Some improvements

app/src/main/java/app/fedilab/fedilabtube/MainActivity.java

@@ -1,8 +1,14 @@
 package app.fedilab.fedilabtube;
 
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuItem;
 
+import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.navigation.NavController;
 import androidx.navigation.Navigation;
@@ -11,7 +17,13 @@ import androidx.navigation.ui.NavigationUI;
 
 import com.google.android.material.bottomnavigation.BottomNavigationView;
 
+import org.jetbrains.annotations.NotNull;
+
 import app.fedilab.fedilabtube.asynctasks.RetrievePeertubeInformationAsyncTask;
+import app.fedilab.fedilabtube.helper.Helper;
+
+import static app.fedilab.fedilabtube.helper.Helper.academies;
+import static app.fedilab.fedilabtube.helper.Helper.getLiveInstance;
 
 public class MainActivity extends AppCompatActivity {
 
@@ -36,4 +48,46 @@ public class MainActivity extends AppCompatActivity {
         NavigationUI.setupWithNavController(navView, navController);
     }
 
+    @Override
+    public boolean onCreateOptionsMenu(@NotNull Menu menu) {
+        getMenuInflater().inflate(R.menu.main_menu, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == R.id.action_change_instance) {
+            showRadioButtonDialog();
+            return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
+
+    private void showRadioButtonDialog() {
+
+        AlertDialog.Builder alt_bld = new AlertDialog.Builder(this);
+        alt_bld.setTitle(R.string.instance_choice);
+        final SharedPreferences sharedpreferences = getSharedPreferences(Helper.APP_PREFS, Context.MODE_PRIVATE);
+        String acad = sharedpreferences.getString(Helper.PREF_INSTANCE, "ac-lyon.fr");
+        int i = 0;
+        for(String item: academies){
+            if( item.compareTo(acad) == 0) {
+                break;
+            }
+            i++;
+        }
+        alt_bld.setSingleChoiceItems(academies, i, (dialog, item) -> {
+            String newInstance = academies[item];
+            SharedPreferences.Editor editor = sharedpreferences.edit();
+            editor.putString(Helper.PREF_INSTANCE, newInstance);
+            editor.commit();
+            dialog.dismiss();
+            recreate();
+
+        });
+        AlertDialog alert = alt_bld.create();
+        alert.show();
+
+    }
 }

app/src/main/java/app/fedilab/fedilabtube/helper/Helper.java

@@ -119,7 +119,8 @@ public class Helper {
     public static final String SET_DISPLAY_CONFIRM = "set_display_confirm";
     public static final String INTENT_ADD_UPLOADED_MEDIA = "intent_add_uploaded_media";
     //List of available academies
-    public static List<String> academies = new ArrayList<>(Arrays.asList(
+
+    public static String[] academies = {
             "ac-aix-marseille.fr",
             "ac-amiens.fr",
             "ac-besancon.fr",
@@ -150,7 +151,7 @@ public class Helper {
             "ac-strasbourg.fr",
             "ac-toulouse.fr",
             "ac-versailles.fr"
-    ));
+    };
 
     /**
      * Returns the peertube URL depending of the academic domain name

app/src/main/res/drawable/ic_baseline_track_changes_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M19.07,4.93l-1.41,1.41C19.1,7.79 20,9.79 20,12c0,4.42 -3.58,8 -8,8s-8,-3.58 -8,-8c0,-4.08 3.05,-7.44 7,-7.93v2.02C8.16,6.57 6,9.03 6,12c0,3.31 2.69,6 6,6s6,-2.69 6,-6c0,-1.66 -0.67,-3.16 -1.76,-4.24l-1.41,1.41C15.55,9.9 16,10.9 16,12c0,2.21 -1.79,4 -4,4s-4,-1.79 -4,-4c0,-1.86 1.28,-3.41 3,-3.86v2.14c-0.6,0.35 -1,0.98 -1,1.72 0,1.1 0.9,2 2,2s2,-0.9 2,-2c0,-0.74 -0.4,-1.38 -1,-1.72V2h-1C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10c0,-2.76 -1.12,-5.26 -2.93,-7.07z"/>
+</vector>

app/src/main/res/menu/main_menu.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/action_change_instance"
+        android:icon="@drawable/ic_baseline_track_changes_24"
+        android:title="@string/change_instance"
+        app:showAsAction="ifRoom" />
+
+    <item
+        android:id="@+id/action_account"
+        android:icon="@drawable/ic_outline_account_circle_24"
+        android:title="@string/account"
+        app:showAsAction="ifRoom" />
+</menu>

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

@@ -94,4 +94,7 @@
     <string name="display_nsfw_videos">Afficher les vidéos sensibles</string>
     <string name="action_playlist_add">Vous n\'avez aucune liste de lecture. Cliquez sur l\'icône « + » pour en ajouter une</string>
     <string name="not_logged_in">Vous devez être connecté.e pour effectuer cette action !</string>
+    <string name="change_instance">Changer d\'instance</string>
+    <string name="account">Compte</string>
+    <string name="instance_choice">Choisissez une instance</string>
 </resources>