問題：
In Android API 11+, Google has released a new class called Fragment .在 Android API 11+ 中，Google 發佈了一個名爲Fragment的新類。
In the videos, Google suggests that whenever possible ( link1 , link2 ), we should use fragments instead of activities, but they didn't explain exactly why.在視頻中，Google 建議在可能的情況下（ link1 、 link2 ），我們應該使用片段而不是活動，但他們沒有確切解釋原因。
What's the purpose of fragments and some possible uses of them (other than some UI examples that can be easily be achieved by simple views/layouts)?片段的目的是什麼以及它們的一些可能用途（除了一些可以通過簡單視圖/佈局輕鬆實現的 UI 示例）？
My question is about fragments:我的問題是關於片段：
- What are the purposes of using a fragment?使用片段的目的是什麼？
- What are the advantages and disadvantages of using fragments compared to using activities/views/layouts?與使用活動/視圖/佈局相比，使用片段的優缺點是什麼？
Bonus questions:獎金問題：
- Can you give some really interesting uses for fragments?你能給片段提供一些非常有趣的用途嗎？ Things that Google didn't mention in their videos?谷歌在他們的視頻中沒有提到的事情？
- What's the best way to communicate between fragments and the activities that contain them?在片段和包含它們的活動之間進行通信的最佳方式是什麼？
- What are the most important things to remember when you use fragments?使用片段時要記住的最重要的事情是什麼？ Any tips and warnings from your experience?您的經驗有什麼提示和警告嗎？
解決方案：
參考一： https://en.stackoom.com/question/hxrl參考二： https://stackoom.com/question/hxrl