Made locale non dependent on phone OS settings, but choosable on app settings (#4366)

* setLocale added

* localization added

* test complete

* resolved conflicts

* issues resolved

* minor issues fixed

* Made methods concise

* Issues fixed

app/src/main/java/fr/free/nrw/commons/contributions/MainActivity.java

@@ -1,7 +1,9 @@
 package fr.free.nrw.commons.contributions;
 
+import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.os.Build.VERSION;
 import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
@@ -37,6 +39,7 @@ import fr.free.nrw.commons.nearby.fragments.NearbyParentFragment.NearbyParentFra
 import fr.free.nrw.commons.notification.NotificationActivity;
 import fr.free.nrw.commons.notification.NotificationController;
 import fr.free.nrw.commons.quiz.QuizChecker;
+import fr.free.nrw.commons.settings.SettingsFragment;
 import fr.free.nrw.commons.theme.BaseActivity;
 import fr.free.nrw.commons.upload.worker.UploadWorker;
 import fr.free.nrw.commons.utils.ViewUtilWrapper;
@@ -107,6 +110,7 @@ public class MainActivity  extends BaseActivity
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        loadLocale();
         setContentView(R.layout.main);
         ButterKnife.bind(this);
         setSupportActionBar(toolbar);
@@ -365,4 +369,14 @@ public class MainActivity  extends BaseActivity
         BOOKMARK,
         MORE
     }
+
+    /**
+     * Load default language in onCreate from SharedPreferences
+     */
+    private void loadLocale(){
+        final SharedPreferences preferences = getSharedPreferences("Settings", Activity.MODE_PRIVATE);
+        final String language = preferences.getString("language", "");
+        final SettingsFragment settingsFragment = new SettingsFragment();
+        settingsFragment.setLocale(this, language);
+    }
 }

app/src/main/java/fr/free/nrw/commons/settings/Prefs.java

@@ -7,7 +7,8 @@ public class Prefs {
     public static final String DEFAULT_LICENSE = "defaultLicense";
     public static final String UPLOADS_SHOWING = "uploadsshowing";
     public static final String MANAGED_EXIF_TAGS = "managed_exif_tags";
-    public static final String KEY_LANGUAGE_VALUE = "languageDescription";
+    public static final String DESCRIPTION_LANGUAGE = "descriptionLanguage";
+    public static final String APP_UI_LANGUAGE = "appUiLanguage";
     public static final String KEY_THEME_VALUE = "appThemePref";
     public static final String TELEMETRY_PREFERENCE = "telemetryPref";
 

app/src/main/java/fr/free/nrw/commons/settings/SettingsFragment.java

@@ -1,17 +1,19 @@
 package fr.free.nrw.commons.settings;
 
+import static android.content.Context.MODE_PRIVATE;
+
 import android.Manifest;
+import android.app.Activity;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.res.Configuration;
 import android.net.Uri;
 import android.os.Bundle;
-import android.text.InputFilter;
-import android.text.InputType;
-import androidx.preference.EditTextPreference;
 import android.view.View;
 import androidx.preference.ListPreference;
 import androidx.preference.MultiSelectListPreference;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
-import com.google.android.material.snackbar.Snackbar;
 import androidx.preference.PreferenceGroupAdapter;
 import androidx.preference.PreferenceScreen;
 import androidx.preference.PreferenceViewHolder;
@@ -23,17 +25,17 @@ import com.mapbox.mapboxsdk.Mapbox;
 import com.mapbox.mapboxsdk.maps.TelemetryDefinition;
 import fr.free.nrw.commons.R;
 import fr.free.nrw.commons.Utils;
+import fr.free.nrw.commons.contributions.MainActivity;
 import fr.free.nrw.commons.di.ApplicationlessInjection;
 import fr.free.nrw.commons.kvstore.JsonKvStore;
 import fr.free.nrw.commons.logging.CommonsLogSender;
-import fr.free.nrw.commons.upload.Language;
 import fr.free.nrw.commons.utils.PermissionUtils;
 import fr.free.nrw.commons.utils.ViewUtil;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
+import java.util.Objects;
 import javax.inject.Inject;
 import javax.inject.Named;
 import org.wikipedia.language.AppLanguageLookUpTable;
@@ -48,7 +50,9 @@ public class SettingsFragment extends PreferenceFragmentCompat {
     CommonsLogSender commonsLogSender;
 
     private ListPreference themeListPreference;
-    private ListPreference langListPreference;
+    private ListPreference descriptionLanguageListPreference;
+    private ListPreference appUiLanguageListPreference;
+    private String keyLanguageListPreference;
 
     @Override
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
@@ -73,8 +77,16 @@ public class SettingsFragment extends PreferenceFragmentCompat {
             });
         }
 
