Help with android studio

[monoloco]

Hello everyone, can someone help me with this problem, I am trying to make an application in android studio, using the example that is on the page, but when trying to run the application I get the following error, I think it is an error library, but I think I installed it correctly.

[jdecoux]

It looks as though you have a null pointer exception on ch1. You need to create the object before you can use it:

Code: Select all

ch1 = new VoltageInput();