How to use expo-battery - 10 common examples

function getBatteryStateString(batteryState: Battery.BatteryState): string {
  switch (batteryState) {
    case Battery.BatteryState.UNPLUGGED:
      return 'UNPLUGGED';
    case Battery.BatteryState.CHARGING:
      return 'CHARGING';
    case Battery.BatteryState.FULL:
      return 'FULL';
    case Battery.BatteryState.UNKNOWN:
    default:
      return 'UNKNOWN';
  }
}

export default function BatteryScreen() {
  const [isAvailable, setIsAvailable] = React.useState(null);
  const [batteryLevel, setBatteryLevel] = React.useState(-1);
  const [batteryState, setBatteryState] = React.useState(Battery.BatteryState.UNKNOWN);
  const [lowPowerMode, setLowPowerMode] = React.useState(false);

  React.useEffect(() => {
    (async () => {
      const [isAvailable, batteryLevel, batteryState, lowPowerMode] = await Promise.all([
        Battery.isAvailableAsync(),
        Battery.getBatteryLevelAsync(),
        Battery.getBatteryStateAsync(),
        Battery.isLowPowerModeEnabledAsync(),
      ]);

      setIsAvailable(isAvailable && false);
      setBatteryLevel(batteryLevel);
      setBatteryState(batteryState);
      setLowPowerMode(lowPowerMode);
    })();

React.useEffect(() => {
    (async () => {
      const [isAvailable, batteryLevel, batteryState, lowPowerMode] = await Promise.all([
        Battery.isAvailableAsync(),
        Battery.getBatteryLevelAsync(),
        Battery.getBatteryStateAsync(),
        Battery.isLowPowerModeEnabledAsync(),
      ]);

      setIsAvailable(isAvailable && false);
      setBatteryLevel(batteryLevel);
      setBatteryState(batteryState);
      setLowPowerMode(lowPowerMode);
    })();
    const batteryLevelListener = Battery.addBatteryLevelListener(({ batteryLevel }) =>
      setBatteryLevel(batteryLevel)
    );
    const batteryStateListener = Battery.addBatteryStateListener(({ batteryState }) =>
      setBatteryState(batteryState)
    );
    const lowPowerModeListener = Battery.addLowPowerModeListener(({ lowPowerMode }) =>
      setLowPowerMode(lowPowerMode)
    );
    return () => {
      batteryLevelListener && batteryLevelListener.remove();
      batteryStateListener && batteryStateListener.remove();
      lowPowerModeListener && lowPowerModeListener.remove();
    };
  }, []);

useEffect(() => {
    (async () => {
      const currentLevel = await Battery.getBatteryLevelAsync();
      setLevel(currentLevel);
    })();
    const subscription = Battery.addBatteryLevelListener(({ batteryLevel }) =>
      setLevel(batteryLevel)
    );
    return () => subscription.remove();
  }, []);
  return (

(async () => {
      const currentLevel = await Battery.getBatteryLevelAsync();
      setLevel(currentLevel);
    })();
    const subscription = Battery.addBatteryLevelListener(({ batteryLevel }) =>

(async () => {
      const [isAvailable, batteryLevel, batteryState, lowPowerMode] = await Promise.all([
        Battery.isAvailableAsync(),
        Battery.getBatteryLevelAsync(),
        Battery.getBatteryStateAsync(),
        Battery.isLowPowerModeEnabledAsync(),
      ]);

      setIsAvailable(isAvailable && false);
      setBatteryLevel(batteryLevel);
      setBatteryState(batteryState);
      setLowPowerMode(lowPowerMode);
    })();
    const batteryLevelListener = Battery.addBatteryLevelListener(({ batteryLevel }) =>

export const UseBatteryState: React.SFC = (props) => {
	const [batteryState] = useBatteryState();

	return (
		
			
				This example only uses the Battery module.
				It renders the current battery state, received from the listener.
			
			
				Battery state
				
			
		
	);
};

const [isAvailable, batteryLevel, batteryState, lowPowerMode] = await Promise.all([
        Battery.isAvailableAsync(),
        Battery.getBatteryLevelAsync(),
        Battery.getBatteryStateAsync(),
        Battery.isLowPowerModeEnabledAsync(),
      ]);

      setIsAvailable(isAvailable && false);
      setBatteryLevel(batteryLevel);
      setBatteryState(batteryState);
      setLowPowerMode(lowPowerMode);
    })();
    const batteryLevelListener = Battery.addBatteryLevelListener(({ batteryLevel }) =>
      setBatteryLevel(batteryLevel)
    );
    const batteryStateListener = Battery.addBatteryStateListener(({ batteryState }) =>
      setBatteryState(batteryState)
    );
    const lowPowerModeListener = Battery.addLowPowerModeListener(({ lowPowerMode }) =>
      setLowPowerMode(lowPowerMode)
    );
    return () => {
      batteryLevelListener && batteryLevelListener.remove();
      batteryStateListener && batteryStateListener.remove();
      lowPowerModeListener && lowPowerModeListener.remove();
    };
  }, []);

Battery.getBatteryStateAsync(),
        Battery.isLowPowerModeEnabledAsync(),
      ]);

      setIsAvailable(isAvailable && false);
      setBatteryLevel(batteryLevel);
      setBatteryState(batteryState);
      setLowPowerMode(lowPowerMode);
    })();
    const batteryLevelListener = Battery.addBatteryLevelListener(({ batteryLevel }) =>
      setBatteryLevel(batteryLevel)
    );
    const batteryStateListener = Battery.addBatteryStateListener(({ batteryState }) =>
      setBatteryState(batteryState)
    );
    const lowPowerModeListener = Battery.addLowPowerModeListener(({ lowPowerMode }) =>
      setLowPowerMode(lowPowerMode)
    );
    return () => {
      batteryLevelListener && batteryLevelListener.remove();
      batteryStateListener && batteryStateListener.remove();
      lowPowerModeListener && lowPowerModeListener.remove();
    };
  }, []);

(async () => {
      const [isAvailable, batteryLevel, batteryState, lowPowerMode] = await Promise.all([
        Battery.isAvailableAsync(),
        Battery.getBatteryLevelAsync(),
        Battery.getBatteryStateAsync(),
        Battery.isLowPowerModeEnabledAsync(),
      ]);

      setIsAvailable(isAvailable && false);
      setBatteryLevel(batteryLevel);
      setBatteryState(batteryState);
      setLowPowerMode(lowPowerMode);
    })();
    const batteryLevelListener = Battery.addBatteryLevelListener(({ batteryLevel }) =>