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katherineallenkatherineallen
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added polygon demo activity and associated files
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‎ApiDemos/kotlin/app/src/main/AndroidManifest.xml

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</intent-filter>
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</activity>
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<activity android:name=".MarkerDemoActivity"/>
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<activity android:name=".PolygonDemoActivity"/>
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<activity android:name=".CameraDemoActivity"/>
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</application>
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‎ApiDemos/kotlin/app/src/main/java/com/example/kotlindemos/DemoDetailsList.kt

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class DemoDetailsList {
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companion object {
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val DEMOS = listOf<DemoDetails>(
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DemoDetails(R.string.polygon_demo_label, R.string.polygon_demo_details,
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PolygonDemoActivity::class.java),
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DemoDetails(R.string.camera_demo_label, R.string.camera_demo_description,
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CameraDemoActivity::class.java),
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DemoDetails(R.string.markers_demo_label, R.string.markers_demo_description,

‎ApiDemos/kotlin/app/src/main/java/com/example/kotlindemos/PolygonDemoActivity.kt

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/*
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* Copyright 2018 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.kotlindemos
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import android.graphics.Color
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import android.os.Bundle
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import android.support.v7.app.AppCompatActivity
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import android.view.View
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import android.widget.AdapterView
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import android.widget.SeekBar
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import android.widget.Spinner
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import android.widget.CheckBox
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import android.widget.ArrayAdapter
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import com.google.android.gms.maps.CameraUpdateFactory
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import com.google.android.gms.maps.model.Dash
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import com.google.android.gms.maps.model.Dot
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import com.google.android.gms.maps.model.Gap
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import com.google.android.gms.maps.GoogleMap
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import com.google.android.gms.maps.model.JointType
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import com.google.android.gms.maps.model.LatLng
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import com.google.android.gms.maps.OnMapReadyCallback
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import com.google.android.gms.maps.model.PatternItem
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import com.google.android.gms.maps.model.Polygon
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import com.google.android.gms.maps.model.PolygonOptions
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import com.google.android.gms.maps.SupportMapFragment
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import java.util.Arrays
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/**
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* This shows how to draw polygons on a map.
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*/
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class PolygonDemoActivity :
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AppCompatActivity(),
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OnMapReadyCallback,
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SeekBar.OnSeekBarChangeListener,
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AdapterView.OnItemSelectedListener {
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private val center = LatLng(-20.0, 130.0)
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private val MAX_WIDTH_PX = 100
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private val MAX_HUE_DEGREES = 360
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private val MAX_ALPHA = 255
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private val PATTERN_DASH_LENGTH_PX = 50
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private val PATTERN_GAP_LENGTH_PX = 10
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private val dot = Dot()
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private val dash = Dash(PATTERN_DASH_LENGTH_PX.toFloat())
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private val gap = Gap(PATTERN_GAP_LENGTH_PX.toFloat())
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private val patternDotted = Arrays.asList(dot, gap)
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private val patternDashed = Arrays.asList(dash, gap)
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private val patternMixed = Arrays.asList(dot, gap, dot, dash, gap)
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private lateinit var mutablePolygon: Polygon
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private lateinit var fillHueBar: SeekBar
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private lateinit var fillAlphaBar: SeekBar
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private lateinit var strokeWidthBar: SeekBar
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private lateinit var strokeHueBar: SeekBar
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private lateinit var strokeAlphaBar: SeekBar
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private lateinit var strokeJointTypeSpinner: Spinner
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private lateinit var strokePatternSpinner: Spinner
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private lateinit var clickabilityCheckbox: CheckBox
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// These are the options for polygon stroke joints and patterns. We use their
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// string resource IDs as identifiers.
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private val jointTypeNameResourceIds = intArrayOf(R.string.joint_type_default, // Default
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R.string.joint_type_bevel, R.string.joint_type_round)
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private val patternTypeNameResourceIds = intArrayOf(R.string.pattern_solid, // Default
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R.string.pattern_dashed, R.string.pattern_dotted, R.string.pattern_mixed)
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(R.layout.polygon_demo)
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fillHueBar = findViewById<SeekBar>(R.id.fillHueSeekBar).apply {
