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Suddenly, android studio "Cannot Resolve Method/symbol".What to do?

After starting the application, suddenly everywhere red text is appearing in my code telling me that android studio cannot resolve several methods and symbols, such as startActivity, ActionBarActivity etc. I have tried cleaning the project and syncing the project with the gradle files. I am a complete noob in Android Studio and am making my first app. What to do?

1 Answer


At first glance it looks like something might have gotten erased in your import statements. Could you try optimizing your imports? This can be done with the shortcut on Windows and Linux of CTRL - ALT - O (the letter O). If this doesn't work, could you post your code so that we can assist you further?