Some other implementations...

app/src/main/java/fr/gouv/etalab/mastodon/activities/MainActivity.java

@@ -779,6 +779,7 @@ public class MainActivity extends AppCompatActivity
     @Override
     public void onResume(){
         super.onResume();
+        refreshData();
         //Proceeds to update of the authenticated account
         if(Helper.isLoggedIn(getApplicationContext()))
             new UpdateAccountInfoByIDAsyncTask(getApplicationContext(), MainActivity.this).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
@@ -980,11 +981,13 @@ public class MainActivity extends AppCompatActivity
             String last_refresh = sharedpreferences.getString(Helper.LAST_BUBBLE_REFRESH + account.getId(), null);
             Date last_refresh_date = Helper.stringToDate(getApplicationContext(), last_refresh);
             if (last_refresh_date == null || new Date().getTime() - last_refresh_date.getTime() >= TimeUnit.MINUTES.toMillis(5)) {
-                homeFragment.update();
+                if( homeFragment != null && notificationsFragment != null){
-                notificationsFragment.update();
+                    homeFragment.update();
-                SharedPreferences.Editor editor = sharedpreferences.edit();
+                    notificationsFragment.update();
-                editor.putString(Helper.LAST_BUBBLE_REFRESH+ account.getId(),Helper.dateToString(getApplicationContext(), new Date()));
+                    SharedPreferences.Editor editor = sharedpreferences.edit();
-                editor.apply();
+                    editor.putString(Helper.LAST_BUBBLE_REFRESH+ account.getId(),Helper.dateToString(getApplicationContext(), new Date()));
+                    editor.apply();
+                }
             }
 
         }

app/src/main/java/fr/gouv/etalab/mastodon/asynctasks/RetrieveFeedsAsyncTask.java

@@ -15,9 +15,14 @@
 package fr.gouv.etalab.mastodon.asynctasks;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.AsyncTask;
+
+import java.util.Date;
+
 import fr.gouv.etalab.mastodon.client.API;
 import fr.gouv.etalab.mastodon.client.APIResponse;
+import fr.gouv.etalab.mastodon.helper.Helper;
 import fr.gouv.etalab.mastodon.interfaces.OnRetrieveFeedsInterface;
 
 
@@ -56,6 +61,8 @@ public class RetrieveFeedsAsyncTask extends AsyncTask<Void, Void, Void> {
         this.max_id = max_id;
         this.listener = onRetrieveFeedsInterface;
         this.refreshData = true;
+        updateTimeRefresh();
+
     }
 
     public RetrieveFeedsAsyncTask(Context context, Type action, String targetedID, String max_id, boolean showMediaOnly, OnRetrieveFeedsInterface onRetrieveFeedsInterface){
@@ -66,6 +73,7 @@ public class RetrieveFeedsAsyncTask extends AsyncTask<Void, Void, Void> {
         this.targetedID = targetedID;
         this.showMediaOnly = showMediaOnly;
         this.refreshData = true;
+        updateTimeRefresh();
     }
     public RetrieveFeedsAsyncTask(Context context, Type action, String tag, String targetedID, String max_id, OnRetrieveFeedsInterface onRetrieveFeedsInterface){
         this.context = context;
@@ -75,6 +83,7 @@ public class RetrieveFeedsAsyncTask extends AsyncTask<Void, Void, Void> {
         this.targetedID = targetedID;
         this.tag = tag;
         this.refreshData = true;
+        updateTimeRefresh();
     }
 
     public RetrieveFeedsAsyncTask(Context context, Type action, String max_id, boolean refreshData, OnRetrieveFeedsInterface onRetrieveFeedsInterface){
@@ -83,6 +92,7 @@ public class RetrieveFeedsAsyncTask extends AsyncTask<Void, Void, Void> {
         this.max_id = max_id;
         this.listener = onRetrieveFeedsInterface;
         this.refreshData = refreshData;
+        updateTimeRefresh();
     }
 
     @Override
@@ -125,4 +135,13 @@ public class RetrieveFeedsAsyncTask extends AsyncTask<Void, Void, Void> {
         listener.onRetrieveFeeds(apiResponse, refreshData);
     }
 
+    private void updateTimeRefresh(){
+        if( action == Type.HOME) {
+            final SharedPreferences sharedpreferences = context.getSharedPreferences(Helper.APP_PREFS, android.content.Context.MODE_PRIVATE);
+            SharedPreferences.Editor editor = sharedpreferences.edit();
+            String userId = sharedpreferences.getString(Helper.PREF_KEY_ID, null);
+            editor.putString(Helper.LAST_BUBBLE_REFRESH + userId, Helper.dateToString(context, new Date()));
+            editor.apply();
+        }
+    }
 }

app/src/main/java/fr/gouv/etalab/mastodon/asynctasks/RetrieveNotificationsAsyncTask.java

