I am working on project where I need to load data from local mobile DB(SQLite) to UI in meanwhile load data from server and when data download is finished insert the data from server to the database and update UI. I searching for way to download data from server and instead of delete all data in database and insert the new valid data just find the changes and "update" database. Is there some correct way to do this. I am working with SQLite database on Android phone.
SQLite isn't an online database meant to be ran on a server.
There aren't any free SQL Server options that I know of, but the NoSQL options include Firebase Realtime Database, Firebase Cloud Firestore, Realm Platform, Couchbase Mobile, Parse Server, etc...
Each of the listed options allow you to listen only to changes in the data. SQLite does not provide this option itself.
Related
I am new to Android and my requirement is this. I am in need to develop an application that will list all the events (past and upcoming). These event details , I will fetch from tables and that table will have only past events. For the upcoming events, I will be inserting into the table which will create a notification for the same.
My doubts:
What is the table I should use (SQLite(inbuilt) or MySql from any hosting services) ?
If SQLite, Is there a way from GUI, I can insert data so that it will reach all users having this application?
To be simple, how I can achieve this entire functionality?
Thanks in advance!!!
What is the table I should use (SQLite(inbuilt) or MySql from any hosting services) ?
If you want all user devices to access the same database, you will have to setup a MySQL server. As soon as the database is updated in your host, the changes will be reflected in the users apps - as soon as they reload the view or a new request is made. You can query your database every N seconds to keep things updated.
MySQL will be my choice or MariaDB, MySQL's community fork.
You can start with this tutorial:
http://dev.mysql.com/doc/refman/5.7/en/tutorial.html
I need to update and insert rows in Sqlite from another app. I am working on an android app and I have to update database of another app,how can I do that,is it possible to access and edit another app's database from my app.
You should look at Content Providers. From the android official docs
Content providers manage access to a structured set of data. They encapsulate the data, and provide mechanisms for defining data security. Content providers are the standard interface that connects data in one process with code running in another process.
Android Docs explain how you can use it.
I understand what you are trying to achieve. correct me if i am wrong. You are developing android application in which you are trying to update your application database by fetching data from some different database. right? if yes, you have to get details of the database server /database connection details from the database owner if possible. in case if the owner of the database is not providing or not ready to give you credentials/database connection details then confirm whether they have any services/webAPI/web services through which they expose database data.
If they have webapi/webservices available then you can easily consume in your andriod application and do what ever operation you want to perform.
Hope this helps..
I have an Android application with a user authentication module. Currently the system checks the user name locally. I need it to connect to a remote database server and check the user names by looking at the remote server. What is the most efficient way to do such task on Android?
We can use Mysql server . We need to use the website in between the android app and database.
The android makes the call to website and the website request to mysql database .In return the mysql database provides the data to the website which further returns the json format to the application. finally the data from the web is parsed and used in our application.
For more detail about Mysql with php click here
Im looking to connect to a URL and download a file (.db) and if it is of a higher version then update the database on the app. e.g. currently using Database1.db and this online one is Database2.db. However I'm not really sure how to go about this. Im using sqlite.
Thanks
From server end:
Instead of uploading database from url you can post xml or json data
which will give details bout database version and sql query
From android program
connect to url get the data check for the version if version from url
is higher than that of existing one then execute the sql query that
you got to create database and take backup of your data
Scenario
Lets consider one scenario you have some data in a table named y in
old database. but the new database which you are downloading doesn't
have that y table but it has some new table then what do you want to
perform with that data. Do you want to discard or store if store and
use then to where you want to store.
I'm in the process of designing an Android application right now.
I understand SQLite works on the phone device within the file structure. However I'm not sure if it's practical for our use.
If I'm wanting to store data that's available to all users (i.e. if someone updates their profile, it can be seen by all other users), can that be done using SQLite somehow? Or must we use a client-server model such as MySQL?
Is it practical to store user-specific information using SQLite and public information using MySQL?
Thank you
What you want to do is a Client-Server Architecture, store the data in your central server and get a copy of the working data on the phone. MySQL and SQLite don't share everything but it's close. Read the documentation on SQLite and you will see.
SQLite can't serve files like MySQL if that's your question via the network. You'll have to write that on your own. I suggest making a webservice.
If you want info to be available to all users you need a client-server model such as MySQL.
If you use SQL Lite, the only possible way to update that info without requesting it from a server is to make an Update on the application (not doable).
Don't forget that you'll require internet ON for these types of applications.
you mean all users going to use a single phone, probably not, the reason for recommending sqlite database for android is that its the lightweight, non memory eater and thus best suitable to mobile phones. Sqlite database can be used in phone while at server side we can use any. The only thing is use a method like sending xml request to server from phone, where server will send respond as xml or json, while the phone parse the xml and use the data in it. this is how online apps works in mobile phones..... ya ofcourse use mysql at server side and do the communication using as request - response yes the client-server.
Is it practical to store user-specific information using SQL Lite and public information using MySQL?
Yes, This is exactly what I'm doing with my app. It's a very common practice. I am storing information in a MySql db stored on a server that all users can read from. They can pull specific information to the device. From there I have a class in the app that stores information that they've selected within a SQLite db. You'll easily be able to add information to the MySql db on the server that all users can view.
yeah i think the model you are proposing should have no problem. Even i'm using a model something similar to what you are saying. I store some information on local sqlite db and majority of information in mysql db. For sending data from android device to mysql db you will have to write a mysql scipt on a page and android device will hit that page with the help of http request. You can send your data in that http request