曼谷暴雨序章看到一半切出再切回来崩溃了

曼谷暴雨序章看到一半的时候切出去聊了会QQ，再切回来的时候崩溃了。

错误报告：

java.lang.Error: FATAL EXCEPTION [main] Unity version : 2018.2.0f2 Device model : HUAWEI KNT-AL20 Device fingerprint: HONOR/KNT-AL20/HWKNT:8.0.0/HUAWEIKNT-AL20/528(C00):user/release-keys Caused by: java.lang.RuntimeException: Unable to start receiver com.lvchengyao.liuyanzhentan.notification.UnityNotificationManager: java.lang.IllegalArgumentException: Invalid notification (no valid small icon): Notification(channel=null pri=0 contentView=null vibrate=[1000,1000] sound=content://settings/system/notification_sound tick defaults=0x0 flags=0x10 color=0x00000000 vis=PRIVATE) at android.app.ActivityThread.handleReceiver(ActivityThread.java:3705) at android.app.ActivityThread.-wrap18(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1979) at android.os.Handler.dispatchMessage(Handler.java:108) at android.os.Looper.loop(Looper.java:166) at android.app.ActivityThread.main(ActivityThread.java:7425) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921) at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:108) Caused by: java.lang.IllegalArgumentException: Invalid notification (no valid small icon): Notification(channel=null pri=0 contentView=null vibrate=[1000,1000] sound=content://settings/system/notification_sound tick defaults=0x0 flags=0x10 color=0x00000000 vis=PRIVATE) at android.app.NotificationManager.notifyAsUser(NotificationManager.java:312) at android.app.NotificationManager.notify(NotificationManager.java:300) at android.app.NotificationManager.notify(NotificationManager.java:284) at com.lvchengyao.liuyanzhentan.notification.UnityNotificationManager.onReceive(UnityNotificationManager.java:217) at android.app.ActivityThread.handleReceiver(ActivityThread.java:3695) ... 9 more