Android Question Listview label height

[LucaMs]

I would like to adjust the height of a label in a listview.

I found answers that recommend using the MeasureMultilineTextHeight of the StringUtils library, but I would like to avoid adding another library to my project.

Could someone extrapolate the function and add it to the Code snippets forum?

Thanks

 

[LucaMs]

I tried this code:

Dim cnv As Canvas
Dim lbl As Label = ListView1.TwoLinesLayout.SecondLabel
cnv.Initialize(lbl)
Dim CanvasStringHeight As Float
CanvasStringHeight = cnv.MeasureStringHeight(Note, lbl.Typeface, lbl.TextSize)
Log("CanvasStringHeight = " & CanvasStringHeight)

but I get this error:
java.lang.IllegalArgumentException: width and height must be > 0
at android.graphics.Bitmap.createBitmap(Bitmap.java:603)
...

for the statement: cnv.Initialize(lbl)

 

[DonManfred]

Klaus already did it, or not?

 

[eps]

Did you add this in code or the Designer?

You will need to set the height of the ListView, which you don't seem to have done in the code you've posted.

 

[LucaMs]

Yes, I set the heightS in the code.

I think I get the error because I should refer to a specific item, but there is not a function to get it:
ListView.GetItem returns text (though there is RemoveAt, damn )

Manfred, that routine does the opposite, fits the text height of the label, unfortunately

 

[eps]

ListView<X>.TwoLinesLayout.Label.Height is what you need to set

 

[DonManfred]

btw: luca, you only can set ONE height for Label and one height for SecondLabel in Listview.
Every item in the listview will have the same height (ListView<X>.TwoLinesLayout.Label.Height+ListView<X>.TwoLinesLayout.SecondLabel.Height)
You cannot set an different heigth for every listview-item

and this will be adapted to fontsize, color and so on too. Every item will look the same. It´s like "Little boxes"

 

[LucaMs]

damn... and canvas MeasureStringHeight also don't calculates the text height as i need.

Thanks for you help.

 

[eps]

btw: luca, you only can set ONE height for Label and one height for SecondLabel in Listview.
Every item in the listview will have the same height (ListView<X>.TwoLinesLayout.Label.Height+ListView<X>.TwoLinesLayout.SecondLabel.Height)
You cannot set an different heigth for every listview-item

and this we be adapted to fontsize, color and so on too. Every item will look the same.

Mostly yes you can only set the items once... however you can set two different sizes, but it is a bit of a fiddle.

Use TwoLinesLayout and TwoLinesAndBitmap - the two can be different, for the same ListView.

 

[LucaMs]

So, i should use a scrollview, since I can not have different heights for the items in the listview (I had forgotten this).

But how to calculate the height of a label depending on the text in it? (I have the impression that I have read the answer in the site, months ago)

 

[eps]

ScrollView is the way to go for lots of items which are different heights. or customlistview or tableview or ULV (chargeable from Informatix).

 

[LucaMs]

In conclusion:

I'll have to use a ScrollView and include the StringUtils library with its MeasureMultilineTextHeight function.

The first post is still valid

Thanks again.

 

[DonManfred]

Use TwoLinesLayout and TwoLinesAndBitmap - the two can be different, for the same ListView.

It will work on singlelinelayout and twolinelayout too... I use this to make categories in listview.

 

[klaus]

You cannot set the canvas to ListView1.TwoLinesLayout.SecondLabel because its Width = -1 by default to fit the parent view.

You could define:

Dim bmp as Bitmap
bmp.InitializeMutable(2, 2)
cnv.Initialize(bmp)

Using a small bitmap for the canvas to minimize memory consumption.

In CustomListView you have AddTextItem which adjusts the height automatically.

 

[LucaMs]

Thanks, Klaus.

(I'm sure you'll create the snippet )