CODEWITHSUNDEEP
androidtexttextviewpaintfont-size
Steve Cortis
Steve Cortis

Reputation: 532

Finding the height of the line spacing

I have the following code to find the screen dimensions calculate how much text fits on the screen.

Now I need to know how many lines fit on the screen. I have the size of the text from the ascent to the descent. I need to know the height of the line spacing. getFontSpacing also gives the value from the ascent to the descent.

Does anyone know if there is a way of finding the line spacing's value?

    //Code for Getting screen Dimensions
    Display display = getWindowManager().getDefaultDisplay();
    Point size = new Point();
    display.getSize(size);
    int width = size.x;
    int height = size.y;

    //Breaking Text When Width Is Filled
    Paint p = new Paint();
    p.setTextSize(60);
    int textNum = p.breakText(sText, 0, 20, forOrBack, width, null);

    //Working Out How Many Lines Can Be Entered In The Screen
    float fHeight = p.descent() - p.ascent();
    int tHeight = (int) fHeight;
    int numLines = height/tHeight;

Upvotes: 3

Views: 5532

Answers (3)

arul
arul

Reputation: 300

For line spacing use textView.getLineHeight();

reference : http://developer.android.com/reference/android/widget/TextView.html#getLineHeight()

Upvotes: 3

Maurycy
Maurycy

Reputation: 3961

The following will return the recommended line spacing

textView.getPaint().getFontSpacing()

you can get the height of you text several ways. I prefer paint's getTextBounds method and just add the two values together

Upvotes: 3

cyanide
cyanide

Reputation: 3964

Paint.FontMetrics fm = paint.getFontMetrics();
float fullHeight = fm.top - fm.bottom;

As far as I remember, fm.bottom < 0, therefore by subtracting you actually get 

Math.abs(fm.top) + Math.abs(fm.bottom)

This value is bigger than ascent-descent, and, I guess, it is the actual line size.

You may consider using TextView.getLineHeight() after setting TextSize and preferebly after layout is complete (e.g in OnWindowFocusChanged).

Upvotes: 2

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