Android :: Storing Double Values In SQLite / How To Ensure Precision?
Jun 21, 2010
i have a problem with double values i need to store in an android homed sqlite database. since these double values represent gps values (lat & lng), i really NEED an absolute precision down to the 9th number after the comma.when reading lng from this table into some (java) double variable, i get a value like "0.999956837" - this renders the values pretty useless to me.is there a way to enforce the precision i need other than storing the values as "text" fields (what would make expensive casts neccessary) or storing them as integers (meaning i need to multiply/divide at each write/read-op)?
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Oct 14, 2010
I develop app and I need to store and read ( read every 60 seconds, store rare ) data. What is the most easy way to achieve this?
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Jan 11, 2010
I want to have some static numeric and text values as an application resource. For example my data is like this:
Levels 5 First_Level 500 60 1 Second_Level 500 80 1 Third_Level 200 60 1 Fourth_Level 130 30 2 Final_Level 100 30 3... and another 300 lines...
The format and order of the data is predefined and guaranteed to be valid.
I could read it with java.util.Scanner, but it's extremely slow in Android, reading a 10 KB file takes minutes. It's slow because of the regular-expression-based pattern matching inside (when I traceview'ed it).
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Dec 17, 2009
i have the critical situation.i want to store the image in DB in android. but i don't know how to store image in db and how to get from db.i novice to android platform.so anyone give me the samplecode to develop my application.i tried more time but not i get the correct output.how to create the image field in SQLite db and how to insert the image within db.
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Mar 22, 2010
i am developing an application which uses sqlite db for storing records. I am developing this application on SDK 1.5.. when i test the application on 1.5 device it works good but when i try to run it on a 1.6 device i get a force close message with following logcat output:
03-19 09:31:35.206: ERROR/AndroidRuntime(224): Uncaught handler: thread main exiting due to uncaught exception..........................
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Feb 27, 2009
I am currently trying to store an image into the sqlite database as a blob and retrieve it back.I am not sure if this is the correct approach since i dint find much of sample codes related to inserting images in sqlite. I am able to insert values but when i try retrieving them as byte using decodeByteArray it gives me the following error. DEBUG/skia(13003): xxxxxxxxxxx jpeg error 53 Not a JPEG file: starts with 0x%02x 0x%02x.The image retrieving query works fine as i have checked retrieving an image previously stored as blob in a sample database.I have tried storing and retrieving different image files but i am getting the same error.Could any one tell me as how to solve this problem
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Aug 10, 2009
I need some help to store a Object in an SQLite database using Android.I don't know whether it is possible or not.If it is possible means please give some code snippets to create a table which can store an object.
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Sep 16, 2010
I want to store this array in to SQLite database.Can some one give me code for converting this array in to byte[] or give me code for another solution ?
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Sep 22, 2010
I am parsing the website to store the contents in a URL, in that some images are there, i want to store the images in database which are parsed from the site. i m really struggling on this, can any one help me regarding on this?
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Nov 4, 2009
I want store an image using a SQLite database in Android (using an insert statement).Also I need to retrieve the image from the SQLite database and display it on the screen.
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Aug 11, 2010
I am using simple xml framework from http://simple.sourceforge.net/. How can i format the date or double values? I see a function called transform but how do I apply it all double and date fields in my class?
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Jul 5, 2010
I wanna set a textview as the values from SQLite when I click the ListView Here is my way...
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Apr 2, 2010
I am currently in the process of creating an application that records current location of a mobile device in intervals, displaying the route as a coloured line on the device in real-time. At the same time the application is storing the longitude and latitude in a SQLite database as I want the user to be able to bring up that specific route again.The route has a primary key and each waypoint is linked to that route by a foreign key. What would be the easiest way to display the saved route on the map?
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Aug 13, 2010
I'm trying to insert values on Android SQLite Database. The question is, Iḿ trying to insert a word, the table has 3 columns, ID, WORD, COUNT. When I insert a word in the database, some method will verify if this word exists on the database. If yes, it will increment the value of COUNT for this word.
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Jul 2, 2010
I am developing an application for android phone, In this I need to use at least 400 audio file which can
be played for some respective texts,Now my question is which is the optimized way to do this.One solution is putting all the audio files in the resource folder and referring from there, this will never be a feasible solution as the application size will increase. Is there any way to convert the audio file into some format and dump into the SQLite database and retrievr flexibly.
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Sep 25, 2010
I have a table called "images":
CODE:.........
On inserting a row, I'd like the URL column to be unique. At the same time, I'd like to find out the id of the row with that URL.
INSERT OR IGNORE images (url, caption) VALUES ("http://stackoverflow.com", "A logo"); SELECT last_insert_rowid(); -- returns the id iff there was an insert.
