android - How to sync my app with photos -

i build custom gallery photos only. taking photos sdcard class:

public class photos { public static final string photo_bucket_name =     environment.getexternalstoragestate().tostring() + "/dcim/camera"; public static final int photo_bucket_id = getbucketid(photo_bucket_name);  public static int getbucketid(string path) {     return path.tolowercase().hashcode(); }  public static list<string> getphotos(context context) {     final string[] projection = {mediastore.images.media.data};     final string selection = mediastore.images.media.bucket_id;     cursor c = context.getcontentresolver().query(images.media.external_content_uri, projection, selection, null, null);     list<string> result = new arraylist<string>(c.getcount());     if (c.movetofirst()) {         int datacolumn = c.getcolumnindexorthrow(mediastore.images.media.data);         {             string data = c.getstring(datacolumn);             result.add(data);         } while (c.movetonext());     }     c.close();     return result; } 

and set adapter gallery:

public class imageadapter extends baseadapter {     int galitembg;     private context mcontext;     private list<string> photolist;      public imageadapter(context c) {         mcontext = c;         photolist = photos.getphotos(c);         typedarray typarray = obtainstyledattributes(r.styleable.gallerytheme);         galitembg = typarray.getresourceid(r.styleable.gallerytheme_android_galleryitembackground, 0);         typarray.recycle();     }      @override     public int getcount() {         return photolist.size();     }      @override     public object getitem(int position) {         return position;     }       @override     public long getitemid(int position) {         return position;     }      @override     public view getview(int position, view convertview, viewgroup parent) {         imageview = new imageview(mcontext);          bitmap bm = bitmapfactory.decodefile(photolist.get(position));         i.setimagebitmap(bm);         i.setlayoutparams(new gallery.layoutparams(80,70));         i.setscaletype(imageview.scaletype.fit_xy);         i.setbackgroundresource(galitembg);          return i;     } } 

} there nothing special. when run app, works. after launch camera , taking photos, in time app running in background. when app, need see new photos. how it?

tried: update adapter in onresume method this:

gallery g;  public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.main);     g = (gallery) findviewbyid(r.id.gallery);     g.setadapter(new imageadapter(this)); }  @override public void onresume() {     g.setadapter(new imageadapter(this)); } 

app crashing. may wrong?

logcat:

02-09 08:12:33.719: error/androidruntime(276): uncaught handler: thread main exiting due uncaught exception 02-09 08:12:34.129: error/androidruntime(276): java.lang.runtimeexception: unable resume activity {ru.home.tabexample/ru.home.tabexample.tabact}: java.lang.runtimeexception: unable resume activity {ru.home.tabexample/ru.home.tabexample.firsttab}: android.app.supernotcalledexception: activity {ru.home.tabexample/ru.home.tabexample.firsttab} did not call through super.onresume() 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activitythread.performresumeactivity(activitythread.java:2950) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activitythread.handleresumeactivity(activitythread.java:2965) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activitythread.handlelaunchactivity(activitythread.java:2516) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activitythread.access$2200(activitythread.java:119) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activitythread$h.handlemessage(activitythread.java:1863) 02-09 08:12:34.129: error/androidruntime(276):     @ android.os.handler.dispatchmessage(handler.java:99) 02-09 08:12:34.129: error/androidruntime(276):     @ android.os.looper.loop(looper.java:123) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activitythread.main(activitythread.java:4363) 02-09 08:12:34.129: error/androidruntime(276):     @ java.lang.reflect.method.invokenative(native method) 02-09 08:12:34.129: error/androidruntime(276):     @ java.lang.reflect.method.invoke(method.java:521) 02-09 08:12:34.129: error/androidruntime(276):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:860) 02-09 08:12:34.129: error/androidruntime(276):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:618) 02-09 08:12:34.129: error/androidruntime(276):     @ dalvik.system.nativestart.main(native method) 02-09 08:12:34.129: error/androidruntime(276): caused by: java.lang.runtimeexception: unable resume activity {ru.home.tabexample/ru.home.tabexample.firsttab}: android.app.supernotcalledexception: activity {ru.home.tabexample/ru.home.tabexample.firsttab} did not call through super.onresume() 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activitythread.performresumeactivity(activitythread.java:2950) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.localactivitymanager.movetostate(localactivitymanager.java:170) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.localactivitymanager.dispatchresume(localactivitymanager.java:518) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activitygroup.onresume(activitygroup.java:58) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.instrumentation.callactivityonresume(instrumentation.java:1149) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activity.performresume(activity.java:3763) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activitythread.performresumeactivity(activitythread.java:2937) 02-09 08:12:34.129: error/androidruntime(276):     ... 12 more 02-09 08:12:34.129: error/androidruntime(276): caused by: android.app.supernotcalledexception: activity {ru.home.tabexample/ru.home.tabexample.firsttab} did not call through super.onresume() 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activity.performresume(activity.java:3765) 02-09 08:12:34.129: error/androidruntime(276):     @ android.app.activitythread.performresumeactivity(activitythread.java:2937) 02-09 08:12:34.129: error/androidruntime(276):     ... 18 more 

you have call super.onresume in onresume method.

you can see in message of exception: android.app.supernotcalledexception: activity {ru.home.tabexample/ru.home.tabexample.firsttab} did not call through super.onresume()

the activity base class uses onresume methods reinitialise stuff. if implement in class leave out super.onresume() call initializations in base class can not made.