Firebase извлекает дату размещения изображения и вычисляет, сколько дней между начальной датой и текущей датой

Question

Так что это мой дизайн, и текстовое представление моего требуемого времени находится внизу слева, именно там я просматриваю свои x дней, и по умолчанию в настоящее время он обычно не вычисляет дни.

Поэтому у меня возникла проблема с получением даты публикации изображения и вычислением x дней между начальной и текущей датами независимо для каждого сообщения.

Итак, япытался получить дату разницы с отметкой времени в методе пытался вызвать этот метод к другому методу, чтобы установить разницу дней между начальной и текущей датой в моем TextView. Я пробовал несколько способов получить только результат по умолчанию, возможно, я использую это неправильно?

public class PostAdapter extends RecyclerView.Adapter<PostAdapter.ImageViewHolder> {

    private Context mContext;
    private List<Post> mPosts;
    private Post post;
    private FirebaseUser firebaseUser;

    public PostAdapter(Context context, List<Post> posts){
        mContext = context;
        mPosts = posts;
    }


    @NonNull
    @Override
    public PostAdapter.ImageViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.post_item, parent, false);
        return new PostAdapter.ImageViewHolder(view);
    }

    @Override
    public void onBindViewHolder( final PostAdapter.ImageViewHolder holder, final int position) {

        firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
        final Post post = mPosts.get(position);



        if(post.getPostimage() != null) {
            Glide.with(mContext.getApplicationContext()).load(post.getPostimage())
                    .apply(new RequestOptions().placeholder(R.drawable.placeholder))
                    .into(holder.post_image);



        }
        else
        {
            Glide.with(mContext.getApplicationContext()).load("https://firebasestorage.googleapis.com/v0/b/araba-92732.appspot.com/o/placeholder.png?alt=media&token=b98a5c60-1ebf-4d14-bad4-b4e707c59d56")
                    .apply(new RequestOptions().placeholder(R.drawable.placeholder))
                    .into(holder.post_image);
        }

        if (post.getCarType() == null
                && post.getPrice() == null
                && post.getModel() == null
                && post.getDistance() == null
                && post.getColor() == null
                && post.getLocation() == null){

            holder.carType2.setVisibility(View.GONE);
            holder.price.setVisibility(View.GONE);
            holder.model.setVisibility(View.GONE);
            holder.distance.setVisibility(View.GONE);
            holder.color.setVisibility(View.GONE);
            holder.tvLocation.setVisibility(View.GONE);

        }

        else {
            holder.carType2.setVisibility(View.VISIBLE);
            holder.carType2.setText(post.getCarType());

            holder.price.setVisibility(View.VISIBLE);
            holder.price.setText(post.getPrice());

            holder.model.setVisibility(View.VISIBLE);
            holder.model.setText(post.getModel());

            holder.distance.setVisibility(View.VISIBLE);
            holder.distance.setText(post.getDistance());

            holder.color.setVisibility(View.VISIBLE);
            holder.color.setText(post.getColor());

            holder.tvLocation.setVisibility(View.VISIBLE);
            holder.tvLocation.setText(post.getLocation());
        }

        publisherInfo(holder.image_profile, holder.tvPublisher, post.getPublisher());
        isLiked(post.getPostid(), holder.like);
        isSaved(post.getPostid(), holder.save);
        nrLikes(holder.likes, post.getPostid());

if(firebaseUser != null) {
    holder.like.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (holder.like.getTag().equals("like")) {
                FirebaseDatabase.getInstance().getReference().child("Likes").child(post.getPostid())
                        .child(firebaseUser.getUid()).setValue(true);
                addNotification(post.getPublisher(), post.getPostid());
            } else {
                FirebaseDatabase.getInstance().getReference().child("Likes").child(post.getPostid())
                        .child(firebaseUser.getUid()).removeValue();
            }
        }
    });

    holder.save.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (holder.save.getTag().equals("save")) {
                FirebaseDatabase.getInstance().getReference().child("Saves").child(firebaseUser.getUid())
                        .child(post.getPostid()).setValue(true);
            } else {
                FirebaseDatabase.getInstance().getReference().child("Saves").child(firebaseUser.getUid())
                        .child(post.getPostid()).removeValue();
            }
        }
    });
}
        holder.image_profile.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                SharedPreferences.Editor editor = mContext.getSharedPreferences("PREFS", MODE_PRIVATE).edit();
                editor.putString("profileid", post.getPublisher());
                editor.apply();

