Android How to call newInstance Constructor -

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i want display slideshow using viewpager imageview , textview. when called fragment.newinstance(int image,string value) constructor shows error below.

did called constructor correctly or not?

error:

06-09 15:26:17.746: e/androidruntime(14955): fatal exception: main 06-09 15:26:17.746: e/androidruntime(14955): process: com.example.launchactivity, pid: 14955 06-09 15:26:17.746: e/androidruntime(14955): java.lang.nullpointerexception 06-09 15:26:17.746: e/androidruntime(14955):    @ com.example.launchactivity.launchsliderfragment.newinstance(launchsliderfragment.java:33) 06-09 15:26:17.746: e/androidruntime(14955):    @ com.example.launchactivity.launchactivity$screenslidepageradapter.getitem(launchactivity.java:44) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.support.v4.app.fragmentstatepageradapter.instantiateitem(fragmentstatepageradapter.java:105) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.support.v4.view.viewpager.addnewitem(viewpager.java:832) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.support.v4.view.viewpager.populate(viewpager.java:982) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.support.v4.view.viewpager.populate(viewpager.java:914) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.support.v4.view.viewpager.onmeasure(viewpager.java:1436) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.view.measure(view.java:17495) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.widget.linearlayout.measurevertical(linearlayout.java:847) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.widget.linearlayout.onmeasure(linearlayout.java:588) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.view.measure(view.java:17495) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5363) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.widget.framelayout.onmeasure(framelayout.java:310) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.view.measure(view.java:17495) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5363) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.widget.framelayout.onmeasure(framelayout.java:310) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.view.measure(view.java:17495) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5363) 06-09 15:26:17.746: e/androidruntime(14955):    @ com.android.internal.widget.actionbaroverlaylayout.onmeasure(actionbaroverlaylayout.java:412) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.view.measure(view.java:17495) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5363) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.widget.framelayout.onmeasure(framelayout.java:310) 06-09 15:26:17.746: e/androidruntime(14955):    @ com.android.internal.policy.impl.phonewindow$decorview.onmeasure(phonewindow.java:2548) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.view.measure(view.java:17495) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.viewrootimpl.performmeasure(viewrootimpl.java:2285) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.viewrootimpl.measurehierarchy(viewrootimpl.java:1396) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.viewrootimpl.performtraversals(viewrootimpl.java:1595) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.viewrootimpl.dotraversal(viewrootimpl.java:1254) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.viewrootimpl$traversalrunnable.run(viewrootimpl.java:6637) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.choreographer$callbackrecord.run(choreographer.java:814) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.choreographer.docallbacks(choreographer.java:614) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.choreographer.doframe(choreographer.java:584) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.view.choreographer$framedisplayeventreceiver.run(choreographer.java:800) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.os.handler.handlecallback(handler.java:733) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.os.handler.dispatchmessage(handler.java:95) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.os.looper.loop(looper.java:146) 06-09 15:26:17.746: e/androidruntime(14955):    @ android.app.activitythread.main(activitythread.java:5602) 06-09 15:26:17.746: e/androidruntime(14955):    @ java.lang.reflect.method.invokenative(native method) 06-09 15:26:17.746: e/androidruntime(14955):    @ java.lang.reflect.method.invoke(method.java:515) 06-09 15:26:17.746: e/androidruntime(14955):    @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:1283) 06-09 15:26:17.746: e/androidruntime(14955):    @ com.android.internal.os.zygoteinit.main(zygoteinit.java:1099) 06-09 15:26:17.746: e/androidruntime(14955):    @ dalvik.system.nativestart.main(native method)

activity:

public class launchactivity extends fragmentactivity {     private static final int num_pages = 4;     private viewpager mpager;     private pageradapter mpageradapter;     string[] text={"property showcase","bill payment","golf virtual tour","news , events"};     int[] image={r.drawable.slide1,r.drawable.slide2,r.drawable.slide3,r.drawable.slide4};     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_launch);         mpager = (viewpager) findviewbyid(r.id.pager);         mpageradapter = new screenslidepageradapter(getsupportfragmentmanager());         mpager.setadapter(mpageradapter);     }       @override     public boolean oncreateoptionsmenu(menu menu) {         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.launch, menu);         return true;     }      private class screenslidepageradapter extends fragmentstatepageradapter {         public screenslidepageradapter(fragmentmanager fm) {             super(fm);           }          @override         public fragment getitem(int position) {              new launchsliderfragment();             return launchsliderfragment.newinstance(image[position], text[position]);         }          @override         public int getcount() {             return num_pages;         }     }  }

fragment:

public class launchsliderfragment extends fragment {     private imageview imageview;     private textview textview;      @override     public view oncreateview(layoutinflater inflater, viewgroup container,             bundle savedinstancestate) {         // todo auto-generated method stub          view view = inflater.inflate(r.layout.launch_slider_fragment, null);         imageview = (imageview) view.findviewbyid(r.id.launch_sliderimage);         textview = (textview) view.findviewbyid(r.id.launch_slidertext);          return view;     }      public static launchsliderfragment newinstance(int imageid, string string) {         launchsliderfragment launchsliderfragment = new launchsliderfragment();         bundle args = new bundle();         args.putint("image", imageid);         args.putstring("text", string);         launchsliderfragment.setarguments(args);         launchsliderfragment.imageview.setimageresource(imageid);         launchsliderfragment.textview.settext(string);         return launchsliderfragment;      }      public launchsliderfragment() {         // todo auto-generated constructor stub     }  }


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