Question

at first…I don’t want it change my PRIMARY KEY….

and here’s the create method of my DB….

public void onCreate(SQLiteDatabase db) {

    String DATABASE_CREATE_TABLE =
        "create table userData ("
            + "_id INTEGER PRIMARY KEY AUTOINCREMENT,"
            + "HTTPorS TEXT,"
            + "IPHostName TEXT,"
            + "port TEXT,"
            + "userName TEXT,"
            + "password TEXT,"
            + "saveOption TEXT"
        + ");";
    db.execSQL(DATABASE_CREATE_TABLE);
}

and this is how I add row in it

    public long create(String HTTPorS, String IPHostName, String port, String userName, String password, String saveOption) {
    ContentValues args = new ContentValues();
    args.put("HTTPorS", HTTPorS);
    args.put("IPHostName", IPHostName);
    args.put("port", port);
    args.put("userName", userName);
    args.put("password", password);
    args.put("saveOption", saveOption);
    return db.insert("userData", null, args);
}

Both 2 methods up before work fine…But when I want to change Value of rows…
I use this Method

    public void update(long rowId,String httporS, String IP,String Port,String userName,String password) {
    ContentValues args = new ContentValues();
    args.put("HTTPorS", httporS);
    args.put("IPHostName", IP);
    args.put("port", Port);
    args.put("userName", userName);
    args.put("password", password);
    args.put("saveOption", "no use");
     db.update("userData",  
    args,               
    "_id=" + rowId,         
    null                
    );
}

It runs normal,and the correct values 「do」 get in this Method…

but the db’s data didn’t replace

why is that?

thanks for your help!

Answer 1

_id is an INTEGER

Your rowId should be modified to an integer to update the db.

public void update(long rowId,String httporS, String IP,String Port,String userName,String password)

long -> int