Use audio_session from pub.dev.

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019-2020 Ryan Heise.
+Copyright (c) 2019-2020 Ryan Heise and the project contributors.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

example/pubspec.lock

@@ -11,9 +11,9 @@ packages:
   audio_session:
     dependency: "direct main"
     description:
-      path: "../../audio_session"
-      relative: true
-    source: path
+      name: audio_session
+      url: "https://pub.dartlang.org"
+    source: hosted
     version: "0.0.1"
   boolean_selector:
     dependency: transitive

example/pubspec.yaml

@@ -7,8 +7,7 @@ environment:
   flutter: ">=1.12.8 <2.0.0"
 
 dependencies:
-  audio_session:
-    path: ../../audio_session
+  audio_session: ^0.0.1
   flutter:
     sdk: flutter
 

lib/just_audio.dart

@@ -532,13 +532,18 @@ class AudioPlayer {
   /// [stop] playback on completion, you can call either method as soon as
   /// [processingState] becomes [ProcessingState.completed] by listening to
   /// [processingStateStream].
+  ///
+  /// This method activates the audio session before playback, and will do
+  /// nothing if activation of the audio session fails for any reason.
   Future<void> play() async {
     if (playing) return;
     _playInterrupted = false;
+    final audioSession = await AudioSession.instance;
+    if (await audioSession.setActive(true)) {
       _playingSubject.add(true);
-    await AudioSession.ensurePrepared(ensureActive: true);
       await _invokeMethod('play');
     }
+  }
 
   /// Pauses the currently playing media. This method does nothing if
   /// ![playing].

pubspec.lock

@@ -11,9 +11,9 @@ packages:
   audio_session:
     dependency: "direct main"
     description:
-      path: "../audio_session"
-      relative: true
-    source: path
+      name: audio_session
+      url: "https://pub.dartlang.org"
+    source: hosted
     version: "0.0.1"
   boolean_selector:
     dependency: transitive

pubspec.yaml

@@ -8,8 +8,7 @@ environment:
   flutter: ">=1.12.8 <2.0.0"
 
 dependencies:
-  audio_session:
-    path: ../audio_session
+  audio_session: ^0.0.1
   rxdart: ^0.24.1
   path: ^1.6.4
   path_provider: ^1.6.10