Android :: Notifying An ArrayAdapter Of Changes When Closing A PreferenceActivity
Dec 12, 2009
I have a ListView that has some minor visual preferences that are set in a PreferenceScreen. These preferences are simple booleans to show or not to show some specific TextViews on each item in my ListView.
Anyhow, when these preferences are changed, I need to notify my ArrayAdapter that the data has changed in order to get the list redrawn. However, doing this via an OnSharedPreferenceChangeListener wouldn't really be optimal because there are several preferences that you can change, that would cause an unnecessary amount of updates to the ArrayAdapter.
So, to the question: How can I identify when my ListActivity has occurred on the screen after closing my PreferenceActivity, which I then could use to check for changes in the preferences, and only then notify the ArrayAdapter.
The ArrayAdapter being an inner class of my ListActivity, which is set as a ListAdapter.
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Apr 10, 2010
So I am modifying the Cube live wallpaper example. I have a class that extends PreferenceActivity, and I added the Activity in my manifest file. I keep getting ActivityNotFoundExceptions.
Here is my preference classcode...
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Jan 27, 2010
I am testing my application on a Nexus One and i have some problems. My theme is Light and when an inner sub PreferenceScreen is displayed, the window background becomes black instead of keeping the PreferenceActivity's one.
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Apr 3, 2009
I'm using a PreferenceActivity with a PreferenceScreen defined in a xml file. i want to make sure that the data set on a preference editor are valid (integer , integer in a range....)
So , i want to be able to intercept a click on a button of the EditTextPreference , check the validity of the data and if the data is incorect , display a message to the user and come back on the EditTextPreference.
What would be the best way to achieve that?
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Jul 19, 2010
Jeff Sharkey in this post (http://goo.gl/G3wt) shows how to create save application preferences in database by hack on PreferenceActivity.
It said i can use a ContentProvider, too.
Can you give me an example on how to save preferences from PreferenceActivity to ContentProvider?
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Jun 12, 2009
I have a PreferenceActivity building screen hierarchy from code, and I need to force display hierarchy change dynamically when one of SharedPreference value changed. I know this might be a kind of easy question, but I couldn't find answer anywhere in documentations or discussion.
My PreferenceActivity is forming like this. code...
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Mar 16, 2010
I am having a problem with an application I am in the middle of writing which is causing me some serious headaches.
The situation is this:
The application allows the user to configure several different kinds of information in several activities.
One of the activities, which is a subclass of Activity, takes data from the user and stores it in a shared preferences instance that I create manually and edit in code. This activity requires a complex screen layout that I do not believe would work well with a PreferenceActivity, hence me rolling my own in this case.
Another one of the activities, which is a subclass of PreferenceActivity, is a straight forward list of preferences, each with a list options - standard stuff.
I am finding that any data that I store from the first activity, my bespoke preference screen which manually adds the data using a StoredPreferences.Editor instance is overwritten once the user selects an option in my activity that extends PreferenceActivity.
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Aug 5, 2010
Currently, I'm using the following code across all of my activities in my app to store application level variables and carry values between activities..
prefs = this.getSharedPreferences("MyPrefs", Context.MODE_PRIVATE);
I didn't have a PreferenceActivity prior to this, but now I do and I am looking to store a few user prefs from this new PreferenceActivity in the same sharedPreferences tag, "MyPrefs".
I know I can access the PreferenceActivity SharedPrefs from my activities via
prefs = PreferenceManager.getDefaultSharedPreferences(this);
but I would like those values saved to my current sharedPreferences tag, "MyPrefs", but I'm not sure how to do this.
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Apr 12, 2010
I have a PreferenceActivity with a bunch of (Sub)PreferenceScreens. Each such (Sub)PreferenceScreen represents an account and has the account-username as its title.
CODE:................
As the user enters sub-PreferenceScreen, and edits the account user-name, I want the outer PreferenceScreen to update it's PreferenceScreen-title for the account in question.
I've tried to add...
CODE:.............
But the accScreen.setTitle does not seem to take effect on the outer PreferenceScreen. I've note that calling onContentChanged(); actually makes it work, but I realize that this is probably not the preferred way of doing it.
