ClassCastException: java.lang.Object[] cannot be cast to java.lang.String[][]

Question

I'm having a problem with Android when passing a 2d array to another activity. I have no problems sending it through a extra as a serializable. But when receiving it, i get the following error:

E/AndroidRuntime(7396): Caused by: java.lang.ClassCastException: java.lang.Object[] cannot be cast to java.lang.String[][]

I'm using the following code:

public void getMatriz(){
    Bundle extras = getIntent().getExtras(); 
    if(extras!=null){
        String[][] matriz = (String[][]) extras.getSerializable("matriz");

    }

}

Can someone help me solve this problem? Thanks in advance.

I think the exception is self-explanatory. You can't cast an array of array to an array. You need to do manual conversion. — Rohit Jain, Jul 16 '13 at 17:33
@RohitJain I don't understand. It is not an array of arrays, it's a 2d array. I did this following examples I found in StackOverflow. — user2588434, Jul 16 '13 at 17:43
According to http://stackoverflow.com/questions/12214847/pass-2d-array-to-another-activity this should work. Just to confirm, you're setting the extra with `setSerializable`? — fadden, Jul 16 '13 at 17:57
@fadden Yes, I used that example but I get this error. I set the extra with setSerializable just like that post says. — user2588434, Jul 16 '13 at 18:20

score 0 · Answer 1 · edited Jul 16 '13 at 20:16

0

You need to deserialize to get back stream array.

For e.g. following code snippet you can pass serializable as ObjectInputStream.

ObjectInputStream ois = new ObjectInputStream(is);
return (String[][]) ois.readObject();

edited Jul 16 '13 at 20:16

Ry-

218,210
55
464
476

answered Jul 16 '13 at 17:48

Sachin Thapa

3,559
4
24
42

Thanks Minitech for useful changes :) – Sachin Thapa Jul 17 '13 at 13:33

ClassCastException: java.lang.Object[] cannot be cast to java.lang.String[][]

1 Answers1