add languages MultiSelectListPreference. but not all languages.

app/src/main/java/net/schueller/peertube/activity/VideoListActivity.java

@@ -60,6 +60,7 @@ import net.schueller.peertube.service.VideoPlayerService;
 
 
 import java.util.ArrayList;
+import java.util.Set;
 
 import retrofit2.Call;
 import retrofit2.Callback;
@@ -253,16 +254,16 @@ public class VideoListActivity extends AppCompatActivity {
 
         SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
         String nsfw = sharedPref.getBoolean("pref_show_nsfw", false) ? "both" : "false";
-
+        Set<String> languages = sharedPref.getStringSet("pref_language", null);
         String apiBaseURL = APIUrlHelper.getUrlWithVersion(this);
 
         GetVideoDataService service = RetrofitInstance.getRetrofitInstance(apiBaseURL).create(GetVideoDataService.class);
 
         Call<VideoList> call;
         if (!searchQuery.equals("")) {
-            call = service.searchVideosData(start, count, sort, nsfw, searchQuery, filter);
+            call = service.searchVideosData(start, count, sort, nsfw, searchQuery, filter, languages);
         } else {
-            call = service.getVideosData(start, count, sort, nsfw, filter);
+            call = service.getVideosData(start, count, sort, nsfw, filter, languages);
         }
 
         /*Log the URL called*/

app/src/main/java/net/schueller/peertube/network/GetVideoDataService.java

@@ -20,6 +20,8 @@ package net.schueller.peertube.network;
 import net.schueller.peertube.model.Video;
 import net.schueller.peertube.model.VideoList;
 
+import java.util.Set;
+
 import retrofit2.Call;
 import retrofit2.http.GET;
 import retrofit2.http.Path;
@@ -32,7 +34,8 @@ public interface GetVideoDataService {
             @Query("count") int count,
             @Query("sort") String sort,
             @Query("nsfw") String nsfw,
-            @Query("filter") String filter
+            @Query("filter") String filter,
+            @Query("languageOneOf") Set<String> languages
     );
 
     @GET("videos/{id}")
@@ -47,6 +50,7 @@ public interface GetVideoDataService {
             @Query("sort") String sort,
             @Query("nsfw") String nsfw,
             @Query("search") String search,
-            @Query("filter") String filter
+            @Query("filter") String filter,
+            @Query("languageOneOf") Set<String> languages
     );
 }

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

@@ -44,5 +44,15 @@
         <item>AppTheme.GRAY</item>
         <item>AppTheme.BLUEGRAY</item>
     </string-array>
+    <string-array name="languageArray">
+        <item>@string/en</item>
+        <item>@string/fr</item>
+    </string-array>
+
+    <string-array name="languageValues">
+        <item>en</item>
+        <item>fr</item>
+    </string-array>
+    <string-array name="empty_array"/>
 
 </resources>

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

@@ -47,6 +47,8 @@
 
     <string name="pref_title_show_nsfw">Show NSFW</string>
     <string name="pref_description_show_nsfw">NSFW content will be shown if enabled.</string>
+    <string name="pref_language">Show Languages</string>
+    <string name="pref_description_language">Select languages be shown.</string>
     <string name="title_activity_url_video_play">UrlVideoPlayActivity</string>
     <string name="pref_title_torrent_player">Torrent Video Player</string>
     <string name="pref_description_torrent_player">Video playback via a torrent stream. This requires Storage Permissions. (Alpha, not stable!)</string>
@@ -65,6 +67,9 @@
     <string name="pref_title_app_theme">App Theme</string>
     <string name="pref_description_app_theme">Restart App for theme to take effect.</string>
 
+    <string name="en">English</string>
+    <string name="fr">French</string>
+
     <string name="red">Red</string>
     <string name="pink">Pink</string>
     <string name="purple">Purple</string>

app/src/main/res/xml/pref_general.xml

@@ -22,6 +22,14 @@
         android:summary="@string/pref_description_show_nsfw"
         android:defaultValue="false" />
 
+    <MultiSelectListPreference
+        android:defaultValue="@array/empty_array"
+        android:entries="@array/languageArray"
+        android:entryValues="@array/languageValues"
+        android:key="pref_language"
+        android:summary="@string/pref_description_language"
+        android:title="@string/pref_language" />
+
     <ListPreference
         android:title="@string/pref_title_app_theme"
         android:summary="@string/pref_description_app_theme"