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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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(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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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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I need to have an android app that can read and write to an online database, and a windows pc app that can do the same. Basically I want to view/modify a set of data from the database from both my mobile and pc.
I considered using firebase as the online database for my android app, but I don't know if can query the data from my windows pc, if say I am using Qt to program a windows app.
Please help !
Even it's a broad question a quick answer would be yes, you can query the data from your Windows pc. There is an interesting articole written a few moths ago named Firebase Database REST API for QT.
Take a look a this post for a better understanding.
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There is no .db file in file explorer in android studio for my app. I want to see the database of this app. I want to see the database of android app,that app is using SQLite concept.
That's completely normal. You can only view the sqlite database of your application if your device is rooted, or if you're using the emulator.
Without root, you can only access sqlite programmatically through your own app, even if you're just trying to see if things are working.
This is by design, sqlite on Android is a file-based database that piggy backs off the file security system of linux. In android specifically, each application is given its own home directory which only it can access, and no other application can.
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I use Android Studio - How do you go about testing the official examples such as this?
I do not want to have to copy and paste all files into my project.
Are you new with android , you can test these applicavia developer mode on your device using ADT Bundle or android studios IDE for android
for such thing you have to write down or copy paste the code into your project and then when you are done attach your device to your system and turn on developer mode and try running application on device and test this application