[轉]Android app has error: Execution failed task':app:preDexDebug' trying to test parse but can't run app with this error

https://teamtreehouse.com/forum/android-app-has-error-execution-failed-taskapppredexdebug-trying-to-test-parse-but-cant-run-app-with-this-error

http://stackoverflow.com/questions/25529155/android-studio-gradle-error-predexdebug



Try this : File ----> Invalidate caches/restart