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Editorial Team
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Asked: 2026-05-27T15:14:48+00:00

12-20 13:52:15.071: D/AndroidRuntime(278): Shutting down VM 12-20 13:52:15.081: W/dalvikvm(278): threadid=1: thread exiting with uncaught

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12-20 13:52:15.071: D/AndroidRuntime(278): Shutting down VM
12-20 13:52:15.081: W/dalvikvm(278): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
12-20 13:52:15.100: E/AndroidRuntime(278): FATAL EXCEPTION: main
12-20 13:52:15.100: E/AndroidRuntime(278): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ebonybutler.cexample3/com.ebonybutler.cexample3.Main}: java.lang.NullPointerException
12-20 13:52:15.100: E/AndroidRuntime(278):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
12-20 13:52:15.100: E/AndroidRuntime(278):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-20 13:52:15.100: E/AndroidRuntime(278):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-20 13:52:15.100: E/AndroidRuntime(278):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-20 13:52:15.100: E/AndroidRuntime(278):  at android.os.Handler.dispatchMessage(Handler.java:99)
12-20 13:52:15.100: E/AndroidRuntime(278):  at android.os.Looper.loop(Looper.java:123)
12-20 13:52:15.100: E/AndroidRuntime(278):  at android.app.ActivityThread.main(ActivityThread.java:4627)
12-20 13:52:15.100: E/AndroidRuntime(278):  at java.lang.reflect.Method.invokeNative(Native Method)
12-20 13:52:15.100: E/AndroidRuntime(278):  at java.lang.reflect.Method.invoke(Method.java:521)
12-20 13:52:15.100: E/AndroidRuntime(278):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-20 13:52:15.100: E/AndroidRuntime(278):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-20 13:52:15.100: E/AndroidRuntime(278):  at dalvik.system.NativeStart.main(Native Method)
12-20 13:52:15.100: E/AndroidRuntime(278): Caused by: java.lang.NullPointerException
12-20 13:52:15.100: E/AndroidRuntime(278):  at com.ebonybutler.cexample3.Main.onCreate(Main.java:21)
12-20 13:52:15.100: E/AndroidRuntime(278):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-20 13:52:15.100: E/AndroidRuntime(278):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-20 13:52:15.100: E/AndroidRuntime(278):  ... 11 moreenter code here
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1 Answer

  1. Editorial Team

    These lines here:

    12-20 13:52:15.100: E/AndroidRuntime(278): Caused by: java.lang.NullPointerException
12-20 13:52:15.100: E/AndroidRuntime(278):  at com.ebonybutler.cexample3.Main.onCreate(Main.java:21)

    suggest that something being used on line 21 of cexample3.Main.onCreate is null, so the code can’t continue to execute.

    I suggest placing a breakpoint above that line, then debugging to see what object is supposed to be available there. Then you can drill down to finding why that object isn’t available (for example, maybe it wasn’t initialized properly, or perhaps it has gone out of scope by that point).

    Added:
    Based on your comment above

    Hi guys, this is what is on line 21:b.setOnClickListener(new OnClickListener() – user1026229

    it looks like the object represented with the variable ‘b’ (b.setOnClickListener…) probably is null. If so, next step is to find out why…

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