adding an activity for searching time zones

app/src/main/AndroidManifest.xml

@@ -132,6 +132,18 @@
             </intent-filter>
         </activity>
 
+        <activity
+            android:name=".activities.SelectTimeZoneActivity"
+            android:parentActivityName=".activities.EventActivity">
+            <meta-data
+                android:name="android.app.default_searchable"
+                android:resource="@xml/searchable" />
+
+            <intent-filter>
+                <action android:name="android.intent.action.SEARCH" />
+            </intent-filter>
+        </activity>
+
         <activity
             android:name=".activities.SettingsActivity"
             android:label="@string/settings"

app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/SelectTimeZoneActivity.kt

@@ -0,0 +1,68 @@
+package com.simplemobiletools.calendar.pro.activities
+
+import android.app.SearchManager
+import android.content.Context
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import androidx.appcompat.widget.SearchView
+import androidx.core.view.MenuItemCompat
+import com.simplemobiletools.calendar.pro.R
+
+class SelectTimeZoneActivity : SimpleActivity() {
+    private var mIsSearchOpen = false
+    private var mSearchMenuItem: MenuItem? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_select_time_zone)
+        title = ""
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        menuInflater.inflate(R.menu.menu_select_time_zone, menu)
+        setupSearch(menu)
+        updateMenuItemColors(menu)
+        return true
+    }
+
+    private fun setupSearch(menu: Menu) {
+        val searchManager = getSystemService(Context.SEARCH_SERVICE) as SearchManager
+        mSearchMenuItem = menu.findItem(R.id.search)
+        (mSearchMenuItem!!.actionView as SearchView).apply {
+            queryHint = getString(R.string.enter_a_country)
+            setSearchableInfo(searchManager.getSearchableInfo(componentName))
+            isSubmitButtonEnabled = false
+            isIconified = false
+            setOnQueryTextListener(object : SearchView.OnQueryTextListener {
+                override fun onQueryTextSubmit(query: String) = false
+
+                override fun onQueryTextChange(newText: String): Boolean {
+                    if (mIsSearchOpen) {
+                        searchQueryChanged(newText)
+                    }
+                    return true
+                }
+            })
+        }
+
+        mSearchMenuItem!!.expandActionView()
+        MenuItemCompat.setOnActionExpandListener(mSearchMenuItem, object : MenuItemCompat.OnActionExpandListener {
+            override fun onMenuItemActionExpand(item: MenuItem?): Boolean {
+                mIsSearchOpen = true
+                searchQueryChanged("")
+                return true
+            }
+
+            override fun onMenuItemActionCollapse(item: MenuItem?): Boolean {
+                mIsSearchOpen = false
+                finish()
+                return true
+            }
+        })
+    }
+
+    private fun searchQueryChanged(text: String) {
+
+    }
+}

app/src/main/res/layout/activity_select_time_zone.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.simplemobiletools.commons.views.MyRecyclerView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/select_time_zone_list"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:clipToPadding="false"
+    app:layoutManager="com.simplemobiletools.commons.views.MyLinearLayoutManager" />

app/src/main/res/menu/menu_select_time_zone.xml

@@ -0,0 +1,10 @@
+<?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/search"
+        android:icon="@drawable/ic_search_vector"
+        android:title="@string/search"
+        app:actionViewClass="androidx.appcompat.widget.SearchView"
+        app:showAsAction="collapseActionView|ifRoom" />
+</menu>