Android :: Model For AppWidgetProvider
Aug 2, 2010
I have a widget that shows some data fetched from the Internet. I may have multiple widgets visible on the screen, each displaying some data, partly the same as the other widgets. From time to time I re-fetch the data from the Internet and update the widget views. I've modeled this in an MVC style: I have a model which I can invoke a "re-fetch-data" on, and which the views listen on. My questions:
A) Is it wise to let my model be a singleton?
B) Can I rely on that all widgets are served by the same AppWidgetProvider? Or may some of my widgets get served by a different AppWidgetProvider instance? Or, more generally: Is there any guarantee that there will be only one instance of my AppWidgetProvider? If there is only one instance of my AppWidgetProvider, then I could use an instance variable here for the model, and pass either my AppWidgetProvider or the model around where needed. Perhaps a better option?
C) In the AppWidgetProviders onUpdate method, can I be sure that the same "context" object is passed as argument each invocation?
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Apr 21, 2009
I have a general question. Is it possible to set the RemoteView of the widget to a WebView? My goal is to push real time updates to the WebView via the comet technique (HTTP long polling), similar to how Google Talk does it on the desktop browser I suppose. Do you think battery life would be significantly impacted with this approach?
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Oct 2, 2009
I have an app widget that extends an AppWidgetProvider to create an application widget.
I would like the application widget to be idle until an activity in my app runs; actually when a service in my app is started.
Once that service is started, I need to "wake up" the application widget and communicate with it (i.e. tell it things to display).
So I see that AppWidgetProvider simply extends BroadcastReceiver -- so does that mean:
1. I need to call registerReceiver in my service and tell it to filter for certain kinds of events?
2. Can I even do #1, or will an AppWidgetProvider *only* accept ACTION_APPWIDGET_* intents?
3. If #2 is correct, how can I communicate or "wake up" / trigger the application widget?
4. Can I send events to my app widget using sendBroadcast( intent )?
Then, my app widget has some buttons on it, I need to send an intent back to the application (or service). I see you can do that with PendingIntents, but if i send the different intents it to the same Activity, it seems to re-use the first created pending intent.
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Nov 8, 2010
I would like to pass a value from the AppWidgetProvider to a service. How can I do that? This value is taken from the widget configuration. If this value changes (by going to the configuration again), how do I pass it back to the service? Is there another way to do this?
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Jan 1, 2010
Here is my issue, I want to be able to update a specific AppWidgetProvider (home screen widget) from a custom service class. I have to build the remote view in the service because I'm also doing some networking in there, which takes some time. The problem is that I can't figure out how to update a specific widget (individual widgets can have different update intervals, using the alarm manager). If I wanted to do it from the onUpdate of the AppWidgetProvider I could just call appWidgetManager.updateAppWidget(appWidgetId, remoteView); Does anyone have any experience with this or any suggestions?
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Nov 13, 2010
I am making a clock widget for the android home screen using AppWidgetProvider. I have it calling the TImerTask class that updates all my values using this code:
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds {
Timer timer = new Timer();
timer.scheduleAtFixedRate(new MyTime(context, appWidgetManager), 1, 1000);
}
In the TimerTasks run() I am setting a bunch of text views to the relevant values. My problem is that this seems to work fine, but it makes my home screen unresponsive, probably due to updating it every second. How do I fix this and still have it update the display at the correct time? (I only need to see minutes not seconds, but I want the minutes to change at the correct second.)
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Oct 30, 2009
It seems like the convenience functions (onUpdate, onEnabled, etc.) aren't being called in the emulator on Android 2.0. Is this a bug, or are these functions just being eliminated? It would have been nice to see this documented somewhere.
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Aug 6, 2010
Anyone know if it is possible to add AlertDialog within a AppWidgetProvider class? Here is the code I am working on where I start the AlertDialog on onEnabled function call.
@Override public void onEnabled(Context context) { super.onEnabled(context); Log.v(TAG,"onEnabledWidget"); AlertDialog.Builder builder = new AlertDialog.Builder(context).setIcon( android.R.drawable.ic_dialog_info ).setTitle(R.string.app_name) .setMessage("This is testing") .setNeutralButton("Confirm", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { } }); alertNotSmc = builder.create(); alertNotSmc.show(); //runs when all of the first instance of the widget are placed //on the home screen .........
