/**
* Shows display channels picker dialog or displays an error toast if active channels have not yet
* been introduced
*/
public void onClickedDisplayChannelsButton(View displayChannelsButton) {
// CHECKS IF CHANNELS TO ACTIVATE ARE ALREADY FILLED
if (newConfiguration.getActiveSensors() != null
&& newConfiguration.getActiveChannelsNumber() != 0) {
showDisplayChannels();
} else {
displayErrorToast(getString(R.string.nc_error_button_channels_to_display));
}
}
