Well!!
This question is pretty old but still if someone is looking for the answer(in 2015) on how to apply custom font to all the Textviews through xml code directly see below:
First:
we need to add custom font inside assets folder inside your app directory:
.ttf or .otf both work in case of Android
Second:
Create Class CustomTextView which extends TextView like below:
public class CustomTextView extends TextView {
public CustomTextView(Context context) {
super(context);
}
public CustomTextView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public CustomTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public void setTypeface(Typeface tf) {
super.setTypeface(FontCache.getFont(getContext(),"fonts/<font_name>"));
}
}
Third:
FontCache class being used inside CustomTextView's setTypeface() method.Purpose is to do basic Font Caching using HashMap:
public class FontCache {
private static Map<String,Typeface> fontMap = new HashMap<String,Typeface>();
public static Typeface getFont(Context context,String fontname){
if(fontMap.containsKey(fontname)){
return fontMap.get(fontname);
}
else{
Typeface tf = Typeface.createFromAsset(context.getAssets(),fontname);
fontMap.put(fontname,tf);
return tf;
}
}
}
Fourth:[Final step]
All we do now is use the CustomTextView directly inside our xml file wherever custom font textview is required:
<<package_name>.CustomTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Custom Font Text"
android:textSize ="18sp"
android:textAppearance="?android:textAppearanceSmall"
android:id="@+id/custom_txt"
/>
Sorry, if this has already been posted somewhere on SO. Just thought to share if it helps someone!!