it found this: https://gigablast.com/search?c=main&qlangcountry=en-us&q=how+to+resolve+missing+symbol+r+android https://gigablast.com/search?c=main&qlangcountry

it found this: https://gigablast.com/search?c=main&qlangcountry=en-us&q=how+to+resolve+missing+symbol+r+android https://gigablast.com/search?c=main&qlangcountry=en-us&q=how... Which is definitely a good sign of a competent search engine.