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ViewDragHelper.getTouchSlop（）上的NullPointerException

我有一个问题，一个奇怪的问题，我无法复制，但是我看到很多用户都存在该问题。坠机事故由Crashlitycs捕获。问题是：

致命异常：java.lang.NullPointerException尝试在空对象引用上调用虚拟方法'int android.support.v4.widget.ViewDragHelper.getTouchSlop（）'

目前，我已将支持库设置为28.0.0。

我不知道下一步该怎么做，因为我不知道此错误来自何处，并且无法复制它

final SUPPORT_LIBRARY_VERSION = '28.0.0'

// Support
implementation "com.android.support:design:$SUPPORT_LIBRARY_VERSION"
implementation "com.android.support:appcompat-v7:$SUPPORT_LIBRARY_VERSION"
implementation "com.android.support:cardview-v7:$SUPPORT_LIBRARY_VERSION"
implementation "com.android.support:recyclerview-v7:$SUPPORT_LIBRARY_VERSION"
implementation 'com.android.support.constraint:constraint-layout:1.1.1'
implementation "com.android.support:exifinterface:$SUPPORT_LIBRARY_VERSION"
implementation "com.android.support:support-media-compat:$SUPPORT_LIBRARY_VERSION"
implementation "com.android.support:support-v4:$SUPPORT_LIBRARY_VERSION"
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这是我的Logcat

       at android.support.design.widget.BottomSheetBehavior.onTouchEvent(BottomSheetBehavior.java:350)
       at android.support.design.widget.CoordinatorLayout.performIntercept(CoordinatorLayout.java:476)
       at android.support.design.widget.CoordinatorLayout.onTouchEvent(CoordinatorLayout.java:527)
       at android.view.View.dispatchTouchEvent(View.java:9390)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2549)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2240)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254) …
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java android nullpointerexception

Cos*_*scu
2019 06-10
5
推荐指数
1
解决办法
100
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