sharedpreferences

问题 First, a bit of my background. I have been working on large web systems for over a decade, Android is something I have been looking at for the past two months; as you can imagine, the gap is quite wide :) Looking at Android's Security and Permissions and Data Storage part of documentation, talking directly to developers, reading books and tutorials, it is pretty clear how entire model works. However, I was unable to find an answer whether SQLite and SharedPreferences files are secure enough

问题 I have a SyncAdapter running on its own process separately from the main app process. I'm using a static wrapper class around my SharedPreferences that creates a static object on process load (Application's onCreate ) like so: myPrefs = context.getSharedPreferences(MY_FILE_NAME, Context.MODE_MULTI_PROCESS | Context.MODE_PRIVATE); The wrapper has get and set methods, like so: public static String getSomeString() { return myPrefs.getString(SOME_KEY, null); } public static void setSomeString

问题 I am porting an Android app to iOS, one thing I used was the Shared Preferences in Android to save each time a level was complete. That way when the user gets back into the app, they can see they are up to level 3 or whatever. Is there a similar mechanism in iOS? or do I have to manually write out to an application specific file? If so, how do I write out to files only visible to my application? Thanks. 回答1: Use NSUserDefaults : - note that this is for small bits of data, such as the current

问题 In my android app I have created a preference class(which extends PreferenceActivity) for storing about 10 integer values. I am not creating any xml file for that activity in R.xml as I don't want it. I just need to store 10 integer variables in this file(which can save it even after exit) and I want to get these values from another activity, perform some changes to the preferences, then save the preference class. My queries are: How can I store an integer variable in preference class? How to

问题 I am creating an application,In my app I am getting response and displaing it in custom alert dialog, Till here it works fine, Now what I am trying to do is if user selects an item from alert dialog once, it should store it in preference so that no need of fetch the data every time. Following is my code snippet. The following response which i am getting is : { "states": [ { "id": "1", "state_slug": "agra", "statename": "Agra" }, { "id": "2", "state_slug": "andaman_and_nicobar_islands",

问题 I have an activity that opens another activity to get a download pic. The picture comes back to my original activity and rest in an imageView. That's working fine. How do I save the image so when the user comes back later, or kills to app the image is still there. I know I am supposed the use Shared Preferences to get the image path and not save the image itself but I just don't know how do that. Main Activity public class MainActivity extends Activity { private static final int REQUEST_CODE

问题 I have just learnt using preferences in Android. For debugging purpose I need to access the preferences files. I googled and found the default location of the preference file and also how to access it via Android Device Monitor. Somehow I am not able to open any folders under the File explorer tab of the Android device monitor. They just aren't responding. I tried waiting for ADM to load and tried again but no success. (Double click on folder is not working, STRANGE!) Do we need to configure

问题 I have 7 activites all with back and forth navigation buttons between the rest; activites consist of editTexts, Spinners, textViews, TimePickers, DatePickers, and checkboxes. I want all UI to be present and saved through navigation of an application instance; however on application termination everything needs to default. My 8th activity collects all UI and places into an email . . .fyi I have read alot about both onSavedInstanceState & SharedPreferences way of saving the data as activities

问题 Im using the "SharedPreferences" in my app to retain the ability to save/retrieve string values from multiple edittext boxes, and thats working just fine. I also have a Spinner in my activity with a string-array for it's usable values. But I am unclear on how to write the spinners selection to the SharedPreferences, then read the SharedPreferences later to retireve and set it's value. Here is the configuration I have for the edittext's: -Button to activate save values to SharedPreferences-

问题 SharedPreferences doesn't work correct in one existing apps. I tried many different ways but still not working. Always get default values app start again. It's working when I use same code in created new app. It's working all of other existing apps. Do you know why? String default_user = "Default_User"; SharedPreferences pref = this.getSharedPreferences("TEST_SHAREDPREF", MODE_PRIVATE); String user = pref.getString("user", default_user); Log.d("SHARED CHECK", user); if (user.equals(default