日志：

java.lang.RuntimeException: Unable to resume activity {com.baitu.poppo/com.idlefish.flutterboost.containers.FlutterBoostActivity}: java.lang.NullPointerException: Attempt to invoke interface method 'android.app.Activity io.flutter.embedding.android.FlutterActivityAndFragmentDelegate$Host.getActivity()' on a null object reference
        at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4323)
        at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4355)
        at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:52)
        at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2110)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7697)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:516)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)

不知道是什么原因引起的，流程是按照文档的步骤接入的 @0xZOne