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max = MAX_HUE_DEGREES
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progress = MAX_HUE_DEGREES / 2
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}
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fillAlphaBar = findViewById<SeekBar>(R.id.fillAlphaSeekBar).apply {
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max = MAX_ALPHA
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progress = MAX_ALPHA / 2
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}
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strokeWidthBar = findViewById<SeekBar>(R.id.strokeWidthSeekBar).apply {
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max = MAX_WIDTH_PX
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progress = MAX_WIDTH_PX / 3
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}
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strokeHueBar = findViewById<SeekBar>(R.id.strokeHueSeekBar).apply {
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max = MAX_HUE_DEGREES
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progress = 0
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}
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strokeAlphaBar = findViewById<SeekBar>(R.id.strokeAlphaSeekBar).apply {
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max = MAX_ALPHA
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progress = MAX_ALPHA
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}
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strokeJointTypeSpinner = findViewById<Spinner>(R.id.strokeJointTypeSpinner).apply {
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adapter = ArrayAdapter(
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this@PolygonDemoActivity, android.R.layout.simple_spinner_item,
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getResourceStrings(jointTypeNameResourceIds))
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}
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strokePatternSpinner = findViewById<Spinner>(R.id.strokePatternSpinner).apply {
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adapter = ArrayAdapter(
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this@PolygonDemoActivity, android.R.layout.simple_spinner_item,
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getResourceStrings(patternTypeNameResourceIds))
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}
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clickabilityCheckbox = findViewById(R.id.toggleClickability)
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val mapFragment = supportFragmentManager.findFragmentById(R.id.map) as SupportMapFragment
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mapFragment.getMapAsync(this)
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}
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private fun getResourceStrings(resourceIds: IntArray): List<String> {
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return resourceIds.map { getString(it) }
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}
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override fun onMapReady(googleMap: GoogleMap?) {
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// return early if the map was not initialised properly
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googleMap ?: return
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val fillColorArgb = Color.HSVToColor(
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fillAlphaBar.progress, floatArrayOf(fillHueBar.progress.toFloat(), 1f, 1f))
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val strokeColorArgb = Color.HSVToColor(
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strokeAlphaBar.progress, floatArrayOf(strokeHueBar.progress.toFloat(), 1f, 1f))
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with(googleMap) {
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// Override the default content description on the view, for accessibility mode.
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setContentDescription(getString(R.string.polygon_demo_description))
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// Move the googleMap so that it is centered on the mutable polygon.
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moveCamera(CameraUpdateFactory.newLatLngZoom(center, 4f))
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// Create a rectangle with two rectangular holes.
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mutablePolygon = addPolygon(PolygonOptions().apply {
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addAll(createRectangle(center, 5.0, 5.0))
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addHole(createRectangle(LatLng(-22.0, 128.0), 1.0, 1.0))
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addHole(createRectangle(LatLng(-18.0, 133.0), 0.5, 1.5))
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fillColor(fillColorArgb)
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strokeColor(strokeColorArgb)
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strokeWidth(strokeWidthBar.progress.toFloat())
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clickable(clickabilityCheckbox.isChecked)
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})
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// Add a listener for polygon clicks that changes the clicked polygon's stroke color.
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setOnPolygonClickListener { polygon ->
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// Flip the red, green and blue components of the polygon's stroke color.
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polygon.strokeColor = polygon.strokeColor xor 0x00ffffff
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}
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}
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// set listeners on seekBars
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arrayOf(fillHueBar, fillAlphaBar, strokeWidthBar, strokeHueBar, strokeAlphaBar).map {
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it.setOnSeekBarChangeListener(this)
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}
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// set listeners on spinners
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arrayOf(strokeJointTypeSpinner, strokePatternSpinner).map {
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it.onItemSelectedListener = this
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}
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// set line pattern and joint type based on current spinner position
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with(mutablePolygon) {
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strokeJointType = getSelectedJointType(strokeJointTypeSpinner.selectedItemPosition)
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strokePattern = getSelectedPattern(strokePatternSpinner.selectedItemPosition)
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}
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}
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/**
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* Creates a List of LatLngs that form a rectangle with the given dimensions.
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*/
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private fun createRectangle(
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center: LatLng,
