0-0 pre
why: this class and OHTERS #internet security
broadness: financial need computer knowledge?
trend: shareware, network, notebook, mac, different OS , diversify

1-1 build 1st project
p1-2
new proj: 新專案; 注意它的位置
Phone and Tablet, Wear OS, Android TV, Automotive #note, different templates --> different activity
Empty Activity: 空白的動作

p1-7
Name: project name
Package name: 套件名
Save location: 放在那兒
Language: 使用那種語言
SDK: software development kit

How to remove a project? rm -fr newProj
p1-12
activity_main.xml

1-2 simulate on desktop computer (instead of phone)
p1-15 create android simulator (AVD: android virtual device)
Tools/Device Manager/Create Virtual Device
p1-16 low res HVGA 320x480
p1-17 ABI
p1-19 run app on emulator:
note: emulator can be run by itself, however Run app can be run on top of emulator
remove android studio completely: https://stackoverflow.com/questions/17625622/how-to-completely-uninstall-android-studio-on-mac