c# - ViewPager/PagerAdapter shows all views on first page -

what's happening
viewpager in app shows views instantiated on page one. if instantiate 2 views example, both views shown in page one, , second page blank.

images showing problem
can see below, page 1 contains both pages , page 2 empty.

i can't figure out why happening. have been struggling long time now. tried not add view adapter, adding view , providing index, not inflating creating imageview in adapter, etc.

what missing? appreciated!

code
activity

[activity(label = "foto's", screenorientation = screenorientation.portrait)] public class picturesactivity : baseactivity {     private imagepageradapter _imageadapter;     private list<string> _filepaths;     private viewpager _viewpager;      private const int _maxpictures = 5;      protected override void oncreate(bundle bundle)     {         base.oncreate(bundle);         setcontentview(resource.layout.pictures);         _viewpager = findviewbyid<viewpager>(resource.id.viewpager);     }      protected override void onstart()     {         base.onstart();          _imageadapter = new imagepageradapter(this, _filepaths);         _viewpager.adapter = _imageadapter;         _viewpager.setcurrentitem(0, false);     } } 

pageradapter

internal class imagepageradapter : pageradapter {     activity _activity;     list<string> _filepaths;      public imagepageradapter(activity activity, list<string> filepaths)     {         _activity = activity;         _filepaths = filepaths;     }      public override java.lang.object instantiateitem(viewgroup container, int position)     {         var view = _activity.layoutinflater.inflate(resource.layout.picturepageitem, container, false);         var imageview = view.findviewbyid<imageview>(resource.id.imageview);         var filepath = _filepaths[position];          displaymetrics metrics = _activity.resources.displaymetrics;         using (var bitmap = bitmaphelper.getresizedbitmap(filepath, new size(metrics.widthpixels, metrics.heightpixels)))             imageview.setimagebitmap(bitmap);          container.javacast<viewpager>().addview(view);         return view;     }      public override void destroyitem(viewgroup container, int position, java.lang.object @object)     {         var view = (linearlayout)@object;         var imageview = view.findviewbyid<imageview>(resource.id.imageview);          if (imageview != null && imageview.drawable != null)         {             imageview.drawable.dispose();             imageview.setimagebitmap(null);         }          container.javacast<viewpager>().removeview(view);     }      public override int count     {         { return _filepaths.count; }     }      public override bool isviewfromobject(view view, java.lang.object @object)     {         return view linearlayout;     } } 

pictures layout

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="match_parent"     android:layout_height="match_parent">     <android.support.v4.view.viewpager         android:id="@+id/viewpager"         android:layout_width="match_parent"         android:layout_height="match_parent" /> </linearlayout> 

picturepageitem layout (adapter page layout)

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="match_parent"     android:layout_height="match_parent">     <imageview         android:id="@+id/imageview"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:scaletype="centerinside" /> </linearlayout> 

i think problem may due method isviewfromobject().

this method called compare view key object. version returning true viewpager thinks views on same page.

you should modify code this:

public override bool isviewfromobject(view view, java.lang.object @object) {     return (object)view == @object; } 

for more details, see:

http://developer.android.com/reference/android/support/v4/view/pageradapter.html