set custom fonts in java

fontSetter.java

public class MyApplication extends Application {
 
 
    private Typeface normalFont;
    private Typeface boldFont;
 
    //FontSetter fontSetter = (FontSetter) getApplication();
    //TextView myTextView = (TextView) findViewById(R.id.my_textview);
    //application.setTypeface(myTextView);
 
    // -- Fonts -- //
    public void setTypeface(TextView textView) {
        if(textView != null) {
            if(textView.getTypeface() != null && textView.getTypeface().isBold()) {
                textView.setTypeface(getBoldFont());
            } else {
                textView.setTypeface(getNormalFont());
            }
        }
    }
 
    private Typeface getNormalFont() {
        if(normalFont == null) {
            normalFont = Typeface.createFromAsset(getAssets(),"fonts/my_font.ttf");
        }
        return this.normalFont;
    }
 
    private Typeface getBoldFont() {
        if(boldFont == null) {
            boldFont = Typeface.createFromAsset(getAssets(),"fonts/my_font_bold.ttf");
        }
        return this.boldFont;
    }
}