java - 通知自定义声音不适用于某些设备

Question

我的应用程序中有一项服务用于在连接充电器时提醒用户，但问题是自定义声音不适用于某些设备，即使它们都是 Android 8 版本。我的代码:`

    public void notification(Intent intent) {
 int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS,-1);
   
 boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ;

    Intent enterApp_intent = new Intent(getApplicationContext(),MainActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(),0,enterApp_intent,0);

    Bitmap largeIcon = BitmapFactory.decodeResource(getApplicationContext().getResources(),R.drawable.main_icon);

    NotificationCompat.Builder charging_builder = new 

    NotificationCompat.Builder(getApplicationContext());
    charging_builder.setContentTitle("Title");
    charging_builder.setContentText("Content Text");
    charging_builder.setContentIntent(pendingIntent);
    charging_builder.setLargeIcon(largeIcon);
    charging_builder.setSmallIcon(R.drawable.null_shape);
    charging_builder.setDefaults(NotificationManager.IMPORTANCE_MAX);
    charging_builder.setColor(Color.parseColor("#1fd699"));
    charging_builder.setOngoing(false);

    NotificationManager notificationManager = (NotificationManager) getBaseContext().getSystemService(Context.NOTIFICATION_SERVICE);

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){

        AudioAttributes audioAttributes = new AudioAttributes.Builder()
                .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
                .setUsage(AudioAttributes.USAGE_NOTIFICATION)
                .build();

        NotificationChannel charging_notificationChanel = new NotificationChannel("charging_battery","charging battery",
                NotificationManager.IMPORTANCE_DEFAULT);
        charging_notificationChanel.setDescription("Charging notification");
        charging_notificationChanel.setSound(Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE+"://"+getBaseContext().getPackageName()+"/"+
                R.raw.charging_notification),audioAttributes);

        charging_notificationChanel.enableVibration(false);
        charging_notificationChanel.enableLights(true);

        notificationManager.createNotificationChannel(charging_notificationChanel);
        charging_builder.setChannelId("charging_battery");
    }

    if(isCharging){ // charging
        notificationManager.notify(19,charging_builder.build());
    }
}`

通知显示在所有设备但是一些SAMSUNG设备不存在声音？这一切都适用于 API 26。这是为什么？

Answer 1

正如您在 Create and Manage Notification 中看到的那样:如果您以 Android 8.0(API 级别 26)为目标并在未指定通知 channel 的情况下发布通知，则该通知不会出现并且系统会记录错误。

以防万一你可以尝试这个可能你需要将你的 channel ID 添加到 list 中，如下所示:

<meta-data android:name="com.google.firebase.messaging.default_notification_channel_id" android:value="@string/default_notification_channel_id" />