Struggling with opening damn epub file after generation on android

blog2epub/blog2epub_gui.py

@@ -566,15 +566,14 @@ def save_settings(self):
     def popup_success(self, ebook: Book):
         self.success(ebook)
 
-    def _open_ebook_in_default_viewer(self, file_full_path, inst):
-        print("===LOL===")
+    @mainthread
+    def _open_epub(self, file_full_path, inst):
         file_path_urlencoded = urllib.parse.quote(file_full_path)
         self.interface.print(f"Opening file: {file_full_path} ({platform})")
         if platform == "win":
             os.startfile(file_path_urlencoded)  # type: ignore
         elif platform == "android":
-            pass
-            # webbrowser.open(f"file://{file_path_urlencoded}")
+            webbrowser.open(f"file:/{file_path_urlencoded}")
         else:
             opener = "open" if sys.platform == "osx" else "xdg-open"
             subprocess.call([opener, file_path_urlencoded])
@@ -606,9 +605,7 @@ def success(self, ebook: Book):
                 font_size=sp(16),
                 font_name=UI_FONT_NAME,
                 size_hint=(0.5, 1),
-                on_press=partial(
-                    self._open_ebook_in_default_viewer, ebook.file_full_path
-                ),
+                on_press=partial(self._open_epub, ebook.file_full_path),
             )
         )
         success_content.add_widget(buttons_row)

buildozer.spec

@@ -96,7 +96,7 @@ fullscreen = 0
 # (list) Permissions
 # (See https://python-for-android.readthedocs.io/en/latest/buildoptions/#build-options-1 for all the supported syntaxes and properties)
 # android.permissions = android.permission.INTERNET, (name=android.permission.WRITE_EXTERNAL_STORAGE;maxSdkVersion=18)
-android.permissions = android.permission.INTERNET, android.permission.READ_EXTERNAL_STORAGE, android.permission.WRITE_EXTERNAL_STORAGE
+android.permissions = android.permission.INTERNET, android.permission.READ_EXTERNAL_STORAGE, android.permission.WRITE_EXTERNAL_STORAGE, android.permission.FLAG_GRANT_READ_URI_PERMISSION
 
 # (list) features (adds uses-feature -tags to manifest)
 #android.features = android.hardware.usb.host
@@ -108,7 +108,7 @@ android.permissions = android.permission.INTERNET, android.permission.READ_EXTER
 #android.minapi = 21
 
 # (int) Android SDK version to use
-#android.sdk = 20
+android.sdk = 20
 
 # (str) Android NDK version to use
 #android.ndk = 23b