我使用的是 ScrollView 里面 Fragment. 我已经测试了我的应用程序在不同的设备上，应用程序是工作正常。但在Fabric中，我得到这个崩溃的一些设备上有 Android version 9.0.
崩溃日志。
Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.VelocityTracker.clear()' on a null object reference
at android.widget.ScrollView.onTouchEvent(ScrollView.java:695)
at android.view.View.dispatchTouchEvent(View.java:12513)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3024)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2705)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:453)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1830)
at android.app.Activity.dispatchTouchEvent(Activity.java:3402)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:411)
at android.view.View.dispatchPointerEvent(View.java:12752)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5307)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4962)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4465)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4518)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4484)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4624)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4492)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4681)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4465)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4518)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4484)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4492)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4465)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7301)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7270)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7231)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7404)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:187)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(InputEventReceiver.java)
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:178)
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:7375)
at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:7427)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1004)
at android.view.Choreographer.doCallbacks(Choreographer.java:816)
at android.view.Choreographer.doFrame(Choreographer.java:745)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:990)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6723)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:495)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:859)
我很困惑，是否因为这个问题 ScrollView 在 Android 9 还是我的错。希望能得到帮助。
编辑。
我的XML文件
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorWhite"
android:fillViewport="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentBottom="true"
android:gravity="center|bottom"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Space
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
<com.facebook.shimmer.ShimmerFrameLayout
android:id="@+id/shimmer_view_container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="6"
app:shimmer_base_alpha="1"
app:shimmer_duration="300"
app:shimmer_fixed_width="100dp"
app:shimmer_highlight_alpha="0.5"
app:shimmer_repeat_delay="2000">
<com.google.android.material.button.MaterialButton
android:id="@+id/btn_start"
style="@style/Widget.MaterialComponents.Button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/start"
android:textColor="@android:color/white"
app:backgroundTint="@color/colorAccent" />
</com.facebook.shimmer.ShimmerFrameLayout>
<Space
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
<TextView
android:id="@+id/privacy_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAlignment="center"
android:textColor="@android:color/darker_gray"
android:textColorLink="@color/colorRed"
android:textSize="10sp" />
</LinearLayout>
</RelativeLayout>
</ScrollView>
和设备上，我得到了崩溃。
所有的安卓版本都是9.0，没有root，这就是fabric在崩溃报告中的显示。