public int Cal(String ab) {

    String[] arr=ab.split(":");
    int av=(Integer.parseInt(arr[0])*60 +  Integer.parseInt(arr[1]))*1000;



    return av;
}

String[] st =  {"00:49 ","00:49","02:17","03:26","03:55", "04:26", "05:25" };



                Random random = new Random();
                String index = st[random.nextInt(st.length)];
                Log.e("randommmmmmmmmmmm", String.valueOf(Cal(index)));

public int Cal(String ab)
{
    String[] arr=ab.split(":");
    int av = ( Integer.parseInt(arr[0].trim())*60 +  Integer.parseInt(arr[1].trim()))*1000;
    return av;
}

String[] arr=ab.split(":");
 Integer.parseInt(arr[1])  --------->>> This Leads to NumberFormatException

int av=(Integer.parseInt(arr[0].trim())*60 +  Integer.parseInt(arr[1]).trim())*1000;

public int Cal(String ab) {

    String[] arr=ab.split(":");
    int av=(Integer.parseInt(Integer.parseInt(arr[0]))*60 +  Integer.parseInt(arr[1]))*1000;



    return av;
}