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Editorial Team
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Asked: 2026-06-16T22:55:51+00:00

I recently bought a Nexus 7 and noticed that the built-in Android Calculator uses

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I recently bought a Nexus 7 and noticed that the built-in Android Calculator uses multi-touch buttons. From what I understand, the only way to do this is to capture all your events in one view and pass them to the sub-views yourself. Like so:

http://www.passsy.de/multitouch-for-all-views/

However, I’ve searched through a few code repositories and cannot see anywhere the Android Calculator is doing such work, which leads me to think there’s an easier way:

http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android-apps/4.1.1_r1/com/android/calculator2/Calculator.java?av=f

Does anyone see how the Android Calculator is implementing multi-touch buttons?

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1 Answer

  1. Editorial Team

    I know this is an old question, but I recently stumbled upon the answer. As zapl pointed out, muliple buttons in a layout can be touched simultaneously, without adding any special code.

    However, my app had a target API of 10 and this did not work. Changing my target API to 15 suddenly worked on my ICS and newer devices. I’m not sure if a target API of Honeycomb(11) would work, but 15+ did.

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