question: static boolean verifyZipFile ( File file ) { try { ZipFile zipFile = new ZipFile ( file ) ; try { zipFile . close ( ) ; return true ; } catch ( IOException e ) { Log . w ( TAG , "Failed to close zip file: " + file . getAbsolutePath ( ) ) ; } } catch ( ZipException ex ) { Log . w ( TAG , "File " + file . getAbsolutePath ( ) + " is not a valid zip file." , ex ) ; } catch ( IOException ex ) { Log . w ( TAG , "Got an IOException trying to open zip file: " + file . getAbsolutePath ( ) , ex ) ; } return false ; }
target:  Returns whether the file is a valid zip file.