Android 四大基本组件
===

1. Activity
2. Service
3. Content Provider
4. BroadcastReceiver

## Ref.
[【學習筆記】Android四大組件](https://mrraybox.blogspot.com/2018/06/android_11.html)
[Android四大基本组件介绍与生命周期](https://www.cnblogs.com/bravestarrhu/archive/2012/05/02/2479461.html)
###### tags: `介紹`