Android：屏幕锁定时，不会显示抬头通知

Question

我正在使用OneSignal android SDK进行推送通知。我们的目标是在屏幕锁定时显示抬头通知。 测试中的设备是具有Android 7.0版本的Samsung S6 Edge

我尝试将Priority设置为10和android_visibility。

还要在“单信号”控制台上设置一个类别，将“重要性”作为“紧急”，将“锁定屏幕”作为“公共”。

byte[] byteArray = Encoding.UTF8.GetBytes("{"
      + "\"app_id\": \"" + appId + "\","
      + "\"headings\": {\"en\": \"" + heading + "\"},"
      + "\"contents\": {\"en\": \"" + message + "\"},"
      + "\"include_player_ids\": [" + deviceIds + "],"
      + "\"priority\":10,"
      + "\"ios_badgeType\":\"Increase\","
      + "\"android_visibility\": 1,"
      + "\"android_channel_id\": \"" + android_channel_id + "\","
      + "\"ios_badgeCount\": 1 }");

锁定屏幕后，手机应亮起并显示提示通知。