Sending arrays with Intent.putExtra

Question

I have an array of integers in the activity A:

int array[] = {1,2,3}; 

And I want to send that variable to the activity B, so I create a new intent and use the putExtra method:

Intent i = new Intent(A.this, B.class); i.putExtra("numbers", array); startActivity(i); 

In the activity B I get the info:

Bundle extras = getIntent().getExtras(); int arrayB = extras.getInt("numbers"); 

But this is not really sending the array, I just get the value '0' on the arrayB. I've been looking for some examples but I didn't found anything so.

Answer 1

You are setting the extra with an array. You are then trying to get a single int.

Your code should be:

int[] arrayB = extras.getIntArray("numbers"); 

Answer 2

This code sends array of integer values

Initialize array List

List<Integer> test = new ArrayList<Integer>(); 

Add values to array List

test.add(1); test.add(2); test.add(3); Intent intent=new Intent(this, targetActivty.class); 

Send the array list values to target activity

intent.putIntegerArrayListExtra("test", (ArrayList<Integer>) test); startActivity(intent); 

here you get values on targetActivty

Intent intent=getIntent(); ArrayList<String> test = intent.getStringArrayListExtra("test");