@@ -15,9 +15,14 @@
 package fr.gouv.etalab.mastodon.asynctasks;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.AsyncTask;
+
+import java.util.Date;
+
 import fr.gouv.etalab.mastodon.client.API;
 import fr.gouv.etalab.mastodon.client.APIResponse;
+import fr.gouv.etalab.mastodon.helper.Helper;
 import fr.gouv.etalab.mastodon.interfaces.OnRetrieveNotificationsInterface;
 
 
@@ -46,6 +51,7 @@ public class RetrieveNotificationsAsyncTask extends AsyncTask<Void, Void, Void>
         this.userId = userId;
         this.token = token;
         this.refreshData = true;
+        updateTimeRefresh();
     }
 
     public RetrieveNotificationsAsyncTask(Context context, String instance, String token, String max_id, String acct, String userId, boolean refreshData, OnRetrieveNotificationsInterface onRetrieveNotificationsInterface){
@@ -57,6 +63,7 @@ public class RetrieveNotificationsAsyncTask extends AsyncTask<Void, Void, Void>
         this.userId = userId;
         this.token = token;
         this.refreshData = refreshData;
+        updateTimeRefresh();
     }
 
     @Override
@@ -75,4 +82,10 @@ public class RetrieveNotificationsAsyncTask extends AsyncTask<Void, Void, Void>
         listener.onRetrieveNotifications(apiResponse, acct, userId, refreshData);
     }
 
+    private void updateTimeRefresh(){
+        final SharedPreferences sharedpreferences = context.getSharedPreferences(Helper.APP_PREFS, android.content.Context.MODE_PRIVATE);
+        SharedPreferences.Editor editor = sharedpreferences.edit();
+        editor.putString(Helper.LAST_BUBBLE_REFRESH+ userId,Helper.dateToString(context, new Date()));
+        editor.apply();
+    }
 }

app/src/main/java/fr/gouv/etalab/mastodon/fragments/DisplayNotificationsFragment.java

@@ -26,9 +26,11 @@ import android.view.ViewGroup;
 import android.widget.AbsListView;
 import android.widget.ListView;
 import android.widget.RelativeLayout;
+import android.widget.TextView;
 import android.widget.Toast;
 
 import java.util.ArrayList;
+import java.util.Date;
 import java.util.List;
 
 import fr.gouv.etalab.mastodon.activities.MainActivity;
@@ -69,6 +71,12 @@ public class DisplayNotificationsFragment extends Fragment implements OnRetrieve
     private DisplayNotificationsFragment displayNotificationsFragment;
     private List<Notification> notificationsTemp;
     private String new_max_id;
+    private TextView new_data;
+
+
+    public DisplayNotificationsFragment(){
+        displayNotificationsFragment = this;
+    }
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
@@ -81,12 +89,12 @@ public class DisplayNotificationsFragment extends Fragment implements OnRetrieve
         notifications = new ArrayList<>();
         swiped = false;
         newElements = 0;
-        displayNotificationsFragment = this;
+
         swipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.swipeContainer);
         SharedPreferences sharedpreferences = context.getSharedPreferences(Helper.APP_PREFS, Context.MODE_PRIVATE);
         notificationPerPage = sharedpreferences.getInt(Helper.SET_NOTIFICATIONS_PER_PAGE, 15);
         lv_notifications = (ListView) rootView.findViewById(R.id.lv_notifications);
-
+        new_data = (TextView) rootView.findViewById(R.id.new_data);
         mainLoader = (RelativeLayout) rootView.findViewById(R.id.loader);
         nextElementLoader = (RelativeLayout) rootView.findViewById(R.id.loading_next_notifications);
         textviewNoAction = (RelativeLayout) rootView.findViewById(R.id.no_action);
@@ -132,6 +140,17 @@ public class DisplayNotificationsFragment extends Fragment implements OnRetrieve
                 R.color.mastodonC3);
 
         asyncTask = new RetrieveNotificationsAsyncTask(context, null, null, max_id, null, null, DisplayNotificationsFragment.this).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+
+        new_data.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if( notificationsTemp != null && notificationsTemp.size() > 0 && new_max_id != null){
+                    new_data.setVisibility(View.GONE);
+                    manageNotifications(notificationsTemp, new_max_id);
+                }
+            }
+        });
+
         return rootView;
     }
 
