How to assign text size in sp value using java code

If I assign an integer value to change a certain text size of a TextView using java code, the value is interpreted as pixel (px).

Now does anyone know how to assign it in sp?

Asked by: Audrey519 | Posted: 20-01-2022

Answer 1,%20float%29


textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 65);

Answered by: Roland353 | Posted: 21-02-2022

Answer 2

Cleaner and more reusable approach is

define text size in dimens.xml file inside res/values/ directory:

   <dimen name="text_medium">14sp</dimen>

and then apply it to the TextView:

textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, context.getResources().getDimension(R.dimen.text_medium));

Answered by: Emily260 | Posted: 21-02-2022

Answer 3

You can use a DisplayMetrics object to help convert between pixels and scaled pixels with the scaledDensity attribute.

DisplayMetrics dm = new DisplayMetrics();
pixelSize = (int)scaledPixelSize * dm.scaledDensity; 

Answered by: Walter346 | Posted: 21-02-2022

Answer 4

Based on the the source code of setTextSize:

public void setTextSize(int unit, float size) {
    Context c = getContext();
    Resources r;

    if (c == null)
        r = Resources.getSystem();
        r = c.getResources();

        unit, size, r.getDisplayMetrics()));

I build this function for calulating any demension to pixels:

int getPixels(int unit, float size) {
    DisplayMetrics metrics = Resources.getSystem().getDisplayMetrics();
    return (int)TypedValue.applyDimension(unit, size, metrics);

Where unit is something like TypedValue.COMPLEX_UNIT_SP.

Answered by: Sophia302 | Posted: 21-02-2022

Answer 5

When the accepted answer doesn't work (for example when dealing with Paint) you can use:

float spTextSize = 12;
float textSize = spTextSize * getResources().getDisplayMetrics().scaledDensity;

Answered by: Abigail476 | Posted: 21-02-2022

Answer 6

By default setTextSize, without units work in SP (scales pixel)

public void setTextSize (float size)

Added in API level 1 Set the default text size to the given value, interpreted as "scaled pixel" units. This size is adjusted based on the current density and user font size preference.

Answered by: Freddie119 | Posted: 21-02-2022

Answer 7

Thanks @John Leehey and @PeterH:

desiredSp = getResources().getDimension(R.dimen.desired_sp);
density = getResources().getDisplayMetrics().density;
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, desiredSp / density);

The thing is if you define R.dimen.desired_sp to 25 in your dimen.xml

  1. On non-HD Device: desiredSp is still 25, density = 1
  2. On HD Device(like Nexus 7 2nd Generation): desiredSp becomes 50 ish, density = 2

Answered by: Miranda354 | Posted: 21-02-2022

Answer 8


Answered by: Sienna645 | Posted: 21-02-2022

Answer 9

This is code for the convert PX to SP format. 100% Works

view.setTextSize(TypedValue.COMPLEX_UNIT_PX, 24);

Answered by: Adelaide923 | Posted: 21-02-2022

Answer 10

From Api level 1, you can use the public void setTextSize (float size) method.

From the documentation:

Set the default text size to the given value, interpreted as "scaled pixel" units. This size is adjusted based on the current density and user font size preference.

Parameters: size -> float: The scaled pixel size.

So you can simple do:

textView.setTextSize(12); // your size in sp

Answered by: Emily577 | Posted: 21-02-2022

Answer 11

After trying all the solutions and none giving acceptable results (maybe because I was working on a device with default very large fonts), the following worked for me (COMPLEX_UNIT_DIP = Device Independent Pixels):

textView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 14);

Answered by: Emily112 | Posted: 21-02-2022

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