B4J Question Changing Background Color of a Label

embedded

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I am using Label2_time.Style="-fx-background-color: green" during running of my program...working ok. But the color is dull. I want to set color #FF18F900 this one.
Trying label2_time.Style="-fx-background-color:#FF18F900" but not working. Please help.
 

stevel05

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You should use the CSSUtils lib to set the background color as it will not overwrite any other styles on the view.

Try this:

B4X:
CSSUtils.SetBackgroundColor(Label2_time,fx.Colors.From32Bit(0xFF18F900))
 
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XorAndOr

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Another option is to use jXUI.

B4X:
Dim x As B4XView = YourLabel
x.Color = 0xFF18F900

Hi, sorry if I do not open another thread. I have this sub that reads the data of a sqlite database where I have the color codes. I would like to color a label by taking its color but I do not know where I'm wrong. thank you
B4X:
Sub ComboBox3_SelectedIndexChanged(Index As Int, Value As Object)
    Label3.Text = Index +1
    
    If Index > -1 Then

        dbCursor = dbSQL.ExecQuery2("SELECT ColoriCode FROM TbGeneri WHERE Colori LIKE ?", Array(Value))
        Do While dbCursor.NextRow
            Dim valori(dbCursor.ColumnCount) As String
            For col = 0 To dbCursor.ColumnCount - 1
                valori(col) = dbCursor.GetString2(col)
            Next
            
                        
            Dim a As List
            a.Initialize
            a.AddAll(valori)
            Dim b As String
            b = a.Get(0)
            
            Log(b)'  <---------------- 0xFF18F900
                                    
            
            Dim x As B4XView = Label3
            x.Color = 0xFF18F900       ' this works
            
            
            ' I need this code
            Dim x As B4XView = Label3
            x.Color = b                ' this don't works
            
            
        Loop
    End If
    dbCursor.Close
        
End Sub
 
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AnandGupta

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Using quick thinking of FoxPro/Clipper here, as '0xFF18F900' is literal but 'b' is variable, so we may need to do '(b)' or '&b' or something like that.

Will be happy if it helps.

Regards,

Anand
 
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Daestrum

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Uses JavaObject library

B4X:
 Dim c As String = "0xFF18F900"    ' your value from DB
 Dim dummylong As Long
 Dim jo As JavaObject = dummylong
 ' remove the 0x prefix and parse into a long value 
 dummylong = jo.RunMethod("parseLong",Array(c.Replace("0x",""),16))  
 Log(dummylong)    ' dummylong contains the value you can use
 
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Daestrum

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Can you show where you added the code ?
 
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XorAndOr

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Can you show where you added the code ?

here

B4X:
Sub ComboBox3_SelectedIndexChanged(Index As Int, Value As Object)
    Label3.Text = Index +1
    
    If Index > -1 Then

        dbCursor = dbSQL.ExecQuery2("SELECT ColoriCode FROM TbGeneri WHERE Colori LIKE ?", Array(Value))
        Do While dbCursor.NextRow
            Dim valori(dbCursor.ColumnCount) As String
            For col = 0 To dbCursor.ColumnCount - 1
                valori(col) = dbCursor.GetString2(col)
            Next
            
                        
            Dim a As List
            a.Initialize
            a.AddAll(valori)
            
            Dim b As String
            
            b = a.Get(0)
            
            Log(b)'  <---------------- 0xFF18F900           

            Dim dummylong As Long
            Dim jo As JavaObject = dummylong
            
            ' remove the 0x prefix and parse into a long value
            dummylong = jo.RunMethod("parseLong",Array(b.Replace("0x",""),16))
            Log(dummylong)
            
            
            Dim x As B4XView = Label3
            x.Color = dummylong
            
            
        Loop
    End If
    dbCursor.Close
        
End Sub
 
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Daestrum

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I wonder if there is an extra character in b, a space maybe
what does
B4X:
log(b.length)
return, it should be 10
 
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Daestrum

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just change

B4X:
b = a.Get(0)
to
B4X:
b = a.Get(0)
b = b.trim

or change
B4X:
 dummylong = jo.RunMethod("parseLong",Array(b.Replace("0x",""),16))
to
B4X:
 dummylong = jo.RunMethod("parseLong",Array(b.Replace("0x","").Replace(" ",""),16))
 
Last edited:
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