Android 8.0 Oreo - Kivy notify example app - No useable implementation found

[caffeinatedMike]

I'm trying to run the notification example kivy app on my Android 8.0 Galaxy S7 Edge (Pydroid3), but keep getting the error saying no implementation found. Below is the full traceback.

[INFO   ] [Logger      ] Record log in /storage/emulated/0/downloads/notification test/.kivy/logs/kivy_21-02-13_2.txt
[INFO   ] [Kivy        ] v1.11.1
[INFO   ] [Kivy        ] Installed at "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/kivy/__init__.py"
[INFO   ] [Python      ] v3.8.3 (default, May 27 2020, 02:08:17) 
[GCC 9.3.0]
[INFO   ] [Python      ] Interpreter at "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/bin/python3"
[INFO   ] [Factory     ] 184 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil, img_gif (img_ffpyplayer ignored)
[INFO   ] [Window      ] Provider: sdl2
[INFO   ] [GL          ] Using the "OpenGL ES 2" graphics system
[INFO   ] [GL          ] Backend used <sdl2>
[INFO   ] [GL          ] OpenGL version <b'OpenGL ES 3.2 V@269.0 (GIT@1b7798b, I8a9bdcf8d3) (Date:03/15/18)'>
[INFO   ] [GL          ] OpenGL vendor <b'Qualcomm'>
[INFO   ] [GL          ] OpenGL renderer <b'Adreno (TM) 530'>
[INFO   ] [GL          ] OpenGL parsed version: 3, 2
[INFO   ] [GL          ] Texture max size <16384>
[INFO   ] [GL          ] Texture max units <16>
[INFO   ] [Window      ] auto add sdl2 input provider
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked
[INFO   ] [Text        ] Provider: sdl2
[INFO   ] [GL          ] NPOT texture support is available
[WARNING] [Base        ] Unknown <android> provider
[INFO   ] [Base        ] Start application main loop
 Traceback (most recent call last):
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/plyer/utils.py", line 93, in _ensure_obj
     mod = __import__(module, fromlist='.')
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/plyer/platforms/android/notification.py", line 29, in <module>
     Drawable = autoclass("{}.R$drawable".format(activity.getPackageName()))
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/jnius/reflect.py", line 208, in autoclass
     c = find_javaclass(clsname)
   File "jnius/jnius_export_func.pxi", line 28, in jnius.jnius.find_javaclass
 jnius.jnius.JavaException: Class not found b'ru/iiec/pydroid3/R$drawable'
[INFO   ] [Base        ] Leaving application in progress...
 Traceback (most recent call last):
   File "/storage/emulated/0/downloads/notification test/main.py", line 44, in <module>
     NotificationDemoApp().run()
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/kivy/app.py", line 855, in run
     runTouchApp()
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/kivy/base.py", line 504, in runTouchApp
     EventLoop.window.mainloop()
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/kivy/core/window/window_sdl2.py", line 747, in mainloop
     self._mainloop()
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/kivy/core/window/window_sdl2.py", line 479, in _mainloop
     EventLoop.idle()
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/kivy/base.py", line 342, in idle
     self.dispatch_input()
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/kivy/base.py", line 327, in dispatch_input
     post_dispatch_input(*pop(0))
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/kivy/base.py", line 293, in post_dispatch_input
     wid.dispatch('on_touch_up', me)
   File "kivy/_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/kivy/uix/behaviors/button.py", line 179, in on_touch_up
     self.dispatch('on_release')
   File "kivy/_event.pyx", line 703, in kivy._event.EventDispatcher.dispatch
   File "kivy/_event.pyx", line 1214, in kivy._event.EventObservers.dispatch
   File "kivy/_event.pyx", line 1098, in kivy._event.EventObservers._dispatch
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/kivy/lang/builder.py", line 64, in custom_callback
     exec(__kvlang__.co_value, idmap)
   File "/storage/emulated/0/downloads/notification test/notificationdemo.kv", line 27, in <module>
     on_release: root.do_notify(mode='normal')
   File "/storage/emulated/0/downloads/notification test/main.py", line 32, in do_notify
     notification.notify(**kwargs)
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/plyer/facades/notification.py", line 79, in notify
     self._notify(
   File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.8/site-packages/plyer/facades/notification.py", line 88, in _notify
     raise NotImplementedError("No usable implementation found!")
 NotImplementedError: No usable implementation found!

[rdb]

I believe this may have been addressed by #669, since plyer no longer relies on a hardcoded icon resource name, so the exception in question should no longer occur.

[Julian-O]

Closing as fixed.

If the problem persists, please let us know.