I suspect I should call postInvalidate() on some view somewhere, but I really can't figure out on what view and when to do it.
http://stackoverflow.com/questions/2396153/preferencescreen-androidsummary-update may be experiening the same problem as me.
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Feb 7, 2010
I'm trying to generate a notification which vibrates the phone and plays a sound when the screen is off (cpu turned off). According to the Log messages, the notification is being sent, but the phone doesn't vibrate or play the sound until I turn the screen on again. I tried holding a 2 second temporary wakelock (PowerManager.PARTIAL_WAKE_LOCK), which I thought would be ample time for the notification to be played, but alas, it still doesn't.
Any pointers to get the notification to run reliably? I'm testing this on an G1 running Android 1.6.
Code I'm using:
CODE:.................
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Sep 9, 2012
is there a way to change the main activity background using preferences?I search everywhere and tried everything i could imagine but nothing works.
I want to enter in my preferenceActivity, choose "change background", open the phone's gallery, select a image/photo and set it as the "wallpaper" of my application.
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Sep 17, 2010
I have a situation here where i have an intent A that calls intent B. In Android 2.x, the application B consistently crashes the dawvik virtual machine when it runs the second time. Then, if A calls B again, it works.
Is there a way to let A find out that the vm has crashed? This way, i could just redo intent B.
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Oct 8, 2009
I just tried a stupid approach and it crashed my app... Basically I have an activity that has three tabs (containing three activities). Each of the tabs gets its input from an xml file downloaded off the net. Everything is fine but when I start my app, it has download the xml file and there's a "wait" time for this.I managed to get around this by adding a splash screen. It looks beautiful but the problem is when I click on the second tab, it still has to get the list off the net, so it looks ugly now... It waits before displaying the list. So what I did was design an AsyncTask that just downloads the xml file. In my main activity, I spawn two tasks initially and send the URL and Intent as parameters. And inside the activities that start inside the tabs, I use a wait(). Inside the AsyncTask, after it is done with the download, I notify the Intent using notify(). This crashed! Of course, I didn't expect it to work but just wanted to try :) Writing it so that I can either get a feedback as to why this failed or to prevent others from wasting their time on this...Now, I am sure many face the problem of a "wait" time inside the tabs. How do I solve this? I am thinking of either dimming the screen and then displaying a series of toasts or display a progress indicator inside the tabs or pre-fetching the xml files... I don't have a clue on how these can be achieved.
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Nov 19, 2010
I have 2 gmail (apps) accounts on my phone.The first account: I want to know when I get an email.The second account: I don't want to know when I get an email - but still want, for checking and sending only when I look at the account.Is it possible to disable notification on one account and keep the other?I've got a Sony Xperia X10 Mini Pro and have waited a looooong time to get 2.1, JUST for the multi email accounts capability - now that I've got it, I'm not liking it because I get disturbed when I get email on the second account.
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Nov 13, 2009
I think I've missed something in how Android is supposed to work! I have the main Activity with a menu option that opens the preferences screen. What I need is a way for any changes that were made to be communicated back to the main Activity as soon as the preference is activated. At the moment the only way I could get it working is by using the intent data that gets sent back when the prefs activity closes but this isn't really enough. The reason why it needs to be instantaneous is that one of the preferences is a 'Clear cache' button, so I would like the data to be deleted when the user requests it and no later!
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Apr 10, 2009
I'm running into difficulties overriding an ArrayAdapter to be displayed in a ListActivity. The ArrayAdapter is filled asynchronously. What I'm trying to do is add a special "sentinel" object that sits at the beginning of the list to show the progress of the computation. Ultimately this may be a progress bar, but right now I am just using a TextView as a placeholder. The problem is that the sentinel seems to get inserted multiple times into the list - not just once at the beginning. It *seems* to be appearing once per "page" of list data (so if 8 list items fit on the screen, my sentinel appears as the 1st, then 9th, then the 17th, etc..), but that interpretation may not be accurate. While maybe not how ArrayAdapters were intended to be extended, I thought something like this should work by simply overriding getView() to show my custom TextView for index.
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Sep 3, 2010
I have the current code...
How would i put a vector into my array_spinner?
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Jun 16, 2010
I have a strange problem with one of my ListActivity. I have overrided the default ArrayAdapter in order to customize my list. I have then filled the adapter with an ArrayList.
