[PyJNIus] NotificationCompat class not found

[Hazhir]

I'm trying to create a sticky notification with playback controls on Android for my media player app (Plyer can only send simple notifications that have no controls). I've followed the Android documentation, but it seems like the NotificationCompat class or maybe all packages of the androidx namespace are not available to me.

Following the Creat a Notification I added the support library to my gradle dependencies:

buildozer.spec:

android.gradle_dependencies = "com.android.support:support-compat:28.0.0"

But when I run the code below, I get this error: 

jnius.jnius.JavaException: Class not found b'androidx/core/app/NotificationCompat'

Here's my code (this code probably has other issues and I'm trying to solve them one at a time):

import random

import string

from kivy.logger import Logger

from jnius import autoclass

from android import api_version

Logger.debug('SERVICE: Execution started.')

# Given a media session and its context (usually the component containing the session)

# Create a NotificationCompat.Builder

# Get the session's metadata

RDrawable = autoclass('android.R$drawable')

RString = autoclass('android.R$string')

NotificationCompat = autoclass("androidx.core.app.NotificationCompat")

MediaButtonReceiverBuilder = autoclass('androidx.media.session.MediaButtonReceiver$buildMediaButtonPendingIntent')

MediaSession = autoclass('android.media.session.MediaSession')

NotificationCompatAction = autoclass("androidx.core.app.NotificationCompat$Action")

NotificationCompatBuilder = autoclass("androidx.core.app.NotificationCompat$Builder")

PlaybackStateCompat = autoclass("android.support.v4.media.session.PlaybackStateCompat")

NotificationManager = autoclass("android.app.NotificationManager")

PythonActivity = autoclass('org.kivy.android.PythonActivity')

NotificationChannel = autoclass('android.app.NotificationChannel')

# service = autoclass('org.kivy.android.PythonService').mService

service = autoclass('org.allerter.geniustmusicplayer.ServiceMyservice').mService

mediaSession = MediaSession()

controller = mediaSession.getController()

mediaMetadata = controller.getMetadata()

description = mediaMetadata.getDescription()

app_context = service.getApplication().getApplicationContext()

if api_version >= 26:

    channel_id = ''.join(random.choices(string.ascii_letters, k=10))

    channel_name = 'GTPlayer'

    channel_importance = NotificationManager.IMPORTANCE_DEFAULT

    channel = NotificationChannel(channel_id, channel_name, channel_importance)

    channel.setDescription('GeniusT Music Player')

    NotificationManagerClass = autoclass('android.app.NotificationManager.class')

    notificationManager = service.getSystemService(NotificationManagerClass)

    notificationManager.createNotificationChannel(channel)

    builder = NotificationCompatBuilder(app_context, channel_id)

else:

    builder = NotificationCompatBuilder(app_context)

IconDrawable = autoclass("{}.R$drawable".format(service.getPackageName()))

icon = getattr(IconDrawable, 'icon')

(builder

    # Add the metadata for the currently playing track

    .setContentTitle('Song Name')

    .setContentText('Song Artist')

    .setSubText('Song')

    .setLargeIcon(icon)

    # Enable launching the player by clicking the notification

    .setContentIntent(controller.getSessionActivity())

    # Stop the service when the notification is swiped away

    # .setDeleteIntent(MediaButtonReceiver.buildMediaButtonPendingIntent(

    #    context,

    #    PlaybackStateCompat.ACTION_STOP))

    # Make the transport controls visible on the lockscreen

    .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)

    # Add an app icon and set its accent color

    # Be careful about the color

    .setSmallIcon(icon)

    # .setColor(ContextCompat.getColor(context, R.color.primaryDark))

 )

# Add a pause button

pause_intent = MediaButtonReceiverBuilder(

    app_context,

    PlaybackStateCompat.ACTION_PLAY_PAUSE

)

action = NotificationCompatAction(

    RDrawable.pause, 'Pause',  # getString(R.string.pause),

    pause_intent

)

builder.addAction(action)

# Take advantage of MediaStyle features

# .setStyle(new MediaStyle()

#          .setMediaSession(mediaSession.getSessionToken())

#          .setShowActionsInCompactView(0)

#          # Add a cancel button

#          .setShowCancelButton(true)

#          .setCancelButtonIntent(MediaButtonReceiver.buildMediaButtonPendingIntent(

#          context,

#          PlaybackStateCompat.ACTION_STOP)))

# Display the notification and place the service in the foreground

service.startForeground(1, builder.build())

[planckp...@gmail.com]

Yes, p4a does not support androidx.

I have a PR to add androidx support  https://github.com/kivy/python-for-android/pull/2385

(I have been using androidx, plan for today make small change to PR....)