access to phonegap-created table using Java - android - android

I have created a table in SQLite using phonegap. How can i have access to this table using Java?
Because i have made a background process (as a phonegap plugin) which needs to retrieve data from the already made table.

Your database is located in
On Eclipse :
Window>Open Perspective>Other>DDMS
-- in File Explorer tab
data>data>your_package_name>databases>your_DB_fileName
So at any point of time if database is successfully create and available in it respective location, then you can read it programatically using the path
/data/data/your_package_name/databases/your_DB_fileName

Related

Android SQLite app, preparing for production

I have an Android app where I use a SQLIte DataBase. I am using the app and the DB is already big. Now I want to give this app with its DB to my coworkers. Where and How to put the DB for release? I have the DB in my phone but I need it in assets folder. I was trying but it doesn't work. I tried to copy the DB directly however I read that Android compress files in that folder. Please, any solution, thank you in advance.
http://blog.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/
Visit this link. It contains the easiest and well described answer for your question.
You can use emulator Like GenyMotion and any other emulator. Run your app on emulator then just go to Android Studio->Tools->Android Device Monitor Then select the emulator and in the file Explorer you can find your db file . and then export from the device and export to your desktop. here you can give it to any one.
You can use your own SQLite database by adding it to assets folder. The best way is to use Android SQLiteAssetHelper. Better than reinventing the wheel.
Here the excerpts from its readme:
An Android helper class to manage database creation and version
management using an application's raw asset files.
This class provides developers with a simple way to ship their Android
app with an existing SQLite database (which may be pre-populated with
data) and to manage its initial creation and any upgrades required
with subsequent version releases.
It is implemented as an extension to SQLiteOpenHelper, providing an
efficient way for ContentProvider implementations to defer opening and
upgrading the database until first use.
Rather than implementing the onCreate() and onUpgrade() methods to
execute a bunch of SQL statements, developers simply include
appropriately named file assets in their project's assets directory.
These will include the initial SQLite database file for creation and
optionally any SQL upgrade scripts.

Building of an sqlite database outside an android project?

I'd like to create a project which generates a sqlite database, which will eventually be used by an android application. I'd like to create this project as a standard java application, so I can hook it up to a build script etc. What's a good way to go about doing this, so that the sqlite database I output is conformant with the way android sqlite classes expect to have it in?
I could create this util project as an android project, and then I have access to all the sqlite classes, but the output sqlite file would live on an emulator instance, right? And I'd have to fire up an emulator etc whenever I wanted to run the util, ugh.
Thanks
As others have suggested, I wouldn't build a project for it, I'd find one of the existing utilities out there and create the DB that way. I use SQLite Expert.
Despite what Seva said, there are some things you have to do to make it usable by android. It's readable in any state, but if you want the framework to be able ot make use of it like intended (to populate listviews and other widgets), it has to have certain things.
1) The database must contain a table called "android_metadata"
2) This table must have the column "locale"
3) There should be a single record in the table with a value of "en_US"
4) The primary key for every table needs to be called "_id" (this is so Android will know where to bind the id field of your tables)
Then you put the DB in your assets folder and copy it to your apps data directory on startup.
A good link for this process is here.
Why do you want create a separate Java project to create a SQLite database? There are graphical shells over SQLite out there. I personally like SQLiteStudio.
There's nothing special about the way Android accesses them - SQLite is SQLite, the database format is the same on every platform. Create a new database file, create some tables in it, insert some data, then place it into an Android project and play with it.
can create you other as libray project and can attach it with your project...libaray project may be an android or simple java project as per your need...
Note: use the version of sqlite that comes with the SDK -- it's been modified slightly. If you use the off-the-shelf sqlite3 commandline tool, the databases it generates are incompatible with Android.

Android sqlite database access

I have made a sample.sql database with "SQL Lite Manager".
How can I access this in an Android project?
Put your prebuild database file in /assets directory in your apk,
and on first use copy to "/data/data/<application_package>/databases/" directory.
Now use it with SQLite Database Helper class in your android application...
For more info look at this Article
There are several steps to using an existing SQLite data base in an Android project. They are nicely described in this blog post by Juan-Manuel FluxĂ .
Basically, you need to make sure that the data base contains certain tables and column names, then when your program first runs, copy the data base from your assets or resources folder to the standard db location for your app. The latter step is best done by writing a DataBaseHelper class the way that FluxĂ  describes.

Unable to open SQLite DB created in Android (file is encrypted or is not a database)

Some of my users are reporting that they cannot correctly open sqlite databases created in Android using sqlite jdbc or other tools like sqlite browser (http://sourceforge.net/projects/sqlitebrowser/).
Here is an example database with the problem:
http://pocket-for-android.1047292.n5.nabble.com/Desktop-Version-Screenshots-Work-In-Progress-tp4383220p4456017.html
This sqlite db was created on a HTC Sensation, running Android 2.3.3 and Sense 3.0.
The exact problem is that if you look at the file in a text editor you can see a bunch of tables being created but if you try and run "select * from groups;" you will get an SQLException: file is encrypted or is not a database.
I have tried using "select sqlite_version;" to see if it is a versioning issue - the sqlite browser says 3.6.18.but different tools give me different version numbers... not sure what is going on with that.
I should also point out that my app copies the db directly from the device (/data/data/com.citc.wallet/databases/wallet.db) onto Dropbox.
Any help would be really appreciated.
The solution was that the zentus project is not working with the latest versions of SQLite.
Fortunately someone is keeping a fork maintained here: http://www.xerial.org/trac/Xerial/wiki/SQLiteJDBC
All I had to do was replace the jar with the xerial one and it all worked. Xerial sqlite jdbc is in my opinion the best way of connecting to SQLite in Java (I tried several of the libs).
I am also getting the same problem.
But once I have changed the database name it resolved.
So, just try it by creating new database

Android always wanting to create database

I'm working on a small Android database application (I'm an Android newbie). I have an existing sqlite3 database created on a different platform. When I use it my SQLiteOpenHelper always calls OnCreate (which of course fails). When I let Android create the Database all works just fine - OnCreate is called for the first time, but not subsequently.
The android_metadata table is present with local=en_US.
What's going on?
What do you mean by different platform , do you mean different android application ? If thats the case and you need to use it in this application, you would have to expose your database like a content provider to this application.
#xandy If you are doing Android development on eclipse platform then do the following.
goto DDMS --> File Explorer --> data -->data --> Your application --> create database folder if not exists.
Then there is an option for "Push a file to this device" push your database file in that. :)
Hope it helps :)

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