java - Change Tablayout image from Viewpager Swipe -

/* hello read im trying simple. im creating slide show. have view pager tablayout. tablayout going used indicator viewpager. problem setting background drawable selected tab within view pager. tried tab layout position , set background drawable thats not working well. posted code if need anymore information let me know. */

 public class tutoralactivity extends appcompatactivity {         private viewpager viewpager;         private pageradapter pageradapter;         private tablayout tablayout;          @override         protected void oncreate(bundle savedinstancestate) {             super.oncreate(savedinstancestate);             setcontentview(r.layout.activity_tutoral);              int images[] = {                     r.drawable.t1,                     r.drawable.t2,                     r.drawable.t3,                     r.drawable.t4             };              viewpager = (viewpager) findviewbyid(r.id.imageviewpager);             tablayout = (tablayout) findviewbyid(r.id.tutorial_dot_indicator);              mycustomadapter customadapter = new mycustomadapter(tutoralactivity.this, images);             viewpager.setadapter(customadapter);             viewpager.addonpagechangelistener(new viewpager.onpagechangelistener() {                 @override                 public void onpagescrolled(int position, float positionoffset, int positionoffsetpixels) {                   }                  @override                 public void onpageselected(int position) {                   tablayout.gettabat(position).seticon(mydrawableimage);                 }                  @override                 public void onpagescrollstatechanged(int state) {                  }             });              tablayout.setupwithviewpager(viewpager);           }          private class mycustomadapter extends pageradapter {             context context;             int images[];             layoutinflater layoutinflater;              public mycustomadapter(context context, int[] images) {                 this.context = context;                 this.images = images;                 layoutinflater = (layoutinflater) context.getsystemservice(context.layout_inflater_service);             }              @override             public void destroyitem(viewgroup container, int position, object object) {     //            super.destroyitem(container, position, object);                 container.removeview((view) object);             }              @override             public object instantiateitem(viewgroup container, int position) {                 view imageviewlayout = layoutinflater.inflate(r.layout.tutorial_layout, container, false);                  imageview imagetoshow = (imageview) imageviewlayout.findviewbyid(r.id.tutorial_image);                 imagetoshow.setimageresource(images[position]);                  button btndone = (button) imageviewlayout.findviewbyid(r.id.btnimagedone);                 btndone.setvisibility(view.invisible);                   container.addview(imageviewlayout);                  return imageviewlayout;             }              @override             public int getcount() {                 return images.length;             }              @override             public boolean isviewfromobject(view view, object object) {                 return view == ((linearlayout) object);             }         }     } 

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