Android :: How Preferences Activity Works
Jan 19, 2009
I'm having a hard time trying to understand how the preferences activity works. Right now I have an activity for my preferences using a XML layout that has this:
CODE:............
The thing is that everything I do in the preferences are saved. I can reboot the emulator and I can access the preferences. I want to know how can I access this key from another activity on my application.
This is my activity:
CODE:.................
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Nov 4, 2010
Is it possible to use the PreferenceActivity and PreferenceScreen to manage multiple instances of preferences fro a single app? It seems that they store preferences as "default" preferences only. I would like to use a PreferenceScreen as my configure activity for an AppWidget, but I need to be able to store distinct preferences for each widget.
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May 20, 2010
My problem is that when I start application and user didn't open my PreferenceActivity so when I retrieve them don't get any default values defined in my preference.xml file. Code...
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Oct 19, 2010
When you establish a shared preference such as below.
public static final String PREFS_HI = "MyPrefsFile";
Can you access it from other activities just like you would normally do?
SharedPreferences settings = getSharedPreferences(PREFS_HI, 0);
Or is there something unique that you must do to access the preferences?
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Jul 8, 2010
What I want to do is I am working on a game of life program. I want to take the time delay and make it a preference, but I want to make it available for people to type in a specific time. The number can be in miliseconds or seconds. However I'm a little stuck on how to proceed, I haven't been able to find a simple preference that already handles this, but there might be one. Is there an easy way to make this preference and confirm that the entered data is an integer or afloat?
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Apr 22, 2010
I am using a PreferenceActivity to let the user set some values. I am feeding it the xml file with the defined preferences.
I have set all the android:defaultValue="" for them.
When I start my application, I need the preferences, or if they are not set yet manually, I want the default values:
CODE:.................
However, when android:defaultValue="true" I still get false. So, it looks like the defaultValues set in the XML are not used anywhere but when initializing the preferences-screen.
I don't want to hardcode the default values in the getBoolean() method. So, is there a way get the default-values with only defining these in 1 place?
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Mar 19, 2010
My application is used on multiple platforms so it saves it preferences to a file (rather than to the standard Android SharedPreferences).
Is there any easy of reusing the PreferenceActivity to save preferences to a file or is it a case of creating a whole new activity to do the job? If the latter is the case is there a layout I can use that will make the activity look like the normal preferences screen? PreferenceActivity uses com.android.internal.R.layout.preference_list_content but this doesn't appear to be available to apps for reuse.
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Apr 10, 2010
I am using a PreferenceActivity to show some settings for my application.I am inflating the settings via a xml file so that my onCreate (and complete class methods).These preferences will automatically save to SharedPreferences as the user interacts with them. To retrieve an instance of SharedPreferences that the preference hierarchy in this activity will use, call getDefaultSharedPreferences(android.content.Context) with a context in the same package as this activity.
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Nov 5, 2010
GI am trying to do a http post to a php script. the method works if I place it in the onCreate event of the application but gets a ConnectionTimeOut error when it tries to execute it from the service.
Here is an example of my method
CODE:...................
I have no idea why the service would get a time out error but the application activity would not.
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Jun 23, 2010
My android application has two kinds of preferences:
1) I have user preferences defined in res/xml/preferences.xml so that users can manage their preferences with a PreferenceActivity.
2) I'd like to define another file for global configuration preferences of my app.
What is the best way to manage my app config preferences? Should I create another XML file with config values or should I specify those config values in strings.xml? What is the best practice for managing config preferences?
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Jul 16, 2010
first of all: yes, I read all the other threads on this topic. And not only those from this site... (you see, i'm a little frustrated) Most of them come with the advice to use "android:id" instead of just "id" in the xml file. I did. From others, i learned, that View.findViewById works different than Activity.findViewById. I handled that, too.
in my location_layout.xml i use
<FrameLayout .... >
<some.package.MyCustomView ... />
<LinearLayout ... >
<TextView ...
android:id="@+id/txtLat" />.................
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Nov 8, 2010
I am attempting to add a simple preferences file in a new Android project (New -> Android XML File), but it doesn't appear to be working correctly.
There is no root element to choose from when I select the Preference type layout. If I press Finish, it doesn't do anything. See screenshot below.
