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
– Ravi, Commented Nov 2, 2016 at 4:26
You should use the debugger to ensure that the value inside of userid can actually be converted into an Integer. — cascal
– cascal, Commented Nov 2, 2016 at 4:28
Possible duplicate of Converting a string to an integer on Android — Mithun Sarker
– Mithun Sarker, Commented Nov 2, 2016 at 4:48

Chirag Parmar · Accepted Answer · 2016-11-02 04:35:08Z

2

EDIT:

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

edited Nov 2, 2016 at 4:35

Chirag Parmar

84111 silver badges26 bronze badges

answered Nov 2, 2016 at 4:30

Sasi Kumar

13.5k3 gold badges31 silver badges54 bronze badges

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1 Comment

LoveAndroid Over a year ago

please try the sasikumar code ! your problem has been solved.

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