Writing Data

You can write health data to Apple HealthKit and Android Health Connect using the Write method. Request write permissions first using PermissionType.Write.

public class HealthWriteViewModel(IHealthService health)
{
    async Task WriteDataAsync()
    {
        // 1. Request write permissions (uniform for all types)
        await health.RequestPermissions(
            PermissionType.Write,
            DataType.Weight,
            DataType.StepCount,
            DataType.Hydration
        );

        // Or mix read/write per metric in a single call
        // await health.RequestPermissions(
        //     (PermissionType.Write, DataType.Weight),
        //     (PermissionType.Write, DataType.StepCount),
        //     (PermissionType.ReadWrite, DataType.Hydration)
        // );

        var now = DateTimeOffset.Now;

        // 2. Write a weight measurement
        await health.Write(new NumericHealthResult(DataType.Weight, now, now, 75.0));

        // 3. Write step counts over a time range
        await health.Write(new NumericHealthResult(
            DataType.StepCount, now.AddMinutes(-30), now, 500
        ));

        // 4. Write blood pressure
        await health.Write(new BloodPressureResult(now, now, 120.0, 80.0));
    }
}