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Jul 14, 2010
I'm slighty puzzled about how android's AppWidget machinery works. I reimplemented the AppWidgetProvider's constructor like this:
public class MyProvider extends AppWidgetProvider {
public MyProvider() {
Log.d("TEST", "Creating...")
}
public void onUpdate(..., int[] appWidgetIds) {
// updating stuff here
From what I've read in the docs, I understood that AppWidgetProvider is instantiated once, when widget of that type is added for the first time. If another widget of the same type gets added, it will be managed by exactly that provider.But I just discovered that this is not the case. For each widget I add, android creates a new MyProvider (I see that from 'adb logcat' - it prints "Creating..." for each widget)!I don't understad why. Maybe I got something wrong? Or documentation isn't clear on something. What's the reason of having appWidgetIds passed to onUpdate and other methods if each provider is managing only ONE widget?
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Sep 30, 2009
From a service that's running, how do I send an event or an intent to an app widget that is just sitting their idle.
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Nov 23, 2009
I have built a widget that contains a button and an editable TextView (that behaves like an EditText) much like the native Google Search bar widget. How can I access the text that the user has typed into the TextView? In an Activity I would just use findViewById(), but of course I can't do that in the AppWidgetProvider. (I get the error message "The method findViewById(int) is undefined for the type Widget.") So I tried to solve it by using a million casts, like so: String str = (String) ((TextView)((Activity) context).findViewById(R.id.txt_input)).getText(); Unfortunately, with that line present my app crashes. What is the correct way to get references to those Widget elements? I've read all about RemoteViews and Widgets and looked for examples where somebody does this (which seems like it would be common, but I guess not) but I haven't turned up a solution. What am I missing?.....
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Feb 2, 2010
I am attempting to signal my widget such that it receives my new Intent from my service
The code I am using to send from the service is as follows:
CODE:...........................
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Aug 7, 2009
I was trying to set a progress bar to View.INVISIBLE or View.GONE, or View.VISIBLE inside an AppWidgetProvider. However, it doesn't seem to want to do it. Setting visibility works fine with TextView fields or ImageView fields or ImageButtons. However, ProgressBar doesn't seem to work. It doesn't make sense that just the progress bar type isn't supported for controlling visibility. Has anyone else seen this problem?
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Jun 5, 2010
I would like to create a Home Widget containing a ListView, but I don't know if this is possible and if it is, how to do it. I was using a ListActivity and it was pretty simple, but can't figure out a way to do it using AppWidgetProvider.
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Feb 14, 2010
I'm writing a widget where i first have a configure screen where the user makes a selection. Then I want to pass that data on to the actual widget. This must be really simple but I just can find out how to do it.
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Dec 30, 2009
My app has a 1*4 icon size widget. When a user tries to add a widget I provide with a configuration screen. and some data is collected - it is verified by the server - it is added to the local DB with appWidgetID as the key - all is good. when user hits save, if there is not enough space, he is given a polite toast - "No more room on this home screen". Now my problem is that the application is not informed of this. Application still assumes the widget was created and sits back and wait for the broadcast to update the widget after certain amount of time.
Can anyone tell me if i can find out via a broadcast or a call back or any method possible to determine if the widget was not successfully created, so that i can mark that record in my DB as deleted. Or better if i can know the space available beforehand via some magic ninja code. my whole application design is disturbed because of this problem.
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Aug 26, 2009
I know I can save information in a static attribute in a widget, however, is there a way for a widget instance to save the state information similar to the Activity onSaveInstanceState(Bundle outState) method? I don't want to write to a database for this state information.
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Dec 31, 2009
Is it possible to access the content resolver methods in a class extending from AppWidgetProvider class? Have been trying to do it with no luck so far.
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Apr 5, 2013
I read from my web space from a text file and paste it in TextView.Everything works.
But now I want the (AppWidgetProvider) in my widget insert. My widget has a TextView.
So how can I connect a AsyncTask with a AppWidgetProvider?Tried it. But the app crashes from then.
