppStore	Android
Event Listener	Container VC	Activity
Event Listener	Content VC	Fragment
info to 2nd View	Segue	Intent
Drawing Canvas	View	wedgit, Layouts, Text, etc

note: Layouts are special kinds of View that can be basements of other View.

finding files

1. starting p charactor

> find . -type f -name "p*"
./playlist.m3u
./playlist-2.m3u
./iTunes/pt.strings

2. starting p charactor and ending m3u extension

> find . -type f -name "p*.m3u"
./playlist.m3u
./playlist-2.m3u
./iTunes/ppp.m3u

3. containing list word

>find . -type f -name "*list*"

4. files which have extension png or jpg

>find -E . -type f -iregex ".*\.(png|jpg)"

note: in case of searching other type of something like directory, -type d or something is suitable. see Man of find and retrieve '-type'

build.gradle configuration tips

In case of working on ERROR: The Android Gradle plugin supports only Kotlin Gradle plugin version 1.3.10 and higher, things that should be confirmed are 1 - 3 below.

1. gradle-plugin▶️Project Structure menu at Android Studio or command-;
2. kotlin-gradle-plugin▶️folder below, find . -type d -name "kotlin-gradle-*" at ~/.gradle

> ls
1.2.41 1.3.21 1.3.30 1.3.31

3. Gradle▶️see directories folder at ~/.gradle/daemon

>ls
4.10.1 4.4    4.6    5.1.1

Official Gradle page

僕たちはいつまでこんな楽しいAndroid Studio設定をし続けるのか？ Android Studio 3.x時代の設定不足解消メモ

History of Android Studio

	Release date
1.0	2014/12
2.0	2016/04
2.3	2017/03	Constraint layout is default.
3.0	2017/10
3.1	2018/03
3.2	2018/09
3.3	2019/03
3.4	2019/04
History of Android Studio