Android Question remove last label

Solution
M
MroBurk said:
Is there a possibility to delete the last one and befores by button
Click to expand...
Here is a complete project where you can delete the last label either by long click of the label itself or a button. It deletes from the last button up every time you click the button or long click the label itself
Sort by date Sort by votes
M

Mahares

Expert
Licensed User
Longtime User
MroBurk said:
delete the selected lbl with a long_click?
Click to expand...
This solution and changes are to remove the last inserted label with the long click.
Your project by the way crashes. You need to comment all these Label.visible lines
' Label1.Visible=False
' Label2.Visible=False
' Label3.Visible=False
' Label4.Visible=False
' Label5.Visible=False
' .....In between too
' Label20.Visible=False
' Label21.Visible=False

B4X: 
Private x, i As Int   'needs added to Globals
B4X: 
Private Sub Button1_Click
    Dim w =200dip, h=50dip As Float
    lbl(i).Initialize("lbl")
    Activity.AddView(lbl(i), 0,i*60dip+200dip, w, h)    
    lbl(i).Text= a
    lbl(i).TextSize = 20
    ColorLabel(lbl(i))
    x=i
    i=i+1
    If i=n Then Button1.Enabled =False
End Sub

B4X: 
Private Sub lbl_LongClick
    Activity.RemoveViewAt(x+2)    'the 2 is because the labels come after Panel1 and Button1 in the activity
    i=i-1
End Sub
If you have trouble I can post your project corrected
 
Upvote 0
M

MroBurk

Member
Licensed User
thanks a lot @Mahares but It remove only one... If it's clicked to the other one it crashes

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.unFocus(android.view.View)' on a null object reference
 

Attachments

  • radiobutton e spinner2.zip
    10.8 KB · Views: 273
Upvote 0
M

Mahares

Expert
Licensed User
Longtime User
MroBurk said:
If it's clicked to the other one it crashes
Click to expand...

If you want to remove more than 1 label but starting from the bottom one on up, this will work. For random label removal, you will need to tweak it. I did not have a chance to look further. In that case put the corrected project and ask the members to help you for more tweaking
B4X: 
Private Sub Button1_Click
    Dim w =200dip, h=50dip As Float
    lbl(i).Initialize("lbl")
    Activity.AddView(lbl(i), 0,i*60dip+200dip, w, h)
    lbl(i).Text= a
    lbl(i).TextSize = 20
    ColorLabel(lbl(i))
    lbl(i).Tag =i  'add this line
    x=i
    i=i+1
    If i=n Then Button1.Enabled =False
End Sub

B4X: 
Private Sub lbl_LongClick
    Dim l As Label=Sender
    Activity.RemoveViewAt(l.tag+2)    'the 2 is because the labels come after Panel1 and Button1 in the activity
End Sub
 
Last edited:
Upvote 0
M

MroBurk

Member
Licensed User
@Mahares thanks!!! Is there a possibility to delete the last one and befores by button? I tried with this but it crash
B4X: 
  Activity.RemoveViewAt(x+2)    'the 2 is because the labels come after Panel1 and Button1 in the activity
    i=i-1
 
Upvote 0
M

Mahares

Expert
Licensed User
Longtime User
MroBurk said:
Is there a possibility to delete the last one and befores by button
Click to expand...
Here is a complete project where you can delete the last label either by long click of the label itself or a button. It deletes from the last button up every time you click the button or long click the label itself
 

Attachments

  • RadioButtonsSpinnerLabels013022.zip
    10.9 KB · Views: 303
Upvote 1
Solution
You must log in or register to reply here.

Similar Threads

  • Article
B4A Library [B4X] [XUI] AS WheelPicker - Spinner - a modern single/multiple choice picker view - based on xCustomListView [Payware]
7 8 9
Replies
173
Views
58K
Alexander Stolte
  • Article
B4A Library [B4X] PreoptimizedCLV - Lazy loading extension for xCustomListView
2 3
Replies
53
Views
37K
Erel
  • Locked
  • Article
B4A Library [B4X] B4XTable - Cross platform, sortable, searchable, customizable table
2
Replies
28
Views
68K
Erel
  • Article
Android Tutorial [B4X] [XUI] CustomListView - lazy loading / virtualization
Replies
18
Views
45K
MarcoRome
  • Question
Android Question homescreen widget => orientation removes last updates
2
Replies
23
Views
5K
Bryan
B
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…