I have been searching for this for the past few days and every tutorial I see needs for me to use an external package. Is there anything built into the Android SDK that would allow me to create a database? I thought I saw something on it a long time ago, but I can't find anything to back that foggy memory up.
Do you mean creating SQLite database? The SQLiteDatabase::openOrCreateDatabase() will create sqlite database and it's part of the android SDK:
http://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html
Related
I've been developing an android app for the last year or so in android studio. It has been in the play store since October and quite a few people are using it.
I have received many requests to create the same app for iOS and so after a lot of research I've settled on xamarin forms as it will be easier to code (as I'm familiar with c# and xaml) and less work to maintain the app for both platforms at the same time (even though it will take a while to port the code over).
The android app is using sqlite for data persistency and the xamarin version will do the same.
My question is, how could I port the sqlite databases of existing users to the new app once it is released? Is there a way to define the table/column names the same as I have set them in the android studio version?
Currently the app has a feature to export the database to the Downloads folder and the xamarin.forms app will import it from there.
I haven't seen anyone in any tutorial explicitly define the table and column names in their xamarin.forms sqlite implementation so I'm a bit worried to take the leap.
Is there a way to ensure that existing databases will work out of the box once imported in the xamarin.forms app? If not, could someone please point me towards a piece of code that will migrate data from one dB to another?
Thank you in advance for your time.
Regards
As I got a bit more familiar with the SQlite package in Xamarin.Forms, turns out that the answer is as simple as adding the [Column("my_column")] attribute above the property in the model. This way it will name the column to whatever is specified in the brackets and I can make sure it matches the database schema I have in my current project from Android Studio.
a bit of a "duh!?" moment here for me but thank you to all who have taken the time to answer!
I've been messing around with an Android project that uses a room database. Because I didn't design the database before I started (I didn't initially plan to even use one), it has a bunch of migrations that drop and recreate tables all over again.
I've never released the app since it's kind of a learning project, but if I ever show anyone I'd rather not show them the 3 migrations in a row where I drop and recreate the table. Is there a way just to tell it to use a completely new schema, as if it had never used one before?
Turns out I hadn't been wording my Google searches properly. I should have searched for how to reset to version 1 since that's a lot clearer than dropping tables or schemas.
See this stackoverflow link below to see what answered my question:
Room persistent library reset version to 1
I am currently working on an Android project and will have to manage database connection and queries to store data. I will not be working with SQLite as provided by the Android device and using it is not an option.
As I need to build quite a lot of queries I wanted to use a library or framework to make the task easier. Looking at what was available, it seemed easiest to use a framework such as, for example, QueryDSL.
However, since I am working on Android, I am not sure if the framework is usable and what using it would entail. Does somebody have experience using an external database with Android and have any recommendations?
The recommended way to connect to an external database is to use a REST client.
See this post
I am new to developing anything and want to make an Iphone like spinner that pulls information from database and return info contained in database
I have checked all the spinners out on How can we create iPhone-like spinners in android? and like the I phone one it is based of off javascript and html
want my database to be similar to this
http://www.portlandbolt.com/technicalinformation/bolt-torque-chart.html
any ideas on how to accomplish this or code snippets that would help.
I am also having problems setting up a database I am using Eclipse Helios and have been unable to install dbEdit and jdbc drivers tried many tutorials but no luck, would it be better to try a different IDE like netbeans?
Forget about JDBC when programming for Android. Take a look at the notepad tutorial, for a decent introduction to using a database from an Android app.
For a good looking spinner, take a look at http://code.google.com/p/android-wheel/
I recommend that you use the standard Eclipse tooling, as it works well (in my experience), and it has a lot of community support.
I'm looking to implement my first Android database, but I have so many questions which (I believe) are unanswered by all the tutorials I find.
Here are my needs:
- I want my application to have a database that is persistent. If my application closes and launches again, there is already a database to pull data from. It does not create a new database every time the application is killed and re-launched.
- I want to implement versioning. Say version 1 of my application has a few tables. I release version 2 and I want some sort of script to run to add new tables I've added or modify old tables I've added; and so on and so forth. The application has to know whether the database is at a particular version (which means I'll need a table in the database) so it knows whether to run this script.
Could someone provide me with some resources so I can figure out how to do what I need? Thank you
Look for sqlite+android+tutorial:
http://www.hdelossantos.com/2009/12/23/creating-a-sqlite-database-in-android/
http://www.hdelossantos.com/2010/01/07/using-a-sqlite-database-in-android/
and some more:
http://www.google.com.hk/search?sourceid=chrome&ie=UTF-8&q=android+sqlite+tutorial
There is also a sample in the sample programs that come with the SDK, i.e. the Notepad app.
And the official developer api doc - but that's more as a reference, not as tutorial:
http://developer.android.com/reference/android/database/sqlite/package-summary.html