This is a wrap for this Github project. You will require, other than for the attached B4A library files, the following jars in your additional library folder:
1. android-support-v4.jar
2. android-support-v7-appcompat.jar
When you start the app the first time it will prompt you (TTS and Toast) to enter a pattern. This pattern will be encrypted and saved in a file called Pattern.txt in the root folder of your device. Thus, the file will contain an encrypted representation of the pattern that you have recorded.
If you then quit and restart the app it will read the encrypted pattern from the file, decrypt it, and apply that as the unlock pattern. Draw the pattern that you have recorded previously and the pattern will be unlocked (i.e it will unlock when the saved pattern corresponds with the pattern that you are drawing after a new startup).
Posting the following:
1. B4A project for demonstration purposes
2. B4A library files - copy them to your additional library folder.
3. resource.zip - extract it and copy the folder to the same folder level as that of the /Files and /Objects folders of the B4A project.
4. Pattern.zip (it contains Pattern.txt). If you extract and copy this file to the root folder of your device then the pattern that I have drawn below will be used as the unlock pattern (until such time as what you record a new pattern). Pattern.txt contains the following string which is the encrypted string for the pattern that I have drawn in the image below(pattern was entered starting from top left):
Make sure you set this path correctly in the B4A code to reflect your own setup:
The B4A project contains 4 classes with inline java code for:
1. Toast messages
2. Text To Speech
3. String manipulation
4. Encryption / decryption
View when app starts:
Enter a pattern when app starts for the first time - it will be encrypted and save in the root folder of your device in a files named Pattern.txt
The new pattern is encrypted and saved once you lift your finger after drawing your pattern
Upon successful unlock (using previously recorded pattern).
Click on the menu (top right) at any time to record a new unlock patter. The new pattern will replace the previously recorded pattern as the new unlock pattern
Device root folder:
Sample Code:
Library:
PatternView
Author: Github: Georgi Eftimov, Wrapped by: Johan Schoeman
Version: 1.01
1. android-support-v4.jar
2. android-support-v7-appcompat.jar
When you start the app the first time it will prompt you (TTS and Toast) to enter a pattern. This pattern will be encrypted and saved in a file called Pattern.txt in the root folder of your device. Thus, the file will contain an encrypted representation of the pattern that you have recorded.
If you then quit and restart the app it will read the encrypted pattern from the file, decrypt it, and apply that as the unlock pattern. Draw the pattern that you have recorded previously and the pattern will be unlocked (i.e it will unlock when the saved pattern corresponds with the pattern that you are drawing after a new startup).
Posting the following:
1. B4A project for demonstration purposes
2. B4A library files - copy them to your additional library folder.
3. resource.zip - extract it and copy the folder to the same folder level as that of the /Files and /Objects folders of the B4A project.
4. Pattern.zip (it contains Pattern.txt). If you extract and copy this file to the root folder of your device then the pattern that I have drawn below will be used as the unlock pattern (until such time as what you record a new pattern). Pattern.txt contains the following string which is the encrypted string for the pattern that I have drawn in the image below(pattern was entered starting from top left):
B4X:
e9O3ZX3Ka9fp8H+NwYFhiRVFAU3XxLeFfLezPlkIDQQRgRHjCAHZMCVxI2mpUXs63I7uQs0cEnnBVg7A8qZXwJ5YI6+hRTzMA/X7WFuMliY=Make sure you set this path correctly in the B4A code to reflect your own setup:
B4X:
#AdditionalRes: C:\ANDRIOD_SDK_TOOLS\extras\android\support\v7\appcompat\res, android.support.v7.appcompatThe B4A project contains 4 classes with inline java code for:
1. Toast messages
2. Text To Speech
3. String manipulation
4. Encryption / decryption
View when app starts:
Enter a pattern when app starts for the first time - it will be encrypted and save in the root folder of your device in a files named Pattern.txt
The new pattern is encrypted and saved once you lift your finger after drawing your pattern
Upon successful unlock (using previously recorded pattern).
Click on the menu (top right) at any time to record a new unlock patter. The new pattern will replace the previously recorded pattern as the new unlock pattern
Device root folder:
Sample Code:
B4X:
#Region Project Attributes
#ApplicationLabel: PatternView
#VersionCode: 1
#VersionName:
'SupportedOrientations possible values: unspecified, landscape or portrait.
#SupportedOrientations: unspecified
#CanInstallToExternalStorage: False
#End Region
#AdditionalRes: ..\resource
'#AdditionalRes: C:\Users\----------2\Documents\Basic 4 Android\JOHAN APPS\JHS LIBS\resource\b4a_appcompat, de.amberhome.objects.appcompat
#AdditionalRes: C:\ANDRIOD_SDK_TOOLS\extras\android\support\v7\appcompat\res, android.support.v7.appcompat
#Extends: android.support.v7.app.AppCompatActivity
#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.
