Android : How To Update A Database Used As A Source Of Data By App
Aug 4, 2010
I have an app which uses a large amount of data which has been compiled outside the app (on my main PC). The app is for my personal use so there are no complications with having to distribute data updates to other users. However, I am currently following a very convoluted and time-consuming procedure each time I want to update the data, and I wonder if anyone can suggest any ways to streamline it.
The procedure I follow whenever I want to add new data is as follows:
I enter the new data into a csv file which I maintain as the source of the relevant table in the database. I use SQLite Database Browser to import the data into an existing SQLite database. (This program does not seem to have the ability to append imported data into an existing table, so whenever a table needs updating I have to delete the existing table, then import data from the csv file into a new table, then manually edit the data types for all the fields in the table.)
I drag the icon for the database file onto the 'assets' folder of my project in Eclipse. I export the project from Eclipse as an apk file. I copy the apk file to my phone (using Astro File Manager) I uninstall the old version of the app and install the new apk.
when the app is run, code based on the example set out here copies the data from the 'assets' folder into the app's data folder; this means that each byte of data takes up two bytes in the phone's internal memory; at present this is not a problem, but could be as the volume of data grows; I wonder if there is a more memory-efficient method?
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Nov 15, 2010
I want to bind data from an xml file? how can I do that where i'm using a layout xml file to define a scrollview ??
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Sep 20, 2010
I am implementing an android application and i can't figure out how to solve this problem : When user clicks to the update button , i want to connect to the my server and check if there is any update on the data , if there is , i want to get data from server and update the database.Should i use xml structure to check and get updates from server or is there any smarter ways to achieve this ?
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Apr 6, 2014
I send data to my mysql database the posted data is empty...I don't know what is wrong with my code.
[HIGH]urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("POST");
urlConnection.setDoOutput(true);
urlConnection.setChunkedStreamingMode(0);
OutputStream out = new BufferedOutputStream(urlConnection.getOutputStream ());
[Code]...
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Sep 21, 2010
I would like to update my sql lite database with the native update-method of the SQLiteDatabase class of android.
CODE:.......
But i get following error:
CODE:....
I donīt know what should be the problem. Somehow the values do not arrive in the sql statement. I did nearly the same with the insert method and that worked quite fine.
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Aug 16, 2009
In MediaPlayer.create method an id to a Raw file can be used but how to use that in setDataSource method?
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Mar 21, 2009
I am having difficulty retrieving data from the internet to be displayed in a TextView. When I run the application it says the application has stopped unexpectedly.
I am using the code:
CODE:.................
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Aug 16, 2010
i want to ask about that can we convert the input source type data in android. my prob is here that i get the data from the url not in tags form. i fetch output in the inputsource type. after that i want to parse the data in meaningful form is this possible or not? if this possible then how can i implement?
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May 25, 2009
I'm experiencing some sort of problem. Let's say I have a MediaPlayer object wich can play an audio sound and a Resources object Code....
So when I invoke mp1.start() , sound1 plays, everything's normal.
But when I try to change the sound that my MediaPlayer should play, it doesn't work, here is what I do code...
I'm pretty sure someone can see a mistake in my code.
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Aug 29, 2010
I am adding items to my data source and would like it to appear in my ListView.
For some reason nothing is appearing:
Adapter:
CODE:.........
Adding items in onCreate:
CODE:...............
Here is my layout:
CODE:..................
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Sep 14, 2010
I am having a weird issue. I have an ArrayAdapter which I am sorting. This displays properly on my screen, however when I check the actual data source, the contents have not been sorted. How can I ensure that sorting my ListAdapter will also sort my data source?
CODE:....
This shows that my data source hasn't been updated, even though my ListAdapter presents my ListView in the correctly sorted order.
For example:
If my data source is [10,9,1,20] after sorting my ListView will show [1,9,10,20] but the data source will still be [10,9,1,20]
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Jul 22, 2010
I have a Windows web server already set up with a website (unlimited application pools) and I want to be able to access a database on that server via the Android app I'm developing. How can I do this? Can someone point me to a tutorial or give code example of how this cross-platform (Android/Java to ASP.NET/C#) communication can be done? (I'm trying to create a leader board or global scoreboard for my Android game on my server.)
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Jul 10, 2009
I created the following method for retrieving stored settings from the database:
public String getEntry(long rowIndex){
String value = "";
Cursor c = db.query(DATABASE_TABLE, new String[] {KEY_NAME, VALUE}, KEY_NAME + "=" + rowIndex, null, null, null, null);
int columnIndex = c.getColumnIndex(VALUE);
int rowsCount = c.getCount();
if(rowsCount > 0){
String value = c.getString(columnIndex);
}
return value;
}
On debugging I can see cursor c contains two columns and one row but when it comes to line
String value = c.getString(columnIndex);
it throws the CursorIndexOutOfBoundsException although columnIndex = 1 which should point to a valid entry. Does anyone know what could be wrong here?
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Feb 15, 2010
I am able to play mp3 files from a HTTP server.I have given the link as Datasource and it is working fine.When I
replaced the link with HTTPS then media player is not working.Please help to resolve this issue.
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Jun 17, 2009
I have a database in Excel and I want to import it into SQLlite so I can use its contents in spinners and other features of my application. I have done the tutorials and surfed online but no indications at all for my specific problem.
