Android Question Designer - minimum layout height - B4A 5.80

LucaMs · Mar 28, 2016

I tried to create a layout 40dip height.
I received this message:

('-10' is not a valid value for property "Height").

You don't see the new variant in the list, but if you save and open again the Designer, you can see it, but you get the same message.

Also, after I created a layout 50dip; the gray panel does not appear (Designer) and, unless I do something was wrong (dimensions), loading the layout is incorrect (attached project).

Thank you

LucaMs · Mar 28, 2016

LucaMs said:
Also, after I created a layout 50dip; the gray panel does not appear (Designer) and, unless I do something was wrong (dimensions), loading the layout is incorrect (attached project).

It is "right". My error is:

B4X:

CustomListView1.Add(CreateHeader(210dip, 50dip), 50dip, 0)

the header layout is 210dip x 50dip but scaled; the height of the buttons results 93dip on my device (this is why I want to create a 40dip height layout).

So, I don't know an easy way to manage this situations.

Anyway, this is not the "question" of this thread.

LucaMs · Mar 28, 2016

This can be a convoluted solution.

However, loading the layout "header", buttons lose their style (this happens anyway: is it due to remove and then add the panel again?).

Erel · Mar 28, 2016

There is no such thing as layout height. The layout height is determined by the activity or panel that the layout will be loaded to.

You should keep the default variant size.

Erel · Mar 28, 2016

You can see a simple example here: https://www.b4x.com/android/forum/t...xible-list-based-on-scrollview.19567/#content

LucaMs · Mar 28, 2016

Erel said:
You can see a simple example here: https://www.b4x.com/android/forum/t...xible-list-based-on-scrollview.19567/#content

The problem is the item height.

In your example ("class-custom....") you set it to 70dip "arbitrarily", but the height of item views is 40dip, so I get:

(phone & tablet):

I tried to "get" the item height in advance some way (#3) but the views' style is lost.

Erel · Mar 28, 2016

The layout width and height are always determined by the parent. So you must explicitly set them yourself.

LucaMs · Mar 28, 2016

Erel said:
The layout width and height are always determined by the parent. So you must explicitly set them yourself.

As you can see the look is bad (I would have to post the landscape phone screenshot)

How can I get (in your example) items having the same look (proportions, distances from edges)? Using percentages?
[Please, start a new thread for this question or should I post it there?]

LucaMs · Mar 28, 2016

LucaMs said:
How can I get (in your example) items having the same look (proportions, distances from edges)? Using percentages?

Solved

Tablet:

Phone:

Main change:

B4X:

Sub CreateListItem(ToGetItemHeight As Boolean, Text As String, Width As Int, Height As Int) As Panel
    Dim p As Panel
    p.Initialize("")
    If ToGetItemHeight Then
        'we need to add the panel to a parent. It will be removed after the layout is loaded.
        Activity.AddView(p, 0, 0, 0, 0)
        p.LoadLayout("CellItem")
        mCLV2ItemHeight = Button1.Height
    Else
        'we need to add the panel to a parent to set its dimensions. It will be removed after the layout is loaded.
        Activity.AddView(p, 0, 0, Width, Height)
        p.LoadLayout("CellItem")
    End If
    p.RemoveView
    'label1 and button1 will point to the last added views.
    Label1.Text = Text
    Button1.Text = "Click"
    Return p
End Sub

LucaMs · Mar 28, 2016

In this way it is "more correct".

B4X:

Sub CreateListItem(ToGetItemHeight As Boolean, Text As String, Width As Int, Height As Int) As Panel
    Dim p As Panel
    p.Initialize("")
    If ToGetItemHeight Then
        Activity.AddView(p, 0, 0, 0, 0)
        p.LoadLayout("CellItem")
        mCLV2ItemHeight = Button1.Height
    Else
        'we need to add the panel to a parent to set its dimensions. It will be removed after the layout is loaded.
        Activity.AddView(p, 0, 0, Width, Height)
        p.LoadLayout("CellItem")
        'label1 and button1 will point to the last added views.
        Label1.Text = Text
        Button1.Text = "Click"
    End If
    p.RemoveView
    Return p
End Sub

Android Question Designer - minimum layout height - B4A 5.80

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