android scrollview - Play/Pause video when listitem get visible in recyclerview -

i have implemented recyclerview in adding textures views list items play videos url. vine , instagram app want play video when visible in recyclerview , stop/pause video when listitem gets out of screen. following code:

videosadapter class:

public class videosadapter extends recyclerview.adapter<videosadapter.viewholder> {  private static string tag = "videosadapter";  context context; private arraylist<string> urls; recyclerview recyclerview;  public static class viewholder extends recyclerview.viewholder {      public textureview textureview;     public textview textview;      public viewholder(view v) {         super(v);         textureview = (textureview) v.findviewbyid(r.id.textureview);         textview = (textview) v.findviewbyid(r.id.textview);      } }  public videosadapter(context context, recyclerview recyclerview, final arraylist<string> urls) {      this.context = context;     this.recyclerview = recyclerview;     this.urls = urls;      recyclerview.addonscrolllistener(new recyclerview.onscrolllistener() {         @override         public void onscrolled(recyclerview recyclerview, int dx, int dy) {             super.onscrolled(recyclerview, dx, dy);         }          @override         public void onscrollstatechanged(recyclerview recyclerview, int newstate) {             super.onscrollstatechanged(recyclerview, newstate);              if(newstate == recyclerview.scroll_state_idle) {                  linearlayoutmanager layoutmanager = ((linearlayoutmanager) recyclerview.getlayoutmanager());                 int firstvisibleposition = layoutmanager.findfirstvisibleitemposition();                 int findfirstcompletelyvisibleitemposition = layoutmanager.findfirstcompletelyvisibleitemposition();                 int findlastvisibleitemposition = layoutmanager.findlastvisibleitemposition();                 int findlastcompletelyvisibleitemposition = layoutmanager.findlastcompletelyvisibleitemposition();                  *//*log.i(tag, "firstvisibleposition = " + string.valueof(firstvisibleposition));                 log.i(tag, "findfirstcompletelyvisibleitemposition = " + string.valueof(findfirstcompletelyvisibleitemposition));                 log.i(tag, "findlastvisibleitemposition = " + string.valueof(findlastvisibleitemposition));                 log.i(tag, "findlastcompletelyvisibleitemposition = " + string.valueof(findlastcompletelyvisibleitemposition));*//*                  log.i(tag, "//////////////////////////////////////////////////////////////");                  if(findfirstcompletelyvisibleitemposition>=0) {                     log.i(tag, "playing_url = " + urls.get(findfirstcompletelyvisibleitemposition));                     int temppreviousurl = findfirstcompletelyvisibleitemposition - 1;                     if(temppreviousurl>=0)                         log.i(tag, "stop_playing_url = " + urls.get(temppreviousurl));                  }                 else                 {                     log.i(tag, "playing_url = " + urls.get(firstvisibleposition));                     int temppreviousurl = firstvisibleposition - 1;                     if(temppreviousurl>=0)                         log.i(tag, "stop_playing_url = " + urls.get(temppreviousurl));                 }             }         }     }); }  // create new views (invoked layout manager) @override public videosadapter.viewholder oncreateviewholder(viewgroup parent, int viewtype) {     // create new view     view v = layoutinflater.from(parent.getcontext()).inflate(r.layout.view_main, parent, false);     viewholder viewholder = new viewholder(v);     return viewholder; }  // replace contents of view (invoked layout manager) @override public void onbindviewholder(viewholder holder, int position) {      string url = urls.get(position);     holder.textview.settext(url);      //log.i("bindviewholdercalledfor", position + " = " + url);      videoplaycontroller videoplaycontroller = new videoplaycontroller(context, recyclerview, holder.textureview, url);      if(position==0) {         videoplaycontroller.loadvideo();     }  }  @override public int getitemcount() {     return urls.size(); } 

}

videoplaycontroller class:

public class videoplaycontroller implements textureview.surfacetexturelistener {  private static string tag = "videoplaycontroller";  context context; string url; mediaplayer mp; surface surface; surfacetexture s; recyclerview recyclerview; textureview textureview;  public videoplaycontroller(context context, recyclerview recyclerview, textureview textureview, final string url) {      this.context = context;     this.recyclerview = recyclerview;     this.textureview = textureview;     this.url = url;      recyclerview.addonscrolllistener(new recyclerview.onscrolllistener() {          @override         public void onscrollstatechanged(recyclerview recyclerview, int newstate) {             super.onscrollstatechanged(recyclerview, newstate);              if(newstate == recyclerview.scroll_state_idle) {                  log.i(tag, "onscrollstatechangedcalled for: " + url);                  //when scroll @ idol position check if item visible              }         }     });  }  public void loadvideo() {      textureview.setsurfacetexturelistener(this); }  @override public void onsurfacetextureavailable(final surfacetexture surface, int width, int height) {     log.d("surface_available-url", this.url);     startvideo(surface); }  @override public void onsurfacetexturesizechanged(surfacetexture surface, int width, int height) {     log.d("surface_destroyed-url", this.url); }  @override public boolean onsurfacetexturedestroyed(surfacetexture surface) {     log.d("surface_destroyed-url", this.url);     this.mp.stop();     this.mp.reset();     this.mp.release();     this.mp = null;     return false; }  @override public void onsurfacetextureupdated(surfacetexture surface) {  }  public void startvideo(surfacetexture t) {     this.surface = new surface(t);     this.mp = new mediaplayer();     this.mp.setsurface(this.surface);     try {         uri uri = uri.parse(this.url);         this.mp.setdatasource(url);         this.mp.prepareasync();          this.mp.setonpreparedlistener(new mediaplayer.onpreparedlistener() {             public void onprepared(mediaplayer mp) {                  mp.setlooping(true);                 mp.start();              }         });     } catch (illegalargumentexception e1) {         e1.printstacktrace();     } catch (securityexception e1) {         e1.printstacktrace();     } catch (illegalstateexception e1) {         e1.printstacktrace();     } catch (ioexception e1) {         e1.printstacktrace();     }     try {      } catch (illegalargumentexception e) {         e.printstacktrace();     } catch (securityexception e) {         e.printstacktrace();     } catch (illegalstateexception e) {         e.printstacktrace();     }     try {      } catch (illegalstateexception e) {         e.printstacktrace();     } }  public void changeplaystate() {     if(this.mp.isplaying())         this.mp.stop();     else         this.mp.start(); }  public static boolean isviewvisible(view subview, view parentview) {     rect scrollbounds = new rect();     parentview.gethitrect(scrollbounds);     if (subview.getlocalvisiblerect(scrollbounds)) {         return true;     }     return false; } 

}

to achieve thing visible items positions discussed in this thread. dont know how pass visible scroll position videoplaycontroller class , how track , access right object based on scroll position.