[Fix|Android] Support follow system nightmode flag in widget viewer (#318)

* Add custom PdfViewCtrlTabHostFragment2 to support follow system night mode

* Updating package version

* Updating package version

* Missed bracket

* Update host fragment

* Update host fragment

* apply theme after onCreate

* Updating pubspec.yaml

* Updating package version

* Reorder apply theme

* Updating pubspec.yaml

* Updating package version

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: brandenfung2

android/src/main/java/com/pdftron/pdftronflutter/nativeviews/FlutterPdfViewCtrlTabHostFragment.java

@@ -1,8 +1,22 @@
 package com.pdftron.pdftronflutter.nativeviews;
 
+import android.os.Bundle;
+import androidx.fragment.app.FragmentActivity;
+
 import com.pdftron.pdf.controls.PdfViewCtrlTabHostFragment2;
 
 public class FlutterPdfViewCtrlTabHostFragment extends PdfViewCtrlTabHostFragment2 {
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        FragmentActivity activity = getActivity();
+        if (activity != null) {
+            applyTheme(activity);
+        }
+
+        super.onCreate(savedInstanceState);
+    }
+
     @Override
     protected void updateFullScreenModeLayout() {
         if (isInFullScreenMode()) {

android/src/main/java/com/pdftron/pdftronflutter/views/DocumentView.java

@@ -21,7 +21,6 @@
 import com.pdftron.pdf.controls.PdfViewCtrlTabFragment2;
 import com.pdftron.pdf.controls.PdfViewCtrlTabHostFragment2;
 import com.pdftron.pdf.tools.ToolManager;
-import com.pdftron.pdf.utils.PdfViewCtrlSettingsManager;
 import com.pdftron.pdf.utils.Utils;
 import com.pdftron.pdftronflutter.R;
 import com.pdftron.pdftronflutter.helpers.PluginUtils;
@@ -324,11 +323,11 @@ public boolean isAutoSaveEnabled() {
         return mAutoSaveEnabled;
     }
 
-    public boolean isAnnotationManagerEnabled() { return mAnnotationManagerEnabled; };
+    public boolean isAnnotationManagerEnabled() { return mAnnotationManagerEnabled; }
 
-    public String getUserId() { return mUserId; };
+    public String getUserId() { return mUserId; }
 
-    public String getUserName() { return mUserName; };
+    public String getUserName() { return mUserName; }
 
     public boolean isUseStylusAsPen() {
         return mUseStylusAsPen;

pubspec.yaml

@@ -1,6 +1,6 @@
 name: pdftron_flutter
 description: A convenience wrapper to build Flutter apps that use the PDFTron mobile SDK for smooth, flexible, and stand-alone document viewing.
-version: 1.0.1-27
+version: 1.0.1-28
 homepage: https://www.pdftron.com
 repository: https://github.com/PDFTron/pdftron-flutter
 issue_tracker: https://github.com/PDFTron/pdftron-flutter/issues