Question

I am new in android programming.
Here is my question

I tried to declare an array before onCreate() method like

int[] userselected;

Note that i want to use this array to store ids of buttons user had pressed.
Then i tried to find no. of elements in this array with

int noOfElements = userselected.length;

which game me an error.
Then I changed declaration to

int[] userselected = {};

it worked, but when i tried to put an id in this array with code

userselected[1] = R.id.textview1;

it again gave me an error.
I also tried declaring array as

int[] userselected = new int[4];

but then, when i tried to find how many elements have already been stored,
userselected.length

always gave number 4.

Please tell me, how can i get what i want

Answer 1

You need to use ArrayList. It will give you a more flexible structure giving your case.

ArrayList<Integer> userselected  = new  ArrayList<Integer>();
userselected.add(R.id.textview1); //To add id.
int noOfElement = userselected.size(); //to get size