相关疑难解决方法(0)

什么是空指针异常(java.lang.NullPointerException)以及它们的原因是什么？

可以使用哪些方法/工具来确定原因,以便停止异常导致程序过早终止？

我的应用程序一直在通过各种Android版本很好地哼唱.我有用户在Android 4.3,5.0,5.1和6.0上运行它没有任何问题.但是,使用S7 Edge的用户刚刚使用Android 7.0进行了更新,当文本粘贴到EditText字段时,应用程序崩溃(这是您使用此应用程序的第一个也是唯一的事情 - 它开始将文本粘贴到一个框中,然后应用程序解析文本).

我已经查看了Null Pointer Exceptions上的许多线程,我查看了Editor.java的源代码,但没有什么是显而易见的.下面的堆栈跟踪显示我的代码没有问题.他们用7.0改变了什么可能导致这个？

java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.widget.Editor$SelectionModifierCursorController.isDragAcceleratorActive()' on a null object reference
at android.widget.Editor.updateFloatingToolbarVisibility(Editor.java:1520)
at android.widget.Editor.onTouchEvent(Editor.java:1475)
at android.widget.TextView.onTouchEvent(TextView.java:10024)
at android.view.View.dispatchTouchEvent(View.java:10725)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2865)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2550)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2865)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2550)
at android.widget.ScrollView.dispatchTouchEvent(ScrollView.java:738)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2865)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2550)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2865)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2550)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2865)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2550)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:505)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1863)
at android.app.Activity.dispatchTouchEvent(Activity.java:3226)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:467)
at android.view.View.dispatchPointerEvent(View.java:10954)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5051)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4908)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4439)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4492)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4458)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4591)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4466)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4648)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4439) …