java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.Canvas.drawCircle(float, float, float, android.graphics.Paint)' on a null object reference

Stack Overflow | Rifat | 2 weeks ago
  1. 0

    Why showing - tried to access a null object reference even after initializing references in onCreate?

    Stack Overflow | 2 weeks ago | Rifat
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.Canvas.drawCircle(float, float, float, android.graphics.Paint)' on a null object reference
  2. 0

    How do I refer to any object in MainActivity from other class? and how do I avoid NullPointerException for referencing to any object

    Stack Overflow | 1 month ago | Rifat
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
  3. 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
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  5. 0

    change text of textView that is included in activity's xml

    Stack Overflow | 1 year ago | David
    java.lang.RuntimeException: Unable to start activity ComponentInfo{food.foodie.com.foodie/food.foodie.com.foodie.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.facebook.login.widget.LoginButton.registerCallback(com.facebook.CallbackManager, com.facebook.FacebookCallback)' on a null object reference
  6. 0

    יש אפשרות להפוך את זה למשתנה? - FXP

    co.il | 1 year ago
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.Canvas.drawBitmap(android.graphics.Bitmap, float, float, android.graphics.Paint)' on a null object reference

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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void android.graphics.Canvas.drawCircle(float, float, float, android.graphics.Paint)' on a null object reference

      at com.facebook.mahmud.rifat.mahmud.gametester.MainActivity.draw()
    2. com.facebook.mahmud
      MainActivity$1.run
      1. com.facebook.mahmud.rifat.mahmud.gametester.MainActivity.draw(MainActivity.java:84)
      2. com.facebook.mahmud.rifat.mahmud.gametester.MainActivity.access$100(MainActivity.java:11)
      3. com.facebook.mahmud.rifat.mahmud.gametester.MainActivity$1.run(MainActivity.java:63)
      3 frames
    3. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:818)
      1 frame