sharedpreferences

问题 I am trying to store a boolean value which is changed every time a button is clicked. I want to do this using shared preferences, however I keep running into this error: Unresolved reference: getPreferences This is my code: btnStyle.setOnClickListener() { styleHasChanged = !styleHasChanged; if(styleHasChanged == true){ btnStyle.setText("true") }else{ btnStyle.setText("false") } // AppUtil.saveConfig(activity, config) // EventBus.getDefault().post(ReloadDataEvent()) var sharedPref :

问题 I am trying to debug extreme performance differences for users of my Android app. I have traced it to extreme differences in DB write time and SharedPreferences read and write time. Here are 7 performance tests I wrote to test the speed of SharedPreferences: private void testEditor1() { SharedPreferences settings = this.getSharedPreferences(Constants.PrefsName, 0); SharedPreferences.Editor editor = settings.edit(); editor.putBoolean("testEditor1", true); editor.commit(); } private void

问题 My sharedpreferences does not save if i re-open my game the data that i saved before with SharedPreferences are not load, setting on my current activity is back to normal again or default this is the image of my button in menu.class this is the following code of my menu.class @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

问题 I wanna display a dialog when the user selects a specific item from a ListPreference in my preferenceActivity. But, I cannot get the onSharedPreferenceChanged() to work. I've put a Toast in the beginning of the method, and it does not show, so the method doesn't even run through, why is this? Here's my code: (Thanks) public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) { Toast.makeText(Preferences.this, "prefs Changed", Toast.LENGTH_SHORT) .show(); if (key

问题 Are SharedPreferences value for an App retained even after it is removed? If not, I would like to retain the SharedPreferences even after the app is uninstalled/removed. Is there a way? Edit: I am reluctant to store the settings on the SD Card. Is there a way I can store them in the phone memory itself? 回答1: SharedPreferences are deleted when an app is uninstalled, but you can use the BackupManager to perform a backup into the cloud - Reto Meier has a good blog post for getting you started.

问题 I have an ArrayList of custom class Task public class Task { String name,desc; Date date; Context context; public Task(String name, String desc, Date date, Context context) { this.name = name; this.desc = desc; this.date = date; this.context = context; } } I want to save it in SharedPreferences.. I read that can be done by converting it to Set.. But I don't know how to do this.. Is there a way to do this? Or any other way to store data rather than SharedPreferences? Thanks :) EDIT: String s =

问题 I have a strange problem. I have never had it before. When I try to save int value to my SharedPreference and then restore in other Activity. Value is always 0 even if I save there other value (for example: 1); private String Number; private String Profile; and then saving values (in this case "1") to SharedPreferences in first Activity: SharedPreferences a = FirstActivity.this.getSharedPreferences("a", MODE_PRIVATE); SharedPreferences.Editor prefsEditorProfiles = a.edit();

问题 I'm accessing my Android apps SharedPreferences via private val sharedPref = PreferenceManager.getDefaultSharedPreferences(context)` and then attempting to get data from it using val lat: String = sharedPref.getString("MyKey", "Default") But this line gives me an error reading "Type mismatch. Required String, found String?" According to the documentation the second parameter in the getString method says "Value to return if this preference does not exist. This value may be null. " So what's

问题 I've been pulling my hair trying to figure this out: I'm making an HttpsURLConnection and using java.net.cookiemanager to manage my cookies (there's no way of using android.webkit.cookiemanager to HttpUrlConnection/HttpsUrlConnection as I have understood?). I need to save my longtime cookie to later connections. Sadly I can't use http://loopj.com/android-async-http/ and it's PersistentCookieStore because I need to allow an untrusted certificate (using http://abhinavasblog.blogspot.se/2011/07

问题 I have preference.xml like this <MultiSelectListPreference android:key="store_select" android:title="@string/setting_store_title" android:summary="@string/setting_store_summary" android:dialogTitle="@string/setting_store_dialog_title" android:entries="@array/store_names" android:entryValues="@array/stores" android:defaultValue="@array/stores" /> with my two arrays: <string-array name="stores"> <item>1</item> <item>2</item> <item>3</item> <item>4</item> <item>5</item> </string-array> <string