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A working source code of a simple demo of AWS Lambda for Android Phone could be found at:


(1) The above code runs good on the real android phone.

(2) Running on the Android Emulator, I always got the error:

final LambdaFunctionsInterface myInterface =;

Method threw ‘java.lang.UnsupportedOperationException’ exception. Cannot evaluate $Proxy0.toString()

then it crashed the app in the emulator. what could be wrong?

Get the MD5 sigature for AWS Application console ( Android Settings)

keytool-list-printcert-jarfile app.apk


Useful references:

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