Adapter

package com.aye.chat.Topics;

import android.content.Context;
import android.content.Intent;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.PopupMenu;
import android.widget.TextView;

import com.aye.chat.Pages.FullScreenImageView;
import com.aye.chat.ProfileView;
import com.aye.chat.R;
import com.aye.chat.Rooms.ChatRoom;
import com.aye.chat.Updated.Discussion;
import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.DiskCacheStrategy;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import com.like.LikeButton;
import com.like.OnLikeListener;

import java.util.ArrayList;
import java.util.Collections;

import de.hdodenhof.circleimageview.CircleImageView;

public class TopicsAdapter extends RecyclerView.Adapter<TopicsAdapter.ViewHolder>{
    Context c;
    ArrayList<Topic> topics = new ArrayList<>();
    private String username;

    public TopicsAdapter(Context c,String username) {
        this.c = c;
        this.username = username;
    }

    public void updateList(ArrayList<Topic> d){

        topics.addAll(d);
        notifyDataSetChanged();
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from (parent.getContext ()).inflate (R.layout.topic_card, parent, false);
        return new ViewHolder (v);
    }

    @Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {

        final PopupMenu p = new PopupMenu(c,holder.more);
        p.getMenuInflater().inflate(R.menu.topic_menu, p.getMenu());
        final Topic data = topics.get(position);
        holder.text.setText(data.getCaption());
        holder.name.setText(data.getUsername());
        String id = data.getId();
        //holder.category.setText(data.getCaption());
        long millis = System.currentTimeMillis();
        long posttime = data.getTime();
        long timedifference = millis-posttime;
        final int days = (int) (timedifference / (1000*60*60*24));
        if (days<2){
            holder.time.setText("Today");
        }else {
            holder.time.setText(days+" days ago");
        }
        FirebaseDatabase.getInstance().getReference().child("userdata").child(data.getUsername()).child("pic").addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                Glide.with(c).load(dataSnapshot.getValue(String.class))
                        .override(50,50)
                        .dontAnimate()
                        .placeholder(R.drawable.dog40)
                        .skipMemoryCache(true)
                        .centerCrop()
                        .into(holder.pic);
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });
        //holder.count.setText(d.child("time").getValue(String.class));
        FirebaseDatabase.getInstance().getReference().child("topics").child("likes").child(data.getId()).child(username).addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                if (dataSnapshot.child("like").exists()){

                    holder.like.setImageResource(R.drawable.ic_favorite_red_500_36dp);
                    holder.like.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            FirebaseDatabase.getInstance().getReference().child("topics").child("likes").child(data.getId()).child(username).child("like").removeValue();

                        }
                    });

                }else if(dataSnapshot.child("dislike").exists()) {

                    holder.like.setImageResource(R.drawable.brokenheart);
                    holder.like.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            FirebaseDatabase.getInstance().getReference().child("topics").child("likes").child(data.getId()).child(username).child("dislike").removeValue();

                        }
                    });
                }else{
                    holder.like.setImageResource(R.drawable.ic_favorite_border_red_500_36dp);
                    holder.like.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            FirebaseDatabase.getInstance().getReference().child("topics").child("likes").child(data.getId()).child(username).child("dislike").removeValue();
                            FirebaseDatabase.getInstance().getReference().child("topics").child("likes").child(data.getId()).child(username).child("like").setValue(true);

                        }
                    });


                }


            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });

        holder.like.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                FirebaseDatabase.getInstance().getReference().child("topics").child("likes").child(data.getId()).child(username).child("like").removeValue();
                FirebaseDatabase.getInstance().getReference().child("topics").child("likes").child(data.getId()).child(username).child("dislike").setValue(true);

                return true;
            }
        });
        //holder.count.setText(d.child("count").getValue(String.class));

        holder.discuss.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i = new Intent(c, Discussion.class);
                i.putExtra("id", data.getId());
                i.putExtra("user", data.getUsername());
                i.putExtra("caption", data.getCaption());
                i.putExtra("pic",data.getPic());
                i.putExtra("time",holder.time.getText());

                c.startActivity(i);
            }
        });
        holder.pic.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i2 = new Intent(c, ProfileView.class);
                i2.putExtra("username", data.getUsername());
                i2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                c.startActivity(i2);
            }
        });

        holder.more.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                p.show();
            }
        });

    }

    @Override
    public void setHasStableIds(boolean hasStableIds) {
        super.setHasStableIds(hasStableIds);
    }



    @Override
    public int getItemCount() {
        if (topics!=null)
            return topics.size();
        else
            return 0;
    }
    @Override
    public void onViewRecycled(ViewHolder holder) {
        super.onViewRecycled(holder);
        Glide.clear(holder.pic);
    }

    @Override
    public long getItemId(int position) {
        return super.getItemId(position);
    }

    @Override
    public int getItemViewType(int position) {
        return super.getItemViewType(position);
    }
    public class ViewHolder extends RecyclerView.ViewHolder {
        private TextView text;
        private ImageView image;
        private TextView name;
        private TextView time;
        private TextView category;
        private ImageView more;
        private TextView count;
        private CircleImageView pic;
        private ImageView like;
        private Button discuss;


        private Button msg;


        public ViewHolder(View itemView) {
            super (itemView);
            text = itemView.findViewById(R.id.caption);
            name = itemView.findViewById(R.id.name);
            time = itemView.findViewById(R.id.time);
            category = itemView.findViewById(R.id.category);
            more = itemView.findViewById(R.id.more);
            count = itemView.findViewById(R.id.count);
            pic = itemView.findViewById(R.id.icon);
            like = itemView.findViewById(R.id.like_button);
            discuss = itemView.findViewById(R.id.discuss);
            count = itemView.findViewById(R.id.count);

        }
    }


}