added graphical account configuration and many other improvements

app/src/main/kotlin/com/tutpro/baresip/UaSpinnerAdapter.kt

@@ -0,0 +1,37 @@
+package com.tutpro.baresip
+
+import android.content.Context
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ArrayAdapter
+import android.widget.ImageView
+import android.widget.TextView
+
+import java.util.ArrayList
+
+class UaSpinnerAdapter(private val cxt: Context, private val uas: ArrayList<UserAgent>,
+                            private val images: ArrayList<Int>) :
+        ArrayAdapter<Int>(cxt, android.R.layout.simple_spinner_item, images) {
+
+    override fun getDropDownView(position: Int, convertView: View?, parent: ViewGroup): View {
+        return getImageForPosition(position, parent)
+    }
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        return getImageForPosition(position, parent)
+    }
+
+    private fun getImageForPosition(position: Int, parent: ViewGroup): View {
+        val inflater = cxt.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
+        val row = inflater.inflate(R.layout.account_spinner, parent, false)
+        val textView = row.findViewById(R.id.spinnerText) as TextView
+        textView.text = uas[position].aor.replace("sip:", "")
+        textView.textSize = 17f
+        val imageView = row.findViewById(R.id.spinnerImage) as ImageView
+        imageView.setImageResource(images[position])
+        return row
+    }
+
+}