java.lang.RuntimeException: Unable to start activity ComponentInfo{com.greenbergc.mysecondapp/com.greenbergc.mysecondapp.DisplayMessageActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.CharSequence android.support.v7.widget.Toolbar.getTitle()' on a null object reference

codegur.us | 10 months ago
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    samebug tip
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    Stack Overflow | 2 years ago | Malik
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.greenbergc.mysecondapp/com.greenbergc.mysecondapp.DisplayMessageActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.CharSequence android.support.v7.widget.Toolbar.getTitle()' on a null object reference
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    codegur.net | 1 year ago
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.greenbergc.mysecondapp/com.greenbergc.mysecondapp.DisplayMessageActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.CharSequence android.support.v7.widget.Toolbar.getTitle()' on a null object reference
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    codegur.us | 10 months ago
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.greenbergc.mysecondapp/com.greenbergc.mysecondapp.DisplayMessageActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.CharSequence android.support.v7.widget.Toolbar.getTitle()' on a null object reference
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Root Cause Analysis

  1. java.lang.RuntimeException

    Unable to start activity ComponentInfo{com.greenbergc.mysecondapp/com.greenbergc.mysecondapp.DisplayMessageActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.CharSequence android.support.v7.widget.Toolbar.getTitle()' on a null object reference

    at android.app.ActivityThread.performLaunchActivity()
  2. Android Platform
    ActivityThread.main
    1. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2693)
    2. android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2758)
    3. android.app.ActivityThread.access$900(ActivityThread.java:177)
    4. android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
    5. android.os.Handler.dispatchMessage(Handler.java:102)
    6. android.os.Looper.loop(Looper.java:145)
    7. android.app.ActivityThread.main(ActivityThread.java:5942)
    7 frames
  3. Java RT
    Method.invoke
    1. java.lang.reflect.Method.invoke(Native Method)
    2. java.lang.reflect.Method.invoke(Method.java:372)
    2 frames
  4. Android
    ZygoteInit.main
    1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
    2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
    2 frames