在android片段中保存数据(Save data in android fragment)

在android片段中保存数据(Save data in android fragment)

我正在开发Xamarin Android应用程序 。我不知道如何保存我在myfragment中的变量值。当我完全关闭它后重新打开我的应用程序时，我想要该变量的值。我如何实现它？

I am developing Xamarin Android Application.I don't know how to save variable value which I have in myfragment.I want that variable's value back when I reopen my application after completely closing it.How can I implement it ?

最满意答案

您可能想要使用SharedPreferences（Xamarin中的ISharedPreferences）：

ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences (mContext); ISharedPreferencesEditor editor = prefs.Edit (); editor.PutString ("your_string_key", "your_string_value"); editor.Apply();

您也可以远离其他类型的数据

guys I have already solve this using below code in fragment:

protected void saveset(){ var prefs =this.Activity.GetSharedPreferences("MyApp",FileCreationMode.Private); var prefEditor = prefs.Edit(); prefEditor.PutString ("LoginUserName",LoginUserName.Text.Trim()); prefEditor.PutString ("ProfilePicture",ImageUrl); prefEditor.PutString ("UserID", User_Id); prefEditor.Commit(); } protected void retrieveset(){ //retreive var prefs =this.Activity.GetSharedPreferences("MyApp", FileCreationMode.Private); LoginUserName.Text= prefs.GetString ("LoginUserName", string.Empty); ImageUrl= prefs.GetString ("ProfilePicture", string.Empty); User_Id = prefs.GetString ("UserID", string.Empty); }