我可以使用此列表来填充Arrayadapter吗？

Question

Can I use the code below to feed my adapter? If so, any idea how cause I seem kinda stuck. If not, is there another way to setup the arraylist so I do get 3 options per page without having to make a new class/arraylist for each food. (might be a large amount of classes if thats the only way)

I set it up like this because each button will have a different time value to put trough to the next page.

(in example) If, on the previous page, user selects the item "artichoke" than a new page should load with the 3 buttons mildly, medium & well done (which will also have different boiling times each).

   package diederik.lucas.boiltime.data;
import java.util.ArrayList;
import java.util.List;

public class TimeOneData {


    private List<Time> Times = new ArrayList<Time>();
    public List<Time> getTimes() {
        return Times;       
    }

    //Not sure if void is the correct return value here
    public void asparagus() {
        addItem(new Time ("Mildly","6"));
        addItem(new Time ("Medium","8"));
        addItem(new Time ("Well Done","10"));
    }

    //Not sure if void is the correct return value here
    public void artichoke() {
        addItem(new Time ("Mildly","5"));
        addItem(new Time ("Medium","7"));
        addItem(new Time ("Well Done","9"));
    }


    //Not sure if void is the correct return value here
    public void beetroot() {
        addItem(new Time ("Mildly","7"));
        addItem(new Time ("Medium","10"));
        addItem(new Time ("Well Done","13"));
    }

    //Not sure if void is the correct return value here
    public void broadBeans() {
        addItem(new Time ("Mildly","1"));
        addItem(new Time ("Medium","2"));
        addItem(new Time ("Well Done","3"));

    }   //Not sure if void is the correct return value here
    public void broccolli() {
        addItem(new Time ("Mildly","4"));
        addItem(new Time ("Medium","8"));
        addItem(new Time ("Well Done","12"));

    }   //Not sure if void is the correct return value here
    public void cabbage() {
        addItem(new Time ("Mildly","3"));
        addItem(new Time ("Medium","6"));
        addItem(new Time ("Well Done","9"));
    }





    private void addItem(Time item) {
        Times.add(item);
    }


}

Context: I am a beginner trying to learn Java + android app building. Please try to keep this in mind if you are kind enough to write me an answer! ty!

Answer 1

You should use an Enum to structure your data. As Enums are objects they can have attributes and methods , you can set up a VegetableTime enum having an ArrayList of times attribute.

Then you can use that and if you need a list, you can get them by using VegetableTime.values();

By the way, "Mildly" & co should also be an enum (that could sit in Time class).

Code example, here's a way to define what is a CookingTime with it's two parameters.

public class CookingTime {

    public enum Preparation {

        MILDLY, MEDIUM, WELL_DONE;
    }

    private int time;
    private Preparation preparation;

    CookingTime(Preparation preparation, int time){

        this.time = time;
        this.preparation = preparation;
    }
}

And here's a Vegetable with inline creation of the right list for this cooking.

public enum Vegetable {

    ASPARGUS(Arrays.asList(new CookingTime(CookingTime.Preparation.MILDLY, 8), new CookingTime(CookingTime.Preparation.WELL_DONE, 15)));

    Vegetable(List<CookingTime> cookingTimes){
        this.cookingTimes = cookingTimes;
    }

    private List<CookingTime> cookingTimes;
}

Answer 2

Ok this is what I came up with:

Enum:  

public enum FoodTimeEnum{

ASPARAGUS ("2",  "3", "4"),
ARTICHOKE ("8",  "12", "16");
//more veggies


private final String mildly;
private final String medium;
private final String welldone;

private FoodTimeEnum(String mildly, String medium, String welldone) {
    this.mildly = mildly;
    this.medium = medium;
    this.welldone = welldone;
}

public String getMildly() {
    return mildly;
}

public String getMeduim() {
    return medium;
}

public String getWelldone(){
    return welldone;
}

}

and in the Timeclass

public class Time {
    public String timeName;
    public String timeMildly;
    public String timeMedium;
    public String timeLong;



    public Time(String id, String boilTime, String mildly, String medium, String welldone) { 
        this.timeName = id;
        this.timeMildly = mildly;
        this.timeMedium = medium;
        this.timeLong = welldone;

    }

    @Override
    public String toString() {
        return timeName;
    }

}