Custom fonts and XML layouts Android

Question

I m trying to define a GUI layout using XML files in Android  As far as I can find out  there is no way to specify that your widgets should use a custom font  e g  one you ve placed in assets font   in XML files and you can only use the system installed fonts   I know that  in the Java code  I could change the font of each widget manually using unique IDs  Alternatively  I could iterate over all the widgets in Java to make this change  but this would probably be very slow   What other options do I have  Is there any better ways to making widgets that have a custom look  I don t particularly want to have to manually change the font for every new widget I add

User · Answer

Extend TextView and give it a custom attribute or just use the android tag attribute to pass in a String of what font you want to use   You will need to pick a convention and stick to it such as I will put all of my fonts in the res assets fonts  folder so your TextView class knows where to find them   Then in your constructor you just set the font manually after the super call

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You can t extend TextView to create a widget or use one in a widgets layout  http   developer android com guide topics appwidgets index html

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If you only have one typeface you would like to add  and want less code to write  you can create a dedicated TextView for your specific font  See code below   package com yourpackage  import android content Context  import android graphics Typeface  import android util AttributeSet  import android widget TextView   public class FontTextView extends TextView       public static Typeface FONT NAME        public FontTextView Context context            super context           if FONT NAME    null  FONT NAME   Typeface createFromAsset context getAssets     fonts FontName otf            this setTypeface FONT NAME             public FontTextView Context context  AttributeSet attrs            super context  attrs           if FONT NAME    null  FONT NAME   Typeface createFromAsset context getAssets     fonts FontName otf            this setTypeface FONT NAME             public FontTextView Context context  AttributeSet attrs  int defStyle            super context  attrs  defStyle           if FONT NAME    null  FONT NAME   Typeface createFromAsset context getAssets     fonts FontName otf            this setTypeface FONT NAME             In main xml  you can now add your textView like this    lt com yourpackage FontTextView     android id    id tvTimer      android layout width  wrap content      android layout height  wrap content      android text      gt

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I m 3 years late for the party    However this could be useful for someone who might stumble upon this post   I ve written a library that caches Typefaces and also allow you to specify custom typefaces right from XML  You can find the library here   Here is how your XML layout would look like  when you use it    lt com mobsandgeeks ui TypefaceTextView     android layout width  wrap content      android layout height  wrap content      android text   string hello world      geekui customTypeface  fonts custom font ttf    gt

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There are two ways to customize fonts        my custom font in assets fonts iran sans ttf  Way 1   Refrection Typeface class     best way  call FontsOverride setDefaultFont   in class extends Application  This code will cause all software fonts to be changed  even Toasts fonts    AppController java  public class AppController extends Application         Override     public void onCreate             super onCreate               Initial Font         FontsOverride setDefaultFont getApplicationContext     MONOSPACE    fonts iran sans ttf               FontsOverride java  public class FontsOverride        public static void setDefaultFont Context context  String staticTypefaceFieldName  String fontAssetName            final Typeface regular   Typeface createFromAsset context getAssets    fontAssetName           replaceFont staticTypefaceFieldName  regular              private static void replaceFont String staticTypefaceFieldName  final Typeface newTypeface            try               final Field staticField   Typeface class getDeclaredField staticTypefaceFieldName               staticField setAccessible true               staticField set null  newTypeface             catch  NoSuchFieldException e                e printStackTrace              catch  IllegalAccessException e                e printStackTrace                          Way 2  use setTypeface  for special view just call setTypeface   to change font   CTextView java  public class CTextView extends TextView        public CTextView Context context            super context           init context null              public CTextView Context context   Nullable AttributeSet attrs            super context  attrs           init context attrs              public CTextView Context context   Nullable AttributeSet attrs  int defStyleAttr            super context  attrs  defStyleAttr           init context attrs               RequiresApi api   Build VERSION CODES LOLLIPOP      public CTextView Context context   Nullable AttributeSet attrs  int defStyleAttr  int defStyleRes            super context  attrs  defStyleAttr  defStyleRes           init context attrs              public void init Context context   Nullable AttributeSet attrs             if  isInEditMode                return              use setTypeface for change font this view         setTypeface FontUtils getTypeface  fonts iran sans ttf                FontUtils java  public class FontUtils        private static Hashtable lt String  Typeface gt  fontCache   new Hashtable lt  gt          public static Typeface getTypeface String fontName            Typeface tf   fontCache get fontName           if  tf    null                try                   tf   Typeface createFromAsset AppController getInstance   getApplicationContext   getAssets    fontName                 catch  Exception e                    e printStackTrace                    return null                            fontCache put fontName  tf                     return tf

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Fontinator is an Android-Library make it easy  to use custom Fonts  https   github com svendvd Fontinator

