private void ToggleFlashButtonTapped(object sender, EventArgs e)
{
_flashOn = !_flashOn;
if (_flashOn)
{
if (cameraType == CameraFacing.Back)
{
toggleFlashButton.SetBackgroundResource(Resource.Drawable.FlashButton);
cameraType = CameraFacing.Back;
camera.StopPreview();
camera.Release();
camera = Camera.Open((int)cameraType);
var parameters = camera.GetParameters();
parameters.FlashMode = Camera.Parameters.FlashModeTorch;
camera.SetParameters(parameters);
camera.SetPreviewTexture(surfaceTexture);
PrepareAndStartCamera();
}
}
else
{
toggleFlashButton.SetBackgroundResource(Resource.Drawable.NoFlashButton);
camera.StopPreview();
camera.Release();
camera = Camera.Open((int)cameraType);
var parameters = camera.GetParameters();
parameters.FlashMode = Camera.Parameters.FlashModeOff;
camera.SetParameters(parameters);
camera.SetPreviewTexture(surfaceTexture);
PrepareAndStartCamera();
}
}
protected override void OnElementPropertyChanged(PropertyChangedEventArgs args)
{
base.OnElementPropertyChanged(args);
switch (args.PropertyName)
{
case nameof(SelectedButton.IsSelected):
if (formsElement.Width == -1)
{
return;
}
if (formsElement.IsSelected)
{
nativeControl?.SetBackgroundResource(Resource.Layout.button_border);
GradientDrawable drawable = (GradientDrawable)nativeControl?.Background;
drawable.SetColor(Xamarin.Forms.Color.FromHex("#2e72c0").ToAndroid());
}
else
{
nativeControl.SetBackgroundResource(Resource.Layout.unselected_button);
GradientDrawable drawable = (GradientDrawable)nativeControl.Background;
drawable.SetColor(formsElement.BackgroundColor.ToAndroid());
}
break;
case nameof(SelectedButton.Height):
if (formsElement.Height == -1)
{
return;
}
if (formsElement.IsSelected)
{
nativeControl?.SetBackgroundResource(Resource.Layout.button_border);
GradientDrawable drawable = (GradientDrawable)nativeControl?.Background;
drawable.SetColor(Xamarin.Forms.Color.FromHex("#2e72c0").ToAndroid());
}
else
{
nativeControl.SetBackgroundResource(Resource.Layout.unselected_button);
GradientDrawable drawable = (GradientDrawable)nativeControl.Background;
drawable.SetColor(formsElement.BackgroundColor.ToAndroid());
}
break;
}
}
private void ToggleFlashButtonTapped(object sender, EventArgs e)
{
_flashOn = !_flashOn;
if (_flashOn)
{
_toggleFlashButton.SetBackgroundResource(Resource.Drawable.FlashButton);
var newCamparams = _camera.GetParameters();
newCamparams.FlashMode = Android.Hardware.Camera.Parameters.FlashModeTorch;
_camera.SetParameters(newCamparams);
}
else
{
_toggleFlashButton.SetBackgroundResource(Resource.Drawable.NoFlashButton);
var newParameters = _camera.GetParameters();
newParameters.FlashMode = Android.Hardware.Camera.Parameters.FlashModeOff;
_camera.SetParameters(newParameters);
}
}
protected override void OnAttached()
{
formsElement = Element as SelectedButton;
nativeControl = Control as Android.Widget.Button;
nativeControl.SetBackgroundResource(Resource.Layout.button_border);
GradientDrawable drawable = (GradientDrawable)nativeControl.Background;
drawable.SetColor(formsElement.BackgroundColor.ToAndroid());
nativeControl.LongClick += (s, args) =>
{
formsElement.LongPressCommand.Execute(new object());
};
}