Android :: Understanding Content Providers ?

Mar 1, 2010

I am having trouble understanding content providers in Android. Do you use intents to call content providers as well as managed queries?

Also, an activity has an intent filter. The intent filter has a element which has a mimeType attribute. How does Android know which content provider this mimetype is referring to?
The tag in the manifest just lists an authority but not the full content_uri. Further, the content_uri is typically defined in an encapsulated class that seems to only consist of constants but no methods, so I don't see how that links over to the content provider class.

Android :: understanding content providers ?


Android :: Switching Content Providers For Same Content URI

Aug 12, 2009

This may seem like a stupid question but I need to be sure. I was wondering if it was possible to pro-grammatically change the Content Provider used when making a query given a Content URI. The reason being I need to know if it's possible to force the Calendar/Contacts applications to read from a different database via a different Content Provider temporarily while my application is running, so that I can reuse those applications to display my own data. Since the Content URI s are hard coded in each of these applications the only way it might be possible is if we could somehow temporarily change the Content Provider used for a given URI. I know this probably isn't possible, I just need to show it isn't. Could someone confirm this can't be done?

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Android :: Conflicting Content Providers

Aug 26, 2010

Everything is working fine, I can access the provider. The problem is that I want to create a demo version of my app and I want it to share the same content provider so when the user install the full version, the data is kept in sync. Also, it should be possible to install only the full or the demo version. Therefore, I have to include my content provider in both.Now, when I try to install both apps error message, obviously because both AndroidManifest declare the same content provider.Is there a way to tell in the Manifest that this content provider should be used only if it doesn't already exists ? Or another workaround ?A solution would be that the full version migrate the data from a demo content provider to the full version content provider, but I would rather avoid that.

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Android :: How To Set Permission In Content Providers?

Sep 21, 2010

I have a doubt regarding content provider.My doubt is I create a app1 that creates Content Provider and in second application(app2) i am using app1's content provider methods(like insert, update etc). It's working fine but i want to set some permissions in app1, so that if any other app wants to use that provider it must have to get this permissions(<uses- permissions) then only it should be able to use providers.

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Android :: Verify Content Providers

Oct 8, 2009

I've been struggling with what seems like a straight forward issue for some time now, and any suggestions would be appreciated.

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Android :: Get A List Of Content Providers On A Device?

Jan 4, 2010

Is there a way to programmatically list all available content providers on a device? No real use case, I just thought it might be neat to see what apps I have installed on my phone that have exposed content providers.

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Android :: Content Providers / Database Initialisation

Feb 18, 2009

I have a plethora of data which is currently stored in 1000 different very small text files, I want to store this data in an SQ Lite database as I feel that this will be more space efficient and hopefully time efficient as I presume a database query is faster than opening and parsing a text file (please stop me now if this isn't the case!). The data does not need to be available to other applications and will be used internally only. My first question is whether or not to create a content provider anyway, is there any benefit to this? My second question is where to initialize the database, is it possible to ship an application with a database included already populated? Do I have to populate it in the on Create method of the SQ Lite Open Helper subclass? If I have to include the 1000 text files and read, parse and insert the data at inst all time I have a feeling this would be slow. Is it possible for me to populate the database now, dump it to a single file and then bulk insert from the file in the on Create method?

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Android : Complete List Of Content Providers

Jul 27, 2009

Where can i get a complete list of content providers that Android offers out of the box? I'm looking for a content provider that list received SMS.

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Android :: Direct Database Access Instead Of Content Providers

Sep 2, 2010

Just found out that I don't need content providers if I don't need to share data with other applications. But since the examples I've seen all use content providers, I'm not sure how to proceed without them and populate activities with data derived from accessing my application's database directly.

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Android :: How To Test Content Providers On Android?

Aug 1, 2009

I am trying to test my DB using Provider Test Case2<T>. I can see the test DB being created. As such I suppose, the tested content provider should use the test DB. But as soon as I try any calls against the Mock Content Resolver (or the one created with new Resolver With Content Provider From Sql), I get an Unsupported Operation Exception. This is documented for the Mock Content Resolver as normal behavior. As such I am a bit unsure on the purpose of the Provider Test Case2. How do you test your content providers?

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Android :: Need Tutorials On Content Providers In Android

Apr 3, 2010

I am in desperate need of good tutorials on Content Providers in Android. I have been searching in the web for the tutorials but none could give me a clear idea on how content providers work. I'll be grateful if anyone can provide me with sample codes of the projects that implement content providers...

