Android Question I copied the source code for camera but not working

#Region Module Attributes
#FullScreen: False
#IncludeTitle: True
#ApplicationLabel: Camera example
#VersionCode: 1
#VersionName:
#SupportedOrientations: landscape
#End Region

'Activity module
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
Dim camera1 As Camera
Dim btnTakePicture As Button
Dim Panel1 As Panel
End Sub

Sub Activity_Create(FirstTime As Boolean)
Activity.LoadLayout("11")
End Sub
Sub Camera1_Ready (Success As Boolean)
If Success Then
camera1.StartPreview
btnTakePicture.Enabled = True
Else
ToastMessageShow("Cannot open camera.", True)
End If
End Sub

Sub Activity_Resume
btnTakePicture.Enabled = False
camera1.Initialize(Panel1, "Camera1")
End Sub

Sub Activity_Pause (UserClosed As Boolean)
camera1.Release
End Sub

Sub Camera1_PictureTaken (Data() As Byte)
camera1.StartPreview
Dim out As OutputStream
out = File.OpenOutput(File.DirRootExternal, "1q.jpg", False)
out.WriteBytes(Data, 0, Data.Length)
out.Close
ToastMessageShow("Image saved: " & File.Combine(File.DirRootExternal, "1q.jpg"), True)
btnTakePicture.Enabled = True
'Msgbox(2,2)
End Sub

Sub btnTakePicture_Click
btnTakePicture.Enabled = False
'Msgbox(1,1)
camera1.TakePicture
End Sub