Android Error in an XML file: aborting build.
This Error is related to one or more XML files :
i.e. one of AndroidManifest.xml, dimens.xml, strings.xml, styles.xml, activity_main.xml or any other xml file that you have added to the project workspace.
Check for errors in these files in res folder, or AndroidManifest.xml : You will see a red cross next to a file indicating that there is an error
Also check that xml files name does not contain any Uppercase letter, number or special symbols other than underscores.