Android - set TextView TextStyle programmatically

Question

Is there a way to set the textStyle attribute of a TextView programmatically  There doesn t appear to be a setTextStyle   method   To be clear  I am not talking about View   Widget styles  I am talking about the following    lt TextView   android id    id my text    android layout width  fill parent    android layout height  wrap content    android text  Hello World    android textStyle  bold    gt

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This worked for me  textview setTypeface textview getTypeface    Typeface BOLD     or   textview setTypeface Typeface DEFAULT BOLD

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textview setTypeface Typeface DEFAULT BOLD     setTypeface is the Attribute textStyle   As Shankar V added  to preserve the previously set typeface attributes you can use   textview setTypeface textview getTypeface    Typeface BOLD

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Kotlin Version  To retain current font in addition to text style   textView apply       setTypeface typeface  Typeface NORMAL         or     setTypeface typeface  Typeface BOLD         or     setTypeface typeface  Typeface ITALIC         or     setTypeface typeface  Typeface BOLD ITALIC

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This question is asked in a lot of places in a lot of different ways  I originally answered it here but I feel it s relevant in this thread as well  since i ended up here when I was searching for an answer    There is no one line solution to this problem  but this worked for my use case  The problem is  the  View context  attrs  defStyle   constructor does not refer to an actual style  it wants an attribute  So  we will    Define an attribute  Create a style that you want to use Apply a style for that attribute on our theme Create new instances of our view with that attribute   In  res values attrs xml   define a new attribute    lt  xml version  1 0  encoding  utf-8   gt   lt resources gt       lt attr name  customTextViewStyle  format  reference   gt           lt  resources gt        In res values styles xml  I m going to create the style I want to use on my custom TextView   lt style name  CustomTextView  gt       lt item name  android textSize  gt 18sp lt  item gt       lt item name  android textColor  gt  color white lt  item gt       lt item name  android paddingLeft  gt 14dp lt  item gt   lt  style gt    In  res values themes xml  or  res values styles xml   modify the theme for your application   activity and add the following style    lt resources gt       lt style name  AppBaseTheme  parent  android Theme Light  gt           lt item name   attr customTextViewStyle  gt  style CustomTextView lt  item gt       lt  style gt            lt  resources gt    Finally  in your custom TextView  you can now use the constructor with the attribute and it will receive your style  public class CustomTextView extends TextView        public CustomTextView Context context           super context  null  R attr customTextView             It s worth noting that I repeatedly used customTextView in different variants and different places  but it is in no way required that the name of the view match the style or the attribute or anything  Also  this technique should work with any custom view  not just TextViews

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I  ve resolved it with two simple methods   Follow the explanation   My existing style declaration    lt style name  SearchInfoText  gt       lt item name  android layout width  gt wrap content lt  item gt       lt item name  android layout height  gt wrap content lt  item gt       lt item name  android textSize  gt 24sp lt  item gt       lt item name  android textColor  gt  color Church Grey lt  item gt       lt item name  android shadowColor  gt  color Shadow Church lt  item gt       lt item name  android shadowRadius  gt 3 lt  item gt       lt item name  android shadowDx  gt 1 lt  item gt       lt item name  android shadowDy  gt 1 lt  item gt   lt  style gt    My Android Java code       TextView locationName   new TextView getSupportActivity         locationName setId IdGenerator generateViewId         locationName setText location getName         locationName setLayoutParams super centerHorizontal         locationName setTextSize 24f       locationName setPadding 0  0  0  15       locationName setTextColor getResources   getColor R color Church Grey        locationName setShadowLayer 3  1  1   getResources   getColor R color Shadow Church      Regards

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Let s say you have a style called RedHUGEText on your values styles xml    lt style name  RedHUGEText  parent   android style Widget TextView  gt       lt item name  android textSize  gt  dimen text size huge lt  item gt       lt item name  android textColor  gt  color red lt  item gt       lt item name  android textStyle  gt bold lt  item gt   lt  style gt    Just create your TextView as usual in the XML layout your layout xml file  let s say    lt TextView android id    id text view title       android layout width  fill parent       android layout height  wrap content      android text  FOO    gt    And in the java code of your Activity you do this   TextView textViewTitle    TextView  findViewById R id text view title   textViewTitle setTextAppearance this  R style RedHUGEText     It worked for me  And it applied color  size  gravity  etc  I ve used it on handsets and tablets with Android API Levels from 8 to 17 with no problems  Note that as of Android 23  that method has been deprecated  The context argument has been dropped  so the last line would need to be   textViewTitle setTextAppearance R style RedHUGEText     Remember    this is useful only if the style of the text really depends on a condition on your Java logic or you are building the UI  on the fly  with code    if it doesn t  it is better to just do    lt TextView android id    id text view title       android layout width  fill parent       android layout height  wrap content      android text  FOO       style   style RedHUGEText    gt    You can always have it your way

User · Answer

Since setTextAppearance resId  is only available for API 23 and above  use   TextViewCompat setTextAppearance textViewGoesHere  resId   This method is internally implemented as follows   public static void setTextAppearance  NonNull TextView textView   StyleRes int resId        if  Build VERSION SDK INT  gt   23            textView setTextAppearance resId         else           textView setTextAppearance textView getContext    resId

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Search for setTextAppearance or also setTextTypeface  There is similar question on stackoverflow  How to change a TextView  39 s style at runtime

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So many way to achieve this task some are below -  1   String text view str     lt b gt Bolded text lt  b gt    lt i gt italic text lt  i gt   even  lt u gt underlined lt  u gt     TextView tv    TextView findViewById R id ur text view id   tv setText Html fromHtml text view str      2   tv setTypeface null  Typeface BOLD   tv setTypeface null  Typeface ITALIC   tv setTypeface null  Typeface BOLD ITALIC   tv setTypeface null  Typeface NORMAL     3   SpannableString spannablecontent new SpannableString o content toString     spannablecontent setSpan new StyleSpan android graphics Typeface BOLD ITALIC                             0 spannablecontent length    0      set Text here tt setText spannablecontent     4    lt  xml version  1 0  encoding  utf-8   gt   lt resources gt        lt style name  boldText  gt           lt item name  android textStyle  gt bold italic lt  item gt           lt item name  android textColor  gt  FFFFFF lt  item gt       lt  style gt        lt style name  normalText  gt           lt item name  android textStyle  gt normal lt  item gt           lt item name  android textColor  gt  C0C0C0 lt  item gt       lt  style gt    lt  resources gt    tv setTextAppearance getApplicationContext    R style boldText     or if u want through xml  android textStyle  normal  android textStyle  normal bold  android textStyle  normal italic  android textStyle  bold  android textStyle  bold italic

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As mentioned here  this feature is not currently supported

User · Answer

You may try this one  if  Build VERSION SDK INT  gt   Build VERSION CODES M                    textView setTextAppearance R style Lato Bold                 else                   textView setTextAppearance getActivity    R style Lato Bold

[java] Android - set TextView TextStyle programmatically?

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