public MainPageViewModel()
{
speechRecognize = DependencyService.Get <ISpeechRecognize>();
imagePickup = DependencyService.Get <IImagePickup>();
SpeechRecognizeCommand = new SpeechRecognizeCommand(speechRecognize);
PickupImageCommand = new PickupImageCommand(imagePickup);
speechRecognize.PropertyChanged += speechRecognizePropertyChanged;
imagePickup.PropertyChanged += imagePickupPropertyChanged;
}
public PickupImageCommand(IImagePickup imagePickup)
{
this.imagePickup = imagePickup;
}