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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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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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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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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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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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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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.
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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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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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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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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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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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Jun 22, 2009
i hook up my G1 to my laptop and open a 'adb shell'. But as I execute the command 'cd /data/data', I get an error 'opendir failed, Permission denied' adb devices List of devices attached HT853GZ21556 device .I tried to cd the the right directory and then do 'sqlite3 <mydatabase>.db'.How can i dump the content of the database on a real device?
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Nov 22, 2010
Since I've seen a presentation from Google IO I'm a bit confused in the question, if it's better to use content providers or databases. Or it makes no difference if I don't want to share any data with other applications.
If I've understood it right, content providers based on SQLite DBs and it's also possible that content of them is only accessable for my application.
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Sep 4, 2009
I am writing a content provider for this application and in my content provider I am opening a database connection, running a query and returning the cursor of results to the calling program. If I close this database connection in the provider, the cursor has no results. If I leave it open, I get "leak found" errors in my DDMS log. What am I missing here? What's the clean, proper way to return a cursor of database results?
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Nov 3, 2009
I been working on this code dealing with my database for days i can figure out whats wrong. Heres my code: package com.helpihelpyou;
import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.SQLException; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteException; import android.database.sqlite.SQLiteOpenHelper; import android.database.sqlite.SQLiteDatabase.CursorFactory; import android.net.Uri; import android.provider.Contacts.People; import android.util.Log;
import java.util.ArrayList; import java.util.List;
public class HelpiDB {...........................
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Oct 8, 2010
I want to get a code of content provider which a database is created. I am using the tool which located here tools/sqllite3.exe to check if the database is created.Please let me know the step by step procedure for this thing.
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Jul 28, 2010
i have done SQLite database programming for Android, but i dont know anything about Content-Provider except this: "As i have referred Android Developer page , Android SDK explained about "Content-provider" as it is used to store and retrieve data." What is the exact difference between "Content-Provider" and "SQLite Database"?Which is best to store data, when ?
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Dec 9, 2009
Not sure of the absolute utility of this but seems as though it should be possible and useful. Can you extend ContentProvider to provide URIs representing new queries (i.e., joins across multiple tables not specified by existing URIs) for an existing system database? The alternative seems to be that I need to write a series of cursor queries then join them -- seems like a lot of unnecessary code duplication.
I have been trying this for the contacts database as an exercise, but no love so far. The crux seems to be that I cannot open a database in another package during the setup phase. Am I just completely out in left field here? It's possible as I am new to both Java and Android.
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Aug 7, 2010
I understand, at least on paper, the basic difference between the Content Provider and just directly accessing the SQLiteDatabase. I have a functioning prototype for my application, and currently it is just directly hitting the database. I don't really have any experience using the Content Provider pattern, but I have found out that I will need to share some data with another application.
I will only be sharing about 2 out of a dozen or so tables, so I was wondering if I should be just completely redoing the data layer to follow the Content Provider pattern, or just expose only those tables via a Content Provider for the sake of the other application and still directly access the database in the primary application.
One of the issues I ran into with my prototype was that I have some fairly complex transactions, and the code I wrote to get that working is not designed particularly well and isn't reusable at all. As I add more functionality to this app, I'm going to need a better designed data access layer, before I set off writing my own, does anyone know of any good resources with design patterns for this type of thing already? Also, if I need to go the Content Provider route, am I going to have solid control over the database transactions?
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Sep 14, 2009
We want to store credentials for a user to a web service so the user doesn't have to repeatedly login, but we're concerned about security. We can't store a hash on the database, but we could probably use JCE encryption locally.
Is the content in SharedPreferences secured on the Android device?
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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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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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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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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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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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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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Jan 1, 2010
Which 3G wireless providers have the cheapest data plan?
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Jul 12, 2010
I want to create a new account type for gmail. Looking at the code it looks like to create a new account type, I need to add a new provider for gmail. Is it true? Can't I reuse existing providers to create a new account type?
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Jun 24, 2010
In this code I request location updates from GPS
locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER,20000, 1, gpsListener);
But how can I make sure it listens for Wifi or Cell ID updates too?
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