I have created a database for my android app which contains static data and does not require update/delete functionality thus when the app starts, I want to check if the db exists and if not then execute my dbAdapter class. I know its a simple if statement but I was just wondering the most efficient way to query whether the db exists.
View 2 Replies
I want to run this query in Android Application :
code:.......
My DB schema
code:..........
Here is the function -
code:...........
I would like to check whether there is any direct API available to check whether a particular Database exists or not ?
Currently, to initialize data for the first time (not repeatedly), we try of open the db and if it fails we know the database does not exists otherwise it is already created and initialized.
Is there any simple API available to check whether DB exists or not ?
I couldn't find Calendar application in the emulator, is there any plug-in to have all the applications enabled in emulator?
If Calendar app exists, what is the service API for Calendar application supported by android.
I'm trying to open a file in android like this:
CODE:..........
But in case the file does not exists a file not found exception is thrown . I'd like to know how could I test if the file exists before attempting to open it.
How can I test if there's a ContentProvider for a Uri ?
I'm currently doing a query on it and checking for a null cursor, but that generates an error in the system log each time, which I don't like to do.
I used AlarmManager to set the pending intent.
I need to find out the state of the pending intent, in other word, is this pending intent working or not. Boz i may need to cancel this pending intent, but before canceling it i want to make sure it's active.
But i see no function in AlarmManager can read this status.
I am struggling to find a way to determine if a valid network is available to an app. specifically, if there's a problem making a network connection, i would like to be determine if it's on the client (app) side, or a problem with the remote server. i happen to be attempting a URL connection (using http client) and the wide and varied possible exceptions don't seem like a reliable method. for example, when the network is down on the phone, i received "unknown host exception", which doesn't really indicate the root cause ... it's possible to get that exception with a valid network connection also. at other times i get other exceptions, such as socket exception. is there a way to ask the phone if it's network ready? the other option i thought was to ping a known good server to see if it responds ... with an IP address. kind of a heavy weight option and not foolproof.
View 2 Replies View RelatedNeed some information on Gestures. How does android treat Operations like Fling which are at device level? Are they treated as Gestures? I am not able to see any gesture listner code in Launcher (Home screen ) application. If i want to change ( add/remove/modify ) the behaviour of Fling operations where i should start looking in the android code base?
View 2 Replies View RelatedI am a big fan of Head First Series. so is there any Head First Android Book exists?
View 4 Replies View RelatedI am looking to the fastest and the correct way to check if a record exists in the database:
CODE:...................
I have already created this project, but I wanted to start over. deleted the HelloAndroid folder from my workspace folder restarted Eclipse now I can't create a project with the same name, because Finish is greyed out, and it gives me the following message: A project with that name already exists in the workspace eclipse
How can I completely delete my old HellowAndroid project from Eclipse?
Is there a way to check and see if an Activity exists on your device? If I have a youtube video link I want to specify it open in the YouTube PlayerActivity. However, I don't want to crash if for some reason they don't have it.
Is there a way to check and see if the activity exists? I don't think I can catch the runtime exception since startActivity() doesn't throw it.
I have a Tabview with 3 tabs (each having their own activity). I have a tab that parses a RSS feed. How can I refresh this feed via a menu button? I tried doing the following but I lose the tabs above of course.
CODE:.................
I have a database of notes and lists, with three association tables.
Basically, lists are parents of notes and other lists, and notes can be parents of other notes in a outline like hierarchy.
I am using this query to return all notes within a list as well as the number of subnotes each note has.
CODE:...................
This query works just fine, but it's overkill. I don't need to return count(n2.note_id) as Num_Subnotes because I'm only using that value to check if the note has ANY SUBNOTES AT ALL. Essentially it's a boolean value where 0 is false and > 0 is true.
It seems to me that counting all those records is a waste of time when I could just return 1 after finding the first matching value.
Is there a more efficient way to check if count(n2.note_id)>0 in the above query?
I am using a ContentProvider for caching results from a web-service query. It is an HTTP request and the response content is XML. Most of the data is cached, so I simply query the DB, if not found, request from webservice, insert in DB and requery the DB. Thus the response is always a Cursor from SQLiteDatabaseHelper.
