Question

I am making an app in which i am stuck in this exception – String index out of bound and i get error at the following line.

String netwrkk = mTelephonyMgr.getNetworkOperator();
 System.out.println("hello");
 if (netwrkk != null) {
     System.out.println("hello2");
      //  int mcc = Integer.parseInt(netwrkk.substring(0, 3)); // exception at this line

     System.out.println("hello3");
        int mnc = Integer.parseInt(netwrkk.substring(3));// exception at this line
        System.out.println("hello4");
     mccc1=(TextView)findViewById(R.id.mccc1);
     System.out.println("netwrk:"+netwrkk);
     mccc1.setText(Integer.toString(mcc));
     mncc1=(TextView)findViewById(R.id.mncc1);
     System.out.println("netwrk:"+netwrkk);
     mncc1.setText(Integer.toString(mnc));
     System.out.println("mccc: "+mcc);
     try{
     System.out.println("bearing : "+locn.getBearing());
     }catch (Exception e) {
        System.out.println(e);
    }System.out.println("mnc"+mnc);
                        }

Answer 1

You should check if netwrkk has the length of 4 or more. If not, the substring(0, 3) will fail.

Also make yourself familiar with the Log class in android. You shouldn’t use System.out.println()