android - Using Intent to move from one activity to other takes alongtime and show blank screen -


i showing mp3 files of device in recyclerview.on click of item of recyclerview,i moving other activity shows blank screen few seconds , moves next activity. adapter class of recyclerview follos:

public class songsadapter extends recyclerview.adapter<songsadapter.myviewholder>{     context context;     arraylist<hashmap<string, string>> songlist;      public songsadapter(arraylist<hashmap<string, string>> songlist,context context) {         this.songlist = songlist;         this.context=context;     }      @override     public myviewholder oncreateviewholder(viewgroup parent, int viewtype) {         view view = layoutinflater.from(parent.getcontext()).inflate(r.layout.list_item, parent, false);         return new myviewholder(view,context);      }      @override     public void onbindviewholder(myviewholder holder, int position) {          holder.textview.settext(songlist.get(position).get("file_name"));     }      @override     public int getitemcount() {         return songlist.size();     }      public class myviewholder extends recyclerview.viewholder  implements view.onclicklistener {         private textview textview;         context context;          public myviewholder(view itemview, context context){             super(itemview);             this.context = context;             textview=(textview)itemview.findviewbyid(r.id.listitemtextview);             itemview.setonclicklistener(this);          }          @override         public void onclick(view v) {             int position=getadapterposition();             intent intent=new intent(context,finalactivity.class);             intent.putextra("name",songlist.get(position).get("file_name"));             intent.putextra("position",position);             intent.setflags(intent.flag_activity_new_task);             context.startactivity(intent);         }     }  }

xml of final activity

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context="pritish.sawant.com.musicplayer.finalactivity">      <imageview         android:id="@+id/finalactivityimageview"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_margintop="20dp" />      <imagebutton         android:id="@+id/shuffle"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@+id/finalactivityimageview"         android:layout_marginleft="120dp"         android:background="@android:color/white"         android:src="@mipmap/repeat" />      <imagebutton         android:id="@+id/repeat"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignbaseline="@+id/shuffle"         android:layout_below="@+id/finalactivityimageview"         android:layout_marginleft="50dp"         android:layout_torightof="@+id/shuffle"         android:background="@android:color/white"         android:src="@mipmap/shuffle" />      <linearlayout         android:id="@+id/linear"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_below="@+id/repeat"         android:layout_margintop="30dp"         android:orientation="horizontal">          <textview             android:id="@+id/currenttextview"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_below="@+id/shuffle"             android:layout_marginleft="30dp"             tools:text="hi" />          <textview             android:id="@+id/finaltextview"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_below="@+id/repeat"             android:layout_marginleft="300dp"             tools:text="hi" />     </linearlayout>      <seekbar         android:id="@+id/seekbar"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_below="@+id/linear"         android:layout_marginleft="30dp"         android:layout_marginright="30dp"         android:layout_margintop="20dp" />      <linearlayout         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_below="@+id/seekbar"         android:layout_margintop="30dp"         android:orientation="horizontal">          <imagebutton             android:id="@+id/previous"             android:layout_width="0dp"             android:layout_weight="1"             android:layout_height="wrap_content"             android:background="@android:color/white"             android:src="@mipmap/previous"             />          <imagebutton             android:id="@+id/rewind"             android:layout_width="0dp"             android:layout_weight="1"             android:layout_height="wrap_content"             android:background="@android:color/white"             android:src="@mipmap/rewind" />          <imagebutton             android:id="@+id/play"             android:layout_width="0dp"             android:layout_weight="1"             android:layout_height="wrap_content"             android:background="@android:color/white"             android:src="@mipmap/play" />          <imagebutton             android:id="@+id/forward"             android:layout_width="0dp"             android:layout_weight="1"             android:layout_height="wrap_content"             android:background="@android:color/white"             android:src="@mipmap/forward" />          <imagebutton             android:id="@+id/next"             android:layout_width="0dp"             android:layout_weight="1"             android:layout_height="wrap_content"             android:background="@android:color/white"             android:src="@mipmap/next" />      </linearlayout>  </relativelayout>

i using asynctask retrieve mp3 files displaying mp3 files on recycler view takes time

its because started intent in myviewholder class. try this:

public class myviewholder extends recyclerview.viewholder {   public textview textview;//make public          view mview;// make view here           public myviewholder(view itemview, context context){         super(itemview);         this.context = context;         textview=(textview)itemview.findviewbyid(r.id.listitemtextview);         mview = itemview;//--note-- make mview = iteem view       }       //dont set on click listner methods in here

}

now our onbindviewholder set listners here holder parameter:

 @override     public void onbindviewholder(myviewholder holder, int position) {   //--note replace dataitem class/model/   final dataitem itemsong = songlist.get(position);      try {     //this bind recyclerview textview not sure why there      //a string says file_name should itemsong.getfilename();     holder.textview.settext(songlist.get("file_name"));        }       } catch (exception e) {         e.printstacktrace();     }             //clicking of recyclycleview  holder.mview.setonclicklistener(new view.onclicklistener() {//getting viewholder class , ctor     @override     public void onclick(view v) {       intent intent = new intent(context,finalactivity.class));             //--note create static constant string @ top of class             //    public static final string item_key ="item_id_key";              intent.putextra(item_key,itemsong);                             context.startactivity(intent);      } });

know recive intent in final activity call:

final dataitemsongs itemsong = getintent().getextras().getparcelable(songsadapter.item_key);

from here can use itemsong object , call properties , set in views ex 

nametxt.settext(itemsong.name);

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