How do I store multiple values in an array in Android?

Question

For this example I have an array:

String[] books = new String[x];

I would like to store the id and title in each location:

books[0]=>id:0, title:"book title1"
books[0]=>id:1, title:"book title2"
books[0]=>id:2, title:"book title3"
books[0]=>id:3, title:"book title4"

I want to store the id since it may change. I'm getting the id and title from a database. Getting the info isn't the issue. I want to store it this way so in my other functions this returns to I can use something like:

btn.setText(regions[i].title)

Any suggestion on how to handle this would be great.

Why don't you create a Book class, that has id and title as class members? — gunar
– gunar, Commented Nov 27, 2013 at 4:22
Use can use an ArrayList of Pair<Integer,String> objects.. — Amulya Khare
– Amulya Khare, Commented Nov 27, 2013 at 4:26
you would want to brush through OOP concepts AND Collections and figure out an approach for it is pretty straight forward. — stack_ved
– stack_ved, Commented Nov 27, 2013 at 4:31

Mohan Raj · Accepted Answer · 2013-11-27 08:20:59Z

3

Do one thing, first create a bean class like BookBean. Under this declare two variables ID and Title. and declare getters and setters (If u are using eclipse u can easily do this by (Source -> generate getters and setters.. option) and then declare a ArrayList to store BookBean vale as of follow.

 ArrayList<BookBean> bookArrayList=new ArrayList<BookBean>();

   for(int i=0;i<=urSize;i++)
   {
    // create a object for BookBean 
    BookBean book =new BookBean();
    book.setID("what ever");
    book.setTitle("what ever");
    bookArrayList.ass(book)
    }

edited Nov 27, 2013 at 8:20

answered Nov 27, 2013 at 4:33

Mohan Raj

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Comments

Ram kiran Pachigolla · Accepted Answer · 2013-11-27 04:34:25Z

2

It is better to use Arraylist with custom class.

see this

class Book
{
   String id,title;

   /* Cunstructor to store data */
   public Book(String id,String title) 
   {
       this.id = id;
       this.title = title;
   }
}

//declare arraylist
ArrayList<Book> bookList = new ArrayList<Book>();
bookList.add("1","book1");
bookList.add("2","book2");
bookList.add("3","book3");
bookList.add("4","book4");

btn.setText(bookList.get(i).title)

answered Nov 27, 2013 at 4:34

Ram kiran Pachigolla

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1 Comment

gunar Over a year ago

you meant: bookList.add(new Book("1","book1"));

Viswanath Lekshmanan · Accepted Answer · 2013-11-27 04:25:22Z

1

I think you have several options

Use a HashMap where you can use your id as key and value title
Define a class and keep id and title as attributes , define get and set methods.

Keep the objects of the class in a ArrayList

answered Nov 27, 2013 at 4:25

Viswanath Lekshmanan

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