-        langListPreference = findPreference("descriptionDefaultLanguagePref");
+        appUiLanguageListPreference = findPreference("appUiDefaultLanguagePref");
-        prepareLanguages();
+        assert appUiLanguageListPreference != null;
+        keyLanguageListPreference = appUiLanguageListPreference.getKey();
+        prepareAppLanguages(keyLanguageListPreference);
+
+        descriptionLanguageListPreference = findPreference("descriptionDefaultLanguagePref");
+        assert descriptionLanguageListPreference != null;
+        keyLanguageListPreference = descriptionLanguageListPreference.getKey();
+        prepareAppLanguages(keyLanguageListPreference);
+
         Preference betaTesterPreference = findPreference("becomeBetaTester");
         betaTesterPreference.setOnPreferenceClickListener(preference -> {
             Utils.handleWebUrl(getActivity(), Uri.parse(getResources().getString(R.string.beta_opt_in_link)));
@@ -141,14 +153,17 @@ public class SettingsFragment extends PreferenceFragmentCompat {
 
     /**
      * Prepares language summary and language codes list and adds them to list preference as pairs.
-     * Uses previously saved language if there is any, if not uses phone local as initial language.
+     * Uses previously saved language if there is any, if not uses phone locale as initial language.
+     * Get ListPreference key and act accordingly for each ListPreference.
      * Adds preference changed listener and saves value chosen by user to shared preferences
-     * to remember later
+     * to remember later and recall MainActivity to reflect language changes
+     * @param keyListPreference
      */
-    private void prepareLanguages() {
+    private void prepareAppLanguages(final String keyListPreference) {
-        List<String> languageNamesList;
+        final List<String> languageNamesList;
-        List<String> languageCodesList;
+        final List<String> languageCodesList;
-        AppLanguageLookUpTable appLanguageLookUpTable = new AppLanguageLookUpTable(getContext());
+        final AppLanguageLookUpTable appLanguageLookUpTable = new AppLanguageLookUpTable(
+            Objects.requireNonNull(getContext()));
         languageNamesList = appLanguageLookUpTable.getLocalizedNames();
         languageCodesList = appLanguageLookUpTable.getCodes();
         List<String> languageNameWithCodeList = new ArrayList<>();
@@ -157,35 +172,99 @@ public class SettingsFragment extends PreferenceFragmentCompat {
             languageNameWithCodeList.add(languageNamesList.get(i) + "[" + languageCodesList.get(i) + "]");
         }
 
-        CharSequence[] languageNames = languageNameWithCodeList.toArray(new CharSequence[0]);
+        final CharSequence[] languageNames = languageNamesList.toArray(new CharSequence[0]);
-        CharSequence[] languageCodes = languageCodesList.toArray(new CharSequence[0]);
+        final CharSequence[] languageCodes = languageCodesList.toArray(new CharSequence[0]);
         // Add all languages and languages codes to lists preference as pair
-        langListPreference.setEntries(languageNames);
-        langListPreference.setEntryValues(languageCodes);
 
         // Gets current language code from shared preferences
-        String languageCode = getCurrentLanguageCode();
+        final String languageCode = getCurrentLanguageCode(keyListPreference);
+
+        if (keyListPreference.equals("appUiDefaultLanguagePref")) {
+            appUiLanguageListPreference.setEntries(languageNames);
+            appUiLanguageListPreference.setEntryValues(languageCodes);
+
+            assert languageCode != null;
             if (languageCode.equals("")) {
                 // If current language code is empty, means none selected by user yet so use phone local
-            langListPreference.setValue(Locale.getDefault().getLanguage());
+                appUiLanguageListPreference.setValue(Locale.getDefault().getLanguage());
             } else {
                 // If any language is selected by user previously, use it
-            langListPreference.setValue(languageCode);
+                appUiLanguageListPreference.setValue(languageCode);
             }
 
-        langListPreference.setOnPreferenceChangeListener((preference, newValue) -> {
+            appUiLanguageListPreference.setOnPreferenceChangeListener((preference, newValue) -> {
-            String userSelectedValue = (String) newValue;
+                final String userSelectedValue = (String) newValue;
-            saveLanguageValue(userSelectedValue);
+                setLocale(Objects.requireNonNull(getActivity()), userSelectedValue);
+                saveLanguageValue(userSelectedValue, keyListPreference);
+                getActivity().recreate();
+                final Intent intent = new Intent(getActivity(), MainActivity.class);
+                startActivity(intent);
+                return true;
+            });
+
+        } else if (keyListPreference.equals("descriptionDefaultLanguagePref")) {
+            descriptionLanguageListPreference.setEntries(languageNames);
+            descriptionLanguageListPreference.setEntryValues(languageCodes);
+
+            assert languageCode != null;
+            if (languageCode.equals("")) {
+                // If current language code is empty, means none selected by user yet so use phone local
+                descriptionLanguageListPreference.setValue(Locale.getDefault().getLanguage());
+            } else {
+                // If any language is selected by user previously, use it
+                descriptionLanguageListPreference.setValue(languageCode);
+            }
+
+            descriptionLanguageListPreference.setOnPreferenceChangeListener((preference, newValue) -> {
+                final String userSelectedValue = (String) newValue;
+                saveLanguageValue(userSelectedValue, keyListPreference);
                 return true;
             });
         }
-
-    private void saveLanguageValue(String userSelectedValue) {
-        defaultKvStore.putString(Prefs.KEY_LANGUAGE_VALUE, userSelectedValue);
     }
 
