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Editorial Team
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Asked: 2026-06-13T06:14:33+00:00

Got a Play Store crash report (hooray). The stack trace lists an NPE occurring

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Got a Play Store crash report (hooray). The stack trace lists an NPE occurring in MyActivity#d(), inside of MyAtivity#onCreate(). Is this a compiler-generated method? I sure didn’t write it!

Caused by: java.lang.NullPointerException
at com.example.MyActivity.d(Unknown Source)
at com.example.MyActivity.onCreate(Unknown Source)
at android.app.Activity.performCreate(Activity.java:5008)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)

Thanks in advance!

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1 Answer

  1. Editorial Team

    You probably did run pro guard (the Google obfuscation) when you made the build.
    Look for a file called mapping.txt it will give you the real name of the d() method.

    mapping.txt:
    Lists the mapping between the original and obfuscated class, method, and field names. This file is important when you receive a bug report from a release build, because it translates the obfuscated stack trace back to the original class, method, and member names.

    Look here for more.

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