java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setAlpha(float)' on a null object reference

GitHub | dhruvalpatel18 | 2 months ago
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  1. 0

    Null pointer exception (Set Alpha)

    GitHub | 2 months ago | dhruvalpatel18
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setAlpha(float)' on a null object reference
  2. 0

    Crash on 2.3.6

    GitHub | 3 years ago | pietmau
    java.lang.ClassCastException: android.view.ViewRoot
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  4. 0

    GitHub comment 9#119220583

    GitHub | 2 years ago | cjgehinscott
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bah.is.esd.zoneapp/com.bah.is.esd.zoneapp.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setAlpha(float)' on a null object reference
  5. 0

    Not able to run code

    GitHub | 2 years ago | DannyBoy32
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.kmshack.newstand/com.kmshack.newsstand.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setAlpha(float)' on a null object reference
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Root Cause Analysis

  1. java.lang.NullPointerException

    Attempt to invoke virtual method 'void android.view.View.setAlpha(float)' on a null object reference

    at com.nineoldandroids.view.ViewHelper$Honeycomb.setAlpha()
  2. Nine Old Androids
    ViewHelper.setAlpha
    1. com.nineoldandroids.view.ViewHelper$Honeycomb.setAlpha(ViewHelper.java:185)
    2. com.nineoldandroids.view.ViewHelper.setAlpha(ViewHelper.java:19)
    2 frames
  3. com.daimajia.androidanimations
    YoYo$AnimationComposer.playOn
    1. com.daimajia.androidanimations.library.BaseViewAnimator.reset(BaseViewAnimator.java:60)
    2. com.daimajia.androidanimations.library.BaseViewAnimator.animate(BaseViewAnimator.java:49)
    3. com.daimajia.androidanimations.library.YoYo.play(YoYo.java:152)
    4. com.daimajia.androidanimations.library.YoYo.access$900(YoYo.java:36)
    5. com.daimajia.androidanimations.library.YoYo$AnimationComposer.playOn(YoYo.java:106)
    5 frames
  4. com.handm.dhruval
    MainActivity$2.onDrawerOpened
    1. com.handm.dhruval.earthquakenews.ui.MainActivity$2.onDrawerOpened(MainActivity.java:109)
    1 frame
  5. Android Support v4
    ViewDragHelper$2.run
    1. android.support.v4.widget.DrawerLayout.dispatchOnDrawerOpened(DrawerLayout.java:875)
    2. android.support.v4.widget.DrawerLayout.updateDrawerState(DrawerLayout.java:820)
    3. android.support.v4.widget.DrawerLayout$ViewDragCallback.onViewDragStateChanged(DrawerLayout.java:2085)
    4. android.support.v4.widget.ViewDragHelper.setDragState(ViewDragHelper.java:881)
    5. android.support.v4.widget.ViewDragHelper$2.run(ViewDragHelper.java:338)
    5 frames
  6. Android Platform
    ActivityThread.main
    1. android.os.Handler.handleCallback(Handler.java:739)
    2. android.os.Handler.dispatchMessage(Handler.java:95)
    3. android.os.Looper.loop(Looper.java:148)
    4. android.app.ActivityThread.main(ActivityThread.java:5417)
    4 frames
  7. Java RT
    Method.invoke
    1. java.lang.reflect.Method.invoke(Native Method)
    1 frame
  8. Android
    ZygoteInit.main
    1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
    2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
    2 frames