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halfWidth: Double,
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halfHeight: Double
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): List<LatLng> {
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return Arrays.asList(
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LatLng(center.latitude - halfHeight, center.longitude - halfWidth),
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LatLng(center.latitude - halfHeight, center.longitude + halfWidth),
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LatLng(center.latitude + halfHeight, center.longitude + halfWidth),
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LatLng(center.latitude + halfHeight, center.longitude - halfWidth),
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LatLng(center.latitude - halfHeight, center.longitude - halfWidth))
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}
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private fun getSelectedJointType(pos: Int): Int {
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return when (jointTypeNameResourceIds[pos]) {
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R.string.joint_type_bevel -> JointType.BEVEL
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R.string.joint_type_round -> JointType.ROUND
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R.string.joint_type_default -> JointType.DEFAULT
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else -> 0
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}
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}
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private fun getSelectedPattern(pos: Int): List<PatternItem>? {
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return when (patternTypeNameResourceIds[pos]) {
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R.string.pattern_solid -> null
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R.string.pattern_dotted -> patternDotted
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R.string.pattern_dashed -> patternDashed
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R.string.pattern_mixed -> patternMixed
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else -> null
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}
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}
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/**
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* Toggles the clickability of the polygon based on the state of the View that triggered this
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* call.
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* This callback is defined on the CheckBox in the layout for this Activity.
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*/
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fun toggleClickability(view: View) {
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if (view is CheckBox) {
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mutablePolygon.isClickable = view.isChecked
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}
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}
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/**
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* Listener that is called when a seek bar is moved.
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* Can change polygon fill color/transparency, stroke color/transparency and stroke width.
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*/
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override fun onProgressChanged(seekBar: SeekBar?, progress: Int,
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fromUser: Boolean) {
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mutablePolygon.fillColor = when (seekBar) {
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fillHueBar -> Color.HSVToColor(Color.alpha(mutablePolygon.fillColor),
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floatArrayOf(progress.toFloat(), 1f, 1f))
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fillAlphaBar -> {
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val prevColor = mutablePolygon.fillColor
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Color.argb(progress, Color.red(prevColor), Color.green(prevColor),
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Color.blue(prevColor))
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}
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else -> mutablePolygon.fillColor
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}
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mutablePolygon.strokeColor = when (seekBar) {
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strokeHueBar -> Color.HSVToColor(
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Color.alpha(mutablePolygon.strokeColor),
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floatArrayOf(progress.toFloat(), 1f, 1f))
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strokeAlphaBar -> {
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val prevColorArgb = mutablePolygon.strokeColor
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Color.argb(progress, Color.red(prevColorArgb),
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Color.green(prevColorArgb), Color.blue(prevColorArgb))
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}
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else -> mutablePolygon.strokeColor
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}
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if (seekBar == strokeWidthBar) mutablePolygon.strokeWidth = progress.toFloat()
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}
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override fun onStartTrackingTouch(seekBar: SeekBar?) {
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// do nothing
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}
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override fun onStopTrackingTouch(seekBar: SeekBar?) {
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// do nothing
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}
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/**
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* Listener for when an item is selected using a spinner.
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* Can change line pattern and joint type.
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*/
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override fun onItemSelected(parent: AdapterView<*>?, view: View?, pos: Int,
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id: Long) {
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when (parent?.id) {
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R.id.strokeJointTypeSpinner ->
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mutablePolygon.strokeJointType = getSelectedJointType(pos)
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R.id.strokePatternSpinner ->
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mutablePolygon.strokePattern = getSelectedPattern(pos)
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}
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}
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override fun onNothingSelected(parent: AdapterView<*>?) {
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// don't do anything here
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}
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}

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