-    private String getCurrentLanguageCode() {
+    /**
-        return defaultKvStore.getString(Prefs.KEY_LANGUAGE_VALUE, "");
+     * Changing the default app language with selected one and save it to SharedPreferences
+     */
+    public void setLocale(final Activity activity, final String userSelectedValue) {
+        final Locale locale = new Locale(userSelectedValue);
+        Locale.setDefault(locale);
+        final Configuration configuration = new Configuration();
+        configuration.locale = locale;
+        activity.getBaseContext().getResources().updateConfiguration(configuration,
+            activity.getBaseContext().getResources().getDisplayMetrics());
+
+        final SharedPreferences.Editor editor = activity.getSharedPreferences("Settings", MODE_PRIVATE).edit();
+        editor.putString("language", userSelectedValue);
+        editor.apply();
+    }
+
+    /**
+     * Save userselected language in List Preference
+     * @param userSelectedValue
+     * @param preferenceKey
+     */
+    private void saveLanguageValue(final String userSelectedValue, final String preferenceKey) {
+        if (preferenceKey.equals("appUiDefaultLanguagePref")) {
+            defaultKvStore.putString(Prefs.APP_UI_LANGUAGE, userSelectedValue);
+        } else if (preferenceKey.equals("descriptionDefaultLanguagePref")) {
+            defaultKvStore.putString(Prefs.DESCRIPTION_LANGUAGE, userSelectedValue);
+        }
+    }
+
+    /**
+     * Gets current language code from shared preferences
+     * @param preferenceKey
+     * @return
+     */
+    private String getCurrentLanguageCode(final String preferenceKey) {
+        if (preferenceKey.equals("appUiDefaultLanguagePref")) {
+            return defaultKvStore.getString(Prefs.APP_UI_LANGUAGE, "");
+        }
+        if (preferenceKey.equals("descriptionDefaultLanguagePref")) {
+            return defaultKvStore.getString(Prefs.DESCRIPTION_LANGUAGE, "");
+        }
+        return null;
     }
 
     /**

app/src/main/java/fr/free/nrw/commons/upload/mediaDetails/UploadMediaDetailFragment.java

@@ -39,8 +39,6 @@ import fr.free.nrw.commons.upload.UploadItem;
 import fr.free.nrw.commons.utils.DialogUtil;
 import fr.free.nrw.commons.utils.ImageUtils;
 import fr.free.nrw.commons.utils.ViewUtil;
-import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 import java.util.Locale;
 import javax.inject.Inject;
@@ -182,7 +180,7 @@ public class UploadMediaDetailFragment extends UploadBaseFragment implements
      * init the description recycler veiw and caption recyclerview
      */
     private void initRecyclerView() {
-        uploadMediaDetailAdapter = new UploadMediaDetailAdapter(defaultKvStore.getString(Prefs.KEY_LANGUAGE_VALUE, ""));
+        uploadMediaDetailAdapter = new UploadMediaDetailAdapter(defaultKvStore.getString(Prefs.DESCRIPTION_LANGUAGE, ""));
         uploadMediaDetailAdapter.setCallback(this::showInfoAlert);
         uploadMediaDetailAdapter.setEventListener(this);
         rvDescriptions.setLayoutManager(new LinearLayoutManager(getContext()));

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

@@ -610,6 +610,7 @@ Upload your first media by tapping on the add button.</string>
   <string name="media_detail_step_title">Media Details</string>
   <string name="menu_view_category_page">View category page</string>
   <string name="menu_view_item_page">View item page</string>
+  <string name="app_ui_language">App user interface language</string>
   <string name="remove">Removes a caption and description</string>
   <string name="read_help_link">Read more</string>
 

app/src/main/res/xml/preferences.xml

@@ -26,6 +26,12 @@
           android:summary="@string/use_external_storage_summary"
           android:title="@string/use_external_storage" />
 
+        <ListPreference
+          android:key="appUiDefaultLanguagePref"
+          app:useSimpleSummaryProvider="true"
+          app:singleLineTitle="false"
+          android:title="@string/app_ui_language" />
+
         <ListPreference
           android:key="descriptionDefaultLanguagePref"
           app:useSimpleSummaryProvider="true"