I am trying to add a text field onto my Android app in Eclipse, but then I drag the Plain text option on to the graphical layout, a message at the bottom comes
The W in Android 4.4W suggest wearable devices. Android Wear is a wrist watch and you cannot type anything in it so you cannot use EditText on 4.4W. Change the API to 19 or less or change it to 4.4L
Check it out @ https://developer.android.com/design/wear/index.html
You can change your previewing API version as Jim suggested if u don't want to develop apps for wearable devices.