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in Java by (3.9k points)

There is an issue with the Android appcompat v7 library on Samsung devices running Android 4.2. I keep getting crashes with the following stack trace in my Developer Console:

java.lang.NoClassDefFoundError: android.support.v7.internal.view.menu.MenuBuilder

    at android.support.v7.widget.PopupMenu.<init>(PopupMenu.java:66)

    at com.[my-package-name].CustomActivity$5.onClick(CustomActivity.java:215)

    at android.view.View.performClick(View.java:4222)

    at android.view.View$PerformClick.run(View.java:17620)

    at android.os.Handler.handleCallback(Handler.java:800)

    at android.os.Handler.dispatchMessage(Handler.java:100)

    at android.os.Looper.loop(Looper.java:194)

    at android.app.ActivityThread.main(ActivityThread.java:5391)

    at java.lang.reflect.Method.invokeNative(Native Method)

    at java.lang.reflect.Method.invoke(Method.java:525)

    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)

    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)

    at dalvik.system.NativeStart.main(Native Method)

This is line 215 of CustomActivity.java:

PopupMenu popup = new PopupMenu(CustomActivity.this, mImageViewMenu);

The crashes come from an array of devices, but always Samsung, and always Android 4.2.

A quick web search leads me to believe that many people have the same issue, some of the steps I have tried to solve the issue are:

  • Check the Android project properties, make sure the appcompat library is added properly.
  • Check the Java Build Path Order and Export project properties, make sure Android Dependencies and Android Private Libraries is checked.
  • Confirm the class is included in the library (android.support.v7.internal.view.menu.MenuBuilder).
  • Confirm R.java is located in gen directory for android.support.v7.appcompat.
  • Confirm the AppCompat theme is included in the Manifest.xml activity.
  • Clean and rebuild project.

Despite these steps, and despite it working on all other devices and Android versions the crash reports still come through.

1 Answer

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by (46.1k points)

As #150 from google groups said

Because careful with -keep class !android.support.v7.internal.view.menu.**. There are a number of classes in there which are referenced from the appcompat's resources.

The better solution is add the following lines instead:

-keep class !android.support.v7.internal.view.menu.*MenuBuilder*, android.support.v7.** { *; }

-keep interface android.support.v7.** { *; }

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