AsyncTask error from getView using a HashMap - Android -

i have set allow me change visibility of textview on online file turned strings , of works fine apart when add in parts of code allows me change visibility of textview. not understand why isn't working. here logcat:

07-21 19:00:46.451  21334-21334/com.example.app e/androidruntime: fatal exception: main     java.lang.nullpointerexception     @ com.example.app.lazyadapter.getview(lazyadapter.java:68)     @ android.widget.abslistview.obtainview(abslistview.java:2035)     @ android.widget.listview.measureheightofchildren(listview.java:1244)     @ android.widget.listview.onmeasure(listview.java:1155)     @ android.view.view.measure(view.java:12723)     @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:4698)     @ android.widget.linearlayout.measurechildbeforelayout(linearlayout.java:1369)     @ android.widget.linearlayout.measurevertical(linearlayout.java:660)     @ android.widget.linearlayout.onmeasure(linearlayout.java:553)     @ android.view.view.measure(view.java:12723)     @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:4698)     @ android.widget.framelayout.onmeasure(framelayout.java:293)     @ android.view.view.measure(view.java:12723)     @ android.support.v4.view.viewpager.onmeasure(viewpager.java:1447)     @ android.view.view.measure(view.java:12723)     @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:4698)     @ android.widget.framelayout.onmeasure(framelayout.java:293)     @ android.view.view.measure(view.java:12723)     @ android.widget.linearlayout.measurevertical(linearlayout.java:812)     @ android.widget.linearlayout.onmeasure(linearlayout.java:553)     @ android.view.view.measure(view.java:12723)     @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:4698)     @ android.widget.framelayout.onmeasure(framelayout.java:293)     @ com.android.internal.policy.impl.phonewindow$decorview.onmeasure(phonewindow.java:2092)     @ android.view.view.measure(view.java:12723)     @ android.view.viewrootimpl.performtraversals(viewrootimpl.java:1064)     @ android.view.viewrootimpl.handlemessage(viewrootimpl.java:2442)     @ android.os.handler.dispatchmessage(handler.java:99)     @ android.os.looper.loop(looper.java:137)     @ android.app.activitythread.main(activitythread.java:4575)     @ java.lang.reflect.method.invokenative(native method)     @ java.lang.reflect.method.invoke(method.java:511)     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:789)     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:556)     @ dalvik.system.nativestart.main(native method) 

here code of adapter error coming from:

public class lazyadapter extends baseadapter {      private activity activity;     private arraylist<hashmap<string, string>> data;     private static layoutinflater inflater=null;     public imageloader imageloader;       public lazyadapter(activity a, arraylist<hashmap<string, string>> d) {         activity = a;         data=d;         inflater = (layoutinflater)activity.getsystemservice(context.layout_inflater_service);     imageloader=new imageloader(activity.getapplicationcontext());     }      public int getcount() {         return data.size();     }      public object getitem(int position) {         return position;     }      public long getitemid(int position) {         return position;     }  public view getview(int position, view convertview, viewgroup parent) {     view vi=convertview;     if(convertview==null)         vi = inflater.inflate(r.layout.list_row, null);      textview title = (textview)vi.findviewbyid(r.id.title); // title     textview date1 = (textview)vi.findviewbyid(r.id.date1); // release date 1 (usually us)     textview date2 = (textview)vi.findviewbyid(r.id.date2); // release date 2 (usually europe)     textview date3 = (textview)vi.findviewbyid(r.id.date3); // release date 3 (usually australia)     textview platforms = (textview)vi.findviewbyid(r.id.platforms); // duration     imageview thumb_image=(imageview)vi.findviewbyid(r.id.list_image); // thumb image      hashmap<string, string> song = new hashmap<string, string>();     song = data.get(position);      //this allows visibility of textviews set via string set online xml     map<string, integer> map = new hashmap<string, integer>();     map.put("visible", view.visible);     map.put("gone", view.gone);     map.put("invisible", view.invisible);      // setting values in listview     title.settext(song.get(customizedlistview.key_title));     date1.settext(song.get(customizedlistview.key_date1));     date2.settext(song.get(customizedlistview.key_date2));     date3.settext(song.get(customizedlistview.key_date3));     date2.setvisibility(map.get(song.get(customizedlistview.key_date2vis))); //this sets visibility via key_date2vis string using 1 of terms in hashmap above     date3.setvisibility(map.get(song.get(customizedlistview.key_date3vis)));     platforms.settext(song.get(customizedlistview.key_platforms));     imageloader.displayimage(song.get(customizedlistview.key_thumb_url), thumb_image);     return vi;     } } 

line 68 of lazyadapter.class is:

date2.setvisibility(map.get(song.get(customizedlistview.key_date2vis))); 

if me fix problem happy. reading. if need other files don't hesitate ask.

fix: messed string names incredibly stupid error.

at line 68, map not null, think song may null after data (at index position).

just add logging code debug issue:

hashmap<string, string> song = new hashmap<string, string>(); song = data.get(position);  log.i("test", "index is: " + position); log.i("test", "song: " + song); 

then turn logcat, may find problem.

if not, comment here output.

update1

the map , song not null. value may null:

map.get(song.get(customizedlistview.key_date2vis)); 

update2

you can assign default value if null:

int visibility = map.get(song.get(customizedlistview.key_date2vis)); if (null == visibility)     visibility = view.visible; 

you can add logging find out problem is:

log.i("test", "song :" + song); log.i("test", song.get(customizedlistview.key_date2vis));