Android :: Choosing Between Requery Or Firing The Query Again In SQLite
Jun 19, 2010
Have been using a SQLite database, Theres a situation where i have a list which displays all the "name" field data of a table "table1". Now i have a button to insert data in "table1". The list is populated using a simple cursor adapter which is passed a cursor "cursor1" populated with the data. "cursor1" is prepared using the SQLite query - "SELECT * FROM table1". Now the moment i insert data, i need to update the list too.
My question is- will the Adapter sense the database change automatically (i guess not)?
using cursor1.requery() is correct or should i use cursor1 = db.query("table1", null, null, null, null, null, null);
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Sep 29, 2010
I want to run this query in Android Application :
code:.......
My DB schema
code:..........
Here is the function -
code:...........
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Sep 24, 2010
I create a table like that
CODE:...........
I update it this way
CODE:..........
I do see the change in eclipse with DDMS questoid
But when i try to retrieve the value I get nothing ....
CODE:.........
I've tried some variant like
CODE:............
With no success
Is this problem come from the type (integer) of my column ?
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Aug 7, 2009
I use this query in my android database, but It return no data. Am I missing something?
CODE:................
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Jun 2, 2010
I successfully created the Database and inserted a row however I cannot Query it for some reason. My Droid crashes everytime.
CODE:...........
I get this exception
No such column: value: , while compiling: SELECT DISTINCT value FROM mainTable
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Jul 17, 2010
I have a query that pulls everything from a database into a list view.
code:..........
I want only the records where the field KEY_HOMEID matches a variable called journalId which should be a numeric string.
I would also like to know how to bring the variable into my DatabaseAdapter... would ((resource)this.getApplication()).getjournalId()) work? resource is a class that extends application.
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Oct 10, 2010
I am trying to write a select query from one single table in SQLite DB in my app where data exists.
This is the SQL.table has these columns - id(INTEGER), start_time(INTEGER), category(TEXT)
select category from tuuserid_pref where id = (select max(id) from tuuserid_pref
where start_time < '1242'); by the way I want to bind the value shown in 1242 which I have in an Integer variable.
I have written selects and inserts and updates without binding parameters and they work using db.execSQL and db.rawQuery functions but just cannot figure the binding parameters out.
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Mar 23, 2010
I have a query that selects rows in a ListView without having a limit. But now that i have implemented a SharedPreferences that the user can select how much rows will be displayed in the ListView, my SQLite query doesnt work. Im passing the argument this way:
CODE:...................
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May 15, 2010
I'm using the SQLite3 database system in the Android library. I need to execute a query during a transaction to see if there is a similar entry already there. If there is, I have to perform some other logic and adjustments before I add a new row. Can I execute a query within a transaction and get the result back immediately?
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Feb 16, 2009
Is there any way out to achieve "SELECT * FROM tblname WHERE name LIKE '%[0-9]%' ". i know we can't do this with sqlite~ but how to deal with such query task with sqlite? i tried to use REGEXP ~but unluckily it is not pre-defined~ so i tried to define it by myself...but even i couldn't find a way in android to create a UserDefinedFunction...
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Jul 29, 2010
Im trying to get an object form my SQLite database in my Android application. I know that the contact is in the database because when I add it and try finding by ID, it returns the object. When I try finding by first and last name, though, it throws an exception and Im left with a null reference.
Here is the query:
CODE:..........
Ive also tried to find just by first name and just by last name. Same result as above.
The exception is an SQLite exception
no such column: aurelius: , while compiling: SELECT _id, last_name, first_name,
email_address, organization_name, label, label_position FROM contacts WHERE
first_name=marcus AND last_name=aurelius
And also happens when trying to select just first or last name
no such column: marcus: , while compiling: SELECT _id, last_name, first_name,
email_address, organization_name, label, label_position FROM contacts WHERE
first_name=marcus
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May 13, 2009
I know db.query was written like below in Android sample. I want to use other field instead of rowId witch is KEY_DATE, but it's not worked as well.
CODE:.................
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Jun 27, 2010
I have this query which does work fine in MySQL
CODE:............
Distance is in Kilometers, the input is lat=12.345 and lon=67.89
The SQLite is 3, and I can't run custom functions with it as it's on Android. I also don't have acos() etc... as that is not part of the standard SQLite.
How would be the above query in SQLite?
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May 18, 2010
I have a problem programming with android SDK 1.6. I'm doing the same things of the "notepad exaple" but the programm crash when i try some query. If i try to do a query directly in to the DatabaseHelper create() metod it goes, but out of this function it doesn't.
This is the source:
CODE:.................
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Sep 30, 2010
Am I going wrong anywhere here ? because this is giving runtime error. application stopped unexpectedly.
I may b wrong in syntax.
CODE:..................
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Nov 29, 2012
i want to run a delete query with limitation . I've tried to many queries but they didn't work . For know , I just want to remove all the rows and I write this code "
DELETE FROM tbl1 where _id IN(select _id from tbl1 WHERE cat=21)
The emulator runs perfectly without any error . right now , I have 32 rows with cat = 21 . solve this problem ?
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Sep 26, 2009
How to programmatically stop a long-running query?
The long-running step is, for example, the first call to Cursor.moveToFirst(). This can sometimes take up to 30 seconds so I would like the user to be able to cancel.
However, how should this be done? I've tried closing the Cursor (in another thread) but all that happens is that the close() call takes as long as moveToFirst() and then terminates with the exception:
java.lang.IllegalStateException: attempt to acquire a reference on a close SQLiteClosable
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Jun 24, 2010
I've got a query, (I'm using rawQuery())
SELECT * FROM <table>
I'm then storing what it returns using a cursor. From their what I want to do is, start at the first row so.. cursor.moveToFirst() then take each column , column by column and store its particular value in a variable. I then want to move onto the next row and do the same. So I guess my question is How would I get cursor to deal with multiple columns?
