4種components:
Activity - UI
Services - Background job
Broadcast Receivers - Receive system broadcast, create status bar, schedule job
Content providers - read / write data
Intent啟動activity - startActivity() 或 startActivityForResult(), 完結後可以有return value
Intent啟動 service - startService() / bindService() / JobScheduler() [ver 5.0 above [must explicit]
Intent啟動 broadcast receiver - sendBroadcast(), sendOrderedBroadcast(), 或 sendStickyBroadcast()
ContentResolver啟動content provider - query()
現在繼續看Core topics了。
[待續] |