java - Red X Mark in android studio application while running -


screenshot

i wish if 1 can me in android studio problem?

i came while working on application have no idea whatsoever since tried possible solution can resolve issues.

any appreciated.

the red x there saying cannot build/run project. because had error while indexing application. error happens when open project. needs index code again. couple things can remove this:

  1. go gradle file, delete something, , type back. ask "refresh" project.
  2. you may try cleaning , rebuilding project.
  3. basically, reloading code should fix problem. if can find way refresh project, can try use way too.

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