In Android 11, inattentive sleep is a power-saving feature
that allows a user inactivity timeout to be set after which the screen turns off, even
if windows with
are visible or wakelocks of level
Wakelocks with level
PARTIAL_WAKE_LOCK are not affected by this feature.
Shortly before the timeout expires, a message can be shown that warns
the user that the device will go to sleep if they don't interact with the device.
In this context, user activity refers to anything that triggers a call to
PowerManager#userActivity (without the
flag), including but not limited to:
- Interacting with the touchscreen
- Pressing a physical button
- Input events from an external accessory (for example, connected keyboard, bluetooth remote, IR remote)
- Voice interaction
- Receiving certain HDMI CEC messages, such as One Touch Play
- Starting a new cast session
If the feature is enabled, the device shows an onscreen warning after a specified time of user inactivity. If no action is taken, the screen turns off. You can customize the feature using these configuration options.
Configuring the timeout
To configure the timeout, update the following element in
- Specifies the default time in milliseconds of user inactivity after which the screen turns off (even if screen wakelocks are in place).
- Set at build time.
- If the value is between
config_minimumScreenOffTimeout, the timeout is set to
config_minimumScreenOffTimeoutto prevent the device from turning off its screen shortly after waking up.
-1, which disables this feature.
Overriding the default timeout
To override the default timeout setting, update the following element.
- If set, overrides the default inattentive sleep timeout set by
- Can be set at runtime.
Configuring the duration before warning appears
To configure the duration, update the following element in
- How long to show a warning message to the user before the screen turns off after prolonged user inactivity.
- The value should be well below the set inattentive sleep timeout, otherwise the warning dialog shows constantly and can't be dismissed.
Showing the timeout preferences in TvSettings
To show the timeout preferences, update the following element in
- Whether to show a preference item for allowing turning the screen off during media playback.
Resources for the warning UI
- The layout of the warning dialog is defined in
- The following strings for the dialog are defined in
The build time configurations and resources can be changed by resource overlays.
Enable the feature using the following.
- Override the default
- If using the AOSP
- Disable the feature in settings by
- Implement your own settings
The CTS tests for the feature are at
Examples and source
frameworks/base/packages/SystemUI/src/com/android/systemui/power/InattentiveSleepWarningView.javacontains the default warning UI implementation.
packages/apps/TvSettingsprovides an example of how to expose the feature in settings.
Manual test case example
Make sure the
stay_on_while_plugged_indeveloper setting is off if the device's health HAL reports that the device has a battery (
true) as this might prevent the feature from turning off the screen.
adb shell settings put global stay_on_while_plugged_in 0
- Set an inattentive sleep timeout to be a few seconds more than the warning dialog duration.
adb shell settings put secure attentive_timeout 32000
- Start playing back a video (to acquire a screen wakelock).
- Verify that the sleep warning dialog appears after a few seconds.
- Verify that the screen turns off after the set timeout expires.