v1.0.6
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel unknown, v1.3.2, on Microsoft Windows [Version 10.0.17134.590], locale en-AT)
[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[√] Android Studio (version 3.3)
[√] Connected device (1 available)
• No issues found!
Android - Samsung S8 - Android 9 Pie
Can play remote files..
Cannot play remote files.
Real device.
Try to play any file from remote URL.
I/MediaPlayer(26707): Need to enable context aware info
V/MediaPlayer-JNI(26707): native_setup
I/flutter (26707): error: Exception: Player already stopped.
V/MediaPlayerNative(26707): constructor
V/MediaPlayerNative(26707): setListener
V/MediaHTTPService(26707): MediaHTTPService(android.media.MediaHTTPService@b2558b2): Cookies: null
V/MediaPlayerNative(26707): setVideoSurfaceTexture
V/MediaPlayerNative(26707): prepare
V/MediaHTTPService(26707): makeHTTPConnection: CookieManager created: java.net.CookieManager@b993003
V/MediaHTTPService(26707): makeHTTPConnection(android.media.MediaHTTPService@b2558b2): cookieHandler: java.net.CookieManager@b993003 Cookies: null
D/MediaHTTPConnection(26707): setReadTimeOut = 15000ms
D/NetworkSecurityConfig(26707): Using Network Security Config from resource network_security_config debugBuild: true
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
D/MediaHTTPConnection(26707): setReadTimeout with 15000ms
I/System.out(26707): (HTTPLog)-Static: isSBSettingEnabled false
V/MediaPlayerNative(26707): message received msg=300, ext1=0, ext2=0
V/MediaPlayerNative(26707): Received SEC_MM_PLAYER_CONTEXT_AWARE
V/MediaPlayerNative(26707): callback application
V/MediaPlayerNative(26707): back from callback
V/MediaPlayerNative(26707): message received msg=100, ext1=1, ext2=-2147483648
E/MediaPlayerNative(26707): error (1, -2147483648)
V/MediaPlayerNative(26707): signal application thread
V/MediaPlayerNative(26707): prepare complete - status=1
E/FlutterSoundPlugin(26707): startPlayer() exception
E/flutter (26707): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: Exception: PlatformException(ERR_UNKNOWN, ERR_UNKNOWN, Prepare failed.: status=0x1)
E/flutter (26707): #0 FlutterSound.startPlayer (package:flutter_sound/flutter_sound.dart:163:7)
E/flutter (26707):
It worked fine on S8 with Android 8. Also it works now on other device with Android 8 without any problem.
Same behavior with flutter_sound v1.3.3 .
I don't have Android 9 device currently. Hope you can give us more information through stackoverflow.
Hi. Same is happening when you check it on the emulator.

Starting with Android 9.0 (API level 28), cleartext support is disabled by default.
Because of this, the MediaPlayer was not able to open the provided URL.
Options are to:
set android:usesCleartextTraffic="true" in AndroidManifest.xml
Use HTTPS
Solutions are explained here Android 8: Cleartext HTTP traffic not permitted
Without this change, the plugin is not able to play anything.
@bojanculafic Thanks for the explanation. Could you give us a PR own your finding?
Same here, even using cleartext traffic.
This issue is stale because it has been open 90 days with no activity. Leave a comment or this will be closed in 7 days.
Most helpful comment
Starting with Android 9.0 (API level 28), cleartext support is disabled by default.
Because of this, the MediaPlayer was not able to open the provided URL.
Options are to:
set android:usesCleartextTraffic="true" in AndroidManifest.xml
Use HTTPS
Solutions are explained here Android 8: Cleartext HTTP traffic not permitted
Without this change, the plugin is not able to play anything.