//得到TextView控件对象

        TextView textView = (TextView)findViewById(R.id.custom);

        //将字体文件保存在assets/fonts/文件夹下，创建Typeface对象

        Typeface typeFace = Typeface.createFromAsset(getAssets(), "fonts/HandmadeTypewriter.ttf");

        //应用字体

        textView.setTypeface(typeFace);