Unsupportedoperationexception While Calling Volley Request With Headers

I try to make call request with Volley library. I want to set headers, but I'm getting java.lang.UnsupportedOperationException. Do you know why , and how can I solve this problem ?

Solution 1:

Remove these two lines:

Map<String,String> params = super.getHeaders();
            if(params==null)params = newHashMap<>();

And add just this:

Map<String, String> params = newHashMap<>();

It should work now.

Solution 2:

Use the below method to solve UnsupportedOperationException:

overridefungetHeaders(): MutableMap<String, String> {
    val header = HashMap<String, String>()
//  header[Constants.AUTH_TOKEN] = Constants.TOKEN_IDreturn header
}

This is working for me.