NPE

[4ntoine]

Got NPE reported by crashlytics:

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.VelocityTracker.computeCurrentVelocity(int, float)' on a null object reference
       at android.support.v4.view.ViewPager.endFakeDrag(ViewPager.java:2395)
       at com.viewpagerindicator.TitlePageIndicator.onTouchEvent(TitlePageIndicator.java:615)
       at android.view.View.dispatchTouchEvent(View.java:9993)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2799)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2799)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2799)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2799)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2799)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2799)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2799)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2799)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2799)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at com.android.internal.policy.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2831)
       at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1863)
       at android.app.Activity.dispatchTouchEvent(Activity.java:3046)
       at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:60)
       at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:60)
       at com.android.internal.policy.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2792)
       at android.view.View.dispatchPointerEvent(View.java:10228)
       at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5344)
       at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5180)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4620)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4673)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4639)
       at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4781)
       at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4647)
       at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4838)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4620)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4673)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4639)
       at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4647)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4620)
       at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7306)
       at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7184)
       at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7145)
       at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7416)
       at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
       at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
       at android.os.MessageQueue.next(MessageQueue.java:323)
       at android.os.Looper.loop(Looper.java:143)
       at android.app.ActivityThread.main(ActivityThread.java:7224)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

[rakeshcusat]

Even my Crashlytics account reported similar problem. I stated noticing this exception a lot lately.

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.VelocityTracker.addMovement(android.view.MotionEvent)' on a null object reference
       at android.support.v4.view.ViewPager.fakeDragBy(SourceFile:2542)
       at com.viewpagerindicator.CirclePageIndicator.onTouchEvent(SourceFile:310)
       at android.view.View.dispatchTouchEvent(View.java:9998)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2871)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.widget.ScrollView.dispatchTouchEvent(ScrollView.java:645)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2839)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2514)
       at com.android.internal.policy.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2816)
       at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1848)
       at android.app.Activity.dispatchTouchEvent(Activity.java:3046)
       at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(SourceFile:60)
       at com.android.internal.policy.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2777)
       at android.view.View.dispatchPointerEvent(View.java:10233)
       at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5397)
       at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5233)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4673)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4726)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4692)
       at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4834)
       at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4700)
       at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4891)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4673)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4726)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4692)
       at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4700)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4673)
       at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7359)
       at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7237)
       at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7198)
       at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7469)
       at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
       at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
       at android.os.MessageQueue.next(MessageQueue.java:323)
       at android.os.Looper.loop(Looper.java:143)
       at android.app.ActivityThread.main(ActivityThread.java:7229)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

Is there any plan to fix this issue soon because it is affecting a lot of people in production. If we this issue is not fixed recently then I have to replace this component with something else.

[captain-miao]

+1

[hexi]

I have this issue. Any solution?

[devlinsmith]

+1
gradle has:
compile 'com.android.support:appcompat-v7:23.3.0'
compile 'com.mcxiaoke.viewpagerindicator:library:2.4.1@aar'

but I've also found we can now:
compile 'com.github.JakeWharton:ViewPagerIndicator:2.4.1'

Which has min sdk 11 requirement unless you force, which I think may give some issues. For me (need API 9)

Don't understand the full issue, but there is some compatibility thing going on here.

[devlinsmith]

Custom solution, if you aren't worried about the indicators being touchable:
extend CirclePageIndicator
@OverRide
public boolean onTouchEvent(MotionEvent ev) {
return true;
}

[natronite]

We do have the same issue in our apps. What's the status on this?

[lennonpetrick]

I am having the same issue. Did anybody fix this?