When I open flutter screen from native android code second time face null pointer exception in OpenFilePlugin.java 400

[kaushalgosaliya5]

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'io.flutter.plugin.common.BinaryMessenger io.flutter.embedding.engine.plugins.FlutterPlugin$FlutterPluginBinding.getBinaryMessenger()' on a null object reference at com.crazecoder.openfile.OpenFilePlugin.onAttachedToActivity(OpenFilePlugin.java:400) at io.flutter.embedding.engine.FlutterEngineConnectionRegistry.attachToActivityInternal(FlutterEngineConnectionRegistry.java:351) at io.flutter.embedding.engine.FlutterEngineConnectionRegistry.attachToActivity(FlutterEngineConnectionRegistry.java:324) at io.flutter.embedding.android.FlutterActivityAndFragmentDelegate.onAttach(FlutterActivityAndFragmentDelegate.java:189) at io.flutter.embedding.android.FlutterActivity.onCreate(FlutterActivity.java:498) at com.tatadigital.tcp.flutter_embed.NeuFlutterActivity.onCreate(NeuFlutterActivity.kt:22) at android.app.Activity.performCreate(Activity.java:7802) at android.app.Activity.performCreate(Activity.java:7791) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)  at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)  at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)  at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)  at android.os.Handler.dispatchMessage(Handler.java:107)  at android.os.Looper.loop(Looper.java:214)  at android.app.ActivityThread.main(ActivityThread.java:7356)