java - How to find particular code in AVS Sample App Library -

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i trying find piece of java code in avs sample app library ( https://github.com/alexa/alexa-avs-sample-app ), want change little bit.

what happens when run alexa java client is, windows pops , can control alexa it. enter image description here

i want connect hw button rpi , change code when press hw button, same action performed if pressed "tap speak alexa" button.

any ideas how achieve this? not skilled in java if knew look, learn proper stuff.





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