Font asset not found helvetica.ttf on lollipop
If you are working on Android Studio make sure your asset folder is under main and not res This worked for me
Now it's better to use for custom fonts this approach
Store fonts in res/font
To get typeface use :
Typeface typeface = ResourcesCompat.getFont(context, R.font.myfont);
I had this problem too before I realized I didn't put "fonts/" before the .otf file
Typeface font = Typeface.createFromAsset(getAssets(),"fonts/TTMastersDEMOBlack.ttf");
This worked for me. In my case it didn't work because I created assets folder in res and not in main.
