Android Question ABWifi Error When Wifi Switched Off

rgarnett1955

Active Member
Licensed User
Hi,

I am Using ABwifi to turn the phone's wifi on and then to scan for access points. When the phones wifi is turned off ABwifi throws an error.

The code is:
B4X:
#Region  Project Attributes
    #ApplicationLabel: efence
    #VersionCode: 1
    #VersionName:
    'SupportedOrientations possible values: unspecified, landscape or portrait.
    #SupportedOrientations: portrait
    #CanInstallToExternalStorage: False
#End Region
    '#Extends: android.support.v7.app.AppCompatActivity

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: True
    #Extends: android.support.v7.app.AppCompatActivity
#End Region


Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    Dim badge As Int
    Dim wifiBitmap As Bitmap
   
    ' Comms '
    Dim Sock1 As Socket                            'WiFi Socket to get embedded fence data
    Dim AStreams As AsyncStreams
    Dim Conv As ByteConverter
    Dim cmdNoglbl As Int
    Dim msg As String
    Dim wifi As ABWifi
    Dim wifiML As MLwifi
    Dim wifiList As List
    Dim wifiFences As List
   
    ' Timers
    Dim Const nSamples = 512 As Int
    Dim Const blockSize = 64 As Int
    Dim const fs = 1500000 / 4 As Float
    Dim const T  = 1/fs * 1000000 As Float
    Dim Const t1Interval = 200 As Float
    Dim Const ipAddress = "20.0.0.1" As String
   
    Dim fieldStr As String
    Dim fieldByte(90) As Byte
    Dim fieldFloat(15) As Float
    Dim fieldFloatBlock(blockSize) As Float
    Dim waveFloat(nSamples) As Float
    Dim blockNum As Int
    'Dim f As RandomAccessFile
   
    Dim t1 As Timer
    Dim timeOutTimer As Timer
    Dim timerNetPing As Timer
   
    Dim timeOutFlag As Boolean
    Dim timeOutTime As Float
    Dim timeSec As Float
    Dim Const tAdHoc = 40 As Float
    Dim Const tGetLog = 0.5 As Float
    Dim Const tGetLastWF = 3 As Float
    Dim Const tGraph = 0.5 As Float
    Dim timeBase As Float
    Dim timeBasePct As Float
    Dim timProgress As Float
   
    Dim conversationCancel As Boolean

    Type logRec_t(dateF As Float, timeF As Float, serialNo As String, peakVoltsMax As Float, _
                peakVoltsMin As Float, peakVoltsMaxAvg As Float, peakVoltsMaxStd As Float, _
                   peakVoltsMean As Float, peakVoltsStdDev As Float, peakIMax As Float, _
                peakIMin As Float, peakIMaxAvg As Float, peakIMaxStd As Float, _
                peakIMean As Float, peakIStdDev As Float, riseTimeAvg As Float, _
                riseTimeStdDev As Float, ipTime As Float, recStatus As String, empty As Boolean)

    Type eFenceLocCurrent_t(eFenceSn As String, LctnDesc As String, LocGPS As String, Empty As Boolean)
    Dim logRecCurrent As logRec_t
    Dim eFenceLocCurrent As eFenceLocCurrent_t
End Sub


Sub Globals
    Private lblStatus As Label
    Private lblTitle As Label

    Private lblIPP As Label
    Private lblPkVoltsAvg As Label
    Private lblPkVoltsMean As Label
    Private lblPkVoltsSD As Label
    Private lblRiseTime As Label
    Private lblS1 As Label
    Private lblS2 As Label
    Private lblS3 As Label
    Private lblS4 As Label
    Private lblS5 As Label
    Private lblS6 As Label

    Private lblDateTime As Label
    Private lblS7 As Label
    Private lbPkVoltsMeanSD As Label
    Private pnlGraph As Panel

    Private tglBtnZoom As ToggleButton
    Private btnRefresh As Button
'    Private CircleProgressBar1 As CircleProgressBar

    Private ACToolBarLight1 As ACToolBarLight
    Private ToolbarHelper As ACActionBar
    Private sm As SlidingMenu
    Private ListView1 As ListView
    Private acNewBtn As ACFlatButton
    Private btnCreateLocation As Button
    Private ACitem As ACMenuItem
End Sub


Sub Activity_Create(FirstTime As Boolean)
    logRecCurrent.Initialize
    eFenceLocCurrent.Initialize
    badge = 0

    If FirstTime Then
        wifiBitmap = LoadBitmap(File.DirAssets, "WiFi.png")
        'Progress timer initialize
        t1.Initialize("t1", t1Interval)
        t1.Enabled = False
        timeBasePct = tAdHoc + tGetLog + tGetLastWF + tGraph
   
        timeOutTimer.Initialize("timeOut", 1000)
        timeOutFlag = False
   
        timerNetPing.Initialize("timerNetPingCallback", 2000)
        If dataBasefcn.dbStartup = 0 Then
            Log("DB Startup Failed")
        End If
    End If
   