@@ -173,11 +192,15 @@ public class DisplayNotificationsFragment extends Fragment implements OnRetrieve
             swiped = false;
             return;
         }
+        SharedPreferences.Editor editor = sharedpreferences.edit();
+        editor.putString(Helper.LAST_BUBBLE_REFRESH+ userId,Helper.dateToString(context, new Date()));
+        editor.apply();
+
         String old_max_id = max_id;
-        new_max_id = apiResponse.getMax_id();
         List<Notification> notifications = apiResponse.getNotifications();
         if( refreshData || !displayNotificationsFragment.isVisible()) {
-            manageNotifications(notifications, new_max_id);
+            max_id = apiResponse.getMax_id();
+            manageNotifications(notifications, max_id);
             if( !displayNotificationsFragment.isVisible()){
                 int countData = 0;
                 for(Notification nt : notifications){
@@ -188,6 +211,7 @@ public class DisplayNotificationsFragment extends Fragment implements OnRetrieve
                 ((MainActivity)getActivity()).updateNotifCounter(countData);
             }
         }else {
+            new_max_id = apiResponse.getMax_id();
             notificationsTemp = notifications;
         }
 

app/src/main/java/fr/gouv/etalab/mastodon/fragments/DisplayStatusFragment.java

@@ -29,8 +29,10 @@ import android.view.ViewGroup;
 import android.widget.AbsListView;
 import android.widget.ListView;
 import android.widget.RelativeLayout;
+import android.widget.TextView;
 import android.widget.Toast;
 import java.util.ArrayList;
+import java.util.Date;
 import java.util.List;
 
 import fr.gouv.etalab.mastodon.activities.MainActivity;
@@ -78,6 +80,12 @@ public class DisplayStatusFragment extends Fragment implements OnRetrieveFeedsIn
     private DisplayStatusFragment displayStatusFragment;
     private List<Status> statusesTemp;
     private String new_max_id;
+    private TextView new_data;
+
+
+    public DisplayStatusFragment(){
+        displayStatusFragment = this;
+    }
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
@@ -110,7 +118,7 @@ public class DisplayStatusFragment extends Fragment implements OnRetrieveFeedsIn
         firstLoad = true;
         swiped = false;
         newElements = 0;
-        displayStatusFragment = this;
+
 
         isOnWifi = Helper.isOnWIFI(context);
         swipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.swipeContainer);
@@ -126,7 +134,7 @@ public class DisplayStatusFragment extends Fragment implements OnRetrieveFeedsIn
         nextElementLoader.setVisibility(View.GONE);
         statusListAdapter = new StatusListAdapter(context, type, targetedId, isOnWifi, behaviorWithAttachments, this.statuses);
         lv_status.setAdapter(statusListAdapter);
-
+        new_data = (TextView) rootView.findViewById(R.id.new_data);
         if( !comesFromSearch){
 
             //Hide account header when scrolling for ShowAccountActivity
@@ -194,6 +202,16 @@ public class DisplayStatusFragment extends Fragment implements OnRetrieveFeedsIn
                 textviewNoAction.setVisibility(View.VISIBLE);
         }
 
+        new_data.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if( statusesTemp != null && statusesTemp.size() > 0 && new_max_id != null){
+                    new_data.setVisibility(View.GONE);
+                    manageStatus(statusesTemp, new_max_id);
+                }
+            }
+        });
+
         return rootView;
     }
 
@@ -226,8 +244,8 @@ public class DisplayStatusFragment extends Fragment implements OnRetrieveFeedsIn
         mainLoader.setVisibility(View.GONE);
         nextElementLoader.setVisibility(View.GONE);
         //Discards 404 - error which can often happen due to toots which have been deleted
+        final SharedPreferences sharedpreferences = context.getSharedPreferences(Helper.APP_PREFS, Context.MODE_PRIVATE);
         if( apiResponse.getError() != null && !apiResponse.getError().getError().startsWith("404 -")){
-            final SharedPreferences sharedpreferences = context.getSharedPreferences(Helper.APP_PREFS, Context.MODE_PRIVATE);
             boolean show_error_messages = sharedpreferences.getBoolean(Helper.SET_SHOW_ERROR_MESSAGES, true);
             if( show_error_messages)
                 Toast.makeText(context, apiResponse.getError().getError(),Toast.LENGTH_LONG).show();
@@ -236,25 +254,36 @@ public class DisplayStatusFragment extends Fragment implements OnRetrieveFeedsIn
             flag_loading = false;
             return;
         }
-        List<Status> statuses = apiResponse.getStatuses();
+        if( type == RetrieveFeedsAsyncTask.Type.HOME){
-        String old_max_id = max_id;
+            SharedPreferences.Editor editor = sharedpreferences.edit();
-        new_max_id = apiResponse.getMax_id();
+            String userId = sharedpreferences.getString(Helper.PREF_KEY_ID, null);
-
+            editor.putString(Helper.LAST_BUBBLE_REFRESH+ userId,Helper.dateToString(context, new Date()));
-        if( refreshData || !displayStatusFragment.isVisible()) {
+            editor.apply();
-            manageStatus(statuses, max_id);
+            List<Status> statuses = apiResponse.getStatuses();
-            if( !displayStatusFragment.isVisible()){
+            String old_max_id = max_id;
-                int countData = 0;
+            if( refreshData || !displayStatusFragment.isVisible()) {
-                for(Status st : statuses){
+                max_id = apiResponse.getMax_id();
-                    if( st.getId().equals(old_max_id))
+                manageStatus(statuses, max_id);
-                        break;
+                if( !displayStatusFragment.isVisible()){
-                    countData++;
+                    int countData = 0;
+                    for(Status st : statuses){
+                        if( st.getId().equals(old_max_id))
+                            break;
+                        countData++;
+                    }
+                    ((MainActivity)getActivity()).updateHomeCounter(countData);
                 }
-                ((MainActivity)getActivity()).updateNotifCounter(countData);
+            }else {
+                new_max_id = apiResponse.getMax_id();
+                statusesTemp = statuses;
             }
         }else {
-            statusesTemp = statuses;
+            max_id = apiResponse.getMax_id();
+            manageStatus(statuses, max_id);
         }
 
