android - ImageVIew Thumbnail setVisibility GONE not working inside onPrepared -

i want hide imageview thumbnail after remote video ready play, means when onprepared execute imageview.setvisibility(view.gone) doesn't works @ all.

i have seen answers one, two , think cause surfaceview or videoview. per answers

i have tried using both mediaplayer , videoview

code using mediaplayer , surfaceview

mmediaplayer = new mediaplayer();         holder.surfaceview.setdrawingcacheenabled(true);         try {             mmediaplayer.setaudiostreamtype(audiomanager.stream_music);             mmediaplayer.setdatasource(mcontext, uri.parse(video_url));             mmediaplayer.setonpreparedlistener(new mediaplayer.onpreparedlistener() {                 @override                 public void onprepared(mediaplayer mp) {                     mp.start();                     ((activity)mcontext).runonuithread(new runnable() {                         @override                         public void run() {                         holder.imgthumbnail.getparent().requesttransparentregion(holder.imgthumbnail);                         holder.imgthumbnail.setvisibility(view.gone);                         holder.imgthumbnail.getparent().requesttransparentregion(holder.imgthumbnail);                         }                     });                     toast.maketext(mcontext,"onprepared",toast.length_long).show();                  }             });          } catch (illegalargumentexception | securityexception | illegalstateexception | ioexception e) {             e.printstacktrace();         }          mmediaplayer.prepareasync(); 

xml of surfaceview

<relativelayout         android:layout_width="410dp"         android:id="@+id/v_view"         android:visibility="visible"         android:layout_height="307.50dp">          <surfaceview             android:id="@+id/video_view"             android:layout_width="410dp"             android:layout_height="307.50dp"              />          <imageview             android:id="@+id/imgthumbnail"             android:layout_width="match_parent"             android:layout_height="match_parent"             android:visibility="visible"             android:scaletype="centercrop" />     </relativelayout> 

code using videoview

videoview.setonpreparedlistener(new mediaplayer.onpreparedlistener() {     @override     public void onprepared(mediaplayer mediaplayer) {         log.i(tag,"onprepared");         new  handler().postdelayed(new runnable() {             @override             public void run() {                 videoview.start();                 toast.maketext(mcontext,"start video",toast.length_long).show();                  ((activity)mcontext).runonuithread(new runnable() {                     @override                     public void run() {                       holder.imgthumbnail.getparent().                     requesttransparentregion(holder.imgthumbnail);                      holder.imgthumbnail.setvisibility(view.gone);                     holder.imgthumbnail.getparent().                     requesttransparentregion(holder.imgthumbnail);                     }                 });             }         },100);     } }); 

xml of videoview

<relativelayout         android:layout_width="410dp"         android:id="@+id/v_view"         android:visibility="visible"         android:layout_height="307.50dp">          <videoview             android:id="@+id/video_view"             android:layout_width="410dp"             android:layout_height="307.50dp"              />          <imageview             android:id="@+id/imgthumbnail"             android:layout_width="match_parent"             android:layout_height="match_parent"             android:visibility="gone"             android:background="@color/back_orange"             android:scaletype="centercrop" />     </relativelayout> 

please help! i'm stuck