请尝试以下代码,获取如何在 Kotlin 中添加标记聚类器的指导和演示。
class MyItem : ClusterItem {
private val mPosition: LatLng
private val mTitle: String
private val mSnippet: String
constructor(lat: Double, lng: Double) {
mPosition = LatLng(lat, lng)
mTitle = ""
mSnippet = ""
}
constructor(lat: Double, lng: Double, title: String, snippet: String) {
mPosition = LatLng(lat, lng)
mTitle = title
mSnippet = snippet
}
override fun getPosition(): LatLng {
return mPosition
}
override fun getTitle(): String {
return mTitle
}
override fun getSnippet(): String {
return mSnippet
}
}
class MapsActivity : AppCompatActivity(), OnMapReadyCallback, GoogleMap.OnInfoWindowClickListener {
private lateinit var mMap: GoogleMap
private lateinit var mClusterManager: ClusterManager<MyItem>
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_maps)
val mapFragment = supportFragmentManager
.findFragmentById(R.id.map) as SupportMapFragment
mapFragment.getMapAsync(this)
}
override fun onMapReady(googleMap: GoogleMap) {
mMap = googleMap
setUpClusterer()
mMap.setOnInfoWindowClickListener(this);
}
private fun setUpClusterer() {
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(LatLng(51.503186, -0.126446), 10f))
mClusterManager = ClusterManager(this, mMap)
mMap.setOnCameraIdleListener(mClusterManager)
mMap.setOnMarkerClickListener(mClusterManager)
addItems()
}
private fun addItems() {
var lat = 51.5145160
var lng = -0.1270060
for (i in 0..9) {
val offset = i / 60.0
lat = lat + offset
lng = lng + offset
val title = "This is the title"
val snippet = "and this is the snippet."
val offsetItem = MyItem(lat, lng, title, snippet)
mClusterManager.addItem(offsetItem)
}
}
override fun onInfoWindowClick(marker: Marker) {
Toast.makeText(
this, "Info window clicked",
Toast.LENGTH_SHORT
).show()
}
}
请注意,这是基于 Google 指南 [1] [2] 中的 Java 代码实现,它对我来说没有问题,所以我希望这对您有帮助!
[1] https://developers.google.com/maps/documentation/android-sdk/utility/marker-clustering https://developers.google.com/maps/documentation/android-sdk/utility/marker-clustering
[2] https://developers.google.com/maps/documentation/android-sdk/infowindows https://developers.google.com/maps/documentation/android-sdk/infowindows