Keyboard hideKeyboardAccessoryBar not working

Hi i’m trying to display done, cancel or next button on keyboard but they are not showing. i’m using ionic 2 keyboard plugin, and i has import this plugin inside app.component.ts and app.module.ts file and i has write the following line after platform ready “keyboard.hideKeyboardAccessoryBar(false);” but on keboard no any done, cancel or next button not showing. please help me.