android - Trying to implement swipe movement -

public class coursesactivity extends sherlockfragmentactivity {

arraylist<coursedata> mcourseslist = new arraylist<coursedata>();  public courseslistadapter courseslistadapter; public listview mlist; public alertdialog.builder dlgalert; public dialog logindialog; public dialog logindialogoverflow;  linearlayout progressbar; static sqlitewebcourse dbhelper; private gesturedetectorcompat mdetector;  public final static string extra_message = "com.technion.coolie.webcourse.message";  public coursesactivity() {     dbhelper = new sqlitewebcourse(this, "webcouredb", null, 1); }  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      // create list of courses     mcourseslist = new arraylist<coursedata>();     setcontentview(r.layout.web_activity_courses);     mlist = (listview) findviewbyid(r.id.courses_list);     dlgalert = new alertdialog.builder(getapplicationcontext());     if (!coolieaccount.webcourse.isalreadyloggedin()) {          logindialog = coolieaccount.webcourse.opensignindialog(this);          ondismisslistener dismisslistener = new ondismisslistener() {              @override             public void ondismiss(dialoginterface dialog) {                  // check if connection success                 if (coolieaccount.webcourse.isalreadyloggedin()) {                     // connection success                      progressbar = (linearlayout) findviewbyid(r.id.progressbarlayout_courses);                     progressbar.setvisibility(view.visible);                      asyncparse<coursedata> = new asyncparse<coursedata>() {                          @override                         protected list<coursedata> doinbackground(                                 string... params) {                             // todo auto-generated method stub                             try {                                 courselist crl = new courselist(                                         getapplicationcontext());                                 crl.getcourses(coolieaccount.webcourse                                         .getusername(),                                         coolieaccount.webcourse                                                 .getpassword());                                 mcourseslist = dbhelper                                         .getallcourses(coolieaccount.webcourse                                                 .getusername());                             } catch (ioexception e) {                                 // todo auto-generated catch block                                 e.printstacktrace();                             }                             return super.doinbackground(params);                         }                          @override                         protected void onpostexecute(list<coursedata> result) {                             // todo auto-generated method stub                             courseslistadapter courseslistadapter = new courseslistadapter(                                     getapplicationcontext(), mcourseslist);                             mlist.setadapter(courseslistadapter);                             mlist.setbackgroundcolor(0xfff0f0f0);                             progressbar.setvisibility(view.invisible);                             super.onpostexecute(result);                         }                      };                     a.execute("");                  } else {                     // connection failed                     log.v("dbass", "second time");                  }             }         };          logindialog.setondismisslistener(dismisslistener);      } else {         mcourseslist = dbhelper.getallcourses(coolieaccount.webcourse                 .getusername());         courseslistadapter courseslistadapter = new courseslistadapter(                 getapplicationcontext(), mcourseslist);         mlist.setadapter(courseslistadapter);         mlist.setbackgroundcolor(0xfff0f0f0);     }     log.v("gestures", "ontouchevent@!$#%@#%^&^$%");      // onitemclicklistener itemclicked = new onitemclicklistener() {     //     // @override     // public void onitemclick(adapterview<?> list, view view,     // int position, long id) {     // // todo auto-generated method stub     // loadcourseinformationactivity(((coursedata) mlist     // .getitematposition(position)).coursedescription);     // }     // };     // mlist.setonitemclicklistener(itemclicked);     mdetector = new gesturedetectorcompat(this, new mygesturelistener()); }    @override public boolean ontouchevent(motionevent event) {     log.v("gestures", "ontouchevent@!$#%@#%^&^$%");      this.mdetector.ontouchevent(event);     // sure call superclass implementation     return super.ontouchevent(event); }  class mygesturelistener extends gesturedetector.simpleongesturelistener {     private static final string debug_tag = "gestures";      @override     public boolean onfling(motionevent event1, motionevent event2,             float velocityx, float velocityy) {         log.v(debug_tag,                 "onfling: " + event1.tostring() + event2.tostring());         toast.maketext(getapplicationcontext(), "swiped", toast.length_long)                 .show();         if (event2.getx() - event1.getx() > swipe_min_distance                 && math.abs(velocityx) > swipe_threshold_velocity)             toast.maketext(getapplicationcontext(), "swiped",                     toast.length_long).show();         // if (showdeletebutton(e1))         // return true;         return super.onfling(event1, event2, velocityx, velocityy);     } } 

}

hey fellas, i'm trying implement swipe detection went through android lesson , did written there: http://developer.android.com/training/gestures/detector.html reason when touch screen doesnt go ontouchevent. seems problem?

you haven't set touch listener listview.

listview.setontouchlistener(this);