I am a new bee in android platform and creating an application.I Need to save few data in to database and shared between two application.The data I am using for licensing, so my question is Is it possible to others to copy my data base from 'data/data/pack_name/database_name' and put it into a new device?. Any suggestion will be appreciated.
I don't think it is possible for application B to copy application A data without explicit permission of application B. We have content providers specifically for the purpose of sharing data between application. But you can always try this out by creating and application and trying to access it's data from another application.
If the device is rooted then I believe it is possible for another application to copy your data.
Related
I'm very new to android developing, and I'm making a project in my university for an app that backs up every other application's data to cloud. So in order to do this, I have to access it. Is it possible? And is there a way to do this without rooting the device?
The app that you want to create as backup use content provider in that app for insert,add, create, delete the data.That app work like a database for you.
For second app fetch the data from the first app.
use this link.
http://developer.android.com/guide/topics/providers/content-provider-creating.html
I have two applications which resulting to use database.
Application A which creates database name DB1. This database I wanted to access in
application B. The applications are in different packages.
How can I do this ?
Application are not allowed to read private data of another application (you can do this only on rooted devices). The easiest way is to store database in some public location, but that is not recommend because any app on device will have access to database file...
Here is what you can do. You can create BroadcastReceiver-s from both sides and implement your communication protocol using message passing. Application B will broadcast requests, application A will handle that request and send result back to the application B. The only problem is that application A code must be updated to. For more info on how to use message passing, check this article
you need to have both applications installed using same user id. Add this to both manifests:
android:sharedUserId="com.abc.xyz"
I am thinking regarding the future options of my app and I am thinking of the idea of backing-up the data from the application's Database and also sharing that data with another phone, say via e-mail, messaging, Bluetooth, you name it, but basically saving it as a file and opening it from the other phone and having the same values on both phones.
What would be the best approach for such an Android application?
Would Content Providers accomplish exactly this or are they concerned with sharing data only between different Apps? Thanks!
I believe it is possible ,
If you read the documentation about the internal storage here, It mentions
You can save files directly on the device's internal storage. By default, files saved to the internal storage are private to your application and other applications cannot access them
So i believe you can copy the whole sqlite DB file to some temp location then share that file via BT or email or any other sharing option .
But DO NOTE, that the same application package can only access the file if you want perhaps another application to use the db then u need to set the SharedUserId , as mentioned here
Content Providers are generally only for sharing your app's data to other apps.
Content providers are the standard interface that connects data in one process with code running in another process.
i want to create an android application but i don't know how to use the sqlite database i already have.
In fact, i have an existing sqlite database using by an existing software application for computer. The database is stored on a server.
I want to know how i can read the database stored on the server to be always up to date when using the android application ?
I don't know if i'm clear, my english is not really good and i tryed my best to explain.
You can imagine that like a restaurant. The main application is already created but i want to develop an android application and each server has an android tablet with the application so they can access to the database when they have to.
Thank you.
you have to have the following:
Call Webservice from your android app.
the Webservice has all methods and functions that you need to interact with database on database Server.
the Webservice must return the data you need from the database server back to your android app.
Here is a good tutorial that you can start with to get clear idea in how can you use Webservice with android apps.
I use to use user.home + app_name directory under Linux and Windows. However directory given me by Android for user.home has no right to write. So what is common practice of storing application data? My situation even more complicated. The data I need to store belong not to Android application, they belong to web application deployed on Android device, so suggestion using standard Android way may not work for me.
Well, there are many ways to store data in Adroid: http://developer.android.com/guide/topics/data/data-storage.html
If you are running a web application in a Android then you need to use data storage of web apps: http://diveintohtml5.ep.io/storage.html .
If you still want to keep the idea of filesystem access through web app, maybe this tutorial may help you: http://www.vogella.de/articles/AndroidFileSystem/article.html - mind the permissions.
Although, if you need to store data in the Android system you should choose to build an android app instead of use the web app to control the local data storage. You can get data from your web app using a URL Connection (http://developer.android.com/reference/java/net/URLConnection.html) and manage the storage through the Android app.
You can store application data in three ways:
SharedPreferences
SQLite Database
file
All these files are stored under the /data/data/packagename/ directory.
You can use context getFilesDir() method. But check this article for more details.
Keystore- For Sensitive data
SharedPreferences- Easily sharable and accessible data
SQLite- Lot of data with multiple relationships