+
+
     }
 
     private void manageStatus(List<Status> statuses, String max_id){

app/src/main/res/layout-sw600dp/fragment_notifications.xml

@@ -79,5 +79,16 @@
             android:layout_height="match_parent"
             android:indeterminate="true" />
     </RelativeLayout>
+
+    <TextView
+        android:visibility="gone"
+        android:padding="10dp"
+        android:gravity="center"
+        android:text="@string/new_data"
+        android:layout_alignParentBottom="true"
+        android:id="@+id/new_data"
+        android:layout_width="match_parent"
+        android:textSize="18sp"
+        android:layout_height="wrap_content"/>
 </RelativeLayout>
 

app/src/main/res/layout-sw600dp/fragment_status.xml

@@ -77,5 +77,17 @@
             android:layout_height="match_parent"
             android:indeterminate="true" />
     </RelativeLayout>
+
+
+    <TextView
+        android:visibility="gone"
+        android:padding="10dp"
+        android:gravity="center"
+        android:text="@string/new_data"
+        android:layout_alignParentBottom="true"
+        android:id="@+id/new_data"
+        android:layout_width="match_parent"
+        android:textSize="18sp"
+        android:layout_height="wrap_content"/>
 </RelativeLayout>
 

app/src/main/res/layout/fragment_notifications.xml

@@ -79,5 +79,16 @@
             android:layout_height="match_parent"
             android:indeterminate="true" />
     </RelativeLayout>
+
+    <TextView
+        android:visibility="gone"
+        android:padding="10dp"
+        android:gravity="center"
+        android:text="@string/new_data"
+        android:layout_alignParentBottom="true"
+        android:id="@+id/new_data"
+        android:layout_width="match_parent"
+        android:textSize="16sp"
+        android:layout_height="wrap_content"/>
 </RelativeLayout>
 

app/src/main/res/layout/fragment_status.xml

@@ -77,5 +77,17 @@
             android:layout_height="match_parent"
             android:indeterminate="true" />
     </RelativeLayout>
+
+
+    <TextView
+        android:visibility="gone"
+        android:padding="10dp"
+        android:gravity="center"
+        android:text="@string/new_data"
+        android:layout_alignParentBottom="true"
+        android:id="@+id/new_data"
+        android:layout_width="match_parent"
+        android:textSize="16sp"
+        android:layout_height="wrap_content"/>
 </RelativeLayout>
 

app/src/main/res/values-fr/strings.xml

@@ -57,6 +57,8 @@
     <string name="shared_via">Partagé via Mastalab</string>
     <string name="replies">Réponses</string>
     <string name="username">Nom d\'utilisateur</string>
+
+    <string name="new_data">De nouvelles données sont disponibles ! Souhaitez-vous les afficher ?</string>
     <!--- Menu -->
     <string name="home_menu">Accueil</string>
     <string name="local_menu">Fil public local</string>

app/src/main/res/values/strings.xml

@@ -59,6 +59,8 @@
     <string name="shared_via">Shared via Mastalab</string>
     <string name="replies">Replies</string>
     <string name="username">User name</string>
+
+    <string name="new_data">New data are available! Do you want to display them?</string>
     <!--- Menu -->
     <string name="home_menu">Home</string>
     <string name="local_menu">Local timeline</string>