Android Question Simple PGP

#AdditionalJar: bcpkix-jdk15on-1.58.0.0
#AdditionalJar: bcprov-jdk15on-1.59
#AdditionalJar: bctls-jdk15on-1.58.0.0
#AdditionalJar: pg-1.54.0.0
#AdditionalJar: sc-core-1.58.0.0
#AdditionalJar: sc-prov-1.58.0.0
#AdditionalJar: slf4j-api-1.7.25


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 pgpkeys As PGPKeyPairGenerator
    Dim signer As PGPMessageSigner
    Dim crypt As PGPMessageEncryptor
    Private EditPass As EditText
    Private txt1 As EditText
    Private txt2 As EditText
    Private btnCrypt As Button
    Private btnDecrypt As Button
    Private btnCls As Button
End Sub

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    Activity.LoadLayout("principal")

    Dim publicKey As OutputStream
    publicKey = File.OpenOutput(File.DirRootExternal,"PublicKey.txt",False)
    
    Dim secretKey As OutputStream
    secretKey = File.OpenOutput(File.DirRootExternal,"SecretKey.txt",False)

    pgpkeys.Initialize("")
    Log(pgpkeys.generateKeyPair("gersonpinto","pass123",publicKey, secretKey))
    
    'signer.
    'crypt.encrypt(publickeyofreceipient, "Manfred",plaininputdata, destfile)
    
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub


Sub btnCrypt_Click
    
    File.WriteString(File.DirRootExternal, "clear.txt", txt1.Text)
    File.WriteString(File.DirRootExternal, "crip.txt", "criptografado")
    Dim out As OutputStream = File.OpenOutput(File.DirRootExternal, "crip.txt", False)
    Dim pk As InputStream = File.OpenInput(File.DirRootExternal,"PublicKey.txt")
    Dim plaindata As InputStream =File.OpenInput(File.DirRootExternal,"clear.txt")
'       
    crypt.encrypt(pk,"name",plaindata,out)
'   
    txt2.Text = File.ReadString(File.DirRootExternal,"criptografado.txt")
    out.Close
    pk.Close
    plaindata.Close

    
    
End Sub