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Android :: Custom Content Providers In Android

May 4, 2010

I'm attempting to make a custom Content Provider so that more than one application (activity?) has access to it. I have several questions about how to do this, How do I declare in the code that it is a Content Provider? How do other applications (activities?) use or import the Content Provider?

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Android : Add IM Providers To Native App?

Apr 1, 2009

I'm just looking at the Android's native IM app and wondering if it's possible to create new providers? I know other people have written seperate IM clients but it'd be great to add to list in the native IM app.

The 3 I'd like to work on is Facebook, MySpaceIM, Skype.

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Android :: Sense UI - Understanding

Mar 26, 2010

I'm not fully understanding Sense UI. What makes Sense UI so relevant, or not relevant? What exactly is it?

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Android : Location Providers In Droid?

Aug 10, 2010

My application requires current location of the user. For this I have implemented the code and I am able to get the current location. The code tries to get the best provider first and then fetches location information. The problem is that the current location is returned from NETWORK_PROVIDER if GPS_PROVIDER is disabled. If both NETWORK_PROVIDER and GPS_PROVIDER are enabled then the best provider will be GPS_PROVIDER and this takes too much time to get the current location.

So, is it alright if we set the location provider as NETWORK_PROVIDER only so that it will not matter whether GPS_PROVIDER is enabled or not.

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Android : Get Location With Multiple Providers?

Feb 13, 2009

I want my app to be able to retrieve a fine location, but also to be able to get it's location as quick as possible. What I'm trying to implement is something like the way it works in maps, i.e. it gets a coarse location via network and then refines that location using GPS.

If I set the criteria to ACCUARCY_FINE it automatically tries to use GPS to get the location. The problem is that if a user is indoors then this may take several minutes, if it finds it at all. Is there an easy way to tell the manager to use network provider and then GPS, or will I have to do this myself? If so what's the best way to go about this? Will I need to thread it in some way?

I'm sorry if these questions have been answered already. I've found various location examples but none that seem to do what I'm asking.

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Android : Get A List Of Available Network Providers?

Jun 26, 2010

I'm trying to get a list of the available cellular network providers. Unfortunately i can't find any service or class that might help me out :( Does anyone have an idea on how to manage this? It has to be possible since you can see the list when you go to the settings on your Android device..

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Android :: Understanding Permission Group Tag

May 14, 2009

I need some help to understand the use of permission-group tag in AndroidManifest files. Is there any need of using permission-group and what benefit offers this grouping? Is there a plus security using it? Does anyone know an example when to use it?

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Android :: Understanding How Activities Work

Jul 22, 2010

I'm trying to wrap my head around activities and how they begin and end in Android. I've read what the Developer Guide has to say regarding activities and I'm still a little fuzzy on how I should appropriately handle their navigation in my application. As an example, say I have a main activity that starts a secondary activity. Once the secondary activity has completed it's purpose, I want to close it and return to the main activity. I recall having read that the activity stack was just that, a stack of activities that are pushed and popped. So I assumed that calling finish on the secondary activity would return me to my existing main activity. Calling finish on the secondary activity didn't actually do anything, visibly at least. Is there further reading that anyone can recommend to me? Chris Stewart cstewart@gmail.com http://www.androidsdkforum.com

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Android :: Understanding Parameters Of Images?

Feb 17, 2009

I am trying the FaceDetector class using the code as shown in the following link: http://www.anddev.org/quick_and_easy_facedetector_demo-t3856.html Everything works fine as far as the activity drawing the bitmaps is concerned but I haven't had any success in getting Android to recognize a face. Has anyone tried this feature? Could anyone please help in understanding the parameters of the images to use or please post a link to some image that has worked for them?

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Android :: Not Understanding Activity Stack?

Dec 3, 2009

I'm having trouble with my activities when they go in the background. I have two activities, A and B. Only A can launch B (manifest copied below).This is very confusing. It's like Android knows my app is running, and puts a new instance of A on top of the old B instance running. I'd just expect that the application gets paused in-place, and whenever the user hits the app icon again, it just picks up where it left off (in this case, just show B again!) Below is the manifest, and the activity classes for this test are completely empty (except A which has a button to launch B).

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Android :: Enable/disable GPS And Wifi Providers?

May 29, 2009

How do I enable/disable GPS and Wifi providers? I check to see if they are enabled by using this code:

locationManager.isProviderEnabled("gps") locationManager.isProviderEnabled("network")

If both are false, I'd like to turn enable the GPS provider and/or the Network provider so that the above checks would return true. Is this possible? If so, what permissions does it require?

