sharedpreferences

问题 I googled this and found a few answers which I find confusing since I am a beginner. I am trying to implement the OnSharedPreferenceChangeListener() to my SharedPreferences to make something happen with the change. My code so far is: final SharedPreferences rates_storage = this.getApplicationContext().getSharedPreferences("uk.chiraggalaiya.test", 0); final SharedPreferences.Editor rates_storage_editor = rates_storage.edit(); Button btn = (Button) findViewById(R.id.button); btn

问题 I have a fragment and I want to store the Facebook id in a shared preference. I can't write mode private in the get preference function. And also I want to access this shared preference in another fragment. How can I do so? Here is my code... Session.openActiveSession(getActivity(), true, new Session.StatusCallback() { @Override public void call(Session session, SessionState state, Exception exception) { if (session.isOpened()) { Request.executeMeRequestAsync(session,new Request

问题 When my app starts, I populate a container class with values from my shard prefs. The idea was to handle the SharedPreferences and PreferenceManager once since I'm guessing they're heavy. Here's a sample: SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(cont); StorageClass.lifespan = Integer.parseInt( prefs.getString("lifespan", "8") ); StorageClass.hiRate = Integer.parseInt( prefs.getString("hiRate", "71") ); //and on and on for all preferences Other activities then

问题 I've written an app that has several hard-coded settings such as fontSize or targetDirectory. I would like to be able to change those type of settings on an infrequent basis. SharedPreferences seems to be one way to go about it but I want to share this application and settings, and my phone is not rooted. My application is a personal tool, and does not have a UI. It opens, does it's job, and then closes. I could create the equivalent of a Windows .ini file and read/write to it, but that seems

问题 I have interpreted the following about SharedPreferences and have a bit of doubt of what they are capable of. Here is what I found: Android SharedPreferences are used for the globalization of a variable so that throughout the application we can use SharedPreferences to store and retrieve data instead of defining static variables in one class and let the class be used to retrieve the variables throughout the app. Can someone explain whether this is correct. If there are major differences that

问题 Hi I am working on a scorecard showing 4 players' score in a game, and when the user press a button, a new row would be inserted. I do this by: private void makeTag(String P1Score, String P2Score, String P3Score, String P4Score, String slot) { // originalQuery will be null if we're modifying an existing search String originalScore = SavedSlots.getString(slot, null); // get a SharedPreferences.Editor to store new slot/scores SharedPreferences.Editor preferencesEditor = SavedSlots.edit();

问题 I wish to store an ArrayList which contains Hashmap inside SharedPreferences. How can I do this? 回答1: You can convert your collection into a json and store it in shared preference. Whenever you need to get the data, just get the string and convert the JSON back into your collection. //converting the collection into a JSON JSONArray result= new JSONArray(collection); SharedPreferences pref = getApplicationContext().getSharedPreferences(PREF_NAME, 0); //Storing the string in pref file

问题 I know this has been asked before, but i can't seem to figure it out i am trying to get my preferences by this: SharedPreferences preferences = this.getActivity().getSharedPreferences("storedName", Context.MODE_PRIVATE); String loginemail = preferences.getString("storedName", ""); but this doesn't seem to work, i have multiple sharedPreferences which i need to get in my fragment what is the correct way to do it? As getDefaulSharedPreferences(this) doesn't work. i store my prefs like so:

问题 I try to save the value of an int "redRing" from the class "Ring" displayed in a TextView of another activity using SharedPreferences, it can work but not everytime, sometimes there's a reset of the value of my int if I quit the app and come back again in my app but not everytime. I did a simple small example of code if someone can try to say me what's wrong with my code? 1) The class Ring : public class Ring { // User search rings with different colors public static int color; public static

问题 I am making a live wallpaper where i need to change the speed of a vehicle in setting scene and it needs to get reflected back to the wallpaper service when i press the return button. In my preference activity, i save the list preference changes in shared preferences like this :- @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.prefs); ListPreference listPreference = (ListPreference) findPreference("listPref");