battery_plus_watchos
The watchOS implementation of battery_plus.
Scaffolded with flutter-watchos plugin port
and finished by hand as an FFI implementation over WKInterfaceDevice —
see PORTING_REPORT.md.
Usage
battery_plus does not include a watchOS implementation, so add this
package alongside it:
dependencies:
battery_plus: ^7.1.1
battery_plus_watchos: ^0.1.1
final battery = Battery();
print(await battery.batteryLevel); // 0–100
print(await battery.batteryState); // charging / full / discharging
API coverage
| Member | watchOS |
|---|---|
batteryLevel |
✅ WKInterfaceDevice.batteryLevel (monitoring auto-enabled) |
batteryState |
✅ WKInterfaceDevice.batteryState |
isInBatterySaveMode |
✅ NSProcessInfo.isLowPowerModeEnabled (watchOS 9+, else false) |
onBatteryStateChanged |
✅ poll-based — watchOS has no battery-change notification, so the stream polls every BatteryPlusWatchos.pollInterval (default 2s) and emits on change |
Example on the watch screen
The example is battery_plus's own example app, kept verbatim. It is
designed for a phone and overflows a watch screen at native density, so the
example's runner opts into the flutter-watchos content scale
(watchos/Runner/Info.plist):
<key>FlutterWatchOSContentScale</key>
<real>0.4</real>
The app lays out in a logical space 2.5 times the screen's size and is drawn
smaller, without touching the example's Dart code. The watchOS widget test
example/test/watchos_content_scale_test.dart lays the app out at that scale
on every watch screen size and fails on any overflow.
Not supported on watchOS
Nothing: every member of battery_plus_platform_interface 2.0.1 is implemented.
batteryLevel fails with an Exception while watchOS reports no level (-1), which some Simulators do.
PORTING_REPORT.md lists each member under "Interface coverage".
License
The FlutterWatch Authors under a BSD-3-Clause license. See LICENSE for the full text.