java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.CharSequence android.support.v7.widget.Toolbar.getTitle()' on a null object reference

Stack Overflow | jonlee83 | 2 years ago
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    bighow.org | 11 months ago
    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(ActivityThread.java:2298) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) at android.app.ActivityThread.access$800(ActivityThread.java:144) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
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    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.NullPointerException

      Attempt to invoke virtual method 'java.lang.CharSequence android.support.v7.widget.Toolbar.getTitle()' on a null object reference

      at android.support.v7.internal.widget.ToolbarWidgetWrapper.<init>()
    2. Android v7
      ToolbarWidgetWrapper.<init>
      1. android.support.v7.internal.widget.ToolbarWidgetWrapper.<init>(ToolbarWidgetWrapper.java:95)
      2. android.support.v7.internal.widget.ToolbarWidgetWrapper.<init>(ToolbarWidgetWrapper.java:88)
      2 frames
    3. android.support.v7
      ToolbarActionBar.<init>
      1. android.support.v7.internal.app.ToolbarActionBar.<init>(ToolbarActionBar.java:84)
      1 frame
    4. Android v7
      ActionBarActivity.setSupportActionBar
      1. android.support.v7.app.ActionBarActivityDelegateBase.setSupportActionBar(ActionBarActivityDelegateBase.java:175)
      2. android.support.v7.app.ActionBarActivity.setSupportActionBar(ActionBarActivity.java:92)
      2 frames
    5. com.lee.yuchan
      Trans_List.onCreate
      1. com.lee.yuchan.splt.Trans_List.onCreate(Trans_List.java:72)
      1 frame
    6. Android Platform
      ActivityThread.main
      1. android.app.Activity.performCreate(Activity.java:5933)
      2. android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
      3. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
      4. android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
      5. android.app.ActivityThread.access$800(ActivityThread.java:144)
      6. android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
      7. android.os.Handler.dispatchMessage(Handler.java:102)
      8. android.os.Looper.loop(Looper.java:135)
      9. android.app.ActivityThread.main(ActivityThread.java:5221)
      9 frames
    7. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      2. java.lang.reflect.Method.invoke(Method.java:372)
      2 frames
    8. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
      2 frames