I have one result set that is not stored in the DB and since it is 100% transient, but I would like to provide the appearance of it coming from the DB's Cursor. Is there an easy way to do this? For example, if I could project it onto the cursor with a cursor.setValue("string", objectValue) or some other existing implementation.
If not, I will either bypass the DB for this content result, or stuff it into a trivial table that is constantly reused.
I want an widget that one can sign on it on the touch screen its ambivalent to painter so is there a way using the painter in my application?
i want it too fit the 2.1 version does it exist ?
There is a game called blowfish for iPhone that is pretty cool for passing the time by. Any idea if something similar exists for Android?
View 1 Replies View RelatedIs there a way to unzip and see what files exists in classes.dex file. Are there winzip like utilities for .dex viewers.
View 2 Replies View RelatedIs there a way to observe a bluetooth pairing and then be aware of when the connection no longer exists? Basically I want to observe when my phone connects to another device and what that connection is dropped to that I may execute an action based on that connection.
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
Saving the file code...
The last line gives a null pointer exception, why is BitmapFactory.decodeFile returning null? I can verify that the file is getting saved correctly as I can pull it using adb and see the png displaying properly.
Does this exist for the hero? I read it works for other htc phones and blackberry but do we have something similar?
View 10 Replies View RelatedUsing ClockworkMod Recovery v2.5.0.1
I was able to install CyanogenMod-5.0.8 but now it is stuck on the animation screen. When I boot using ClockworkMod it Shows this message:
E:Can't mount /dev/block/mmcblk0p2
(File exists)
E:Can't mount CACHE:recovery/command
I tried to undo the rooting with the PB31IMG.zip but it will not let me load it.
I have yet to see this problem mentioned in this forum and it's very specific problem which is hard to describe but I will do my best.
Problem: Opening messages app takes me to my last conversation and auto-opens the softkeyboard.
I've found only one work-around for this. It goes as follows
Workaround: Start the Hero up and wait until you have at least 2 text messages. Open the notifications window and click the "new messages" notification. This will open up the messages app showing all conversations then click Home. Once doing this, no matter what you do, clicking the messages app will always take you to all conversations rather than the last conversation you had open.
If I access the first new text message, upon starting the phone, in any other manner than stated above I get the problem where after viewing a specific conversation and clicking Home, I open the messages app and it goes back to that specific conversation.
See title for explanation.
Here is the method I'm using:
CODE:.........
And here is the call to the method:
CODE:...........
Why it would be throwing the "No Column Found with name=Test", although my DB explorer shows there is indeed a column named name and a value in a row named Test?
I am creating an application that checks the installation of a package and exits after launching the market-place with its id.
When I try to launch market place with id of an application say com.mybrowser.android by throwing an intent android.intent.action.VIEW with url: market://details?id=com.mybrowser.android, the market place application does launches but crashes after launch.
The application com.mybrowser.android doesn't exist on the market- place.
MyApplication is my application.
CODE:....................
However, when I try to launch the market place for a package that exists in the market place say com.opera.mini.android, everything works. Here is the log of this case:
CODE:.....................
I see all the two piece rubber cases, I'm wondering if anyone knows of a one piece case that exists for the Droid (like those you put on a Blackberry). I never use the slide out keyboard and would just assume cover it so it stops accidentally sliding open.
View 2 Replies View RelatedFirst, I still can't forward emails properly. If it makes any difference this is an exchange email. All forwarded emails are still sent as an Eml attachment, and still get a bunch of jibberish texts.
Second, Bluetooth is still not working properly in my car. Don't know what compatibility issue is there.
And just to throw it in there, I'm posting from my handset and on screen keyboard, it is typing very very slow, better with the slide out but damn...
I have a friend call David with phone number 11223344. I cannot see his phone from contact list. But when i dial his number, I can see his name when i type 1122. But when David calls me, as it is not in contact list, the phone only display 11223344 as incoming call, rather than his name. My phone is LG P990.
View 2 Replies View RelatedI am using sqlite database in andriod. i m not creating any database i m using created database and it has successfully opened but when i am using:
Cursor cursor= db.query(tablename, null, null, null, null, null, null);
Then it gives this table does not exists plz help me.i got frustated with this problem. i also googled this problem but didnt find exact solution.