My MainActivityl.class with AsyncTask it reads. And my AppProviderWidget.class
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Dec 3, 2011
Basically what I am trying to do is use a customer font in AppWidgetProvider to display a custom number font in my widget. The issue I am having is that getAssets is not allowed inside of AppWidgetProvider. I have read alot on google and forums about using custom fonts, it seems to be possible but not easy.
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May 11, 2010
Analogue to this one (http://stackoverflow.com/questions/2788345/replacing-xml-in-file-from-document-in-java or http://www.exampledepot.com/egs/javax.xml.transform/WriteDom.html) I try to use it under Android. The problem is, that I can't use the suggested solution under android, because it throws java.lang.verifyError. After reading a little bit, I found out, that the class that was used to store the data to file, is not usable in android. can you suggest another solution, which is similar easy to use?
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Aug 31, 2010
How do I find the make and model of an Android device?
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Feb 13, 2009
I would like to know the device model number for android devices like "model number" = 'T-Mobile G1'. can any one please tell me how to do it.
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Dec 14, 2009
Is there a way to detect the device model of a user through Java code on Android? To return htc-magic or htc-dream or something like that, somehow? I have been trying to detect this through the user agent when the client is accessing an web page, however this is always Java0 through Android. Has anyone done this? Any ideas?
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Feb 1, 2010
Let me start by saying that I'm sure this has been covered but a search revealed nothing and an updated discussion can always help. So again, sorry for covering treaded ground, but here we go.I'm leaving my job and giving up my company blackberry - so I need a new phone/carrier/the whole package. I am at this point pretty darn addicted to smartphones and use them heavily for web browsing, email, maps, twitter, playing music, and scheduling myself (I don't really play games though). While my blackberry curve was leagues better than my old Windows Mobile-powered-Wing it still has left a lot to be desired. I need a step up.So its basically iphone vs an Android phone and while the iphone seems to win in nearly all the benchmarks out there, I just can't get past the Apple Tax, closed platform, non-replaceable battery, and my general Google fanboy-ism. I could also see myself developing OSS apps at some point - which Android has the more compelling story for.Further research has lead me to view my options as the Nexus, HTC Droid, or Eris. The Eris - although it has great reviews - just seems a bit kiddie so it's a distant third.My concerns are in this order* Good hardware (I'm ok with an onscreen keyboard unless the touchscreen sucks)
* Total cost of ownership
* Ability to use at my new job (meaning syncing with Exchange Server - though this shouldn't be a huge problem)
* Snazzy Operating system.
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May 7, 2010
I am integrating Paypal into my application for in-app purchase. I am using Paypal Mobile Checkout for this purpose. I will like to know whether Android Market will approve this kind of application which uses a payment gateway other than Google Checkout. Can anyone let me know where I can find information related to this?
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Oct 19, 2010
My contract with T-Mobile UK is up for renewal & i think its time to upgrade from my beloved G1 to something else, Question is, What to? Over the past few months i have been looking at many different phone's and i have no idea what to go for. Basically I'm after the following from my phone:
*Android 2.1/2.2 Based device
*Physical Keyboard
*Vanilla/Stock Android (No UI)
*Better Battery Life then my G1. The phones I've been looking at are the Motorola Milestone, Milestone 2 & the HTC Desire Z/T-Mobile G2. The only thing with all all of them is they all feature a new UI (Either MotoBlur or Sense) which I'm not after. I thought i had solved all my problems with the T-Mobile G2 (the Desire Z but with just Stock Android) until I found out its for the US only. Is there any other models that anyone can recommend or am I just going have to put up with not having Stock/Vanilla Android?
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Jul 23, 2010
In the same way a web or desktop app might have 3 or n tiers - UI, Business, Data for example - what is the suggested structure for an Android application? How do you group classes together, what layers do you have etc.? I'm just starting Androi dev (an internet based app that must respond to incoming notifications) and have no real feel for the structure I'm aiming at.
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Apr 18, 2010
For an example of what I'm looking for, hit the Home button while you're composing a message in the Gmail app. A little message will pop up at the bottom of the screen for a moment that says "Message saved as Draft."
I can't figure out how to display one of those messages myself, and I'm not sure what to call it so I can't do a search for it.
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Jan 3, 2010
I would like to know if there is a way for reading the Phone Model Pro grammatically in android. I would like to get a string like HTC Dream, Milestone, Sapphire or whatever.
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