Android :: Creating Database In SQLite

May 23, 2009

I am new to android and I have a problem in creating a database.

public class database extends ListActivity {
/** Called when the activity is first created. */
private final String MY_DATABASE_NAME = "myCoolUserDB.db";
private final String MY_DATABASE_TABLE = "t_Users";
Context c;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ArrayList<String> results = new ArrayList<String>();
setContentView(R.layout.main);
SQLiteDatabase mydb=null;
try
{
mydb.openOrCreateDatabase(MY_DATABASE_NAME, null);

} catch(Exception e){}
}}

When I run this code it throws a run time exception.

Android :: creating database in SQLite


Android :: Creating SQLite Database In Phone

Jun 14, 2010

I want to create a SQLite database in my app, which contains three tables, I will add data into tables and will use them later on.but I like to keep database ,as if when app is first time installed it checks whether the database exist or not, if exists it updates it else if not then creates a new database.further more I am making a DB class to facilitate my app,so I wont be creating an activity for my database creation.if there are possible advices, please share with me

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Android :: Thread-safety When Creating Methods - Activities Which Interact With SQLite Database

Sep 20, 2010

I am creating an app which allows for many different Activities to be started from a TabActivity(up to ~25). Most of the activities require data from the sqlite database, so when onCreate is run, an AsyncTask creates an SQLiteOpenHelper object(which will open a readable/writable database), runs a query, data is retrieved, and everything is then closed.

I was just testing messing around to see if i could break something, so i added every Activityto the TabActivity's TabHost. I then started mashing each tab as quickly as possible.

I noticed that very quickly i began to see in the LogCat: Caused by: android.database.sqlite.SQLiteException: database is locked: BEGIN EXCLUSIVE; and the app proceeded to die.

Typically there will only be about 4-6 tabs(i can just limit the user anyway) for the TabHost. I haven't been able to break anything with a small amount of tabs to mash, but i am still worried that maybe i am accessing the database in a poor way.

How can i prevent my SQLiteDatabase objects to cause a lock?

If i create a ContentProvider will that eliminate the possibility of database locking?

Do you have any suggestions for changes I could make for accessing data from an SQLiteDatabase?

I ended up taking the approach of using the Application class and storing 1 SQLiteOpenHelper and trying my best to keep it synchronized. This seems to be working great - i put all my 25 activities in the TabHost and mashed away on them with no errors.

I am calling ((SQLiteDbApplication)getApplication()).setDbHelper(new DBHelper(this, Constants.DB_NAME, null, Constants.DB_VERSION_CODE)); method(shown below) in every onCreate() in my activities

Any further suggestions to this approach or to the changes i made using this Application class?

CODE:...................

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Android :: File Dialog - Allow User To Specify Folder/filename On Storage For Creating An SQLite Database

Jan 19, 2010

Is there something like a FileDialog available? From previous threads, it appears there isn't one.

If not, has someone written one?

I want to allow a user to

a) Specify a folder/filename on storage for creating an SQLite database.

b) Specify an existing file/folder on storage card for opening as an SQLite Database.

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Android :: Full Android Database Class For Existing SQLite Database?

Aug 23, 2010

I'm trying to deploy an application with an existing SQLite database.I've been reading though the examples that are posted but they are always missing some part of the class. I feel like I'm trying to bake muffins but no one told me to use baking powder.Can someone post a full database helper class for depoying an SQLite database on Android? Edit : Delete old code because it doesn't work.

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Android :: Synchronizing Sqlite Database On Android To A Sybase Database On Server

Apr 12, 2010

I'm currently developing a Field-Service application that stores data in the local sqlite database on an android device. At some point, usually after completing the data collection rounds, the local sqlite db is to be synchronized to a remote sybase db on the server.Any suggestions as to how this could be achieved or engineered as a solution? Or even better, are there alternatives to synchronizing data in such an application?

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Android :: SQLite Creating SQL Functions

Jul 22, 2010

How does one go about adding a custom SQLite function from within the Android sqlite API? I have a function (written in C) that I'm able to add using the C API outside of Android as described here: http://www.sqlite.org/c3ref/create_function.html.

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Android :: Creating A Drawable From A SQLite Blob

Aug 20, 2010

I'm caching image files as a blob in a SQLite database. I have a similar application on another platform that does the same thing with the same image files. The databases on both platforms report the exact same size for the same images. So I think, but can't guarantee, that the image data is getting into the database intact.But when I try to create a Drawable, the console prints out "DEBUG/skia(267):decoder->decode returned false".

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Android :: Creating Database For Application

Apr 18, 2010

I have started creating database for my application. It is working well. The data is also getting stored.But the issue is that i require dropping table, that already exists, every time i run the application.

But one thing i found is that whenever i change the version of the database in my code, the table gets dropped. But i would like to know whether it is possible to drop table without changing the version number of the database.

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Android : Creating App Database With Big Amount Of Data

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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Android :: Using My Own SQLite Database

Feb 13, 2009

I'm new to Android, I just finished the Notepad Tutorials, where we can create SQLite Databases to save notes. So I wanted to know if it was possible to "import" my own SQLite database (not created with my App but with a 3rd-party software) to my project, and if the answer is yes, where should I save my SQLite databse and how can I have access to it.