    Activity.LoadLayout("main")
    Activity.Title = "eFence"
    ToolbarHelper.Initialize
    ACToolBarLight1.Title = "eFence"
    ACToolBarLight1.SubTitle = ""
    ACToolBarLight1.Color = 0xFF001364
    ToolbarHelper.ShowUpIndicator = True 'set to true to show the up arrow
    ToolbarHelper.UpIndicatorDrawable = BitmapToBitmapDrawable(LoadBitmap(File.DirAssets, "hamburger.png"))
    ACToolBarLight1.InitMenuListener

    sm.Initialize("sm")
    Dim offset As Int = 85dip
    sm.BehindOffset = offset
    sm.Mode = sm.LEFT
    Dim lftMenu As Panel

    lftMenu.Initialize("")
    sm.Menu.AddView(lftMenu, 0, 0, 100%x - offset, 100%y)
    lftMenu.LoadLayout("Left")
    ListView1.Top = 50dip

    ListView1.TwoLinesLayout.ItemHeight = 60dip
    ListView1.TwoLinesLayout.Label.TextSize = 20
    ListView1.TwoLinesLayout.SecondLabel.TextSize = 12
       
    ListView1.AddTwoLines("Fence List", "Open the list of fences")
    ListView1.AddTwoLines("View Trends", "View voltage & current tends")
    ListView1.AddTwoLines("Fault List", "List dates & durations of faults")
    ListView1.AddTwoLines("Health Report", "Health Summary of all fences")
    ListView1.AddTwoLines("Database Tasks", "View and Edit Data Base")

    lblStatus.Padding = Array As Int(5dip, 3dip, 0dip, 5dip)
    lblTitle.Padding= Array As Int(2dip, 3dip, 0dip, 2dip)
   
    lblPkVoltsAvg.Padding= Array As Int(2dip, 3dip, 7dip, 2dip)
    lblPkVoltsMean.Padding= Array As Int(2dip, 3dip, 7dip, 2dip)
    lblPkVoltsSD.Padding= Array As Int(2dip, 3dip, 7dip, 2dip)
    lblDateTime.Padding= Array As Int(2dip, 3dip, 7dip, 2dip)
    lbPkVoltsMeanSD.Padding= Array As Int(2dip, 3dip, 7dip, 2dip)
    lblRiseTime.Padding= Array As Int(2dip, 3dip, 7dip, 2dip)
    lblIPP.Padding= Array As Int(2dip, 3dip, 7dip, 2dip)
   
    DateTime.SetTimeZone(0)
    DateTime.DateFormat = "yy/MM/dd hh:mm:ss"
       
    'Initialize the WiFi Socket
    lblStatus.Text = "  No Connection"   
    Sock1.Initialize("Sock1")
   
    Try
        wifi.Initialize("wifi")
    Catch
        Log(LastException)
    End Try
   
    wifiList.Initialize
    wifiFences.Initialize
   
    Try
        wifi.StartWifi
    Catch
        Log(LastException)
    End Try

    'Scan for AP's
    Try
        wifi.GetNewReadingWifi       
    Catch
        Log(LastException)
    End Try
End Sub


Sub wifi_FoundReadings(readings As List)

   Dim i As Int
   Dim Matcher1 As Matcher
   Dim Matcher2 As Matcher
   Dim regExPattern As String
   Dim regExPattern2 As String
   Dim reading As ABWifiReading
   
   Try
     wifi.StopWifi
   Catch
     Log(LastException)
   End Try
   
   wifiList.Clear
   wifiFences.Clear
   wifiList.AddAllAt(0, readings)
   
   regExPattern = "^WIFI-EF\d{5}"
   regExPattern2 = "^WiredSSID"
   
   For i = 0 To readings.Size - 1
     reading = readings.Get(i)
     Matcher1 = Regex.Matcher(regExPattern, reading.SSID)

     If Matcher1.Find = True Then
       wifiFences.Add(reading)
     End If
     
     ' This is used for debugging with the genimotion emulator which does not report the WiFiSSID.
     Matcher2 = Regex.Matcher(regExPattern2, reading.SSID)
     
     If Matcher2.Find = True Then
       Sock1.Initialize("Sock1")
       Sock1.Connect(ipAddress, 8899, 3000)
       Return
     End If
     
     wifiFences.SortType("Level", False)
   Next
   
   'Open the eFence table manager
   mngFenceLoc.mngFenceLocMode = 2
   StartActivity(mngFenceLoc)
   Wait For CanContinue
   
   socketConnect
End Sub


I get the following error:

I get the following error:

java.lang.RuntimeException: Error receiving broadcast Intent { act=android.net.wifi.WIFI_STATE_CHANGED flg=0x8000010 (has extras) } in com.AB.ABWifi.ABWifi$1@420feca8
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:860)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:5751)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1083)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:850)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.AB.ABWifi.ABWifi$1.onReceive(ABWifi.java:132)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:845)
... 9 more


The WiFi does get turned on so it seems the problem is with wifi_FoundReadings the call back and there are no errors thrown within the try/catch structures/

In tried the statement

B4X:
Wait For wifi.StartWifi

As the StartWifi supposedly returns a boolean result however the program then did not execute the wifi.GetNewReadingWifi statement.

Am I using the functions incorrectly or is there a bug? What can I try?
 
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