print service

menu
=============
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto">
    <item android:id="@+id/action_print"
          android:orderInCategory="100"
          app:showAsAction="never"
          android:title="فاتورة طباعة"
          />
</menu>

layout
===========
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
>
    <WebView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/webView"/>

</LinearLayout>

java
============
package com.example.nadininvoice

import android.content.Context
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.print.PrintAttributes
import android.print.PrintManager
import android.util.Log
import android.view.Menu
import android.view.MenuItem
import android.webkit.WebResourceRequest
import android.webkit.WebView
import android.webkit.WebViewClient
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {
    //declare of web object
    private var myWebView: WebView?=null
    //simple html page for testing
    val htmlDocument = "<html><body><h1>Nadin Wedding bus cost</h1><hr>" +
            "<p>Bus for friends from hacker U - 3000Nis</p>" +
            "<p>Bus for groom familiy (Hassan) - 7500nis</p>" +
            "<p>Bus for groom friends (Hassan) - 7500nis</p>" +
            "<hr><b>total cost : 18000Nis</b>" +
            "</body></html>"

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        printWebView()
        Toast.makeText(this,"loading site...",Toast.LENGTH_LONG).show()
    }

    private fun printWebView()
    {
        val webView = WebView(applicationContext)
        webView.webViewClient = object : WebViewClient(){
            override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest?): Boolean {
                return false
            }

            override fun onPageFinished(view: WebView?, url: String?) {
                createWebPrintJob(view)
                myWebView=null
            }
        }

        //load the html data into the webView
        //webView.loadDataWithBaseURL(null,htmlDocument,"text/HTML","UTF-8",null)
        //load the html data into the webView by a url
        webView.loadUrl(("https://www.hackeru.co.il/course/applications"))
        myWebView=webView
    }

    private fun createWebPrintJob(view: WebView?){
        //getting the print service
        val printManger = getSystemService(Context.PRINT_SERVICE) as PrintManager
        //get the print adapter
        val printAdapter = view!!.createPrintDocumentAdapter("myDoucment")
        // create a job name
        val jobName = getString(R.string.app_name)+ " print test"
        //all is ready, you can print the document, create a print command
        printManger.print(jobName,printAdapter,PrintAttributes.Builder().build())
    }

    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
        /*
            if (item.itemId == R.id.action_print)
            {
                createWebPrintJob(myWebView)
            }
        */
        when (item!!.itemId){
            R.menu.menu->{
                createWebPrintJob(myWebView)
            }
            else->{

            }
        }
        return super.onOptionsItemSelected(item)
    }

    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
        menuInflater.inflate(R.menu.menu,menu)
        return true
    }
}