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Android :: Database - XML Or SQLite?

Mar 25, 2010

I'm doing a application that will use a database with serialized object. The objects will be already serialized and the user will just display things. On a PC I would just make an XML but with android I'm not sure. Can I make an XML and "unpack" it when the user launch the application for the first time or should I do something else?

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Android :: Use Own Sqlite Database?

Mar 5, 2010

I put my database field in "assets" folder. And use the code from this blog to copy the database to "/data/data/my_packname/databases/", (This copy code i run it in the onCreate() method when i run this app) then use select * from ... to get data. But it gives me the exception: no such table. Someone told me that if i am attempting to copy the file in SQLiteOpenHelper's onCreate(), it's too late. So the copy file code can not copy the complete file. So i need to use adb or ddms to pull the database first? So, Anyone can teach me how to use my own databse?

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Can Use Own Database When Creating App

Jun 6, 2011

Is there a way that I can use my own database when creating an app?

What I mean by that is that I want the app to start with a database already loaded so one doesn't have to be created when the app is started?

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Android : Creating Multiple Tables In A Single Database?

Feb 22, 2010

How to create two or more tables in one database in single class which extends sqliteopenhelper in one function oncreate.

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Android :: How To Add Objects To Sqlite Database?

Nov 18, 2009

I have a class like class My data{ String name; int data; Location[] locality.

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Android :: Delete The Sqlite Database?

Mar 23, 2010

How do I delete the sqlite database exists in my android? There is a db behind my android qro and delete the same

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Android :: Delete Top Row In SQlITE Database

Aug 2, 2010


public void delete(String id, String name, String phonenumber, String time, String message)
{
String[] args={id};
getWritableDatabase().delete("texts", "_ID=?", args);
}

It works fine, and deletes the specified row. However, I also want to implement it so that I can delete the most recent (earliest date) entry in the database, which should be at the top of the table. I know I can do this by altering the last 2 parameters of delete, but I cannot figure out what to change them to.

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Android :: Update SQLite Database From Other App

Jan 25, 2010

Is possible update the records from SQLite from my Android Application1 from other Application2 Android

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Android :: UI Can Connect To SQLite Database?

Jul 31, 2009

Is there any UI can connect to SQLite database? I hope that I can read the data without writing code.is there any method can make it happened?

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Android :: Necessary To Close SQLite Database?

Jul 22, 2010

Is it really necessary to close an SQLite database that your activity has opened (database is in local memory or on SD card)? I would think it would be good practice, but I noticed that the Android samples such as the Notepad tutorial and SearchableDictionary sample do not do this. I've also seen sample code where the database is consistently opened, read from, and closed, but that would seem to add unnecessary overhead.

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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 :: ORM SQLite And Database Scheme

Jun 4, 2010

I'm looking for a very simple ORM framework working on Android for sqlite. I've been testing activeAndroid but none of the example could ever build on Eclipse. By the way, how do guys implements a "many to many" relationship in sqlite for android ? How do you reflect the cascade regarding deletion of rows and guarantee the database integrity?

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Android :: SQLite DROP Database

Jul 14, 2009

How to drop a database in Android SDK?

Did not see any methods in android.database.sqlite.SQLiteOpenHelper or android.database.sqlite.SQLiteDatabase classes.

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Android :: Loading SQLite Database Into App

Jun 10, 2010

I am able to create, write and read an SQLite Database in my Android App. I have a copy of the Database that is fully populated with data, and I want to get that data into the App's Database. Is it possible to access my populated database from inside my App? Or can I at least create a copy of the populated database and then use that copy? Or do I need to do a .dump and put all the inserts into the Android code?

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Android :: Use The Exist Sqlite Database?

Mar 16, 2010

I have a sqlite database, and i put this file in "assets" folder. The code like below, Pls help and tell what's wrong in this code, How to use my own sqlite database.

CODE:.............

The error message:

CODE:.................

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Creating Database Search App

Mar 27, 2014

i have a church database which i want to create an App which contains all details in the database....with a search button to search the database...

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Android :: Access A Sqlite Database That Is Not Own By My Application

Jan 31, 2010

I'm searching information about how i can access a specific database that to not belong to me, and that is store in /data/data/com.... directory is it possible without root access? it it possible with root access, and how?

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Android :: Prevent Access To SQLite Database

Oct 18, 2010

I use a sqlite database in my project. The stored data in it must not be available for the user to edit. As I've read here I saw that if you have root access you can alter sqlite database. The only solution would be to encrypt database content, but this would be time consuming for device. Any solution to prevent access to database ?

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Android :: SQLite Database Slow Insertion

Aug 17, 2010

I need to parse a fairly large XML file (varying between about a hundred kilobytes and several hundred kilobytes), which I'm doing using Xml#parse(String, ContentHandler). I'm currently testing this with a 152KB file.During parsing, I also insert the data in an SQLite database using calls similar to the following: getWritableDatabase().insert(TABLE_NAME, "_id", values). All of this together takes about 80 seconds for the 152KB test file (which comes down to inserting roughly 200 rows).When I comment out all insert statements (but leave in everything else, such as creating ContentValues etc.) the same file takes only 23 seconds.Is it normal for the database operations to have such a big overhead? Can I do anything about that?

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