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I want to know the concept of database in Android. As I understand that using SQLite database we can make , update database but I am unable to understand that how the sign-in option will be added to Android app. Will it be an app that will be work as a server? And the data of login user will come from server?
Depends on the way you design your app. Usually, the sign-in feature is done by providing an option to enter the sign-in credentials in your app, and the server verifies the data that is entered in your app. You don't want to store the entire database on your app, as it is safer within your server. Again, depends on how you design the app.
SQLite is embedded into every Android device. Using an SQLite database in Android does not require a setup procedure or administration of the database
onCreate() - is called by the framework if the database is accessed but not yet created.
onUpgrade() - called if the database version is increased in your application code. This method allows you to update an existing database schema or to drop the existing database and recreate it via the onCreate() method.
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Very simple question here; I want to have a database that can be access through the web and through an android APP.
What are the steps that I should take? Is there any good tutorial? I am far from professional in this field and looking for a very simple guidance to where to start.
Should I use an SQL Database and React?
Thanks
You have to chose if you can have direct access to the database (insecure) or if you want to access it over a API.
Access with API
You can create an API, with which you can access the data of your database. You will find alot of examples and tutorials on the internet. Example: Create a Restful API
Make a server-client application
You can create a server, which is running on a hosting or server-pc, which then queries the database and returns the result to the client.
With Next.js you can setup such a application easy. Next JS Website
Direct connection
If it doesnt matter that users have direct access to database, you can directly connect to the database.
First you need a package, which can access a database. You can decide if you want to make simple queries to the database or if you use a ORM-mapper, which can make data-access easier.
Database Access Packages
MSSQL
MySQL
Mongo DB
ORM
Type ORM
Install one of these packages and query the database.
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Can we Use phpmyadmin and Firestore in a same Android App ?? Assuming if one part of the App contain a realtime feature (Chatting App),for which Database is Firestore And other part contain simple user features like viewing the stored data in Database(eg. Wikipedia),lets say it's DB is PhpMyadmin. will it be posssible ?
Yes you can. I did that recently in a project. Firebase is very easy just check the documentation.
You can actually use Firebase for everything. including storing and retrieving data. but, if you want to use another online DB, Web server or API that's totally doable.
I would recommend that you do a separate demo project using firebase and another Retrofit for example.
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I'm basically creating an android application which takes around 8 forms (forms consist of EditText field and CheckBoxes) and will store them in a database, so that it can be later synced/added to a pre-existing database (Microsoft SQL 2008).
Which would the best way to store and sync (maybe daily or weekly) data to a pre-existing database in my case. I do not have much experience in android backend, as I've only ever worked with shared preferences to store data locally, so a simpler solution will ease this process. Cheers!
Edit:
TLDR: This question was asked to find out, which route shall be taken when one needs to store data taken from a form filled by the user so that it can be later synced with an existing database (which in my case is a Microsoft SQL 2008). The main aim of the android application was get the various databases and push it to the cloud.
As of 24/1/17: I've created a SQLite Database and have begun storing the data, I'm still not sure which method would be the best to export the data. I will keep on documenting the progress.
You could look at azure cloud services link, you need some knowledge about odata.
or
You could try firebase link, understanding of json is required.
Because you have knowledge about sql I suggest you have a look at some tutorials for linking sql with azure or sqlite with azure.
Use a POJO and store them to firebase. Check this and this or watch this video. hope it helps.
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Hey guys I'm working on an Android App with Android Studio and I need a database like mlab(mongoDB). But Android doesn't support mlab. I can't just use SQLite because my data has to be saved also when my application is not running.
For example if my user signs in, their profile photo and other information should be saved in the database and I also want to code something like a friend request which also should be saved in the database.
I googled so much but I didn't find a good solution.
I hope someone can help me.
You asking about two separate things. mLab is a Database as a Service which uses MongoDB, while SqLite is just a database.
You can save data while your application is not being used with either option, simply look into background Services and other parts of the Android API that allow background tasks.
If you want to save data to a database that is not on the device, you'll need to look into the documentation of the service to determine the best way to interact with your database. In the case of mLab, they allow both custom drivers and a REST API for interacting with your database.
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I am working on an android project that uses an offline database. When it is connected to internet, the database should be updated. Another one of my requirements is that the database should be able to connect to SAP. Which database is better to use? SQLite or SQL with PHP? Any suggestions?
Assuming you want to create a database on a server, you should probably go with MySQL (SQL is the query language, MySql is one of the most widely used database engines). According to this thread, SQLite will only support one writer at a time and is not mean for "enterprise level" data management. However, it is faster and has less overhead, so if you did need a db on your mobile application, I would go with SQLite
SQLite is a lightweight version for mobile so it is the best choice for an offline mode.
Firebase is used to store data online and sync them with every connected clients.
See firebase.google.com
There is a Getting started section for Android, iOS and web platforms.