When packages are removed, remove their associated token mappings in the
packages token data stored in UsageStats. When data is being persisted
to disk, the data for removed packages will not be written to disk.
Additionally, when any of the query APIs are called, data that is read
from disk for which a mapping does not exist will not be returned.
The data deletion uses a lazy techinque to avoid heavy costs of reading
and writing all of the usage stats data on every package removal.
Bug: 135484470
Test: atest IntervalStatsTests
Test: atest UsageStatsDatabaseTest
Change-Id: Ie32d65b47f86071c6a814a8b21e4be060519e598
All of the usage stats data stored on disk will now be obfuscated. There
will be a package to tokens mappings file stored on disk which has a
hierarchy of mappings for each string in each package's usage stats
data. A UsageStatsProtoV2 was added to keep the logic clean and separate
from the original usage stats proto parser.
Initial observations show a memory gain of over 60% w.r.t. the usage
stats data size on disk. There is also no performance hit because of this
change - in fact, even with the obfuscation overhead, reads are now over
65% faster and writes are up to 50% faster.
Bug: 135484470
Test: atest UsageStatsTest
Test: atest UsageStatsDatabaseTest
Test: atest UsageStatsDatabasePerfTest
Change-Id: I55ce729033d8b6e4051271802d57c72684053c32
Now IntervalStats.events field is initialized at construction of
IntervalStats object, we can remove the extra null-check on
IntervalStats.events, make code more clean and readable.
Test: atest UsageStatsDatabaseTest.java
Change-Id: I2580509f41593c1fdf380ba56ebc7a5b6c6f0c5f
1. Add UsageStats Event types:
ACTIVITY_RESUMED is synonym to existing MOVE_TO_FOREGROUND.
ACTIVITY_PAUSED is synonym to existing MOVE_TO_BACKGROUND.
ACTIVITY_STOPPED when an activity becomes invisible on the UI.
2. In UsageStats.java, add API getLastTimeVisible() to report last time the
app is visible (ACTIVITY_RESUMED or ACTIVITY_PAUSED), add API getTotalTimeVisible()
to report total time the app is visible.
The existing API getLastTimeUsed() can report last time the app is in
foreground (AKA have focus).
The existing API getTotalTimeInForeground() can report total time the
app is in foreground (AKA have focus).
3. UsageStats.getTotalTimeVisible() can report screen usage for
split-screen mode and picture-in-picture mode.
4. Because in the same package, activity can be instantiated multiple times,
In UsageEvents.Event class, add a member mInstaceId for activity's
instance ID, add interface getInstanceId() to retrieve the instance ID.
Bug: 112002260
Test: frameworks/base/services/tests/servicestests/src/com/android/server/usage/UsageStatsDatabaseTest.java
atest frameworks/base/core/tests/coretests/src/android/app/usage/UsageStatsTest.java
Change-Id: Ibcef2488e9620804c9f9220b027f976e8fa0c98b
1. Send FOREGROUND_SERVICE_START event when foreground service starts.
Send FOREGROUND_SERVICE_STOP event when foreground service stops.
2. One app can multiple foreground services and multiple services can be
started. Because this, in UsageStats, change mLastForegroundEvent to
className to event map, do this for both activity and foreground
service. Change UsageStatsProto and UsageStatsXmlV1 to support this
change.
3. Add more test cases in UsageStatsTest.java.
Test: start music player which is foreground service, observce these
two events when start play and pause play.
Change-Id: I3dc14f5b73cc114a53b8c51f90d3011d9ace35ac
Bug: 112002260
Test: atest UsageStatsTest#testForegroundService
atest frameworks/base/services/tests/servicestests/src/com/android/server/usage/UsageStatsDatabaseTest.java
atest frameworks/base/core/tests/coretests/src/android/app/usage/UsageStatsTest.java
A suite of simple performance test for UsageStatsDatabase. They measure
the time it take to write and read UsageEvents to and from a file.
Bug: 110428559
Test: atest UsageStatsPerfTests
Change-Id: If1558515e1da9e22fb56bc13f8e89c10c51a1625
