Change font size at run time android

Question

I have one textview and it has size as 32sp in xml.

android:textSize="32sp"

I wanted to change it as 28sp programmatically. So i used the below code.

txt.setTextSize(TypedValue.COMPLEX_UNIT_SP, getResources().getDimension(R.dimen.twenty_eight_sp));

But the above code is adding the 28sp to 32sp. So the font became too large. I don't want to add the font size, I want to set a new font size.

Can anyone suggest me.

use TypedValue.COMPLEX_UNIT_PX instead of TypedValue.COMPLEX_UNIT_SP refer this https://stackoverflow.com/questions/14540293/get-dimension-from-xml-and-set-text-size-in-runtime?answertab=active#tab-top — nik, Nov 16 '18 at 05:50

score 8 · Answer 1 · edited Nov 16 '18 at 05:54

8

You have to change it to TypedValue.COMPLEX_UNIT_PX because getDimension(id) returns a dimen value from resources and implicitly converted to px.

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

edited Nov 16 '18 at 05:54

AskNilesh

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answered Nov 16 '18 at 05:53

Rashpal Singh

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score 1 · Answer 2 · edited Nov 16 '18 at 05:54

1

txt.setTextSize(TypedValue.COMPLEX_UNIT_SP,getResources().getDimension(R.dimen.twenty_eight_sp));

edited Nov 16 '18 at 05:54

AskNilesh

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answered Nov 16 '18 at 05:52

Sari Masri

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score 1 · Answer 3 · answered Nov 16 '18 at 06:01

1

check this link https://developer.android.com/reference/android/widget/TextView#setTextSize(int,%20float)

consider both functions as per your requirement

answered Nov 16 '18 at 06:01

Harsh

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score 1 · Answer 4 · answered Dec 31 '18 at 05:04

1

Try this

txt_home.setTextSize(12);

answered Dec 31 '18 at 05:04

Android Geek

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Change font size at run time android

4 Answers4