Android :: SQLite Query And Using Cursor To Deal With Multiple Rows

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?

Android :: SQLite Query and using cursor to deal with multiple rows


Android :: SQLite Query - Select Query With Between Clause

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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Android :: Finalizing Cursor Android.database.sqlite.SQLite­Cursor

May 6, 2009

I am seeing the exception in 'adb logcat'.But I don't know if it is caused by my application or android platform.Can you please give me any idea how to troubleshoot this exception?

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Android :: Hiding Specific Rows Of Cursor

Apr 23, 2010

I have a cursor, and it got, lets say, 40 rows, I want to hide some rows when the user check a checkbox.One way is run the query again on the cursor, but it doesn't help me because the condition is done by Java (calculate balance, with many logic).I need something that will get the current row, and return if it can be show or not.any help will be appreciated.

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Android :: Filter Rows From Cursor - Don't Show Up In ListView

Jun 12, 2010

I have a Cursor that returns rows I use with a SimpleCursorAdapter to populate a ListView. I would like to filter some of the rows so they don't get displayed in my ListView. I use the data from the rows elsewhere in my Activity so I don't want to change my SQL to filter them with a WHERE clause. What is the best way to keep a row from being displaying in my ListView? Ideally I would check a column in my row and then only add rows to the ListView that satisfy a condition.

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Android :: Inserting Rows In SQLite Database

Nov 19, 2010

I am trying to insert rows into my database, but nothing gets persisted. Here is my helper class:

package com.android.cancertrials;
import java.util.Calendar;
import java.util.GregorianCalendar;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;..................

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Android :: Deleting SQLite Rows Automatically / Periodically

Mar 29, 2010

i have a application that displays tasks and i created an option in the Settings menu that lets you choose in how many days all (Never, 10 days, 20 days or 30 days) these tasks should be automatically deleted. So when i open up the app there will be a method that will be called and check if theres any tasks to be deleted. I did that to challenge myself, but i'm hitting the wall with my head and i cant come up with something. So here i am in need of help! A little more information: i was trying to do something with java/android code, but from past searches i saw people dealing with it using SQL functions. Is it better?

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Android :: No Result On Sqlite Query

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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Android :: SQLite Query In Application

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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Android :: Query SQLite Database

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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Android :: SQLite - How To Use String Having In Query

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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Android :: How To Write Query For SQLite For App

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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Android : Deal With Multiple Screensizes + Dynamic Controls In Droid?

Apr 23, 2010

I am learning how to program on Android phone. However I am unsure how to make my application work for the different screen sizes and resolutions.

I read the tutorial on the android site and still unsure how to do it.

First I know there are different files so could make a layout for each of the sizes but my problem is most of the screen needs to be dynamically created so there would not be much to put in these files.

So I am not sure how to android to re size dynamic controls based on the screen size.

I have also read it is bad practice to make controls in anything but the xml file as it separates view logic and programming logic. However they never talk about if you need to make these controls dynamically what you should do.

So is there some other way to do it that is considered good practice?

Edit

I get this error when I try to run the switcher application.

[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: Error type 2
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: Error: Unable to connect to activity manager; is the system running?
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: usage: am [start|broadcast|instrument|profile]
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: am start [-D] INTENT
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: am broadcast INTENT
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: am instrument [-r] [-e <ARG_NAME> <ARG_VALUE>] [-p <PROF_FILE>]
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: [-w] <COMPONENT>
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: am profile <PROCESS> [start <PROF_FILE>|stop]
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: INTENT is described with:
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: [-a <ACTION>] [-d <DATA_URI>] [-t <MIME_TYPE>]
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: [-c <CATEGORY> [-c <CATEGORY>] ...]
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: [-e|--es <EXTRA_KEY> <EXTRA_STRING_VALUE> ...]
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: [--ez <EXTRA_KEY> <EXTRA_BOOLEAN_VALUE> ...]
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: [-e|--ei <EXTRA_KEY> <EXTRA_INT_VALUE> ...]
[2010-04-27 12:06:41 - ViewSwitcherTest] ActivityManager: [-n <COMPONENT>] [-f <FLAGS>] [<URI>]

To your question: It's dynamic because
the buttons in my example grow and
shrink depending on one of the 3
possibles sizes, because they use
scaled pixel (You probably know that
you don't have to deal with screen
sizes itself). So a scaled pixel
compared to a real a pixel has a size
of 0.75px, 1.0px or 1.5px. Android
automatically and dynamically adjusts
it to the actual size. So you don't
have to care about this in your code.

So if I use scaled pixels then I don't have to worry about different screen sizes?

At the moment I don't know an example
except in games where you have to deal
with "real" pixel. But if you want use
it, multiply it with the value of the
current density. This is your "ratio".
I don't have the example with the ball
anymore but I have another which uses
the same technics. You can run it on
different screen sizes and you will
see that the buttons will always fit
into the layout. You could use the
same technics for your intents. In
this example you can scroll with the
"Scrn" buttons from one view to
another of 4 views. (At the moment
they all have a black background so
you don't see that they are different
views). The "Enter" button exits the
test. It's an Eclipse project. You can
download

So if I want to deal with ratio then I use real pixels and not scaled pixels? What advantage does this give me?

will scaled pixels work with changing from portrait to landscape( ie will it fill up the new found space)?

Finally should I make the controls now through code or is there another way? As I said I am getting data from a webservice that must look like this

checkbox label label

It can be one record or 10,000 records I don't know so these have to be appended to something that is like a window panel( the controls in there get a scroll bar).

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Android :: Using LIMIT Statement In SQLite Query

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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Android :: Can Query Inside SQLite Transaction

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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Android :: Sqlite Query With Regular Expression

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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Android :: SQLite Query Throwing Exception

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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Android :: SQLite - Query - Use Other Field Instead Of RowId - KEY DATE

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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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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Android :: Query To Get Records Based On Radius In SQLite

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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Android :: SQLite Problem - Program Crash When Try Query

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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Android :: SQLite Query In Application Giving Error

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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How To Delete Query From SQLite

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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Android :: Prematurely Stop A Long-running SQLite Query

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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Android :: How Cancel/interrupt/break Pending SQLite Query

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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Android :: SQLite And Cursor Leak On AutoComplete

Oct 20, 2010

In my activity, I have an AutoCompleteTextView that gets its contents from my custom adapter. I created my adapter by following this example.The adapter works so far, but I am getting so many errors on leaks and cursors that are not finalized.My question is: how do I close the db in runQueryOnBackgroundThread?

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Android :: Populate A Spinner From Cursor Accessing An SQLite Database?

Aug 25, 2009

How do you populate a spinner from a cursor accessing an SQLite database?

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Android : Working With SQLite Database / Getting Cursor Out Of Bounds Exception

Jun 30, 2009

I am having some trouble working with the SQLite database. I am able to create the database, add to it, and delete from it with no problem by following the Notepad examples, but I am trying to avoid duplicates and therefore want to check to see if an entry exists already.

Below is the code I have for testing to see if a game exists. I get the correct Log message of "No Games" when there are no games, as well as the correct value for column from getColumnIndex which is proven to me by the log printout telling me that column = 1.

The error message that I receive if I don't catch the exception says "Caused by android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 1

Where is Index -1 being requested if my call to getColumnIndex is returning 1? Code...

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Sqlite Query - Record Is Being Returned If Table Is Empty?

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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Android :: Listview / Arrayadapter With Rows Containing Multiple Text Views?

May 27, 2009

I want to create a listview with rows that have an image and two textviews. This must be a very common activity but I can't find a class/or source code that does this.

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