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Lukas Baumgartner
14,817 PointsBest way to build/store items
Hey!
In my app I'm making, the user can tap on a floating action button to open a dialogue to give an item of a recyclerview a name and choose a picture that should be displayed in this item.
Now my question: What is the best practice to do that. Make 2 empty arrays, one for the strings, the other one for the ressourceid's of the pictures, and store them there? Or is there a better way to do so.
Thanks in advance for your advices!
4 Answers
Lukas Baumgartner
14,817 PointsIt should be paired.
Daniel Bowen
8,577 PointsEspecially with it being a string paired with a string, in other languages I would strongly recommend a tuple, and I found one a while back that works fairly well for me.
public class Tuple<X, Y> {
public final X x;
public final Y y;
public Tuple(X x, Y y) {
this.x = x;
this.y = y;
}
}
Seth Kroger
56,413 PointsFYI, Android has a built-in class for that: android.os.Pair
Daniel Bowen
8,577 PointsThanks, was actually unaware of that built-in class.
Lukas Baumgartner
14,817 PointsIn the fragments course where we built the smells like bakin app, ben used simple arrays to set the data for the single items for the list.
Can i use just arrays that have null valies and fill them with the data the user puts in?
Daniel Bowen
8,577 PointsWell, as long as you know exactly how many values you'll have, that'd be fine. I assumed you were asking due to performance concerns, or simply learning.
Lukas Baumgartner
14,817 PointsI finally made it with 2 arraylists, i use the add and remove method on both arraylists where I store the String in one list, and the ressource id in the other list. I'm trying to make use of a single array list where i store the string and the ressource id in. I'm sepperating them with a '. I keep you updated how it works out :)
Daniel Bowen
8,577 PointsDaniel Bowen
8,577 PointsNot 100% clear, are you wanting to keep the data paired or separately traversable?