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Sep 23, 2009
I am experiencing a problem where when the android device wake up from sleep, the Activity would take forever to get redrawn(and have to terminate it most of the time). I am not sure why, but when I comment out the code below where it retrieves an object from the database based on id stored in the bundle, the problem goes away.
Not sure why the db transaction is causing an issue.
secondly, is it better to store the object in bundle instead of storing its id and retrieving it from db in onCreate?
CODE:...............
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Mar 6, 2009
I'm try to sent/receive data from my remote db server (MySQL) , I know I can't connect the MySQL directly on android . And I'm trying to use the soap , but I'm not sure if this is the right way?I don't have any experience on it , so my question is:" what is the way to sent/receive data from remote db server " in general ? Does it have any examples I can see ?
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Jun 8, 2010
If I have a bunch of data that is never going to change (eg. an English language dictionary or the rgb values of a couple hundred color names), how do I use an SQLite database to store it? I know a database is faster than loading everything into memory when the app starts, but how do I make the database either the first time the app runs or "before" the apps ever runs?
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Aug 14, 2010
I am an android application developer. I am developing an application which requires of me to use Sqlite database. I have implemented fetching the data, but i am facing problems when i try to insert data into the Sqlite database. The problem that i am having is that the new data i enter is not fetched, i.e nothing is new is being entered into the database.
this is the method i wrote in Data.java
myDataBase is an object of SQLiteDatabase
public void insertTitle(String Recipe)
ContentValues initialValues = new ContentValues();
initialValues.put(COLUMN_NAME,value);
myDataBase.insert(ZRECIPE, null, initialValues);
}
and i create an object "d" of it in Add.java, where i call the "insertTitle()" method. But nothing is inserted.
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Sep 17, 2010
I have the data in the android(Sqlite Database). How to transfer this database data to the System Database( like Access or SQL Server). After Transfer this data i have to use the data in the System.
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Jul 28, 2010
If possible, how can I get (and post) data from a mysql database using javascript? I know I can use php and other languages, but I just need to know if this is possible with javascript?
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Oct 8, 2010
I am currently looking in to developing an application for the android platform. I have some information that is stored within the SQLite Database of Android.
What I want to be able to do is to perform a query to the database table and populate a TableLayout with the information from the database table.
I have tried to find this on the Internet but have not had much luck. If anyone can help me to get about doing this would be great.
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Aug 19, 2010
I am working on some sample programs, where i have to take the value from the user and store it in the database. I have used DroidDraw to create the XML code for UI.For now, I have just started with a textbox. So, I have to take the value from this textbox and store it in a database. I am using SQlite browser to create tables. I read in some forums, that one way of doing this.
1. Copy the db file in the asset folder of the android project and use the AssetManager class. But i am not able to figure out how to use the asset manager class here. Or if I could get some simpler suggestions on how to store the value from user into the database, it would be great.
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May 9, 2010
I am trying to design a sqlite database that will store notes. Each of these notes will have common fields like title, due date, details, priority, and completed.
In addition though, I would like to add data for more specialized notes like price for shopping list items and author/publisher data for books.
I also want to have a few general purpose fields that users can fill with whatever text data they want. How can I design my database table in this case?
I could just have a field for each piece of data for every note, but that would waste a lot of fields and I'd like to have other options and suggestions.
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Jun 22, 2010
package one.two;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.database.Cursor;
import android.inputmethodservice.Keyboard.Row;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView; Code...
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Jun 22, 2010
public class List_View extends ListActivity {I would like to show stored data from database into a ListView. Code... Title and Date only.
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Aug 12, 2010
I'm doing an admin page that can view the users that exist in the system. My idea is to show a list of the users and the details in one page. I heard that using listview is very tedious. Is there any other way that is easy?
Maybe view in textview but I dont know how it works. I must put in a lot of textview on my xml? A simple task that I need to know how to do. I just need to know how to view data's in a page, using any method. Code...
As you can see I tried to put data from my database straight into the array but it can't work; final String[] TEST = c.getString(1);. The error message Type mismatch: cannot convert from String to String[] appeared.
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Dec 23, 2009
The database of my application need to be filled with a lot of data, so during onCreate(), it's not only some create table sql instructions, there is a lot of inserts. The solution I chose is to store all this instructions in a sql file located in res/raw and which
is loaded with Resources.openRawResource(id).
It works well but I face to encoding issue, I have some accentuated caharacters in the sql file which appears bad in my application. This
my code to do this : Code...
The solution I found to avoid this is to load the sql instructions from a huge static final string instead of a file, and all accentuated characters appears well.
But Isn't there a more elegant way to load sql instructions than a big static final String attribute with all sql instructions?
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Nov 24, 2010
We have an android app that currently sends data to a php script which writes to a mysql DB on the same server. We are thinking of using a scalable remote DB e.g. amazon RDS.The question is how does our android app write to these remote DBs? Do they have some kind of rest API, or do we have to send the data to the same php script on our server but use that to post to the remote mysql DB?
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Aug 3, 2010
CODE:................
Where would i declare my {KEY_ARRIVAL} as i already have my KEY_ARRIVAL declared in my DBAdapter.java. But there is an error stating KEY_ARRIVAL cannot be resolved?
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