java - Image with caption Android Viewpager -

i new android programming.i have gallery images , when click on 1 image should appear viewpager full screen image , caption , can slide through whole gallery. have follow tutorial enter link description here difference images stored in array well, caption. when run app gallery showing viewpager empty , not sliding. have no errors, have no idea should wrong. in advance :)

fullscreenimageadapter.java

package com.example.sherlockholmes.images;  import android.app.activity; import android.content.context; import android.support.v4.view.pageradapter; import android.support.v4.view.viewpager; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.button; import android.widget.imageview; import android.widget.relativelayout; import android.widget.textview;  import com.example.sherlockholmes.r;  public class fullscreenimageadapter extends pageradapter {      private activity context;     private layoutinflater inflater;     private int _position;     private integer[] mthumbids;     private string[] description;      public fullscreenimageadapter(activity context,integer[] mthumbids,string[] description){         this.context=context;         this.mthumbids =  mthumbids;         this.description = description;     }       @override     public int getcount() {         return 0;     }       @override     public boolean isviewfromobject(view view, object object) {         return view == ((relativelayout) object);     }      @override     public object instantiateitem(viewgroup container, int position) {           inflater = (layoutinflater)context.getsystemservice(context.layout_inflater_service);         view viewlayout = inflater.inflate(r.layout.layout_fullscreen_image, container,                 false);          imageview imageview = (imageview) viewlayout.findviewbyid(r.id.full_image);         textview textview = (textview) viewlayout.findviewbyid(r.id.item_text);         button btnclose = (button) viewlayout.findviewbyid(r.id.btnclose);         imageview.setimageresource(mthumbids[_position]);         textview.settext(description[_position]);          btnclose.setonclicklistener(new view.onclicklistener() {                         @override             public void onclick(view v) {                 context.finish();             }         });           ((viewpager) container).addview(viewlayout,0);          return viewlayout;     }      @override     public void destroyitem(viewgroup container, int position, object object) {         ((viewpager) container).removeview((relativelayout) object);      }  } 

fullscreenviewactivity.java

package com.example.sherlockholmes.images;  import android.app.activity; import android.content.intent; import android.os.bundle; import android.support.v4.view.viewpager;  import com.example.sherlockholmes.r;  public class fullscreenviewactivity extends activity{       private fullscreenimageadapter adapter;     private viewpager viewpager;       private integer[] mthumbids = {                 r.drawable.acd1, r.drawable.acd1,                r.drawable.acd1, r.drawable.acd1,                r.drawable.acd1, r.drawable.acd1,                r.drawable.acd1, r.drawable.acd1,         };          private string[] description={                 "apple","pinaple","rose","strawberry",                 "orange","lemon","potato","banana"         };      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_fullscreen_view);          viewpager = (viewpager) findviewbyid(r.id.pager);           intent = getintent();         int position = i.getintextra("position", 0);          adapter = new fullscreenimageadapter(fullscreenviewactivity.this,mthumbids,description);          viewpager.setadapter(adapter);          // displaying selected image first         viewpager.setcurrentitem(position);     } } 

try

 @override public int getcount() {     return mthumbids.length; } 

instead of

 @override public int getcount() {     return 0; } 

in fullscreenimageadapter

and change this

 @override public void destroyitem(viewgroup container, int position, object object) {     ((viewpager) container).removeview((relativelayout) object);  } 

with

 @override public void destroyitem(viewgroup container, int position, object object) {     ((viewpager) container).removeview((view) object); } 

and change this

@override public boolean isviewfromobject(view view, object object) {     return view == ((relativelayout) object); } 

with

@override public boolean isviewfromobject(view view, object object) {     return view == ((view) object); } 

update: need change

  imageview.setimageresource(mthumbids[_position]);   textview.settext(description[_position]); 

with

  imageview.setimageresource(mthumbids[position]);    textview.settext(description[position]); 

in fullscreenimageadapter.it's becoz have not initialized _position , that's why view pager fetch image , caption array @ position 0.