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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T15:54:26+00:00 2026-05-26T15:54:26+00:00

This is my first attempt at an Android app. I’m targeting Android 4/Ice Cream

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This is my first attempt at an Android app. I’m targeting Android 4/Ice Cream Sandwich.

When trying to run the app, I get the err msg “R cannot be resolved to a variable” on this line:

setContentView(R.layout.main);

Yet main.xml IS there, below \res\layout\ as it should be.

What might the problem be with this as-yet as-minimal-as-possible app (the only code it has so far has been auto-generated)?

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  1. Editorial Team
    Editorial Team
    2026-05-26T15:54:27+00:00Added an answer on May 26, 2026 at 3:54 pm

    “R cannot be resolved to a variable” comes when:
    a)you mismatch your sdk version
    B) there are errors on any of your layouts, which makes the auto-generated R files not to be created
    C) Other issues are usually solved by cleaning the project

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