Android SQLite Insert or Update

Answer 1

this is your method SQLiteDatabase.insertWithOnConflict(). to understand what it does refer to this document on sqlite

Answer 2

I had the same issue, but I realized when my object already has an Id it should be updated and when it does not have an Id it should be inserted so this is step by step what I did to resolve the issue:

1- in your object getId use Integer or initialize the Id how you see fit: here is my code

public Integer getId() {
    return id;
}

2- check the Id in your method for insert or update after you put everything in ContentValues:

if(myObject.getId()!= null ){
        int count = db.update(TABLE_NAME,myContentValues,ID + " = ? ",
                new String[]{String.valueOf(myObject.getId())});
        if(count<=0){
            //inserting content values to db
            db.insert(TABLE_NAME, null, myContentValues);
        }
    } else {
        db.insert(TABLE_NAME, null, myContentValues);
    }

what happens here is that I check for Id if does exist I update that row but if update method returns -1 it means there were no rows with that Id so I insert the row, and if it does not have an Id I insert it.

hope this helps.