I developed and install an android application which create a sqlite database.
If I uninstall this app the database will be automatically dropped?
The database is a file in private storage ( /data/data/{package.name}/databases/db.file )
when you uninstall an app the /data/data/{package.name}/ is deleted, either the user associated to the app is.
YES....
After create Database it will be located at data/data/YourPackage/mydatabase.db.
when you install application on Emulator or Phone then it will be visible in File Explorer.
This mydatabase.db file will be deleted when you uninstall your application but if you reinstall this application then this database file again created and will be available in your private folder.
Edit
Suppose you want to store some value in Database(SQLite), For this you need to create one java class like MySQLiteHelper and then you can simply write your value in database.
If you uninstall you application then your value and database will be deleted but if you again reinstall your application then your database again created but previous value will be lost.
I think so, database will be dropped with all files in your app's private folder :)
Related
I know that one instance where an App's SQLite file may be removed from the System is when the user uninstall the Application. Apart from this situation, under what circumstance(s) will the SQLite file get lost or be destroyed in the Android System?
Again, under what circumstance will the SQLite database file loose all it's content even if the App is not uninstalled?
Will there be an instance where the Android System does this?
Settings -> App -> Data -> Clear Data would also delete the SQL. Also rooted phone can do whatever he likes with the SQLite files.
There is no way that the Android system will erase or remove your file. Database files are stored, along with other app data, under {package_name}/data/data folder so no one except your app can touch it (ignore rooted devices).
Only the following can happen:
1. your code cleared/corrupted the db file
2. user has cleared app data from device settings
I have an App on Playstore. The app is named Credit Flow.It is used to track income and expenses of an individual.
I use local Sqlite Db to save all the transactions(they are not saved on any server).
I am new to pushing apk updates. My question here is that if I upload a new Apk on playstore will it erase the existing user's Local Db?
If so how can I prevent that?
My question here is that if I upload a new Apk on playstore will it erase the existing user's Local Db?
No. Assuming you are using your database in the default directory, your database will remain untouched.
The database will only be removed if the user uninstalls your application, or goes into the app settings and clears your app's data.
Also note that onUpgrade() will not be called on your SQLiteOpenHelper. That method is only called when you increment the version number passed into the SQLiteOpenHelper constructor.
No, the data is preserved. But ensure your using the same package name. Updates do not alter sharedpreferences or databases or other files that generated in run time
I am try to take backup of my sqlite database when user uninstall app. and recover that sqlite data when user Re-install app. I am try custom BackupAgentHelper but i am install app and insert data of sqlite database and then uninstall app. and reinstall app then my database is empty. If any one have solution of this issue send me source code of this
You could try saving the database to the SD Card. However, you will lose access to the database if the user changes the SD Card .
Another option would be to back it up to a server at regular intervals.
You can save data on Google drive.
Use App Folder service
https://developers.google.com/drive/web/appdata
https://developers.google.com/drive/android/appfolder
I have one question .
I am using SQLite database ,if i uninstall the app from my device database will be in device or it will removed automatically.
and if i again install the same app again what will happen.
SQlite databases are just files, and they're treated like any other file: they're stored (by default) in the application's private data area (/data/data/$PACKAGENAME/databases). They're deleted along with everything else in the application's private data area.
You can create a database on the SD card if you like. They, of course, won't be removed on uninstallation.
EDITED:
Check this Database related example HERE
Hello
In my android application when the user reinstall the app again i would like to delete the existing database and create a fresh new one.
How could i know that the user is reinstalling the app or is quering for the updates request.
How could i delete a file in raw folder?
Please share your valuable suggestions.
Thanks in advance:)
Hello In my android application when the user reinstall the app again i would like to delete the existing database and create a fresh new one.
If by "reinstall", you mean "uninstall and reinstall", your existing database will be deleted during the uninstall process, assuming it resides in the normal database location (i.e., not on external storage).
How could i know that the user is reinstalling the app
You don't.
How could i delete a file in raw folder?
In Android? You don't. Resources cannot be modified or removed at runtime.
Reinstalling application deletes all data for the application. If you mean reinstalling is upgrading then you can observe the new version number in the SQLiteOpenHelper.onUpgrade() method.
To delete the database file, it is explained here (Database Delete Android).