Can you change the android keyboard text font programmatically?

Question

To be frank the title says it all really, I'm trying to change an input method service, KeyboardView key font. Of course.. it's not as simple as

android:keyTextFont="sans-serif".

Answer 1

import java.lang.reflect.Field; 
import android.content.Context;
import android.graphics.Typeface;

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();
    }
  }
}

add this class to your code.

public final class Application extends android.app.Application {
@Override
public void onCreate() {
    super.onCreate();
    FontsOverride.setDefaultFont(this, "DEFAULT", "fonts/GeezEdit.ttf");
    FontsOverride.setDefaultFont(this, "MONOSPACE", "fonts/GeezEdit.ttf");
    /*FontsOverride.setDefaultFont(this, "MONOSPACE", "MyFontAsset2.ttf");
    FontsOverride.setDefaultFont(this, "SERIF", "MyFontAsset3.ttf");
    FontsOverride.setDefaultFont(this, "SANS_SERIF", "MyFontAsset4.ttf");*/
  }
}

..... here you can see that the some fonts/fontname are added. These are the external font files which you can use to overrite into your keyboard view/labels.

add this Application name into the android manifest file application name

example

 <application
    android:name=".Application"
    android:allowBackup="false"
    android:installLocation="internalOnly"
    android:label="@string/ime_name"
    android:theme="@style/AppTheme" >.......

now update the above overrited font name into your style. base theme or the theme which you are using at your manifest application.

example

 <!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
    <item name="android:typeface">monospace</item>
</style>