How to change the font on the TextView?

Question

How to change the font in a TextView, as default it\'s shown up as Arial? How to change it to Helvetica?

Answer 1

Best practice is to use Android Support Library version 26.0.0 or above.

STEP 1: add font file

1. In res folder create new font resource dictionary
2. Add font file (.ttf, .orf)

For example, when font file will be helvetica_neue.ttf that will generates R.font.helvetica_neue

STEP 2: create font family

1. In font folder add new resource file
2. Enclose each font file, style, and weight attribute in the element.

For example:

<?xml version="1.0" encoding="utf-8"?>
<font-family xmlns:android="http://schemas.android.com/apk/res/android">
    <font
        android:fontStyle="normal"
        android:fontWeight="400"
        android:font="@font/helvetica_neue" />
</font-family>

STEP 3: use it

In xml layouts:

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:fontFamily="@font/my_font"/>

Or add fonts to style:

<style name="customfontstyle" parent="@android:style/TextAppearance.Small">
    <item name="android:fontFamily">@font/lobster</item>
</style>

For more examples you can follow documentation:

Working with fonts

Answer 2

Maybe something a bit simpler:

public class Fonts {
  public static HashSet<String,Typeface> fonts = new HashSet<>();

  public static Typeface get(Context context, String file) {
    if (! fonts.contains(file)) {
      synchronized (this) {
        Typeface typeface = Typeface.createFromAsset(context.getAssets(), name);
        fonts.put(name, typeface);
      }
    }
    return fonts.get(file);
  }
}

// Usage
Typeface myFont = Fonts.get("arial.ttf");

(Note this code is untested, but in general this approach should work well.)

Answer 3

get font from asset and set to all children

public static void overrideFonts(final Context context, final View v) {
    try {
        if (v instanceof ViewGroup) {
            ViewGroup vg = (ViewGroup) v;
            for (int i = 0; i < vg.getChildCount(); i++) {
                View child = vg.getChildAt(i);
                overrideFonts(context, child);
         }
        } else if (v instanceof TextView ) {
            ((TextView) v).setTypeface(Typeface.createFromAsset(context.getAssets(),"DroidNaskh.ttf"));// "BKOODB.TTF"));
        }
    } catch (Exception e) {
 }
 } 

Answer 4

import java.lang.ref.WeakReference;
import java.util.HashMap;

import android.content.Context;
import android.graphics.Typeface;

public class FontsManager {

    private static FontsManager instance;

    private static HashMap<String, WeakReference<Typeface>> typefaces = new HashMap<String, WeakReference<Typeface>>();

    private static Context context;

    private FontsManager(final Context ctx) {
        if (context == null) {
            context = ctx;
        }
    }

    public static FontsManager getInstance(final Context appContext) {
        if (instance == null) {
            instance = new FontsManager(appContext);
        }
        return instance;
    }

    public static FontsManager getInstance() {
        if (instance == null) {
            throw new RuntimeException(
                    "Call getInstance(Context context) at least once to init the singleton properly");
        }
        return instance;
    }

    public Typeface getFont(final String assetName) {
        final WeakReference<Typeface> tfReference = typefaces.get(assetName);
        if (tfReference == null || tfReference.get() == null) {
            final Typeface tf = Typeface.createFromAsset(context.getResources().getAssets(),
                    assetName);
            typefaces.put(assetName, new WeakReference<Typeface>(tf));
            return tf;
        }
        return tfReference.get();
    }

}

This way, you can create a View which inherits from TextView and calls setTypeface on its constructor.