How to set a custom font for the entire application in Android

Question

Ok so I have research this and found some code relating to the topic but it doesn't seem to work when I try. I have been individually had to change the font for each text view and it's driving me insane. What I have done so far is create a class that will overide the font:

public final class FontsOverride {

public static void setDefaultFont(Context context,
                                  String staticTypefaceFieldName, String fontAssetName) {
    final Typeface regular = Typeface.createFromAsset(context.getAssets(),
            fontAssetName);
    replaceFont(staticTypefaceFieldName, regular);
}

protected 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();
    }
}
}

And then each time I wish to overide the font in each class I tried to implemnt this:

   FontsOverride.setDefaultFont(this, "DEFAULT", "ComicRelief.ttf");

There has to be simple way to do this I've been trying for hours and just can't get my head around it.

Possible duplicate of [Android - Using Custom Font](http://stackoverflow.com/questions/3651086/android-using-custom-font) — Ajit Kumar Dubey, Nov 28 '15 at 11:43
yes as told by shriram you can use a style to set the font... and apply this style to all that components you want to change font — sud, Nov 28 '15 at 11:52
Is there no simple way to override the font to avoid this as there will be a lot of styles and I will surely forget to override it each time — Eoin Ó Cribín, Nov 28 '15 at 11:58

mjp66 · Answer 1 · 2015-11-28T12:12:08.533

Just create a custom TextView class:

public class CustomTextView extends TextView {

    public CustomTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        load();
    }

    public CustomTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        load();
    }

    public CustomTextView(Context context) {
        super(context);
        load();
    }

    public void load() {
        setTypeface(
            Typeface.createFromAsset(getContext().getAssets(), "pacifico.ttf"), 1
        );
    }

}

Apply the custom view for whichever TextView you wish:

<com.your.package.views.CustomTextView
    android:id="@+id/my_text_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

Your TextView type is now declared and cast to CustomTextView:

CustomTextView myTextView = (CustomTextView) findViewById(R.id.my_text_view);

And remember to place the appropriate font into your assets folder (in this example, it's "pacifico.ttf").

Is there no way of just doing this once instead of having to implement it for each text view? — Eoin Ó Cribín, Nov 29 '15 at 10:17

score 0 · Answer 2 · answered Jan 24 '17 at 16:11

What you need to use is the Calligraphy library to set a custom font for the entire app.

In your custom Application class, init Calligraphy inside onCreate():

CalligraphyConfig.initDefault(new CalligraphyConfig.Builder()
                        .setDefaultFontPath("fonts/custom_font.ttf")
                        .setFontAttrId(R.attr.fontPath)
                        .build());

Here, custom_font.ttf is the font you want to apply to the entire app, and it needs to reside inside assets/fonts folder.

Secondly, you need to override the attachBaseContext() method in your Activity classes as follows:

@Override
protected void attachBaseContext(Context newBase) {
    super.attachBaseContext(CalligraphyContextWrapper.wrap(newBase));
}

Now, each and every text you see in your app has the font you set as default through Calligraphy.

How to set a custom font for the entire application in Android

2 Answers2