Android Question java.lang.RuntimeException: Object should first be initialized (EditText)

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: True
#End Region
 
Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
 
End Sub
 
Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.
 
  
    Dim linea As String
    Dim lettura As TextReader
    Private EditText1 As EditText
  
End Sub
 
Sub Activity_Create(FirstTime As Boolean)
    lettura.Initialize(File.OpenInput(File.DirRootExternal,"Prova.txt"))
    linea=lettura.ReadAll
    Log(linea)
    EditText1.Text=linea
    lettura.Close
  
  
 
 
 
End Sub
 
 
Sub Activity_Resume
 
End Sub
 
Sub Activity_Pause (UserClosed As Boolean)
 
End Sub