How to convert string to integer in android?

Question

i want to convert userid(string) to integer but app get to crashed why? if i removes converted method then no crashed but i want integer value what i do?

  public void onCreate() {
    // TODO Auto-generated method stub
    super.onCreate();
    handler = new Handler();
  }
  @Override
  protected void onHandleIntent(Intent intent) {
        Bundle extras = intent.getExtras();
       /**
        * Get stored session data userid from other class
        **/
        userid = "";
        session = new SessionManager(getApplicationContext());//<-- this 
        HashMap<String, String> user = session.getUserDetails();
        userid = user.get(SessionManager.KEY_userid);

        /*i want convert userid to int, when i try to 
          convert then app is carashed. pls help me what i am missing here*/

        Integer U_ID = Integer.valueOf(userid);
        if(U_ID >0){
            Toast.makeText(GcmMessageHandler.this, "new on id="+userid, Toast.LENGTH_LONG).show();
        }

if i removes convert function then app not crashed, but i want integer valued what i do?

use `Integer.parseInt(userid)` instead of `Integer.valueOf(userid);`. If `userid` is blank, it will not work — Ravi, Nov 02 '16 at 04:26
You should use the debugger to ensure that the value inside of `userid` can actually be converted into an `Integer`. — cascal, Nov 02 '16 at 04:28
Possible duplicate of [Converting a string to an integer on Android](http://stackoverflow.com/questions/2709253/converting-a-string-to-an-integer-on-android) — Mithun Sarker Shuvro, Nov 02 '16 at 04:48

score 2 · Accepted Answer · edited Nov 02 '16 at 04:35

2

EDIT:

if(userid != null && !userid.trim().isEmpty()){
     int  U_ID = Integer.parseInt(userid)
}

edited Nov 02 '16 at 04:35

Chirag Parmar

833
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answered Nov 02 '16 at 04:30

sasikumar

12,540
3
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48

please try the sasikumar code ! your problem has been solved. – LoveAndroid Nov 02 '16 at 04:38

How to convert string to integer in android?

1 Answers1