Added custom action bar with USB icon.

app/src/main/java/com/example/hpos/presentation/testRight/TestRightActivity.kt

@@ -1,6 +1,5 @@
 package com.example.hpos.presentation.testRight
 
-import android.R
 import android.app.PendingIntent
 import android.content.*
 import android.hardware.usb.UsbDevice
@@ -9,16 +8,18 @@ import android.hardware.usb.UsbManager
 import android.os.Bundle
 import android.os.IBinder
 import android.util.Log
+import android.view.Menu
 import android.view.MenuItem
-import android.view.View
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.ContextCompat
+import androidx.core.view.get
 import androidx.lifecycle.ViewModelProvider
+import com.example.hpos.R
 import com.example.hpos.data.DataHolder
 import com.example.hpos.data.constant.Constants
 import com.example.hpos.databinding.ActivityTestRightBinding
 import com.example.hpos.util.MyViewModelFactory
-import com.google.android.material.snackbar.Snackbar
 import com.hoho.android.usbserial.driver.UsbSerialDriver
 import com.hoho.android.usbserial.driver.UsbSerialProber
 
@@ -26,6 +27,7 @@ class TestRightActivity : AppCompatActivity() {
 
     private lateinit var binding: ActivityTestRightBinding
     private lateinit var viewModel: TestRightViewModel
+    private var myMenu: Menu? = null
 
     private lateinit var mDriver: UsbSerialDriver
     private var mConnection: UsbDeviceConnection? = null
@@ -74,13 +76,32 @@ class TestRightActivity : AppCompatActivity() {
             MyViewModelFactory(this.applicationContext)
         )[TestRightViewModel::class.java]
 
+        setSupportActionBar(binding.myToolbar)
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+
         // Connected or not connected icon with livetime status using live data
 
-        connectUsb(false)
-//        testing()
+            // Todo: uncomment it
+//        connectUsb(false)
 
     }
 
+    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+        menuInflater.inflate(R.menu.my_menu, menu)
+        myMenu = menu
+//        menu?.get(0)?.icon = ContextCompat.getDrawable(this, R.drawable.ic_baseline_circle_24)
+        return true
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem) = when (item.itemId) {
+        R.id.action_usb -> {
+            Toast.makeText(this, "USB Connected", Toast.LENGTH_SHORT).show()
+            myMenu?.get(0)?.icon = ContextCompat.getDrawable(this, R.drawable.ic_baseline_usb_off_24)
+            true
+        }
+        else -> {super.onOptionsItemSelected(item)}
+    }
+
 //    private fun testing() {
 //        supportFragmentManager.beginTransaction()
 //            .replace(binding.flMain.id, TestRightExpSample()).commit()
@@ -168,6 +189,14 @@ class TestRightActivity : AppCompatActivity() {
 
     fun onUsbError(msg: String) {
         Toast.makeText(this, msg, Toast.LENGTH_SHORT).show()
+//        Snackbar.make(binding.flMain, msg, Snackbar.LENGTH_LONG)
+//            .setAction("CLOSE", object : View.OnClickListener {
+//                override fun onClick(p0: View?) {
+//                    TODO("Not yet implemented")
+//                }
+//            })
+//            .setActionTextColor(resources.getColor(R.color.holo_red_light))
+//            .show()
         if (!isFinishing)
             onBackPressed()
     }