Flutter local notification custom sound doesn't work (path issue)

问题

I want setting up a custom sound for my local notification in the Android side. I created a raw folder in the res folder of Android project. This is the part of my code which I put my alarm.mp3 file path in the notification.

var androidPlatformChannelSpecifics =
                    new AndroidNotificationDetails(
                        "$id",
                        not.columnValue + not.deveui,
                        not.columnValue + not.deveui,
                        sound: "@raw/alarm",
                        importance: Importance.Max,
                        priority: Priority.High);

Actually it still sounds with the default system sound.

If I put @raw/alarm.mp3, I got the following exception: Unhandled Exception: PlatformException(INVALID_SOUND, The resource %s could not be found. Please make sure it has been added as a raw resource to your Android head project., null)

回答1:

You don't need to put '@raw/' to path, plugin is already taking sounds from it (according to plugin source: FlutterLocalNotificationsPlugin.java function retrieveSoundResourceUri) so remove it.

also check that sound file is included in build, ex. by creating keep.xml in raw folder with following content

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:tools="http://schemas.android.com/tools"
    tools:keep="@drawable/*,@raw/alarm" />

that might help

来源：https://stackoverflow.com/questions/59783904/flutter-local-notification-custom-sound-doesnt-work-path-issue