If I insert an element on the list and then call notifyDataSetChanged() on the adapter everything works fine.
But if I insert an element at the END of the list and then call notifyDataSetChanged(), the new element doesn't appear ...
And finally if I override getCount() on my adapter like this :
CODE:...............
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Apr 19, 2010
I need some simple databinding for a Spinner. I want to display 2 items for each dropdownitem.
So when the user clicks the spinner I get a list like code...
I understand this can be done when using a Cursor, according to the databinding info on android dev. Like code...
However, I don't get my data from a database, so I don't use a cursor, I use a ArrayAdapter. Unfortunately it looks like there is no support for databinding with this adapter.
Is there a way to do this?
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Dec 7, 2009
Is there a way to prevent google voice from notifying me of or stop recording blank messages?Every time someone calls me and hangs up I get a voicemail alert including empty transcription even though nothing is there.
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Jan 21, 2010
Lately my gmail app has stopped notifying me when I receive an email. I have to go in and refresh it to get my email to pop up. I checked the settings and it is set to notify me.
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Mar 24, 2010
I cannot get my Hero to give me notifications that I have Voicemails to listen too. I just got this thing a week ago and was beginning to wonder why I hadn't gotten a voicemail in that long since I don't answer every call. Well last night I discovered that I had a bunch of them but it's not letting me know. I did the setup like it instructed when I got the phone. Anyone else ever have this problem and if so, how did you fix it? Thanks.
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Oct 13, 2010
I have HTC mail set up to access my googlemail account and it is set to check every hour for new mail.
When the phone is rebooted everything seems to work fine but then after a while it appears that the phone will stop checking for emails on the hour.
If I go into mail it will retrieve them at that point but it should have picked them up several hours ago.
The problem only seems to have been occuring the past week or so but I cannot figure out why.
The only things that have changed are the OTA update and returning from holiday abroad but I cannot see how this would have affected things.
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Jan 17, 2012
I don't know why but suddenly my gmail app is not notifying me of new email. When I open the app it isn't even showing that I have new emails even when I can look on my computer and see that I do. Is there a fix for this? I haven't changed any settings on my phone or on the app that would have caused this to my knowledge.
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Aug 19, 2012
I get hundreds of emails every day and I currently get a notification but no audio tone or vibrate as it would be going crazy. This is how I want my general email notifications set up. So that part is fine. What I do want however is for starred messages to play a tone/vibrate similar to my text messages. I went into Gmail and then Manage Labels within the menu and I confirmed that 'Starred' is set to sync all and ring, vibrate, notify once. This to me seems like it should be notifying the way I just described that I'm looking for but there is no different notification for starred messages the way I had hoped. What am I doing wrong here?
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Aug 13, 2010
I am using an ArrayAdapter<CharSequence> to populate the items to list in a android.widget.Spinner. That works all fine. But now I want to keep the list of items dynamic, i.e. I want to be able to add/remove items from the selection list at runtime. However, when I call adapter.add(item) or adapter.remove(item) I always get a UnsupportedOperationException, even though the Javadocs of the ArrayAdapter class describe these two methods as to be usable for exactly that intended purpose.
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Oct 19, 2010
I need a gallery to be able to hold up to thirty custom views. These views need to added or removed whenever, they also need to be able to be display in a display bow beneath the gallery. How do I do this?I looked at the doc file for arrayadapter but it requires me to use a reference Id for each view I add, but each view is all java coded. Should I just use setId upon creation of the view and just throw that id into the array adapter, or is there a way to create one without using resource id's?
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Sep 18, 2009
i m having Array Adapter it displays list views normal whenever i click on that particular item from the list it doesn't works.can u tel me how to solve this.
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Apr 27, 2010
I'm trying to filter my ListView which is populated with this ArrayAdapter:
CODE:............
However, when I call filter('test') on the filter nothing happens at all (or the background-thread is run, but the list isn't filtered as far as the user conserns).
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Nov 4, 2009
I have subclassed ArrayAdapter to set the color of text to RED if the string does not contain 100%, this has been added to a ListView. The problem is that some of the rows show as red when they contain 100%.
CODE:.....................
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