PowerManager.OnThermalHeadroomChangedListener
public
static
interface
PowerManager.OnThermalHeadroomChangedListener
android.os.PowerManager.OnThermalHeadroomChangedListener |
Listener passed to
PowerManager.addThermalHeadroomListener
and
PowerManager.removeThermalHeadroomListener
to notify caller of Thermal headroom or thresholds changes.
Summary
Public methods | |
---|---|
abstract
void
|
onThermalHeadroomChanged(float headroom, float forecastHeadroom, int forecastSeconds, Map<Integer, Float> thresholds)
Called when overall thermal headroom or headroom thresholds have significantly changed that requires action. |
Public methods
onThermalHeadroomChanged
public abstract void onThermalHeadroomChanged (float headroom, float forecastHeadroom, int forecastSeconds, Map<Integer, Float> thresholds)
Called when overall thermal headroom or headroom thresholds have significantly changed that requires action.
This may not be used to fully replace the PowerManager.getThermalHeadroom(int)
API as it will
only notify on one of the conditions below that will significantly change one or both
values of current headroom and headroom thresholds since previous callback:
1. thermal throttling events: when the skin temperature has cross any of the thresholds
and there isn't a previous callback in a short time ago with similar values.
2. skin temperature threshold change events: note that if the absolute °C threshold
values change in a way that does not significantly change the current headroom nor
headroom thresholds, it will not trigger any callback. The client should not
need to take action in such case since the difference from temperature vs threshold
hasn't changed.
By API version 36, it provides a forecast in the same call for developer's convenience
based on a forecastSeconds
defined by the device, which can be static or dynamic
varied by OEM. Be aware that it will not notify on forecast temperature change but the
events mentioned above. So periodically polling against PowerManager.getThermalHeadroom(int)
API should still be used to actively monitor temperature forecast in advance.
This serves as a more advanced option compared to thermal status listener, where the latter will only notify on thermal throttling events with status update.
Parameters | |
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headroom |
float : current headroom
Value is 0f or greater |
forecastHeadroom |
float : forecasted headroom in future
Value is 0f or greater |
forecastSeconds |
int : how many seconds in the future used in forecast
Value is 0 or greater |
thresholds |
Map : new headroom thresholds, see PowerManager.getThermalHeadroomThresholds()
This value cannot be null . |