TextView - setting the text size programmatically doesn t seem to work

Question

I am using Eclipse Indigo  testing on 2 emulators 2 2 and 3 0    the code below shows what I am testing now  however setting the text size reveals nothing on the screen when trying to run the emulator  if i comment out the text size the text shows up with a red color   I thought that somehow eclipse wasn t rebuilding the code but i added the line of code to add the blue background and that worked  I have tried setting the text size after setting the text with still no success  the code is below  thanks for your help    disclaimer  - i am trying to stay away from xml  Being that i already know java i don t want to depend on that    import android app Activity  import android graphics Color  import android os Bundle  import android widget TextView   public class TestAndroidvs2Activity extends Activity       Called when the activity is first created      Override public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       TextView text   new TextView this       text setTextColor Color RED       text setTextSize 2           text setBackgroundColor Color BLUE       text setText  Hello Android          setContentView text

User · Answer

In Kotlin  you can use simply use like this  textview textSize   20f

User · Answer

Currently  setTextSize float size  method will work well so we don t need to use another method for change text size  android widget TextView java source code         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         lt p gt Note  if this TextView has the auto-size feature enabled than this function is no-op         param size The scaled pixel size         attr ref android R styleable TextView textSize      android view RemotableViewMethod public void setTextSize float size        setTextSize TypedValue COMPLEX UNIT SP  size       Example using  textView setTextSize 20      set your text size   20sp

User · Answer

the method TextView setTextSize int unit   float size   takes two parameters    Try this    text setTextSize TypedValue COMPLEX UNIT SP 14     refer this and this   UPDATE   Now the setTextSize float size  will set the text size automatically in  scaled pixel  units  no need to mention the COMPLEX UNIT SP manually  Refer to the documentation

User · Answer

Text size 2 will be practically invisible  Try it with 14 at least  BTW  using xml has a lot of advantages and will make your life easier once you need to do anything more complex than  Hello World

User · Answer

Please see this link for more information on setting the text size in code  Basically it says      public void setTextSize  int unit  float size       Since  API Level 1 Set the default text size to a given unit and   value  See TypedValue for the possible dimension units  Related XML   Attributes      android textSize Parameters      unit  The desired dimension unit     size  The desired size in the given units

User · Answer

This fixed the issue for me  I got uniform font size across all devices    textView setTextSize TypedValue COMPLEX UNIT PX getResources   getDimension R dimen font

User · Answer

In My Case Used this Method   public static float pxFromDp float dp  Context mContext        return dp   mContext getResources   getDisplayMetrics   density      Here Set TextView s TextSize Programatically     textView setTextSize pxFromDp 18  YourActivity this      Keep Enjoying

[android] TextView - setting the text size programmatically doesn't seem to work

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