Android Color Dialog Tutorial using Basic4Android

Submitted by donbermoy on Tuesday, January 21, 2014 - 22:12.

In this tutorial, I will introduce another kind of dialog, the Color Dialog. First, you need to create one button and named it Button1. Next, named your layout name as "Main". Declare first your variable in the Sub_Global like this:

Sub Globals
        'These global variables will be redeclared each time the activity is created.
        'These variables can only be accessed from this module.
 
        Dim Button1 As Button
        Dim bmp As Bitmap
End Sub

I have initialized bmp as Bitmap because I wanted to have an icon to my ColorDialog. Here's the full code for this:

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 Button1 As Button
        Dim bmp As Bitmap
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("Layout1")
        Activity.LoadLayout("Main")
        bmp.InitializeSample(File.DirAssets, "bermoy.jpg",48,48)
        Activity.Title = "Color Dialog - Lyndon Bermoy"
        
End Sub
 
Sub Activity_Resume
 
End Sub
 
Sub Activity_Pause (UserClosed As Boolean)
 
End Sub
 
Sub Button1_Click
        Dim cd As ColorDialog
        Dim color As Int
        Dim ret As Object
        cd.RGB = Colors.RGB(128, 128, 128)
        ret = cd.Show("B4A Color Dialog", "Yes", "No", "Maybe", bmp)    
        ToastMessageShow(ret & " : " & cd.Red & " " & cd.Green & " " & cd.Blue, False)
        Activity.color = cd.RGB
End Sub

Note: cd - used as my variable for ColorDialog color - used as my variable for Int ret - used as my variable for Object cd.RGB = Colors.RGB(128, 128, 128)- a syntax used to declare an RGB Color (Red,Blue,Green). 128 is the default color for Red, as well as the Green and color Blue. Activity.color = cd.RGB - syntax used that after clicking the button, it will set the RGB color you set and it will be the background color. Best Regards, Engr. Lyndon Bermoy IT Instructor/System Developer/Android Developer/Freelance Programmer If you have some queries, feel free to contact the number or e-mail below. Mobile: 09488225971 Landline: 826-9296 E-mail:[email protected] Add and Follow me on Facebook: https://www.facebook.com/donzzsky Visit and like my page on Facebook at: https://www.facebook.com/BermzISware

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