Set custom font on an android custom textview. Untested code, be sure to test.

Static typeface

public class TextHelper{
  
  private static TypeFace typeface = null;
  
  public static void setTypeface(Context context, TextView textview){
    if(this.typeface == null){
      this.typeface = Typeface.createFromAsset(context.getAssets(), "Helvetica_Neue.ttf");
    }
    textview.setTypeface(face); 
  }
  
}


public class FontTextView extends TextView {

    public FontTextView(Context context) {
      super(context);
      TextHelper.setTypeface(context, this);
    }
    
}

Line 9 : textview.setTypeface(typeface) is more exactly

so smth like this?
`
class TextHelper{

private  static Typeface  typeface = null;

public static void setTypeface(Context context, TextView textview){
    if(typeface == null){
        typeface = Typeface.createFromAsset(context.getAssets(), "Helvetica_Neue.ttf");
    }
    textview.setTypeface(typeface);
}

}

public class CustomTextView extends TextView {

public CustomTextView(Context context){
    super(context);
    TextHelper.setTypeface(context, this);

}
public CustomTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
    TextHelper.setTypeface(context, this);
}
public CustomTextView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    TextHelper.setTypeface(context, this);
}
protected void onDraw (Canvas canvas) {
    super.onDraw(canvas);


}

}
`

Nice , Thanks

Great !