Android Question MeasureStringHeight

S

Sergey_New

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To set the label height I use this code
B4X: 
Dim cn As Canvas
cn.Initialize(Activity)
lbl.Height=cn.MeasureStringHeight("T", Typeface.DEFAULT,14)
To display correctly, the height of the label must be doubled.
Does it depend on the screen settings?
How to do it right?
 
Solution
Sergey_New said:
To display correctly, the height of the label must be doubled.
Click to expand...
This is because this function is only for single-line text.

Use this code snipped:

[B4X] MeasureMultilineTextHeight

I was looking for a way to determine the height of a textview when it has multiline text. This function now makes that possible across platforms. From B4J I come from this thread: https://www.b4x.com/android/forum/threads/measure-multiline-text-height.84331/#content Private Sub...
www.b4x.com

or use just this 2 lines:
B4X: 
Dim su As StringUtils
Return su.MeasureMultilineTextHeight(xLabel,xLabel.Text)
Note that it only works if the label you are using has its final width and the final font size, only then can the correct height be calculated.
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S

Sergey_New

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The width also needs to be increased.
Attached an example.
 

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  • test.zip
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Alexander Stolte

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Sergey_New said:
To display correctly, the height of the label must be doubled.
Click to expand...
This is because this function is only for single-line text.

Use this code snipped:

[B4X] MeasureMultilineTextHeight

I was looking for a way to determine the height of a textview when it has multiline text. This function now makes that possible across platforms. From B4J I come from this thread: https://www.b4x.com/android/forum/threads/measure-multiline-text-height.84331/#content Private Sub...
www.b4x.com

or use just this 2 lines:
B4X: 
Dim su As StringUtils
Return su.MeasureMultilineTextHeight(xLabel,xLabel.Text)
Note that it only works if the label you are using has its final width and the final font size, only then can the correct height be calculated.
 

Attachments

  • test.zip
    3 KB · Views: 106
Upvote 0
Solution
S

Sergey_New

Well-Known Member
Licensed User
Longtime User
Alexander Stolte said:
or use just this 2 lines:
Click to expand...
Thanks, this code returns the correct label height.
Alexander Stolte said:
This is because this function is only for single-line text.
Click to expand...
In my example, I corrected the value in the constructor to SingleLine=True.
Nothing has changed, the height will still need to be doubled.
Tell me, please, how to set the label width correctly?
 
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S

Sergey_New

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Longtime User
Alexander Stolte said:
you need to know the maximum amount of space your label can have
Click to expand...
Need to add border width?
There is still a question about the height of the one-line label, but this probably goes to the founding father.
 
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