How to assign text size in sp value using java code

Question

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

User · Accepted Answer

http   developer android com reference android widget TextView html setTextSize 28int  20float 29   Example   textView setTextSize TypedValue COMPLEX UNIT SP  65

User · Answer

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        else         r   c getResources         setRawTextSize TypedValue applyDimension          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

User · Answer

semeTextView setTextSize TypedValue COMPLEX UNIT PX                          context getResources   getDimension R dimen text size in dp

User · Answer

This is code for the convert PX to SP format  100  Works  view setTextSize TypedValue COMPLEX UNIT PX  24

User · Answer

Cleaner and more reusable approach is  define text size in dimens xml file inside res values  directory     lt  resources gt      lt dimen name  text medium  gt 14sp lt  dimen gt   lt  resources gt    and then apply it to the TextView   textView setTextSize TypedValue COMPLEX UNIT PX  context getResources   getDimension R dimen text medium

User · Answer

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

User · Answer

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

User · Answer

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   On non-HD Device  desiredSp is still 25  density   1 On HD Device like Nexus 7 2nd Generation   desiredSp becomes 50 ish  density   2

User · Answer

You can use a DisplayMetrics object to help convert between pixels and scaled pixels with the scaledDensity attribute   DisplayMetrics dm   new DisplayMetrics    getWindowManager   getDefaultDisplay   getMetrics dm   pixelSize    int scaledPixelSize   dm scaledDensity

User · Answer

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

User · Answer

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  textPaint setTextSize textSize

[android] How to assign text size in sp value using java code

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