android - Contact Picker in PreferenceFragment (failure delivering result error) -

i'm using preferencefragment settings page have 1 preference onclick open contact choose , return result. however, has failure delivering result error.

this preferencefragment class

public class settingsxml extends preferencefragment {  private sharedpreferences sharedprefs; final static int pick_contact = 99;  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      // set background drawable     addpreferencesfromresource(r.xml.settings);      // custom contact pref     preference customcontact = (preference)findpreference("prefpick");     customcontact.setonpreferenceclicklistener(new onpreferenceclicklistener() {          @override         public boolean onpreferenceclick(preference preference) {             intent = new intent(intent.action_pick, contactscontract.contacts.content_uri);             startactivityforresult(i, pick_contact);             return true;         }     });  }  @override public void onactivityresult(int requestcode, int resultcode, intent data) {         switch (requestcode) {         case pick_contact:                 if (resultcode == activity.result_ok) {                     if (data != null) {                         uri contactdata = data.getdata();                         // contactdata returns value                         log.i(tag, "" + contactdata);                         string[] projection = {phone.number};                         // wrong @ cursor?                         cursor cursor = ctx.getcontentresolver()                                 .query(contactdata, projection, null, null, null);                         cursor.movetofirst();                          // retrieve phone number number column                         int column = cursor.getcolumnindex(phone.number);                         string number = cursor.getstring(column);                          log.i(tag, "" + number);                     }                 } else {                        //                 }                 return;         }         super.onactivityresult(requestcode, resultcode, data); } 

}

and logcat.

05-02 17:36:27.496: w/dalvikvm(6142): threadid=1: thread exiting uncaught exception (group=0xb4e3b908) 05-02 17:36:27.906: d/dalvikvm(6142): gc_concurrent freed 356k, 10% free 4398k/4864k, paused 12ms+64ms, total 146ms 05-02 17:36:30.607: e/androidruntime(6142): fatal exception: main 05-02 17:36:30.607: e/androidruntime(6142): java.lang.runtimeexception: failure delivering result resultinfo{who=android:fragment:0, request=99, result=-1, data=intent { dat=content://com.android.contacts/contacts/lookup/1906i7ef0c7d80ffe6bca/2 flg=0x1 }} activity {settingsfragment}: java.lang.nullpointerexception 05-02 17:36:30.607: e/androidruntime(6142):     @ android.app.activitythread.deliverresults(activitythread.java:3319) 05-02 17:36:30.607: e/androidruntime(6142):     @ android.app.activitythread.handlesendresult(activitythread.java:3362) 05-02 17:36:30.607: e/androidruntime(6142):     @ android.app.activitythread.access$1100(activitythread.java:141) 05-02 17:36:30.607: e/androidruntime(6142):     @ android.app.activitythread$h.handlemessage(activitythread.java:1282) 05-02 17:36:30.607: e/androidruntime(6142):     @ android.os.handler.dispatchmessage(handler.java:99) 05-02 17:36:30.607: e/androidruntime(6142):     @ android.os.looper.loop(looper.java:137) 05-02 17:36:30.607: e/androidruntime(6142):     @ android.app.activitythread.main(activitythread.java:5039) 05-02 17:36:30.607: e/androidruntime(6142):     @ java.lang.reflect.method.invokenative(native method) 05-02 17:36:30.607: e/androidruntime(6142):     @ java.lang.reflect.method.invoke(method.java:511) 05-02 17:36:30.607: e/androidruntime(6142):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:793) 05-02 17:36:30.607: e/androidruntime(6142):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:560) 05-02 17:36:30.607: e/androidruntime(6142):     @ dalvik.system.nativestart.main(native method) 05-02 17:36:30.607: e/androidruntime(6142): caused by: java.lang.nullpointerexception 05-02 17:36:30.607: e/androidruntime(6142):     @ settingsxml.onactivityresult(settingsxml.java:80) 05-02 17:36:30.607: e/androidruntime(6142):     @ android.app.activity.dispatchactivityresult(activity.java:5297) 05-02 17:36:30.607: e/androidruntime(6142):     @ android.app.activitythread.deliverresults(activitythread.java:3315) 05-02 17:36:30.607: e/androidruntime(6142):     ... 11 more 

i have permission set @ manifest.