Unhandled Exception: PlatformException(NullPointerException, java.lang.NullPointerException

[MR-MaoJiu]

E/flutter ( 6529): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(NullPointerException, java.lang.NullPointerException: Attempt to invoke virtual method 'long io.flutter.plugins.videoplayer.VideoPlayer.getPosition()' on a null object reference, Cause: null, Stacktrace: java.lang.NullPointerException: Attempt to invoke virtual method 'long io.flutter.plugins.videoplayer.VideoPlayer.getPosition()' on a null object reference
E/flutter ( 6529): at io.flutter.plugins.videoplayer.VideoPlayerPlugin.position(VideoPlayerPlugin.java:192)
E/flutter ( 6529): at io.flutter.plugins.videoplayer.Messages$AndroidVideoPlayerApi$-CC.lambda$setup$7(Messages.java:845)
E/flutter ( 6529): at io.flutter.plugins.videoplayer.-$$Lambda$Messages$AndroidVideoPlayerApi$Hyw3NPJif481snyP8XO6eCRPxX8.onMessage(Unknown Source:2)
E/flutter ( 6529): at io.flutter.plugin.common.BasicMessageChannel$IncomingMessageHandler.onMessage(BasicMessageChannel.java:217)
E/flutter ( 6529): at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:295)
E/flutter ( 6529): at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$DartMessenger(DartMessenger.java:319)
E/flutter ( 6529): at io.flutter.embedding.engine.dart.-$$Lambda$DartMessenger$TsixYUB5E6FpKhMtCSQVHKE89gQ.run(Unknown Source:12)
E/flutter ( 6529): at android.os.Handler.handleCallback(Handler.java:883)
E/flutter ( 6529): at android.os.Handler.dispatchMessage(Handler.java:100)
E/flutter ( 6529): at android.os.Looper.loop(Looper.java:237)
E/flutter ( 6529): at android.app.ActivityThread.main(ActivityThread.java:7830)
E/flutter ( 6529): at java.lang.reflect.Method.invoke(Native Method)
E/flutter ( 6529): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
E/flutter ( 6529): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1040)
E/flutter ( 6529): , null)
E/flutter ( 6529): #0 AndroidVideoPlayerApi.position (package:video_player_android/src/messages.g.dart:452:7)
E/flutter ( 6529):
E/flutter ( 6529): #1 AndroidVideoPlayer.getPosition (package:video_player_android/src/android_video_player.dart:116:9)
E/flutter ( 6529):
E/flutter ( 6529): #2 VideoPlayerController._applyPlayPause. (package:video_player/video_player.dart:496:41)
E/flutter ( 6529):