Android Question RandomAccesFiles java.lang.NullPointerException

Firpas

Active Member
Licensed User
Hi to everybody:

I'working with RandomAccessFiles and WriteEncryptedObject / ReadEncryptedObject and i have this error:

** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Service (httputils2service) Create **
** Service (httputils2service) Start **
ags_config_save (B4A line: 302)
Raf2.WriteEncryptedObject(Config2, "secret", Raf.CurrentPosition)
java.lang.NullPointerException
at com.ags.agsmtilitemobile.ags._config_save(ags.java:639)
at com.ags.agsmtilitemobile.main._jobdone(main.java:737)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:175)
at anywheresoftware.b4a.keywords.Common$5.run(Common.java:962)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5603)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
And this is my code:

B4X:
Sub Process_Globals
Dim ColorSondas() As Int = Array As Int(0xFF0000FF, 0xFF00C000, 0xFF00C0C0, 0xFFC0C000, 0xFFC04000, 0xFFC000C0, 0xFFC00000, 0xFFFF8000, 0xFFFF0000, 0xFF80FFFF, 0xFF808080, 0xFF808000, 0xFFFFFF00, 0xFF8080FF, 0xFFFF80FF, 0xFF80FF80, 0xFF8FBC8B, 0xFFFF00FF, 0xFF483D8B, 0xFF6495ED)
....
End Sub

Sub Config_Save As Boolean
    Try
        File.WriteMap(File.DirInternal, "Config.txt", Config)
     
        Dim Config2 As Map
        Config2.Initialize
        If File.Exists(DataDir, "Config.dat") AND File.Size(DataDir, "Config.dat") > 0 Then Then
            Dim Raf As RandomAccessFile
            Raf.Initialize(DataDir, "Config.dat", False)
            Config2 = Raf.ReadEncryptedObject("agsystem", Raf.CurrentPosition)
            Raf.Close
        End If
                     
        For Each Key As String In Config.Keys
            Config2.Put(Key, Config.Get(Key))
        Next
     
        Dim Raf2 As RandomAccessFile
        Raf2.Initialize(DataDir, "Config.dat", False)
       'The next sentence is the cause of the error
        Raf2.WriteEncryptedObject(Config2, "secret", Raf.CurrentPosition)
        Raf2.Close
        Return True
    Catch
        Log(LastException)
        Return False
    End Try
End Sub
I want to save a Map and one key contains an array of 20 elements (int).
Can this be the cause? How do I fix it?

What i'm doing wrong??

Thanks
 
Last edited:
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