                ((FragmentActivity)mContext).getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                        new ProfileFragment()).commit();
            }
        });


            holder.post_image.setOnClickListener(new View.OnClickListener()
            {
                @Override
                public void onClick(View view)
                {
                    SharedPreferences.Editor editor = mContext.getSharedPreferences("PREFS", MODE_PRIVATE).edit();
                    editor.putString("postid", post.getPostid());
                    editor.apply();

                    ((FragmentActivity) mContext).getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                            new PostDetailFragment()).commit();
                }
            });


        holder.likes.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(mContext, FollowersActivity.class);
                intent.putExtra("id", post.getPostid());
                intent.putExtra("title", "likes");
                mContext.startActivity(intent);
            }
        });

        holder.more.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                PopupMenu popupMenu = new PopupMenu(mContext, view);
                popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem menuItem) {
                        switch (menuItem.getItemId()){
                            case R.id.edit:
                                editPost(post.getPostid());
                                return true;
                            case R.id.delete:
                                final String id = post.getPostid();
                                FirebaseDatabase.getInstance().getReference("Posts")
                                        .child(post.getPostid()).removeValue()
                                        .addOnCompleteListener(new OnCompleteListener<Void>() {
                                            @Override
                                            public void onComplete(@NonNull Task<Void> task) {
                                                if (task.isSuccessful()){
                                                    deleteNotifications(id, firebaseUser.getUid());
                                                }
                                            }
                                        });
                                return true;
                            case R.id.report:
                                Toast.makeText(mContext, "Reported clicked!", Toast.LENGTH_SHORT).show();
                                return true;
                            default:
                                return false;
                        }
                    }
                });
                popupMenu.inflate(R.menu.post_menu);
                if (!post.getPublisher().equals(firebaseUser.getUid())){
                    popupMenu.getMenu().findItem(R.id.edit).setVisible(false);
                    popupMenu.getMenu().findItem(R.id.delete).setVisible(false);
                }
                else if (post.getPublisher().equals(firebaseUser.getUid())){
                    popupMenu.getMenu().findItem(R.id.report).setVisible(false);
                }

                popupMenu.show();
            }
        });
    }

@Override
    public int getItemCount() {
        return mPosts.size();
    }

    class ImageViewHolder extends RecyclerView.ViewHolder {

        ImageView image_profile, post_image, like, save, more;
        TextView carType2, likes, carType, price, model, distance, color, tvLocation, tvPublisher, iTP;

        ImageViewHolder(View itemView) {
            super(itemView);

            image_profile = itemView.findViewById(R.id.image_profile);
            carType2 = itemView.findViewById(R.id.carType2);
            post_image = itemView.findViewById(R.id.post_image);
            like = itemView.findViewById(R.id.like);
            save = itemView.findViewById(R.id.save);
            likes = itemView.findViewById(R.id.likes);
            carType = itemView.findViewById(R.id.carType);
            price = itemView.findViewById(R.id.price);
            model = itemView.findViewById(R.id.model);
            distance = itemView.findViewById(R.id.distance);
            color = itemView.findViewById(R.id.color);
            tvLocation = itemView.findViewById(R.id.tvLocation);
            tvPublisher = itemView.findViewById(R.id.tvPublisher);
            iTP = itemView.findViewById(R.id.image_time_posted);

            more = itemView.findViewById(R.id.more);
            }

        private void setupWidgets(){
            String timestampDiff = getTimestampDifference();
            if(!timestampDiff.equals("0")){
                iTP.setText(timestampDiff + " DAYS AGO");
            }else{
                iTP.setText("TODAY");
            }

