As you know in Android development, when you want to use SQLite, you must create another class as object that has this table's columns.
it's very boring and wastes time to do that every time you create a new table. I'm wonder if there is a helper or a method or a tool to do that easier! in eclipse/Android Studio.
And also setting that Object's items with table's rows is a very long job!
I'm sure most of developers are looking for such a tool.
You should consider looking at an ORM such as greenDAO.
This tool comes with a generator that let you define your schema to generate these DAO and Model classes.
A sample implementation I prepared for my co-workers: GreendaoSample
Related
Advise on which database on Android Studio and Kotlin
I am struggling on developing an app using Kotlin using Android Studio.
The app will have 50-100 keys/ids (lines) with each row containing ~10 pieces of data (name, dates, etc.), that can be searched through and the results shown on the app.
As I would like this to be fairly simple, what database should I be using? XML, SQLite, MySQL, etc?
Are there any simple examples that I could use please?
Really appreciate any help.
If you're looking for an offline/local database, you can use room DB instead of SQLite to avoid usage of too much boilerplate code to convert SQL queries and data objects.
You can check this link
https://developer.android.com/training/data-storage/room
I want to integrate greenDAO – Android ORM for SQLite in my project. I am a bit of confused in between Schema and DaoMaster. Do I really need to create a Schema (creating new Module for creating Schema) beacuse what I understand the DaoMaster already implement the SQLiteOpenHelper class which is used to create table in Sqlite. Please explain the significance of creating Schema to integrate GreenDAO.
Everything you have to do its create DaoGenerator like here
http://greendao-orm.com/documentation/modelling-entities/ to generate all files you need.
The Schema is used to add the entities and generate automatically all the classes needed, like DaoMaster, DaoSession and the Dao and Object for each entity.
Technically, you should be able to use GreenDao without it, but It doesn't make sense for me, since one of the best things of GreenDao is this automatic generation.
Greendao doesn't use reflection to generate a mapping between your object model and your database-model by inspecting your entity-classes. Instead greendao hardcodes your mapping by generating your entity-classes, dao-classes and so on. This is what makes greendao faster than other ORM tools.
But somewhere you have to define your mapping and this is done by schema. To keep your app small the generation of the classes in done outside of your app, which means the logic to process any kind of schema and generate something out of it is not included in your app-code.
As #Jofre Mateu said it is technically possible to use greendao without generating schema, but it simply makes no sense: you'd throw away 99% of the features greendao offers and by implementing this yourself you'd introduce bugs into your app.
I am not creating any database in android. We just copy and paste the database from assets:
getmyapplicationContext.getAssets().open(DB_NAME);
How we can integrate ORMLite with our App?
It's no difference if you're creating database with ORMLite or use existing one. Moreover usually you create it only once, and then work on existing one.
So you should probably use:
How to use ORMLite with Android
HelloAndroid example presents how your Activity should looks like
and create ORM schema classes that correspond to all your database tables.
There you can also configure correct path to your existing database file.
Good luck ;)
I'm currently trying to learn how to use a SQLite database with android. I've managed to successfully follow http://www.androidhive.info/2011/11/android-sqlite-database-tutorial/ but I'm now looking to make a table with 25-30 fields. It seems like it would be a huge task to type out all this in a similar style to that link especially as I'd want to be able to search by many of those fields.
Is there something I can use to automatically generate a database helper class with this number of fields and methods to search them? Or am I going about this completely the wrong way?
Thanks
First off i just recently started android programming also and i particularly enjoyed this tutorial about databases : http://www.vogella.de/articles/AndroidSQLite/article.html
To generate the queries i think it will be better you use an SQLite Database Manager and just copy and past your queries in the methods.
I'm creating an app which is going to have some data that is stored in an SQLite database. I want the user to be able to create "folders" which can be assigned to each data item.
I was going to do this using a one to many relationship e.g. one "folder" can have many data objects under it but having looked at relationships with SQLite and Android it seems that this would only work in 2.2+ so I'm just wondering what the alternative is?
Any information is much appreciated.
You can still have relationships; older versions of SQLite just won't enforce them. As a stopgap, you can build triggers to do it; in fact there's a handy generator that will generate the SQL for you to use as a starting point.