對於用戶數據庫,在activity_main中使用的類型未定義方法getactivity() [英]the method getactivity() is undefined for the type Use In activity_main for User Database
當我在 Fragment 中創建 ImageView 時,如何解決 getActivity() 為 null [英]How to resolve that getActivity() is null, when I create an ImageView in Fragment
從另一個類調用時,getActivity()在AsyncTask中返回null [英]getActivity() returns null in AsyncTask when called from another class
從對話框片段運行時,為什么片段片段上的getActivity()不起作用 [英]Why doesn't getActivity() on a listfragment work when ran from a dialogfragment