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Aug 11, 2010
In my Android application user can fill database with imported data, then perform predefined, complex SQL query. With some data pattern, query will take very long (minutes and more on HTC Hero), while common usage will not exceed 10-15 seconds.
Is there any way to cancel pending SQLite query on Android? Timeout would be as good as well, partial results are not required. I'm performing query within AsyncTask.doInBackground()
I know best way is optimize query or change app logic, but in this case results depends on user knowledge anyway, so I'd like to help those who enter troublesome pattern.
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Mar 21, 2012
I've a problem with a query in sqlite3.
The query is very simple:
SELECT MAX (INIT_DATE) INIT_DATE FROM TABLE;
When my application execute this query, and the table is empty, a record is returned. I can't understand why a record is being returned if the table is empty. It should return cero results.
I've tried to execute the query in two different ways:
cursor = db.query(true, "TABLE", new String[] {"MAX(INIT_DATE) AS INIT_DATE"}, null, null, null, null, null, null);
cursor = db.rawQuery("SELECT MAX(INIT_DATE) AS INIT_DATE FROM TABLE", null);
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Aug 19, 2010
can we use truncate query in android database? otherwise can we performing truncate operation using our java code?
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Jul 25, 2010
I have an Android SQLite/ContentProvider problem that I have been beating my head against the wall for over the past 3 hours.
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Aug 11, 2010
I am making a very simple dump and display app. I would like to see my newly entered data displayed on the list found on the first tab. But I don't know where to place requery();
Here is the code for the first tab. (Displays the data from DB.)
CODE:.........
I have tried doing (pseudo codes only)
CODE:........
And
CODE:............
But BOTH don't work!
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Mar 16, 2012
I would like to have a running counter (e.g. from 10 Minutes down to 0) in an List item. I have a cursor adapter and in a spezific field the time How long the counter should run.
I tried it with a background service which calls every minute a requery to the cursor to refresh the counter in the list item.But now I have a conflict with other parts in the list which are also depends on cursor requeries.best practice for a running counter in an cursor adapter without calling requery?
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Apr 22, 2009
I know that in a content provider "query" method one can indicate to the cursor a "notify uri". The cursor knows what this uri is. Does the cursor uses this uri to update itself? Does it result in a call to "query" method of the contentprovider for a query. How does the cursor know what the additional where clause arguments are?
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Nov 18, 2010
Some of you may recognize me from having decided on going with the EVO. Well, it turns out my girlfriend gets a better deal on handsets with Verizon's network. She can get Droid 2 Global, Droid Incredible, or Droid X for free with $25 "all you can eat" lines. They are a bit more pricey per month than sprint ($5), but with free phones that seems like the network to go for. Her line doesn't require a contract either (although mine will).She is pretty much decided on the Incredible I believe. She likes the size (moving from iPhone 4s), likes the fact that there is no slide-out keyboard, and likes the nice quality of the screen.I am torn between an incredible and the Droid X. The big selling feature of the Incredible right now (since most specs are really similar) is the fact that Best Buy will have them for $1 at the black Friday sale. The other two phones will each run me $150-$200 out the door.
I guess I just wanted some incite on what you all think would be the better/best choice. The worst thing about the incredible for me is the tiny battery in it, although I know we can go aftermarket. My nunderstanding is that a 1600 mha battery wouldn't increase the bulk, but add a little weight, which is fine. Also, the incredible doesn;t ship with an SD card (I don't think?), though it comes with 8GB on board, so I could get an 8-16 gb card for our music for far less than the difference (of $150-$200) for the other droids.
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Mar 31, 2014
When i click button "Add profile picture" it goes onto gallery as it should but once i click a picrture it collapse and the app closes, why is this? I have an image view that is what is goes on?
Quote:
package com.example.timetable;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;[code]....
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Nov 2, 2013
Trying to figure out how to get a working Android tablet to play in my car's USB port. Apparently the SGS3 Easy UMS app works, where you are able to play music through the car using that app, as it has a sim card slot to fix the issue where usually the car will say device not supported, as is my issue with the Nexus 4.
I was trying to get a Nexus 7 tablet installed in my car, without redoing all the stereos etc. to get USB sound, but it seems that may be the only way to go. I really want a USB connection, and not Bluetooth / Aux, as the sound quality is inferior...
Car: Chevy Cruze 2012 Tablet of choice: Nexus 7, but may go with a Galaxy Tab, if I'd be able to use USB that way.
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Nov 15, 2010
I have a list in my app.
When a user touches a list item with their finger, the onListItemClick handler fires and I have it opening a new Activity.
However, when a user uses the trackball/pad to click, I want to perform some different functionality. I've overrode onTrackballEvent and everything works perfectly fine in the emulator's trackball mode.
Unfortunately, when testing on the Samsung Moment, clicking the trackpad fires the onListItemClick handler, not the onTrackballEvent handler.
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Feb 27, 2010
Any experts on AlarmManager out there?I've got something weird going on.The basic code to set my repeating alarm works fine. I can close my app and the alarm will continue to run like clockwork every five minutes. It works fine only if I set it in the app and then close the app.I've got a registered BootReceiver for re-registering the repeating alarm. I know it fires on boot b/c the log message clearly shows it is firing and re-setting the repeating alarm in question for the same frequency. But the AlarmManager is not firing.Basically, the nearly identical code for setRepeating() fires when set from the app and continues to run when the app is closed, so I know my AlarmReceiver is functioning, but the AlarmManager is either not broadcasting this alarm or my receiver doesn't work from an alarm set in the boot receiver.
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