User · Answer

The best way to do it From Android O preview release is this way   1  Right-click the res folder and go to New   Android resource directory  The New Resource Directory window appears  2  In the Resource type list  select font  and then click OK  3  Add your font files in the font folder The folder structure below generates R font dancing script  R font la la  and R font ba ba  4  Double-click a font file to preview the file s fonts in the editor   Next we must create a font family  1  Right-click the font folder and go to New   Font resource file  The New Resource File window appears  2  Enter the file name  and then click OK  The new font resource XML opens in the editor  3  Enclose each font file  style  and weight attribute in the font tag element  The following XML illustrates adding font-related attributes in the font resource XML    lt  xml version  1 0  encoding  utf-8   gt   lt font-family xmlns android  http   schemas android com apk res android  gt       lt font     android fontStyle  normal      android fontWeight  400      android font   font hey regular    gt       lt font     android fontStyle  italic      android fontWeight  400      android font   font hey bababa    gt   lt  font-family gt    Adding fonts to a TextView       lt TextView     android layout width  wrap content      android layout height  wrap content        android fontFamily   font ba ba     gt    As from the documentation      Working With Fonts   all the steps are correct

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The only way to use custom fonts is through the source code   Just remember that Android runs on devices with very limited resources and fonts might require a good amount of RAM  The built-in Droid fonts are specially made and  if you note  have many characters and decorations missing

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Old question  but I sure wish I read this answer here before I started my own search for a good solution  Calligraphy extends the android fontFamily attribute to add support for custom fonts in your asset folder  like so    lt TextView    android text   string hello world    android layout width  wrap content    android layout height  wrap content    android fontFamily  fonts Roboto-Bold ttf   gt    The only thing you have to do to activate it is attaching it to the Context of the Activity you re using    Override protected void attachBaseContext Context newBase        super attachBaseContext new CalligraphyContextWrapper newBase        You can also specify your own custom attribute to replace android fontFamily  It also works in themes  including the AppTheme

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I might have a simple answer for the question without extending the TextView and implementing a long code   Code     TextView tv    TextView  findViewById R id textview1       tv setTypeface Typeface createFromAsset getAssets     font ttf       Place the custom font file in assets folder as usual and try this  It works for me  I just dont understand why peter has given such a huge code for this simple thing or he has given his answer in old version

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It may be useful to know that starting from Android 8 0  API level 26  you can use a custom font in XML   You can apply a custom font to the entire application in the following way    Put the font in the folder res font  In res values styles xml use it in the application theme    lt style name  AppTheme  parent   whatever you like   gt       lt item name  android fontFamily  gt  font myfont lt  item gt   lt  style gt

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Here s a tutorial that shows you how to setup a custom font like  peter described   http   responsiveandroid com 2012 03 15 custom-fonts-in-android-widgets html  it also has consideration for potential memory leaks ala http   code google com p android issues detail id 9904     Also in the tutorial is an example for setting a custom font on a button

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Also can be defined in the xml without creating custom classes  style xml   lt style name  ionicons  parent  android TextAppearance  gt       lt  -- Custom Attr-- gt       lt item name  fontPath  gt fonts ionicons ttf lt  item gt   lt  style gt    activity main xml   lt LinearLayout xmlns android  http   schemas android com apk res android                xmlns app  http   schemas android com apk res-auto                android layout width  match parent                android layout height  match parent                android orientation  vertical   gt       lt Button         android layout width  wrap content          android layout height  wrap content          android textAppearance   style ionicons          android text      gt   lt  LinearLayout gt    A quick note  because I just always forgot where to put the fonts  its that the font must be inside assets and this folder resides in the same level that res and src  in my case its assets fonts ionicons ttf  Updated Added root layout because this method needs xmlns app  http   schemas android com apk res-auto  to work  Update 2 Forgot about a library that I ve installed before called Calligraphy

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Peter s answer is the best  but it can be improved by using the styles xml from Android to customize your fonts for all textviews in your app   My code is here

