java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.lang.reflect.Constructor.newInstance(java.lang.Object[])' on a null object reference

[FranPR9]

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[FranPR9]

hi, my activity is unable to start because an error inflating the stepperlayout.
It started yesterday sep/24/2019. today sep/25/2019 I have 2019.

this is the log of the error;
Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.lang.reflect.Constructor.newInstance(java.lang.Object[])' on a null object reference
at androidx.core.graphics.TypefaceCompatApi21Impl.newFamily + 116(TypefaceCompatApi21Impl.java:116)
at androidx.core.graphics.TypefaceCompatApi21Impl.createFromFontFamilyFilesResourceEntry + 176(TypefaceCompatApi21Impl.java:176)
at androidx.core.graphics.TypefaceCompat.createFromResourcesFamilyXml + 116(TypefaceCompat.java:116)
at androidx.core.content.res.ResourcesCompat.loadFont + 415(ResourcesCompat.java:415)
at androidx.core.content.res.ResourcesCompat.loadFont + 361(ResourcesCompat.java:361)
at androidx.core.content.res.ResourcesCompat.getFont + 339(ResourcesCompat.java:339)
at androidx.appcompat.widget.TintTypedArray.getFont + 119(TintTypedArray.java:119)
at androidx.appcompat.widget.AppCompatTextHelper.updateTypefaceAndStyle + 265(AppCompatTextHelper.java:265)
at androidx.appcompat.widget.AppCompatTextHelper.loadFromAttributes + 177(AppCompatTextHelper.java:177)
at androidx.appcompat.widget.AppCompatButton. + 77(AppCompatButton.java:77)
at androidx.appcompat.widget.AppCompatButton. + 67(AppCompatButton.java:67)
at androidx.appcompat.app.AppCompatViewInflater.createButton + 187(AppCompatViewInflater.java:187)
at androidx.appcompat.app.AppCompatViewInflater.createView + 110(AppCompatViewInflater.java:110)
at androidx.appcompat.app.AppCompatDelegateImpl.createView + 1266(AppCompatDelegateImpl.java:1266)
at androidx.appcompat.app.AppCompatDelegateImpl.onCreateView + 1316(AppCompatDelegateImpl.java:1316)
at android.view.LayoutInflater.createViewFromTag + 772(LayoutInflater.java:772)
at android.view.LayoutInflater.createViewFromTag + 730(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate + 863(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren + 824(LayoutInflater.java:824)
at android.view.LayoutInflater.rInflate + 866(LayoutInflater.java:866)
at android.view.LayoutInflater.inflate + 489(LayoutInflater.java:489)
at java.lang.reflect.Method.invoke(Method)
at java.lang.reflect.Method.invoke(Method)
at java.lang.reflect.Method.invoke(Method)
at android.view.LayoutInflater.inflate + 423(LayoutInflater.java:423)
at com.stepstone.stepper.StepperLayout.init + 746(StepperLayout.java:746)
at com.stepstone.stepper.StepperLayout. + 292(StepperLayout.java:292)
at java.lang.reflect.Constructor.newInstance0(Constructor.java)
at java.lang.reflect.Constructor.newInstance + 334(Constructor.java:334)
at android.view.LayoutInflater.createView + 647(LayoutInflater.java:647)
at android.view.LayoutInflater.createViewFromTag + 790(LayoutInflater.java:790)
at android.view.LayoutInflater.createViewFromTag + 730(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate + 863(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren + 824(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate + 515(LayoutInflater.java:515)
at java.lang.reflect.Method.invoke(Method)
at java.lang.reflect.Method.invoke(Method)
at java.lang.reflect.Method.invoke(Method)
at android.view.LayoutInflater.inflate + 423(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate + 374(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView + 469(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView + 140(AppCompatActivity.java:140)
at androidx.databinding.DataBindingUtil.setContentView + 303(DataBindingUtil.java:303)
at androidx.databinding.DataBindingUtil.setContentView + 284(DataBindingUtil.java:284)
at mx.weex.appwallet.activity.RegisterActivity.onCreate + 99(RegisterActivity.java:99)
at android.app.Activity.performCreate + 7025(Activity.java:7025)
at android.app.Activity.performCreate + 7016(Activity.java:7016)
at android.app.Instrumentation.callActivityOnCreate + 1217(Instrumentation.java:1217)
at android.app.ActivityThread.performLaunchActivity + 2812(ActivityThread.java:2812)
at android.app.ActivityThread.handleLaunchActivity + 2955(ActivityThread.java:2955)
at android.app.ActivityThread.-wrap12()
at android.app.ActivityThread$H.handleMessage + 1650(ActivityThread.java:1650)
at android.os.Handler.dispatchMessage + 106(Handler.java:106)
at android.os.Looper.loop + 164(Looper.java:164)
at android.app.ActivityThread.main + 6747(ActivityThread.java:6747)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run + 455(RuntimeInit.java:455)
at com.android.internal.os.ZygoteInit.main + 807(ZygoteInit.java:807)
at java.lang.reflect.Method.invoke(Method)

[FranPR9]

Does this error has to do with androidX??

[FranPR9]

I have this version in my gradle:
com.stepstone.stepper:material-stepper:4.3.1

[felixdivo]

Does this error has to do with androidX??

It generally works with AndroidX in my App

[abhivinny]

I have this version in my gradle:
com.stepstone.stepper:material-stepper:4.3.1

Did you find the reason?

[FranPR9]

Not really, I implemented my own.