#21: After SettingsActivity#changeLocale the locale of all open paren…

…t Activities are also updated

app/src/main/java/de/k3b/android/androFotoFinder/SettingsActivity.java

@@ -31,6 +31,7 @@
 
 import java.io.File;
 
+import de.k3b.android.widget.AboutDialogPreference;
 import de.k3b.android.widget.LocalizedActivity;
 import uk.co.senab.photoview.HugeImageLoader;
 import uk.co.senab.photoview.PhotoViewAttacher;
@@ -55,7 +56,7 @@ protected void onCreate(final Bundle savedInstanceState) {
             @Override
             public boolean onPreferenceChange(Preference preference, Object newValue) {
                 setLanguage((String) newValue);
-                SettingsActivity.super.recreate();
+                LocalizedActivity.recreate(SettingsActivity.this);
                 return true; // change is allowed
             }
         });
@@ -188,6 +189,9 @@ public static void show(Activity parent) {
     private void updateSummary() {
         final String languageKey = prefsInstance.getString(Global.PREF_KEY_USER_LOCALE, "");
         setLanguage(languageKey);
+        AboutDialogPreference about =
+                (AboutDialogPreference) findPreference("about");
+        about.setTitle(AboutDialogPreference.getAboutTitle(this));
     }
 
     private void setLanguage(String languageKey) {

app/src/main/java/de/k3b/android/widget/AboutDialogPreference.java

@@ -54,7 +54,7 @@ public AboutDialogPreference(Context context, AttributeSet attrs) {
     }
 
     @NonNull
-    private static String getAboutTitle(Context context) {
+    public static String getAboutTitle(Context context) {
         return context.getString(R.string.about_summary,context.getString(R.string.version_postfix));
     }
 

app/src/main/java/de/k3b/android/widget/LocalizedActivity.java

@@ -21,27 +21,60 @@
  * Created by k3b on 07.01.2016.
  */
 public class LocalizedActivity extends Activity {
+    /** if myLocale != Locale.Default : activity must be recreated in on resume */
+    private Locale myLocale = null;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         fixLocale(this);
         super.onCreate(savedInstanceState);
     }
 
+    @Override
+    protected void onResume() {
+        super.onResume();
+
+        // Locale has changed by other Activity ?
+        if ((myLocale != null) && (myLocale.getLanguage() != Locale.getDefault().getLanguage())) {
+            myLocale = null;
+            recreate();
+        }
+    }
+
+    /**
+     * Set Activity-s locale to SharedPreferences-setting.
+     * Must be called before
+     * @param context
+     */
     public static void fixLocale(Context context)
     {
         final SharedPreferences prefs = PreferenceManager
                 .getDefaultSharedPreferences(context);
         String language = prefs.getString(Global.PREF_KEY_USER_LOCALE, "");
-        Locale locale = Global.systemLocale;
+        Locale locale = Global.systemLocale; // in case that setting=="use android-locale"
         if ((language != null) && (!language.isEmpty())) {
-            locale = new Locale(language);
+            locale = new Locale(language); // overwrite "use android-locale"
+        }
+
+        if (locale != null) {
+            Locale.setDefault(locale);
+            Configuration config = new Configuration();
+            config.locale = locale;
+            Resources resources = context.getResources();
+            resources.updateConfiguration(config, resources.getDisplayMetrics());
+            // recreate();
+
+            if (context instanceof LocalizedActivity) {
+                ((LocalizedActivity) context).myLocale = locale;
+            }
+        }
+    }
+
+    public static void recreate(Activity context) {
+        while (context != null) {
+            context.recreate();
+            context = context.getParent();
         }
-        Locale.setDefault(locale);
-        Configuration config = new Configuration();
-        config.locale = locale;
-        Resources resources = context.getResources();
-        resources.updateConfiguration(config, resources.getDisplayMetrics());
-        // recreate();
+
     }
 }