Support any number of overlay packages. Support any target package.
UPDATED PACKAGE MATCHING
------------------------
In Runtime resource overlay, iteration 1, only a single overlay package
was considered. Package matching was based on file paths:
/vendor/overlay/system/framework-res.apk corresponded to
/system/framework-res.apk. Introduce a more flexible matching scheme
where any package is an overlay package if its manifest includes
<overlay targetPackage="com.target.package"/>
For security reasons, an overlay package must fulfill certain criteria
to take effect: see below.
THE IDMAP TOOL AND IDMAP FILES
------------------------------
Idmap files are created by the 'idmap' binary; idmap files must be
present when loading packages. For the Android system, Zygote calls
'idmap' as part of the resource pre-loading. For application packages,
'idmap' is invoked via 'installd' during package installation (similar
to 'dexopt').
UPDATED FLOW
------------
The following is an outline of the start-up sequences for the Android
system and Android apps. Steps marked with '+' are introduced by this
commit.
Zygote initialization
Initial AssetManager object created
+ idmap --scan creates idmaps for overlays targeting 'android', \
stores list of overlays in /data/resource-cache/overlays.list
AssetManager caches framework-res.apk
+ AssetManager caches overlay packages listed in overlays.list
Android boot
New AssetManager's ResTable acquired
AssetManager re-uses cached framework-res.apk
+ AssetManager re-uses cached 'android' overlays (if any)
App boot
ActivityThread prepares AssetManager to load app.apk
+ ActivityThread prepares AssetManager to load app overlays (if any)
New AssetManager's ResTable acquired as per Android boot
SECURITY
--------
Overlay packages are required to be pre-loaded (in /vendor/overlay).
These packages are trusted by definition. A future iteration of runtime
resource overlay may add support for downloaded overlays, which would
likely require target and overlay signatures match for the overlay to
be trusted.
LOOKUP PRIORITY
---------------
During resource lookup, packages are sequentially queried to provide a
best match, given the constraints of the current configuration. If any
package provide a better match than what has been found so far, it
replaces the previous match. The target package is always queried last.
When loading a package with more than one overlay, the order in which
the overlays are added become significant if several packages overlay
the same resource.
Had downloaded overlays been supported, the install time could have been
used to determine the load order. Regardless, for pre-installed
overlays, the install time is randomly determined by the order in which
the Package Manager locates the packages during initial boot. To support
a well-defined order, pre-installed overlay packages are expected to
define an additional 'priority' attribute in their <overlay> tags:
<overlay targetPackage="com.target.package" priority="1234"/>
Pre-installed overlays are loaded in order of their priority attributes,
sorted in ascending order.
Assigning the same priority to several overlays targeting the same base
package leads to undefined behaviour. It is the responsibility of the
vendor to avoid this.
The following example shows the ResTable and PackageGroups after loading
an application and two overlays. The resource lookup framework will
query the packages in the order C, B, A.
+------+------+- -+------+------+
| 0x01 | | ... | | 0x7f |
+------+------+- -+------+------+
| |
"android" Target package A
|
Pre-installed overlay B (priority 1)
|
Pre-installed overlay C (priority 2)
Change-Id: If49c963149369b1957f7d2303b3dd27f669ed24e
Adding a micro theme affects 3 different GIT repositories:
1. Repository 'device/google/clockwork' - https://ar/398971
This has the overlay for the DeviceDefault for ClockWork
2. Repository 'platform/vendor/google_clockwork' - https://ar/399378
This has the changes to Clockwork Home to use the new micro Theme.
3. Repository 'frameworks/base' - https://ar/398959
This adds the *_micro.xml style/theme files.
Change-Id: Ib1e87953b052a9ec2ff0ea11dd0dfe55317442b4
As per 3GPP TS 31.101 Release 11 section 9.6, the number of digits
for UNBLOCK PIN (PUK) is always 8.
Change-Id: I4ea69fd8e2e8e96330d10a67b2d1f5a1859c1016
Add same named operator configuration for 404, 405, and 520.
That is, show roaming icon though same named operators.
Bug: 12121959
Change-Id: I9148bab727170f670fd2679db69b123b0526bb32
(Cherry pick from master)
As a next step they can be moved into separate directories to be
built as separate modules that may or may not be included in a
particular configuration.
Moves AppWidgetService, BackupManagerService, ClipboardService, DevicePolicyMS,
and WallpaperMS.
Change-Id: Idd92871c1828bdde81d85fe99a9c87a22d53169d
Extend wifi display connection timeout.
Show a notification while connecting to wifi display.
Ensure that remote display providers are really trusted before
connecting to them.
Bug: 11257292
Change-Id: Iad0caaa30d7946df818bc75ade071f2e377f8a53
Hide disabled routes from the chooser.
Fix layout of chooser dialog when the settings button is visible and
the list is very long to prevent truncation of the settings button.
Fix an issue when we fake the route connecting status when a route
is selected. The route changed notification needs to be propagated
to apps. Fake it better.
Immediately disconnect from a route when the connection is lost or
a connection attempt fails. Added a few new test displays for this
case.
Bug: 11257292
Change-Id: I360ab5dc937ad60d97592eab54b19f034519645e
Fixed the Preference ordering code to consider the case where
two preferences might have the same order. In that case, it
falls back on the title to disambiguate. Previous behavior was
undefined (and technically not stable).
Expose the wifi display device address.
Perform wifi display scans every 10 seconds instead of every 15
to improve reponsiveness.
Make sure to define routes for wifi displays that we are connecting
to even if they are not yet paired. Simplified the logic for
adding and removing these routes to avoid possibly getting out
of sync and leaving stale routes behind.
Fix wifi display notification icon.
Bug: 11257292
Change-Id: I8ac15fb17d83758c0bdce80399e12723c367b83c