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You can make easily custom textview class  -  So what you need to do first  make Custom textview class which extended with AppCompatTextView   public class CustomTextView extends AppCompatTextView       private int mFont   FontUtils FONTS NORMAL      boolean fontApplied       public CustomTextView Context context  AttributeSet attrs  int defStyle            super context  attrs  defStyle           init attrs  context              public CustomTextView Context context  AttributeSet attrs            super context  attrs           init attrs  context              public CustomTextView Context context            super context           init null  context              protected void init AttributeSet attrs  Context cxt            if   fontApplied                if  attrs    null                    mFont   attrs getAttributeIntValue                           http   schemas android com apk res-auto    Lato-Regular ttf                           -1                             Typeface typeface   getTypeface                int typefaceStyle   Typeface NORMAL              if  typeface    null                    typefaceStyle   typeface getStyle                              if  mFont  gt  FontUtils FONTS                    typefaceStyle   mFont                            FontUtils applyFont this  typefaceStyle               fontApplied   true                      Now   every time Custom text view call and we will get int value from attribute int fontValue   attrs getAttributeIntValue  http   schemas android com apk res-auto   Lato-Regular ttf  -1    Or  We can also get getTypeface   from view which we set in our xml  android textStyle  bold normal italic    So do what ever you want to do   Now  we make FontUtils for set any  ttf font into our view   public class FontUtils        public static final int FONTS   1      public static final int FONTS NORMAL   2      public static final int FONTS BOLD   3      public static final int FONTS BOLD1   4       private static Map lt String  Typeface gt  TYPEFACE   new HashMap lt String  Typeface gt          static Typeface getFonts Context context  String name            Typeface typeface   TYPEFACE get name           if  typeface    null                typeface   Typeface createFromAsset context getAssets    name               TYPEFACE put name  typeface                     return typeface             public static void applyFont TextView tv  int typefaceStyle             Context cxt   tv getContext            Typeface typeface           if typefaceStyle    Typeface BOLD ITALIC                typeface   FontUtils getFonts cxt   FaktPro-Normal ttf             else if  typefaceStyle    Typeface BOLD    typefaceStyle    SD FONTS BOLD   typefaceStyle    FONTS BOLD1                typeface   FontUtils getFonts cxt   FaktPro-SemiBold ttf              else if  typefaceStyle    Typeface ITALIC                typeface   FontUtils getFonts cxt   FaktPro-Thin ttf              else               typeface   FontUtils getFonts cxt   FaktPro-Normal ttf                      if  typeface    null                tv setTypeface typeface

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You can extend TextView to set custom fonts as I learned here   TextViewPlus java    package com example   import android content Context  import android content res TypedArray  import android graphics Typeface  import android util AttributeSet  import android util Log  import android widget TextView   public class TextViewPlus extends TextView       private static final String TAG    TextView        public TextViewPlus Context context            super context              public TextViewPlus Context context  AttributeSet attrs            super context  attrs           setCustomFont context  attrs              public TextViewPlus Context context  AttributeSet attrs  int defStyle            super context  attrs  defStyle           setCustomFont context  attrs              private void setCustomFont Context ctx  AttributeSet attrs            TypedArray a   ctx obtainStyledAttributes attrs  R styleable TextViewPlus           String customFont   a getString R styleable TextViewPlus customFont           setCustomFont ctx  customFont           a recycle               public boolean setCustomFont Context ctx  String asset            Typeface tf   null          try           tf   Typeface createFromAsset ctx getAssets    asset               catch  Exception e                Log e TAG   Could not get typeface    e getMessage                 return false                     setTypeface tf             return true             attrs xml   in res values    lt  xml version  1 0  encoding  utf-8   gt   lt resources gt       lt declare-styleable name  TextViewPlus  gt           lt attr name  customFont  format  string   gt       lt  declare-styleable gt   lt  resources gt    main xml    lt  xml version  1 0  encoding  utf-8   gt   lt LinearLayout      xmlns android  http   schemas android com apk res android      xmlns foo  http   schemas android com apk res com example      android orientation  vertical  android layout width  fill parent      android layout height  fill parent  gt        lt com example TextViewPlus         android id    id textViewPlus1          android layout height  match parent          android layout width  match parent          android text   string showingOffTheNewTypeface          foo customFont  saxmono ttf  gt       lt  com example TextViewPlus gt   lt  LinearLayout gt    You would put  saxmono ttf  in the assets folder   UPDATE 8 1 13  There are serious memory concerns with this method  See chedabob s comment below

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This might be a little late  but you need to create a singleton class that returns the custom typeface to avoid memory leaks   TypeFace class   public class OpenSans    private static OpenSans instance  private static Typeface typeface   public static OpenSans getInstance Context context        synchronized  OpenSans class            if  instance    null                instance   new OpenSans                typeface   Typeface createFromAsset context getResources   getAssets     open sans ttf                      return instance           public Typeface getTypeFace         return typeface        Custom TextView   public class NativelyCustomTextView extends TextView        public NativelyCustomTextView Context context            super context           setTypeface OpenSans getInstance context  getTypeFace                public NativelyCustomTextView Context context  AttributeSet attrs            super context  attrs           setTypeface OpenSans getInstance context  getTypeFace                public NativelyCustomTextView Context context  AttributeSet attrs              int defStyle            super context  attrs  defStyle           setTypeface OpenSans getInstance context  getTypeFace                By xml    lt com yourpackage views NativelyCustomTextView             android id    id natively text view              android layout width  wrap content              android layout height  wrap content              android layout centerHorizontal  true              android layout margin  20dp              android text   string natively              android textSize  30sp    gt     Programmatically   TextView programmaticallyTextView    TextView          findViewById R id programmatically text view    programmaticallyTextView setTypeface OpenSans getInstance this                   getTypeFace

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Using DataBinding     BindingAdapter   bind font    public static void setFont TextView textView  String fontName    textView setTypeface Typeface createFromAsset textView getContext   getAssets     fonts     fontName        In XML    lt TextView app font     Source-Sans-Pro-Regular ttf    android layout width  wrap content  android layout height  wrap content   gt    font file must be in assets fonts

[java] Custom fonts and XML layouts (Android)

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