Of course, I'd like to do it as quickly as possible, though my first thought was along the the lines of the following pseudo code:
CODE:...........
But this seems hopelessly inefficient.
What is the most performant way of getting the Auto incremented row id from an INSERT OR IGNORE statement.
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Apr 15, 2010
I am working on developing an application which requires high precision time synchronization between handsets. I'm looking for under 100 microseconds of skew between phones. I wondered if anyone had tried this before. In theory the GPS receivers could be used to pretty accurately synchronize timing, but I'm not sure if Android is setup to use them that way. My first cut plan is to port a PTP (precision time protocol aka IEEE-1588) client to Android.
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Apr 9, 2014
I want to ask where does the defaults values of memory min-free values of a Rom reside? I mean what file I would have to edit to edit those values?
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May 11, 2010
I am creating an app that uses GPS coordinates. Can anyone help me with the following?
1) I want to ensure I am using a current 'fixed' location and not a previously stored one, so I am trying to avoid using getLastKnownLocation, but cannot seem to figure out the alternate to this?
2) What is the best way to display a "please wait" message or something along those lines while the GPS service is attempting to get a fix (and ideally periodically allow the user to cancel out)?
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Sep 17, 2010
If I have my app fetching content from my server, what mechanism should I use on my server to ensure that its my app making the request? Is there any way that I can sign the request to using my app's signature to show its come from my app and not from a stolen version or copycat?
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Nov 23, 2010
Is there a truefire way to make sure my app will display the same on my Motorola Droid 2 as it will on other Androids? I use nothing more than basic Linear Layouts, Image Views, Buttons etc - is there a good checklist to go by before I even think about launching an app?
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Jan 1, 2010
Is there a way that I can make sure a given item in an android listview is entirely visible I'd like to be able to programmatically scroll to a specific item, like when I press a button for example.
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Jun 25, 2010
I have a service that will monitor location changes daily. What I know so far that to start a service at boot, I have to follow the linked tutorial. This way I can get the service started at boot, but to save battery I need it only between 9am-9pm.
Question is pretty simple, so I will repeat:
How can I ensure a service is started at 9am and stopped 9pm every day?
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Oct 5, 2010
My application opens in Activity A1. None of the views in A1 are focused at startup, until I use the arrow keys to navigate through the views. A button press in A1 launches activity A2. When A2 opens, the first Button in A2 is focused by default. I do not want this happen. What I want is when A2 opens, none of the buttons are focused until arrow keys are used to naviagte through them(just like it is in A1).
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Nov 20, 2009
I am having trouble in finding out the right settings for my emulator to simulate the Motorola Droid. Does anyone know with what settings should I create my emulator, so that I can emulate the Droid handset?
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Apr 20, 2010
Building an iPhone OS application that will allow users to anonymously post information to a web application (in my particular case it will be a Rails based site) ... and I want to ensure that I only accept posts that originate from a specific application running on an iPhone/iTouch. How is this best accomplished? (btw, if your answer applies to Android please feel free to post it here as well as I'm curious to know if the techniques are the same or vary).
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Oct 28, 2010
Is there a way to ensure that my Android UI will display as expected across different phones ?
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Oct 2, 2009
I open an Activity which has a number of elements... some TextViews, some Buttons, and an EditText. For some reason, when the activity starts, the EditText is focused by default, which causes the keypad to appear hiding the screen. I only want this EditText to be in focus if the user clicks into it. How can I ensure that this View isn't in focus when the activity starts? I've tried calling requestFocus() on one of the buttons, but it hasn't changed anything. Ideally, I don't want anything in focus at all.
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Aug 22, 2009
i am using android.opengl.GLSurfaceView in my game, which is working well expect under one condition: Starting the game a second time after leaving it by pushing the home button, causes the game to flicker, because the rendering thread from the previous instance is still running and firing OpenGL commands. Now the question is, how can i ensure that only one instance of GLSurfaceView/GLSurfaceView.Renderer gets created?
To solve/workaround the problem i've tried to set the following properties in the manifest file to to ensure the activity gets shut down if it gets inactive.
android:configChanges="keyboardHidden|orientation"
android:launchMode="singleTask"
android:multiprocess="false"
android:noHistory="true">
But without success, the activity/rendering thread still keeps running. Do you know of any certain way to exit the rendering thread/free GLSurfaceView?
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Mar 2, 2010
How do I ensure that I get the 'resize' behavior when the IME is shown/hidden?
I've included the following in my manifest:
android:windowSoftInputMode="adjustResize"
What else am I supposed to add? I've read that the container that the View is placed in should 'support resize' but what layouts support this?
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