java - How to set the font from Styles.xml in android -


what have:

  1. i have custom class inheriting appcompattextview.
  2. i have defined custom attribute textformat in attires.xml , passing font need set xml

stylefile

<style name="headerfiltername">         <item name="android:src">@drawable/back_button</item>         <item name="android:text">@string/str_filter_edit</item>         <item name="android:gravity">center</item>         <item name="android:textsize">@dimen/header_filter_name_text_size</item>         <item name="android:layout_weight">1</item>     </style>

xml 

    <customviews.customtfttextview     android:id="@+id/txtscreennameid"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     app:textformat="fonts/sf_san_fransisco.ttf"     style="@style/headerfiltername"/>

attr.xml

<?xml version="1.0" encoding="utf-8"?> <resources>     <declare-styleable name="customfont">         <attr name="textformat" format="string"/>     </declare-styleable> </resources>

customtfttextview.java

public class customtfttextview extends appcompattextview {     private string text;      public customtfttextview(final context context) {         this(context, null);         initialize(text,context);     }      public customtfttextview(final context context, final attributeset attrs) {         this(context, attrs, 0);         text = context.getresources().obtainattributes(attrs, r.styleable.customfont).getstring(r.styleable.customfont_textformat);         initialize(text,context);     }      public customtfttextview(final context context, final attributeset attrs, final int defstyle) {         super(context, attrs, defstyle);         text = context.getresources().obtainattributes(attrs, r.styleable.customfont).getstring(r.styleable.customfont_textformat);         initialize(text,context);     }      private void initialize(string format, context context) {          typeface mtypeface;         if (format != null)         {             mtypeface = typeface.createfromasset(context.getassets(), format);         }         else         {             mtypeface = typeface.createfromasset(context.getassets(), "fonts/sf_san_fransisco.ttf");         }         settypeface(mtypeface, typeface.normal);         setlinespacing(0.0f, 1.4f);     } }

while above code works perfect, if move app:textformat inside style file, font not setting.

<style name="headerfiltername">             <item name="android:src">@drawable/back_button</item>             <item name="android:text">@string/str_filter_edit</item>             <item name="textformat">@string/custom_font_medium </item> <item name="android:gravity">center</item>             <item name="android:textsize">@dimen/header_filter_name_text_size</item>             <item name="android:layout_weight">1</item>         </style>

strings.xml

<string name="custom_font_medium">fonts/sf_san_fransisco.ttf</string>

how achieve this

if check docs resources#obtainattributes() method, says:

retrieve set of basic attribute values attributeset, not performing styling of them using theme and/or style resources.

to attributes style applied, use context#obtainstyledattributes() method instead. advisable keep reference return, can recycle() when done. example:

typedarray = context.obtainstyledattributes(attrs, r.styleable.customfont); text = a.getstring(r.styleable.customfont_textformat); a.recycle();

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