Random error in Android Studio 'R'

Question

I opened the project now, that I 've been working on for past few weeks. And all of a sudden R seems as an error, and is underlined with red. R as in:

 `setContentView(R.layout.activity_quotes2);`

What is the best possible fix and what is causing this?

Try to rebuild the project. Build->Rebuild. Does it compile? Can you run it? — Marija Milosevic, Sep 07 '15 at 17:46
Yes , it fixed the issue. But, why a sudden error. Is that a problem with Android studio? Or anything wrong from my side :( ? — OBX, Sep 07 '15 at 17:49
Android studio probably hadn't synced the gradle files, happends. — Kenneth, Sep 07 '15 at 17:49
possible duplicate of [R cannot be resolved - Android error](http://stackoverflow.com/questions/885009/r-cannot-be-resolved-android-error) — George, Sep 07 '15 at 17:51

score 2 · Accepted Answer · answered Sep 07 '15 at 18:00

2

Try to rebuild the project. Build->Rebuild.

answered Sep 07 '15 at 18:00

Marija Milosevic

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score 1 · Answer 2 · answered Sep 07 '15 at 17:52

1

Re-build the project.

This happens quite commonly in Android Studio. I'm not sure when the bug will be fixed because it's been this way for a long time now.

answered Sep 07 '15 at 17:52

adao7000

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score 0 · Answer 3 · answered Sep 07 '15 at 17:58

0

You need check all layouts in your project. In some place you has and error or You can check the SDK installed in your computer. Try update.

answered Sep 07 '15 at 17:58

Josué H.

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Random error in Android Studio 'R'

3 Answers3