Dim t As Timer
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.
Private pv1 As PatternView
Dim crypt As AESCryptUtilities
Dim su As StringUtilities
Dim tts As TTSUtilities
Dim toast As ToastUtilities
Dim password As String = "Password1" 'the password to be used during encryption and decryption
Dim defPattern As String = ""
Private Label1 As Label
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("main")
t.Initialize("t", 1000)
pv1.Initialize("pv1")
Activity.AddView(pv1, 2%x, 10%y, 96%x, 70%y)
Label1.Visible = False
Activity.AddMenuItem("Record new pattern", "RecordNewPattern")
If File.ExternalWritable = False Then
Msgbox("Cannot write on storage card.", "")
Return
End If
crypt.Initialize 'used to encrypt the pattern
su.Initialize 'some string utilities
tts.Initialize
toast.Initialize
pv1.CircleColor = Colors.Blue
pv1.DotColor = Colors.White
pv1.PathColor = Colors.Yellow
pv1.GridSize = 5
pv1.TactileFeedbackEnabled = True
End Sub
Sub Activity_Resume
If File.Exists(File.DirRootExternal,"Pattern.txt") Then
Log("File Exists")
ReadString
defPattern = crypt.decrypt(password, defPattern)
Log("File Exist = " & defPattern)
setPattern
Else
Log("File Does Not Exists")
t.Enabled = True
End If
End Sub
Sub Activity_Pause (UserClosed As Boolean)
End Sub
Sub pv1_correct_pattern
tts.speakOut("correct pattern entered")
pv1.clearPattern
setPattern
pv1.Visible = False
Label1.Visible = True
End Sub
Sub pv1_incorrect_pattern
tts.speakOut("incorrect pattern entered")
End Sub
Sub pv1_new_pattern_entered
defPattern = pv1.GetPattern
SaveString(crypt.encrypt(password, defPattern))
tts.speakOut("New pattern entered, encrypted, and saved")
pv1.clearPattern
setPattern
End Sub
Sub setPattern
For k = 1 To su.stringLength(defPattern) Step 3
Dim i As Int = su.Mid(defPattern, k,1)
Dim j As Int = su.Mid(defPattern, k+1, 1)
pv1.addPatternCell(i,j)
Next
End Sub
Sub SaveString(encryptedmessage As String)
Log("SaveString = " & encryptedmessage)
File.WriteString(File.DirRootExternal, "Pattern.txt", encryptedmessage)
End Sub
Sub ReadString
defPattern = File.ReadString(File.DirRootExternal, "Pattern.txt")
Log("ReadString = " & defPattern)
End Sub
Sub RecordNewPattern_Click
pv1.clearPattern
End Sub
Sub t_tick
tts.speakOut("no lock pattern exists. please define a pattern by drawing it")
toast.displayToast("NO PATTERN EXISTS. ENTER A PATTERN")
t.Enabled = False
End Sub
Sub Label1_Click
Label1.Visible = False
pv1.Visible = True
End SubLibrary:
PatternView
Author: Github: Georgi Eftimov, Wrapped by: Johan Schoeman
Version: 1.01
- PatternView
Events:- correct_pattern, incorrect_pattern, new_pattern_entered
- ba As BA
- BringToFront
- DesignerCreateView (base As PanelWrapper, lw As LabelWrapper, props As Map)
- GetPattern As String
- Initialize (EventName As String)
- Invalidate
- Invalidate2 (arg0 As Rect)
- Invalidate3 (arg0 As Int, arg1 As Int, arg2 As Int, arg3 As Int)
- IsInitialized As Boolean
- RemoveView
- RequestFocus As Boolean
- SendToBack
- SetBackgroundImage (arg0 As Bitmap)
- SetColorAnimated (arg0 As Int, arg1 As Int, arg2 As Int)
- SetLayout (arg0 As Int, arg1 As Int, arg2 As Int, arg3 As Int)
- SetLayoutAnimated (arg0 As Int, arg1 As Int, arg2 As Int, arg3 As Int, arg4 As Int)
- SetVisibleAnimated (arg0 As Int, arg1 As Boolean)
- addPatternCell (row As Int, column As Int)
Set the display mode of the current pattern. This can be useful, for
instance, after detecting a pattern to tell this view whether change the
in progress result to correct or wrong.
displayMode: The display mode. - clearPattern
- Background As Drawable
- CircleColor As Int [write only]
- Color As Int [write only]
- DotColor As Int [write only]
- Enabled As Boolean
- GridSize As Int [write only]
- Height As Int
- Left As Int
- Parent As Object [read only]
- PathColor As Int [write only]
- TactileFeedbackEnabled As Boolean [write only]
Set whether the view will use tactile feedback. If true, there will be
tactile feedback as the user enters the pattern. - Tag As Object
- Top As Int
- Visible As Boolean
- Width As Int
Attachments
Last edited: