Android Question Get .Top and .Left positions for Buttons created with relative positions


Licensed User

I have a Designer script that positions some Buttons with "Relative" positioning and I want to animate them using the Animation library. For this I require the .Top and .Left positions as I want to animate them horizontally and not from the top left of the screen. Note: .Left position isn't really required as I will use 0 but the principle holds. The Designer script code for the positioning of the Imageviews:
IconButton_B.Top=IconButton_A.Bottom + 25dip
IconButton_C.Top=IconButton_B.Bottom + 25dip
IconButton_D.Top=IconButton_C.Bottom + 25dip

However when I run this code to get the co-ordinates I only get the .Top from the first Button and not the other Buttons.
'Refresh UI so can calculate location of Buttons
    For I= 0 To 3
        LogColor("Sub: SecondScreen.Activity_Create(). IconButtonCoordinates Array - Button:= " & Starter.IconButtonCoordinates(I,0),Colors.Blue)
        LogColor("Sub: SecondScreen.Activity_Create(). IconButtonCoordinates Array - Top:= " & Starter.IconButtonCoordinates(I,1),Colors.DarkGray)
        LogColor("Sub: SecondScreen.Activity_Create(). IconButtonCoordinates Array - Left:= " & Starter.IconButtonCoordinates(I,2),Colors.Magenta)

In the log I get returned (see attached image).

I believe it is some kind of timing issue as the Buttons draw correctly (see attachment) on screen in their relative positions (as per Designer script). I just can't get access to the positions myself.

I believe a Callback is required (read on a java forum)? But I don't know what to do and I have no java knowledge. See attachment for Java answer to my problem.


  • B4x Coordinate Log.PNG
    B4x Coordinate Log.PNG
    19.6 KB · Views: 165
  • B4x Java Callback.PNG
    B4x Java Callback.PNG
    17 KB · Views: 160
  • B4X - IconButtons as per Designer.png
    B4X - IconButtons as per Designer.png
    43 KB · Views: 161
Last edited:


Licensed User

I have no issue with the icon buttons positioning correctly.

I wanted to get the .Top position of each Icon Button so I can use the Animation library to animate them horizontally and not from the top left of screen. I want the icon buttons to appear to move sideways from the left of screen not from the top left of screen. For this I needed the .Top position for each Icon Button to set the start position of each Icon Button.

Anyhow, it does seem to be an issue with timing and not being able to get correct co-ordinates to store in an array (or single variables).

I have now put a time delay using this function (see code):
Sub Delay(nMilliSecond As Long)
    Dim nBeginTime As Long
    Dim nEndTime As Long
    nEndTime = DateTime.Now + nMilliSecond
    nBeginTime = DateTime.Now
    Do While nBeginTime < nEndTime
        nBeginTime = DateTime.Now
        If nEndTime < nBeginTime Then
        End If
End Sub

and set it to 5 nMilliSecond.

By using this time 5 nMilliSecond delay I can get the array (and/or single variables) to get the .Top correctly with the .Top value of each Icon Button rather than populate with 0 that happens without the delay.

I don't know if this is a hack or what I should be using but it works.
Upvote 0