Having the weirdest issue here, all is working fine, except that my 1-to-M query is duplicating the data. Customer table Invoice table CustomerInvoice relation DAO If I debug my application, set a breakpoint to test the Room stuff, then use the ‘Evaluate’ feature in Android Studio, I do the follow…
Tag: android-room
Room Database Empty when Restarted App ( Same DB Name)
I am newbie to the Android X Room Database. Earlier I used Sqlitehelper class to access the sqlite databases and then migrated to room. The question is , when I insert data into Room database table it stores for that moment and when I restart the app the data is gone. I want to have multiple tables in a singl…
How to load a different database file with Room?
Goal I have an app with plenty of data, with a switch button, which switch the language (french or english) of the entire app. However, some of my data are stored in a Room database. I have two .db files : database_fr.db and database_en.db. Let’s say the app is currently in french, with the database_fr.…
Room database reset to default values which was set by prepopulating database when clearing app from background
I have a database which is prepopulated with some tables which is working fine. I have prepopulated my db. like this the problem I am facing is that. when user adds his own data it got inserted correctly and displayed on my screen. when I move app to the background and remove it from there and reopen the appl…
What should we do for nested objects in Room? [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed last year. Improve this question If there is a structure like my JSON structure below, how should we create Entity Classes? The…
Android get ArrayList from Room Database in adapter class
I have a Room Database table with multiple columns (PartsTable). I need to fetch only one column from the table that contains one word String and I’m using a subset of a table as per google docs (PartsTuple). Now I need to create a function that will or something else that will return the ArrayList of f…
Why can’t my phone app open a file it stored in a Room Database?
Problem: My Android phone app can open various file types stored in an Android Room pre-populated SQLite database but it cannot open files the app itself has added to the pre-populated database (except it can open .txt files). I believe the issue is probably with how the I coded the copying and conversion of …
Getting UNIQUE constraint failed: tbl_data.id (Sqlite code 1555 SQLITE_CONSTRAINT_PRIMARYKEY) error in android studio room
I’m getting this error while i have initialize the id as primary key and i added the unique attribute. Data class code : Data Base Class code : and main activity code : and full error in logat : 2021-11-07 12:20:45.070 24994-24994/com.mohajer.kitset2 E/AndroidRuntime: FATAL EXCEPTION: main Process: com.…
error: Not sure how to handle insert method’s return type
So I’m trying to use Executor execute the Dao’s in my android app, but when I created the Executor, it said it required the method being run to have a Runnable return type? So I made them all return Runnable, but now Android Studio gives me the error: Dao: Repository: Dao_Impl I’ve been told…
How to make context not null in onCreate()?
I’m trying to get the context in the onCreate() method, to use in my RoomDb repository, but it keeps giving me a NullPointerException. repository I’ve tried to look through other explanations, but I just can’t wrap my head around it. I’ve tried GetApplicationContext, and this. I’…