        }

        private String getTimestampDifference(){

            String difference = "";
            Calendar c = Calendar.getInstance();
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.GERMAN);
            sdf.setTimeZone(TimeZone.getTimeZone("German"));//google 'android list of timezones'
            Date today = c.getTime();
            sdf.format(today);
            Date timestamp;
                final String photoTimestamp = post.getPostimage();

                try {
                    timestamp = sdf.parse(photoTimestamp);
                    difference = String.valueOf(Math.round(((today.getTime() - timestamp.getTime()) / 1000 / 60 / 60 / 24)));
                } catch (ParseException e) {
                    difference = "0";
                }

            return difference;
        }
    }

Это мой домашний фрагмент, содержащий RV сообщений

package com.capstone.araba.Fragments;

import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.capstone.araba.Adapter.PostAdapter;
import com.capstone.araba.Model.Post;
import com.capstone.araba.R;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import java.util.TimeZone;

public class HomeFragment extends Fragment
{

    private PostAdapter postAdapter;
    private List<Post> postList;
    private FirebaseUser firebaseUser;


    private List<String> followingList;

    private ProgressBar progress_circular;
    private EditText search_bar, search_bar2;
    private TextView iTP;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.activity_home_fragment, container, false);

        RecyclerView recyclerView = view.findViewById(R.id.recycler_view);
        recyclerView.setHasFixedSize(true);
        LinearLayoutManager mLayoutManager = new LinearLayoutManager(getContext());
        mLayoutManager.setReverseLayout(true);
        mLayoutManager.setStackFromEnd(true);
        recyclerView.setLayoutManager(mLayoutManager);
        search_bar = view.findViewById(R.id.search_bar);
        search_bar2 = view.findViewById(R.id.search_bar2);
        postList = new ArrayList<>();
        postAdapter = new PostAdapter(getContext(), postList);
        recyclerView.setAdapter(postAdapter);


        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext(),
                LinearLayoutManager.HORIZONTAL, false);

        progress_circular = view.findViewById(R.id.progress_circular);

        search_bar.clearFocus();
        search_bar2.clearFocus();

        checkFollowing();
        readPostsSearch();

        search_bar.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                searchPosts(charSequence.toString(),"carType");
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });

        search_bar2.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                searchPosts(charSequence.toString(),"location");
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });
        return view;
    }



    private void searchPosts(String s, String type){

            final Query query = FirebaseDatabase.getInstance().getReference("Posts").orderByChild(type)
                    .startAt(s.toUpperCase())
                    .endAt(s.toLowerCase() + "\uf8ff");

        query.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

                postList.clear();
                for (DataSnapshot snapshot : dataSnapshot.getChildren()){
                    Post post = snapshot.getValue(Post.class);
                    postList.add(post);
                }

                postAdapter.notifyDataSetChanged();
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });

    }



    private void readPostsSearch() {

        final FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
        DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Posts");

        reference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                if (search_bar.getText().toString().equals("") || search_bar2.getText().toString().equals("")) {
                    postList.clear();
                    for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                        Post post = snapshot.getValue(Post.class);
                        progress_circular.setVisibility(View.GONE);
                        postList.add(post);

                    }

                    postAdapter.notifyDataSetChanged();
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });
    }

    private void checkFollowing(){
        firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
        assert firebaseUser != null;
        followingList = new ArrayList<>();
        if(firebaseUser != null) {
            DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Follow")
                    .child(Objects.requireNonNull(FirebaseAuth.getInstance().getCurrentUser()).getUid())
                    .child("following");


            reference.addValueEventListener(new ValueEventListener() {
                @Override
                public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                    followingList.clear();
                    for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                        followingList.add(snapshot.getKey());
                    }

                    readPosts();
                }

                @Override
                public void onCancelled(@NonNull DatabaseError databaseError) {

                }
            });
        }
    }

    private void readPosts(){
        firebaseUser = FirebaseAuth.getInstance().getCurrentUser();

            DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Posts");


            reference.addValueEventListener(new ValueEventListener() {
                @Override
                public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                    postList.clear();
                    for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                        Post post = snapshot.getValue(Post.class);

//                    for (String id : followingList){
//                        if (post.getPublisher().equals(id)){
                        postList.add(post);
                        progress_circular.setVisibility(View.GONE);

//                        }
//                    }
                    }

                    postAdapter.notifyDataSetChanged();
                    progress_circular.setVisibility(View.GONE);

                }

                @Override
                public void onCancelled(@NonNull DatabaseError databaseError) {
                }
            });
    }
}