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Motorola Droid : Consider Switching Providers For Android?

Oct 21, 2009

I'm considering switching from T-mobile to verizon for this phone. I was this close to getting the motocliq but this device seems to be much better as long as the keyboard is functional since I'm not even a social networker. How many of you are considering switching carriers for this phone and do you think its worth it?

Is it true there's a 30 day buyer's remorse period on verizon so if I just get it and don't like it for whatever reason, I'm safe to remain with t-mobile and not be committed?

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Android :: Understanding Broadcast Receiver / Way Of Activate It

Mar 25, 2010

I am trying to understand the use of the broadcast receiver and the way of activate it. There's two ways isn't it? Register it from an activity or declare it in the manifest. So my question is: If I code a broadcast receiver which is watching incoming messages and I register it in the manifest, when a message comes my broadcast receiver will catch it automatically although any activity of my app had registered it. In a nutshells, I don't have to activate it so it works, only register it either in the manifest or in an activity.

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Android :: Understanding Relative Layout - Add Four Controls

May 19, 2010

I'm attempting to add four controls to a layout; <label> <text> <seek> <radio> I want the seek widget to occupy all the available screen space between the edittext control and the radio control. However if I give it the value android:layout_width="wrap_content" only a small seek control is displayed and if I set the value to fill_parent it overwrites the radio control. I would have thought there would be a mechanism to occupy the free space between the text and radio controls dynamically. The xml file I am using is below You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en

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Android :: Understanding Bound Center Bottom

Jan 20, 2010

Trying to replicate the behavior of ItemizedOverlay.boundCenterBottom(), inside of one of my Overlay classes. I am fairly certain that I can do this using setBounds(), but I am utterly lost as to what setBounds() is actually doing.

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Android :: Understanding ContentObserver Life Cycle

May 9, 2010

The core of this Widget is an AppWidgetProvider which registers a ContentObserver to the CallLog content URI. This means that my widget is updated every time a call (incoming, outgoing, missed) is recorded. This works fine for a while, until *something happens* and my ContentObserver stops getting called (no error message seen in trace). I would rather that this ContentObserver persisted until the user removes the Widget.

I am guessing that my JVM has been destroyed (due to low memory?), ContentObserver garbage collected and/or ContentObserver unregistered (or just pointing to nothing), but I don't know how to debug this without restarting my code (and thereby re-registering). I can hide this bug by periodically re-registering my Content provider, but I would rather understand the cause and have a more optimal solution..............

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Android :: Understanding Life Cycle When Screen Goes Off And On?

Aug 4, 2010

My device is a Nexus One with 2.2 and I have tested two projects, one on 1.5 and one on 2.1. Problem: I have trouble to understand the life cycle of my application when the screen is turned off and on. Here is my output

// activity starts
08-04 17:24:17.643: ERROR/PlayActivity(6215): onStart executes ...
08-04 17:24:17.643: ERROR/PlayActivity(6215): onResume executes ...
// screen goes off
08-04 17:24:28.943: ERROR/PlayActivity(6215): onPause executes ...
08-04 17:24:32.113: ERROR/PlayActivity(6215): onStop executes ...
08-04 17:24:32.113: ERROR/PlayActivity(6215): onDestroy executes ...
08-04 17:24:32.983: ERROR/PlayActivity(6215): onStart executes .....................

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Android :: Group Apps To Get More In Depth Understanding

Oct 6, 2010

I am a beginner in writing Android apps and would like to be a part of the group to get a more in depth understanding.

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Android :: Understanding Proper Alarm Flow

Jan 11, 2010

the app I'm trying to implement allows the user to select a sound file (MP3 or WAV) to play at a specific date and time showing a dialog with a progress bar and an OK/Cancel button allowing the user to stop the playing of the sound file. I want it to behave something like the countdown apps I've seen or even the built-in alarm clock app. As I'm implementing this simple (I thought!) app, I'm trying to better understand the platform and make the application conform to the Android way.

As I've been writing the app, I learn more about how things are supposed to work on the Android platform. And here's where I'm getting a bit confused. During my attempts to get the alarm to fire and display, I'm learning that properly formed Android applications are not supposed to show dialogs as a result of a background service or broadcast receiver being invoked through Android's alarm service. Instead, I think, the app is supposed to use a notification on the status bar to alert the user. The user then has the option to look at the notification to see what the app is trying to tell them..............

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