Android 10 java.lang.SecurityException：不允许使用前台服务删除频道 MyNotificationChannel

Question

我从线程创建通知：

final NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
NotificationChannel chan = new NotificationChannel("MyNotificationChannel","Notification Title", NotificationManager.IMPORTANCE_HIGH);
chan.setSound(null, null);
manager.createNotificationChannel(chan);

final Notification notification =
(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ? new Notification.Builder(context, "MyNotificationChannel") : new Notification.Builder(context))
                                            .setContentTitle(context.getString(R.string.app_name))
                                            .setContentText("Text")
                                            .setSmallIcon(R.drawable.logo)
                                            .setFullScreenIntent(PendingIntent.getActivity(context, 0, myIntent, PendingIntent.FLAG_UPDATE_CURRENT), true)
                                            .setCategory(Notification.CATEGORY_ALARM)
                                            .setVisibility(Notification.VISIBILITY_PUBLIC)
                                            .setOngoing(true)
                                            .build();

((Service) context).startForeground(12345678, notification);

当我尝试在活动销毁时删除该通知时，它适用于大多数设备，但在某些摩托罗拉设备或搭载 Android 10 的小米设备上：

protected void onDestroy() {
  try {

    NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    mNotificationManager.cancel(12345678);
    mNotificationManager.deleteNotificationChannel("MyNotificationChannel");
  }catch(Exception e){
    e.printStackTrace();
  }
}

此异常已通过，并且通知未删除，我尝试在线程中删除并进入另一个活动：

java.lang.SecurityException: Not allowed to delete channel "MyNotificationChannel" with a foreground service

Answer 1

其他地方也有类似的帖子。对我有用的是，我使用 try catch 环绕块巧妙地捕获了异常并继续前进。最佳做法是在 FG 服务正在使用该频道时不要删除该频道，或者在继续删除该频道之前停止该服务

Answer 2

经过多次测试，我找到了解决方案。 我将其添加到 AndroidManifest.xml 中：

<uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
<uses-permission android:name="android.permission.REORDER_TASKS" />

服务中：

boolean locked = false;
KeyguardManager myKM = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
if( myKM.inKeyguardRestrictedInputMode()) {
    locked = true;
}

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && locked) {
    final NotificationManager manager =
            (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    try {
        manager.cancel(12345678);
    }catch(Exception e){
        e.printStackTrace();
    }

    NotificationChannel chan;
    final NotificationManager manager =
                                    (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    String channel = "MyNotificationChannel";
    chan = manager.getNotificationChannel(channel);
    if (chan == null){
        chan = new NotificationChannel(
                channel,
                "Notification Title",
                NotificationManager.IMPORTANCE_HIGH);
        chan.setSound(null, null);  // Service manages its own sound.
        chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
        manager.createNotificationChannel(chan);
    }
    PendingIntent pending = PendingIntent.getActivity(context, 0, myIntent, PendingIntent.FLAG_ONE_SHOT);
    final Notification notification =
            (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ?
                    new Notification.Builder(context, channel) :
                    new Notification.Builder(context))
                    .setContentTitle(context.getString(R.string.app_name))
                    .setContentText("Notification text")
                    .setSmallIcon(R.drawable.log_trans_mini)
                    .setFullScreenIntent(pending, true)
                    .setContentIntent(pending)
                    .setCategory(Notification.CATEGORY_ALARM)
                    .setAutoCancel(true)
                    .setPriority(Notification.PRIORITY_MAX)
                    .setVisibility(Notification.VISIBILITY_PUBLIC)
                    .setOngoing(true)
                    .setLights(Color.WHITE, 1000, 1000)
                    .build();
    ((Service) context).startForeground(12345678, notification);
} else {
    context.startActivity(myIntent);
}

接下来需要做的是尽可能删除设备中的频道，因为现在在您收到通知后该频道始终存在。在 moto g6 中我仍然无法删除频道，但会显示通知。

Answer 3

允许删除 mp3 果汁下载上的频道