Added a couple of Helper methods to allow a status's date to be clickable, so that an absolute date & time are shown (SHORT format for both) for 5 seconds.

app/src/main/java/fr/gouv/etalab/mastodon/drawers/NotificationsListAdapter.java

@@ -259,6 +259,8 @@ public class NotificationsListAdapter extends RecyclerView.Adapter implements On
             holder.status_reblog_count.setText(String.valueOf(status.getReblogs_count()));
             holder.status_date.setText(Helper.dateDiff(context, status.getCreated_at()));
 
+            Helper.absoluteDateTimeReveal(context, holder.status_date, status.getCreated_at());
+
             //Adds attachment -> disabled, to enable them uncomment the line below
             //loadAttachments(status, holder);
             holder.notification_status_container.setVisibility(View.VISIBLE);

app/src/main/java/fr/gouv/etalab/mastodon/drawers/SearchListAdapter.java

@@ -185,6 +185,8 @@ public class SearchListAdapter extends BaseAdapter {
             holder.status_content.setAutoLinkMask(Linkify.WEB_URLS);
             holder.status_toot_date.setText(Helper.dateDiff(context, status.getCreated_at()));
 
+            Helper.absoluteDateTimeReveal(context, holder.status_toot_date, status.getCreated_at());
+
             Glide.with(holder.status_account_profile.getContext())
                     .load(ppurl)
                     .into(holder.status_account_profile);

app/src/main/java/fr/gouv/etalab/mastodon/drawers/StatusListAdapter.java

@@ -267,7 +267,6 @@ public class StatusListAdapter extends RecyclerView.Adapter implements OnPostAct
             status_replies_profile_pictures = itemView.findViewById(R.id.status_replies_profile_pictures);
             new_element = itemView.findViewById(R.id.new_element);
             status_action_container = itemView.findViewById(R.id.status_action_container);
-
         }
     }
 
@@ -572,6 +571,7 @@ public class StatusListAdapter extends RecyclerView.Adapter implements OnPostAct
 
             holder.status_toot_date.setText(Helper.dateDiff(context, status.getCreated_at()));
 
+            Helper.absoluteDateTimeReveal(context, holder.status_toot_date, status.getCreated_at());
 
             if( status.getReblog() != null) {
                 Glide.with(holder.status_account_profile_boost.getContext())

app/src/main/java/fr/gouv/etalab/mastodon/helper/Helper.java

@@ -25,6 +25,7 @@ import android.graphics.Color;
 import android.graphics.PorterDuffXfermode;
 import android.graphics.Rect;
 import android.graphics.RectF;
+import android.os.CountDownTimer;
 import android.support.annotation.Nullable;
 import android.support.v4.graphics.drawable.DrawableCompat;
 import android.support.v7.app.AlertDialog;
@@ -105,6 +106,7 @@ import java.io.OutputStream;
 import java.net.InetAddress;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
+import java.text.DateFormat;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
@@ -479,6 +481,56 @@ public class Helper {
         return date;
     }
 
+    /**
+     * Converts a Date date into a date-time string (SHORT format for both)
+     * @param context
+     * @param date to be converted
+     * @return String
+     */
+
+    public static String shortDateTime(Context context, Date date) {
+        Locale userLocale;
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            userLocale = context.getResources().getConfiguration().getLocales().get(0);
+        } else {
+            //noinspection deprecation
+            userLocale = context.getResources().getConfiguration().locale;
+        }
+
+        DateFormat df = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT, userLocale);
+
+        return df.format(date);
+    }
+
+    /**
+     * Makes the tvDate TextView field clickable, and displays the absolute date & time of a toot
+     *  for 5 seconds.
+     * @param context Context
+     * @param tvDate TextView
+     * @param date Date
+     */
+
+    public static void absoluteDateTimeReveal(final Context context, final TextView tvDate, final Date date) {
+        tvDate.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+
+                tvDate.setText(Helper.shortDateTime(context, date));
+
+                new CountDownTimer((5 * 1000), 1000) {
+
+                    public void onTick(long millisUntilFinished) {
+                    }
+
+                    public void onFinish() {
+                        tvDate.setText(Helper.dateDiff(context, date));
+                    }
+                }.start();
+            }
+        });
+    }
+
     /**
      * Check if WIFI is opened
      * @param context Context