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Oct 5, 2010
Is there a way to use ListAdapter in preferences screen ? or i must use only chekboxpreference, textpreferences, etc....
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Aug 6, 2009
Can any body know how we can use the preference & widgets together .
I want to use preferences to show like a list & want to show buttons at the bottom of similar screen?
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Oct 15, 2009
How I can access and modify the system preferences (the options you see on system 'Settings' application)?
Cheersss, Armond
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Jul 9, 2009
I would like to give users a choice of starting one of three different activities by choosing from three mutually choices. And I would like to provide users these choices as Preferences. If I use CheckboxPreference, user can select more than choices. Something like "RadioGroupPreference" would be good but it is not available from SDK. Can mutually exclusive preferences be implemented? Pointers or suggestions are greater appreciated.
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Feb 26, 2009
I'm trying to give an option to users to be able to change the theme to the light one. I can't find any command or anything for this. I know I can set this in the Manifest file but this is not what I'm looking for.
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Jan 22, 2009
I'm having this problem with one of my apps where some people are reporting that their preferences are not being saved when they close and resume the app. The preferences theyre talking about happen to be actual Preferences (i.e. the built-in preferences manager for an activity). They say they're not doing anything special, just exiting the app and going back to it. Does anyone know why the prefs wouldn't be saved for only this select few people? I'm at a complete loss.
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Mar 7, 2009
Is there a way to launch a dialog (say, the dialog I show to users the first time they launch the app) from a preferences entry? I don't see any examples doing this in the API Demos, nor have I seen it out in the wild. I do see a class called DialogPreference, but this doesn't seem to be what I want.
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Jan 21, 2009
In a preferences screen in my application which is build by extending the PreferenceActivity i need to change background on the window itself and on the PreferenceCategory. How i can do it via Themes/Styles ? Which attributes i need to define ?
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Sep 16, 2010
I downloaded launcherpro, and there is no application icon with the rest of my apps. I wanted to fix my screens and stuff, but I cannot find the preferences for the app. I cant even find the app on my phone. It changed my home screens from 7 to 3. Is there only a way to get to the preferences by purchasing LauncherProPlus?
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Mar 1, 2010
I'm trying to make a somewhat advanced settings Activity (one that has a RadioGroup in one of the cells). The layout xml file contains the following:
CODE:.......
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Nov 2, 2010
I'm trying to remove a preference from the screen so it isn't visible if the user is using an SDK greater than 2.2. I've found several answers saying that getPreferenceScreen().removePreference(thePreference) will work, but I'm getting FALSE returned every time I try it. Am I using it in the wrong place?
Any clue from my code?
CODE:.................
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Jul 28, 2010
I want to know how we can use shared pref in different application.
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Sep 6, 2010
Does Android provide smth. like that OR do I have to check every time during start of my app "Oh, am I freshly installed? Do I have to initialize the Shared Preferences now?"
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Oct 29, 2010
I have a user preference in my app, which gets ued by different activity. I would like to know the best way to utilize those preferences between different activities in my App.
I have this idea to create a shared preference object from the main activity and from there send intents to the different activities to take actions. would it work?.. or just keep calling getsharedpreferences() from every activity?
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Oct 18, 2010
I've just created some preferences using the PreferenceScreen XML following the Earthquake example from Wrox's "Professional Android Development" book.
Using the emulator, how do I accept the preferences?
If I use the back button I return a Activity.RESULT_CANCELED. So which key returns the Activity.RESULT_OK code?
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Jul 14, 2010
I know only primitives can be stored in the android preferences, but do arrays count? Can I store an array of, say, Strings or booleans in an android preference?
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Apr 30, 2010
I seem to be having trouble reading preferences from my AppWidgetProvider class. My code works in an Activity, but it does not in an AppWidgetProvider. Here is the code I am using to read back a boolean:
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
boolean autoreplyon = settings.getBoolean("autoreplyon", false);
However, I get the "The method getSharedPreferences(String, int) is undefined for the type widget" error (widget is the name of my AppWidgetProvider class).
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Mar 8, 2010
I am creating a simple Android widget with a typical usecase of having many instances of it running at once.
Using the stock preferencesmanager, it seems each instance of the widget shares the same preferences.
Is there any way to not have this happen?
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