（4.3.2.20）在activity中的子线程中startActivity异常dispatchCancelPendingInputEvents()' on a null object referen

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本文探讨了Android开发中遇到的尝试调用空View对象的方法所引发的异常问题，并提出了解决方案，即通过Handler确保UI操作在主线程中执行。

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Exception: Attempt to invoke virtual method 'void android.view.View.dispatchCancelPendingInputEvents()' on a null object reference
android.view.ViewGroup.dispatchCancelPendingInputEvents(ViewGroup.java:3523)
android.view.ViewGroup.dispatchCancelPendingInputEvents(ViewGroup.java:3523)
android.view.ViewGroup.dispatchCancelPendingInputEvents(ViewGroup.java:3523)
android.view.ViewGroup.dispatchCancelPendingInputEvents(ViewGroup.java:3523)
android.view.ViewGroup.dispatchCancelPendingInputEvents(ViewGroup.java:3523)
android.view.ViewGroup.dispatchCancelPendingInputEvents(ViewGroup.java:3523)
android.view.View.cancelPendingInputEvents(View.java:13503)
android.app.Activity.startActivityForResult(Activity.java:3801)
android.app.Activity.startActivityForResult(Activity.java:3740)
android.app.Activity.startActivity(Activity.java:4050)
android.app.Activity.startActivity(Activity.java:4018)
com.trustmobi.mixin.app.ui.base.BaseActivityMessage.checkGuestLock(BaseActivityMessage.java:375)
com.trustmobi.mixin.app.ui.base.BaseActivityMessage$1.run(BaseActivityMessage.java:311)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
java.lang.Thread.run(Thread.java:818)