sharedpreferences

问题 I'm trying to figure out how to set every String and Key name from my app's SharedPreferences using the getAll() method so I can use those values to name populated buttons and assign those buttons to the access the proper string in sharedpreferences to display in a textview. The problem is I do not know how to save these values to a String or String Array because I haven't ever dealt with maps before. If anybody could help me store my SharedPreferences keys and string values to a String array

问题 I'm using shared preference to store dynamically created buttons and also using it to store the label of dynamically generated buttons after renaming them. Application works fine till generating buttons but the problem is with labeling. If Label three buttons as Test1, Test2, Test3 and so on. But after restarting application all the generated buttons have label Test3 on them. Code in MainActivity SharedPreferences prefs=null; int count = 0; "Code in onCreate method" prefs = PreferenceManager

问题 i have a save some data from my preferences.xml but i want to put url to my activitity.java here my code ; public static final String PREFS_NAME = "mypreferemce.xml"; and this is my url to get some key from preference.xml public void lampu1(View view) { boolean on = ((ToggleButton) view).isChecked(); if (on) { final WebView wv = (WebView) findViewById(R.id.webview5); wv.setWebViewClient(new WebViewClient(){ public void onReceivedError(WebView view, int errorCode, String description, String

问题 I'm using SharedPreferences for my apps' Intro Slider. However, I'm getting an error on this line: class PrefManager { private SharedPreferences pref; private SharedPreferences.Editor editor; private static final String PREF_NAME = "welcome"; private static final String IS_FIRST_TIME_LAUNCH = "IsFirstTimeLaunch"; PrefManager(Context context) { int PRIVATE_MODE = 0; pref = context.getSharedPreferences(PREF_NAME, PRIVATE_MODE); editor = pref.edit(); } void setFirstTimeLaunch(boolean isFirstTime

问题 I've got an "activity a" which reads some values from SharedPreferences and display them in a TextView , then I call "activity b" where the values from SharedPreferences get updated and written back to SharedPreferences . Finally I go back to "activity a" by pressing the back-button, now the new (updated) values should be read from SharedPreferences and shown in the TextView . But here comes the problem, the values just read from SharedPreferences are still not updated (are not the new ones

问题 Are shared preferences in Android always read at startup and stored in memory during runtime? If not, are there more efficient ways to read preferences than this? settings = getSharedPreferences("myPrefsFile", 0); int answer = settings.getInt("ULTIMATE_QUESTION", 42); 回答1: Are shared preferences in Android always read at startup and stored in memory during runtime Simply Yes till user doesn't clear it manually from setting. are there more efficient ways to read preferences than this As

问题 My Flutter application uses the Flutter SharedPreferences plugin and send values to the iOS side with platform.invokeMethod. If I start the application, I have this error: [VERBOSE-2:dart_error.cc(16)] Unhandled exception: MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences) #0 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:278:7) <asynchronous suspension> #1 SharedPreferences.getInstance (package

问题 I can set the shared preferences in a AlertDialog with some radio buttons: public void ShowRadioDialog() { SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this); final SharedPreferences.Editor editor = preferences.edit(); SharedPreferences choiceSettings = getSharedPreferences("currentChoice", 0); final int[] currentChoice = {choiceSettings.getInt("currentChoice", 0)}; final CharSequence[] items={"Rosso","Verde","Blu","Giallo","Arancione"}; AlertDialog.Builder

问题 I have an app widged which basically has a textview. I also have an activity which displays a textview from string created within. Now i have a button in Activity 1 which onClick will send data (string to appWidget class) I tried putExtra and getExtra methods and also Shared preferences method, im little confused to use which first! Here are some inputs from me for more clarity. Activity1: final String addwidget = ((TextView)findViewById(R.id.verse)).getText().toString(); Intent widgetIntent

问题 I want to create a User Session on Android so that i do not have to login every time. What content should be stored in Shared Preferences so that i can authenticate every time my server gets a request from the user i can make sure people are not hacking into my system. The users can login via the following in my app Facebook Google Do i need to convert and store some encrypted data in Shared Preferences ? Or just Storing the users Email or Username should be enough. 回答1: Its easy to store the