feat: add real-time font size update in settings page

- Settings page now updates immediately when font size preference changes
- Subscribe to TextSizeChangeEvent using EventBus
- Clear all scaling tags before applying new font size
- Reset text to original size before reapplying scaling
- No need to exit and re-enter settings to see changes

Users can now see font size changes instantly in the settings page itself.

Author: graycreate

app/src/main/java/me/ghui/v2er/module/settings/SettingFragment.java

@@ -31,12 +31,15 @@
 import me.ghui.v2er.util.Utils;
 import me.ghui.v2er.util.Voast;
 import me.ghui.v2er.widget.dialog.ConfirmDialog;
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
 
 /**
  * Created by ghui on 10/06/2017.
  */
 
 public class SettingFragment extends PreferenceFragment implements Preference.OnPreferenceClickListener {
+    private ListView mListView;
     private Preference cachePref;
     private Preference loginPreference;
 
@@ -73,6 +76,9 @@ public void onCreate(Bundle savedInstanceState) {
         fontItem.setSummary(fontItem.getValue());
         fontItem.setOnPreferenceChangeListener((preference, newValue) -> {
             fontItem.setSummary(newValue + "");
+            // Clear all scaling tags before applying new scaling
+            clearFontScalingTags();
+            // Post event will trigger onTextSizeChange to reapply scaling
             Bus.post(new TextSizeChangeEvent(FontSizeUtil.getContentSize()));
             return true;
         });
@@ -81,21 +87,28 @@ public void onCreate(Bundle savedInstanceState) {
     @Override
     public void onStart() {
         super.onStart();
+        Bus.register(this);
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        Bus.unRegister(this);
     }
 
     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
         View rootView = getView();
         rootView.setBackgroundColor(Theme.getColor(R.attr.page_bg_color, getActivity()));
-        ListView list = rootView.findViewById(android.R.id.list);
-        if (list != null) {
-            list.setDivider(null);
-//            list.setDivider(getActivity().getDrawable(R.drawable.common_divider));
-            Utils.setPaddingForNavbar(list);
+        mListView = rootView.findViewById(android.R.id.list);
+        if (mListView != null) {
+            mListView.setDivider(null);
+//            mListView.setDivider(getActivity().getDrawable(R.drawable.common_divider));
+            Utils.setPaddingForNavbar(mListView);
 
             // Apply font scaling to preference items
-            applyFontScalingToPreferences(list);
+            applyFontScalingToPreferences(mListView);
         }
     }
 
@@ -137,6 +150,50 @@ public void onScroll(android.widget.AbsListView view, int firstVisibleItem,
         }, 100);
     }
 
+    @Subscribe(threadMode = ThreadMode.MAIN)
+    public void onTextSizeChange(TextSizeChangeEvent event) {
+        // Clear all existing scaling and reapply with new size
+        if (mListView != null) {
+            clearFontScalingTags();
+            applyFontScalingToPreferences(mListView);
+        }
+    }
+
+    private void clearFontScalingTags() {
+        if (mListView == null) return;
+
+        // Clear tags from all visible items
+        for (int i = 0; i < mListView.getChildCount(); i++) {
+            View child = mListView.getChildAt(i);
+            clearTagsRecursively(child);
+        }
+    }
+
+    private void clearTagsRecursively(View view) {
+        if (view == null) return;
+
+        // Clear the scaling tags
+        view.setTag(R.id.font_scaled_tag, null);
+        view.setTag(R.id.original_text_size_tag, null);
+
+        // Reset text size to original if it's a TextView
+        if (view instanceof TextView) {
+            TextView textView = (TextView) view;
+            Object originalSize = textView.getTag(R.id.original_text_size_tag);
+            if (originalSize instanceof Float) {
+                textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, (Float) originalSize);
+            }
+        }
+
+        // Recursively clear children
+        if (view instanceof ViewGroup) {
+            ViewGroup viewGroup = (ViewGroup) view;
+            for (int i = 0; i < viewGroup.getChildCount(); i++) {
+                clearTagsRecursively(viewGroup.getChildAt(i));
+            }
+        }
+    }
+
     private void applyFontScalingToView(View view) {
         if (view == null) return;