326e35ffaf
AAPT2 Macros are compile-time resources definitions that are expanded when referenced during the link phase. A macro must be defined in the res/values.xml directory. A macro definition for a macro named "foo" looks like the following: <macro name="foo">contents</macro> When "@macro/foo" is used in the res/values directory or in a compiled XML file, the contents of the macro replace the macro reference and then the substituted contents are compiled and linked. If the macro contents reference xml namespaces from its original definition, the namespaces of the original macro definition will be used to determine which package is being referenced. Macros can be used anywhere resources can be referenced using the @package:type/entry syntax. Macros are not included in the final resource table or the R.java since they are not actual resources. Bug: 175616308 Test: aapt2_tests Change-Id: I48b29ab6564357b32b4b4e32bff7ef06036382bc