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LiteDemoActivity.kt
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LiteDemoActivity.kt
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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.example.kotlindemos
import android.graphics.Color
import android.os.Bundle
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import com.example.kotlindemos.OnMapAndViewReadyListener.OnGlobalLayoutAndMapReadyListener
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.*
/**
* This demo shows some features supported in lite mode.
* In particular it demonstrates the use of [com.google.android.gms.maps.model.Marker]s to
* launch the Google Maps Mobile application, [com.google.android.gms.maps.CameraUpdate]s
* and [com.google.android.gms.maps.model.Polygon]s.
*/
class LiteDemoActivity : AppCompatActivity(), OnGlobalLayoutAndMapReadyListener {
private lateinit var map: GoogleMap
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
// Set the layout
setContentView(R.layout.lite_demo)
// Get the map and register for the ready callback
val mapFragment = supportFragmentManager.findFragmentById(R.id.map) as SupportMapFragment
OnMapAndViewReadyListener(mapFragment, this)
}
/**
* Move the camera to center on Darwin.
*/
fun showDarwin(v: View?) {
if (!::map.isInitialized) return
// Center camera on Adelaide marker
map.moveCamera(CameraUpdateFactory.newLatLngZoom(DARWIN, 10f))
}
/**
* Move the camera to center on Adelaide.
*/
fun showAdelaide(v: View?) {
if (!::map.isInitialized) return
// Center camera on Adelaide marker
map.moveCamera(CameraUpdateFactory.newLatLngZoom(ADELAIDE, 10f))
}
/**
* Move the camera to show all of Australia.
* Construct a [com.google.android.gms.maps.model.LatLngBounds] from markers positions,
* then move the camera.
*/
fun showAustralia(v: View?) {
if (!::map.isInitialized) return
// Create bounds that include all locations of the map
val boundsBuilder = LatLngBounds.builder()
.include(PERTH)
.include(ADELAIDE)
.include(MELBOURNE)
.include(SYDNEY)
.include(DARWIN)
.include(BRISBANE)
// Move camera to show all markers and locations
map.moveCamera(CameraUpdateFactory.newLatLngBounds(boundsBuilder.build(), 20))
}
/**
* Called when the map is ready to add all markers and objects to the map.
*/
override fun onMapReady(googleMap: GoogleMap?) {
// return early if the map was not initialised properly
map = googleMap ?: return
addMarkers()
addPolyObjects()
showAustralia(null)
}
/**
* Add a Polyline and a Polygon to the map.
* The Polyline connects Melbourne, Adelaide and Perth. The Polygon is located in the Northern
* Territory (Australia).
*/
private fun addPolyObjects() {
map.addPolyline(
PolylineOptions()
.add(
MELBOURNE,
ADELAIDE,
PERTH
)
.color(Color.GREEN)
.width(5f)
)
map.addPolygon(
PolygonOptions()
.add(*POLYGON)
.fillColor(Color.CYAN)
.strokeColor(Color.BLUE)
.strokeWidth(5f)
)
}
/**
* Add Markers with default info windows to the map.
*/
private fun addMarkers() {
map.addMarker(
MarkerOptions()
.position(BRISBANE)
.title("Brisbane")
)
map.addMarker(
MarkerOptions()
.position(MELBOURNE)
.title("Melbourne")
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))
)
map.addMarker(
MarkerOptions()
.position(SYDNEY)
.title("Sydney")
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED))
)
map.addMarker(
MarkerOptions()
.position(ADELAIDE)
.title("Adelaide")
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW))
)
map.addMarker(
MarkerOptions()
.position(PERTH)
.title("Perth")
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA))
)
}
companion object {
private val BRISBANE = LatLng(-27.47093, 153.0235)
private val MELBOURNE = LatLng(-37.81319, 144.96298)
private val SYDNEY = LatLng(-33.87365, 151.20689)
private val ADELAIDE = LatLng(-34.92873, 138.59995)
private val PERTH = LatLng(-31.952854, 115.857342)
private val DARWIN = LatLng(-12.459501, 130.839915)
/**
* A Polygon with five points in the Norther Territory, Australia.
*/
private val POLYGON = arrayOf(
LatLng(-18.000328, 130.473633), LatLng(-16.173880, 135.087891),
LatLng(-19.663970, 137.724609), LatLng(-23.202307, 135.395508),
LatLng(-19.705347, 129.550781)
)
}
}