android
Introduction
Openfire, Smack/Asmack, Spark使用
更新Adapter
给RecyclerView的item加OnClickListener
两种Fragment的区别
用gson对abstract class (de)serialize
用Firebase储存自定义class
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两种Fragment的区别
两种Fragment的区别
extends Fragment:
不能用getContext(),要用getActivity().getApplicationContext(),否则runtime error
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