I’m trying to develop an app with Room. The project is in java. This is my first time using Room. I’ve followed the documentation and created class with @Database, @Dao & @Entity. However when I run the app, it throws the following exception. Can someone please help me figure out what am I doi…
Tag: sqlite
Retrieving image from SQLite Database (BLOB data type)
I have tried to retrieve the byte[] from my SQLite DB using the code: Error returned: Answer Your query: returns only 1 column and since the column indices in a cursor are 0 based, you should retrieve it with: Also, you should use moveToFirst() to check if the cursor returned any rows before retrieving the co…
Room Database. Insert sucessfull but no data found
I’ve got a simple Room database setup as seen below: Entity Class My Dao Interface: My Database: Finally my ViewModel: And my Activity where I print the results: As you can see from the code, I first try creating a default user in my database. If the insert is sucessfull, which it is cause I always ente…
i cant update value in SQLite
I have this table to sqlite: And this is my method to Update value: And i add a object variable in my activity: So, in activity I use this to change value using update method: But this not works because when I press the button: Class: Nothing happens because the value is (1) one all the time. What’s wro…
Select multiple data from SQLite database based on multiple tags
I have an SQLite database with some to do lists. Each to do list, there is a column for tag. Here is a sample layout of my SQLite database Let’s say I want to select the to do lists with tags containing “Me” and “Mom” (ie “Buy groceries”, “Study” and ̶…
android.database.sqlite.SQLiteConstraintException: UNIQUE constraint failed Couldnot figure out what the error says
I have got stuck in the above-mentioned error message in Android Studio. My Database is a simple one 1st column: Name TEXT PRIMARY KEY 2nd column: Price TEXT I have already gone through the answers to the same question in StackOverflow but couldn’t resolve the error. I am quoting my DataBaseHelper class…
org.json.simple.JSONArray cannot be cast to class org.json.simple.JSONObject
I keep getting this error and already searched a lot and cant seem to solve it. Basically i am trying to read a json file and store some of its data in a database. Hope you guys know how to solve this! This json file is from a statistics site and i want to store the most important data in
SQLite does not update the date value
I am trying to update the date value in the database which is hold as a text, however I stucked here, it takes the user correctly, but does not update the current date; The part that I try to update the date, the app is closed suddenly; Answer Seems like SYNTAX (May be Quotes) issue costs you. You can try
Populate single TextView with multiple SQL columns using SimpleCursorAdapter (Suggestion for searchbox)
I’m using SQL as datasource. My app’s searchbox has autosuggestion, but currently it’s only able to return the results of 1 column (e.g. column1). I want it to be able to search in 2 columns (so, column1 + column2) and show both column’s result in the autosuggestion dropdown. This is t…
Delete the first 8 rows from an SQLite database
I delete rows in a SQLite table with this: I need to delete the first 8 rows when the database has a size bigger than 8 rows, so: The method Events’s getRowCount is: But When I set the while loop in checkRowSize it delete the all database. Why this? But If I set: It just delete the first row every