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16-Mar-2017 |
Todd Lee <leetodd@google.com> |
OEM single-build/multi-SKU via dynamic RRO support
The purpose here is to provide support for selectively
enabling Runtime Resource Overlays (RROs) (specifically
those pertaining to a specific SKU, within a OEM's "single
build" covering multiple SKUs) at boot based on the value
of a pre-defined system property.
This mechanism is designed to be compatible with other,
recent changes to Runtime Resource Overlays - specifically:
- has no effect on 'isStatic'. Resource overlays must be
attributed as static in order to qualify for loading into
the system_server. The 'requiredSystemPropertyName/
requiredSystemPropertyValue' mechanism operates
independent of this and can be used on both static and
non static overlays. The effect of specifying a conditional
property on any overlay is that it will ONLY be enabled
in the event that the system reflects both the property
and the specified value (Note that in the ABSENCE of a
conditional property, overlays are assumed to be enabled).
- has no effect on OverlayManagerService (OMS) API. The
OMS provides the system with an interface through which
overlays can be enabled/disabled and even rearranged at
runtime. This provides the basis of support for various
user-level features (e.g. dynamic theme selection).
The 'requiredSystemPropertyName/requiredSystemPropertyValue'
mechanism operates independent of this -
with enablement being completely coupled to the available
system properties on the device and NOT subject to change
at runtime.
Note: as part of this change, original overlay tests have been
updated (fixed) and expanded to include tests to cover the
conditional property implementation.
Issue: http://b/35100249
Test: frameworks/base/core/tests/overlaytests/testrunner.py
Change-Id: I1990ce21a27a385db1e2f53294b69dd03988351e
/frameworks/base/core/tests/overlaytests/OverlayAppFiltered/Android.mk
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