Recreate all activities after changing app language

app/src/main/java/com/hippo/ehviewer/ui/fragment/AdvancedFragment.java

@@ -24,24 +24,24 @@ import android.content.res.Resources;
 import android.os.Bundle;
 import android.preference.Preference;
 import android.preference.PreferenceFragment;
-import android.text.TextUtils;
 import android.widget.Toast;
 
 import com.hippo.ehviewer.AppConfig;
 import com.hippo.ehviewer.EhApplication;
 import com.hippo.ehviewer.EhDB;
 import com.hippo.ehviewer.R;
-import com.hippo.ehviewer.Settings;
 import com.hippo.util.LogCat;
 import com.hippo.util.ReadableTime;
 
 import java.io.File;
 import java.util.Arrays;
 
-public class AdvancedFragment extends PreferenceFragment implements Preference.OnPreferenceClickListener {
+public class AdvancedFragment extends PreferenceFragment
+    implements Preference.OnPreferenceClickListener, Preference.OnPreferenceChangeListener {
 
     private static final String KEY_DUMP_LOGCAT = "dump_logcat";
     private static final String KEY_CLEAR_MEMORY_CACHE = "clear_memory_cache";
+    private static final String KEY_APP_LANGUAGE = "app_language";
     private static final String KEY_EXPORT_DATA = "export_data";
     private static final String KEY_IMPORT_DATA = "import_data";
 
@@ -52,6 +52,7 @@ public class AdvancedFragment extends PreferenceFragment implements Preference.O
 
         Preference dumpLogcat = findPreference(KEY_DUMP_LOGCAT);
         Preference clearMemoryCache = findPreference(KEY_CLEAR_MEMORY_CACHE);
+        Preference appLanguage = findPreference(KEY_APP_LANGUAGE);
         Preference exportData = findPreference(KEY_EXPORT_DATA);
         Preference importData = findPreference(KEY_IMPORT_DATA);
 
@@ -59,6 +60,8 @@ public class AdvancedFragment extends PreferenceFragment implements Preference.O
         clearMemoryCache.setOnPreferenceClickListener(this);
         exportData.setOnPreferenceClickListener(this);
         importData.setOnPreferenceClickListener(this);
+
+        appLanguage.setOnPreferenceChangeListener(this);
     }
 
     @Override
@@ -131,4 +134,14 @@ public class AdvancedFragment extends PreferenceFragment implements Preference.O
             }
         }).show();
     }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        String key = preference.getKey();
+        if (KEY_APP_LANGUAGE.equals(key)) {
+            ((EhApplication) getActivity().getApplication()).recreate();
+            return true;
+        }
+        return false;
+    }
 }