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Wich software should I use to create databases to be used in an Android application? I never had any experience with it and have no idea where to start.
Just addthe db file to your assets. Then copy it from assets to internal storage on startup if it doesn't exist yet. Use a script on your PC to build the db file (sqlite runs on PCs as well).
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(How) Is it possible to extract the sql-file from an android application on my pc? We developed an app and used it on some devices but unfortunately some of them didn't save the information on our web interface. So we need the database from three phones and typing by hand is out of the question.
Yes, depending on where it is saved you can access the .db file via the device file explorer on the right in Android Studio.
I assume it is in data/data/yourPackageName/databases
There should be .db files, but again, they could be somewhere else depending on the way you created it.
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I hope this doesnt break the site's rules:
My question is what i posted in the title:
If i use the ROOM functions in Android Studio and then test my app on a cell phone emulator, where on my computer, is the database stored?
Inside your, Android Studio go to Device File Explorer
Then go to data->data->AppPackageName->your_db
Then right-click and extract or save it to your PC and then you can view it and also perform Query using some SQLite browser
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i developed an app in android wich use a database to save and load data at start. My question is: was it encrypt by default? if not, how can i encrypt my database file in order to make it more secure?
was it encrypt by default?
No.
how can i encrypt my database file in order to make it more secure?
Use SQLCipher for Android and a user-supplied passphrase.
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I have a database format JSON (for example, data.json), it is possible to add this file in the application and use as a local database? When developing an application to add the file, and when removing applications from your device, removing it along with the application.
You can create a folder named "raw" in /res/ and then you can access it at R.raw.data.
Pretty sure since it's within the context of your app, if the app is removed the data is as well.
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So how di I manage a Android database which isn't even located in the assets folder. I followed this tutorial, and it's great, but what if I want to delete and add information to tables manually?
http://www.java2s.com/Code/Android/Database/Createdeleteupdate.htm
You can use other software to modify you Database simply by opening the assets file with that software.
Here is SQLite Expert that is recommended for modifying your Database