Print from android app

[ikrami sami hall]

I am newer to android and java.

i have application written in c# and running inside Android using Webview

now i need to print PDF to Thermal printer Epson M30, when i download PDF file from the application i need to print it using this printer.

i downloaded ePOS_SDK_Android_v2.14.0

and i have added the below:

Store ePOS2.jar and ePOSEasySelect.jar in the following location. C:\Users[account name]\AndroidStudioProjects[project name]\app\libs

Create the following folder structure. C:\Users[account name]\AndroidStudioProjects[project name]\app\src\main\jniLibs

Depending on your CPU, store the following folders bundled with this package in the jniLibs folder: armeabi arm64-v8a x86_64

Permission added:

<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission
android:name="android.permission.ACCESS_COARSE_LOCATION"/>

<uses-permission android:name="android.permission.INTERNET"/>
Now there is code to be add :

printer = new Printer(Printer.TM_M30, Printer.MODEL_ANK, this)
1- first i don't know where to add, because i need printer to be add to android mobile once webview started to give user ability to select this printer while they select the pdf to print

how to do it?