使用 Kotlin 在 Android Studio 中搜索附近的地点
Search Nearby Places in Android Studio using Kotlin
我想搜索用户当前位置一定半径范围内的附近地点（例如：医院、学校、综合诊所等）。
我已经成功地获得了用户的当前位置，但不知道如何在半径范围内寻找附近的地方。
我已经设法设置 html-attributions 来获取附近的地点，如下所示：
https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=${location.latitude},${location.longitude}&radius=1500&type=restaurant&key=YOUR_API_KEY （我已经把我的钥匙）
但我似乎不知道在哪里以及如何实现这个 Url。除非有人能告诉我如何使用这个 URL。这也可能有很大帮助！
谢谢！
这是我目前的代码：
package com.sampathpatro.vipalsiddh
import android.content.pm.PackageManager
import android.location.Address
import android.location.Geocoder
import android.location.Location
import android.os.Bundle
import android.util.Log
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import com.google.android.gms.location.FusedLocationProviderClient
import com.google.android.gms.location.LocationServices
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.OnMapReadyCallback
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.LatLng
import com.google.android.gms.maps.model.Marker
import com.google.android.gms.maps.model.MarkerOptions
import java.io.IOException
class MapsActivity : AppCompatActivity(), OnMapReadyCallback, GoogleMap.OnMarkerClickListener {
private lateinit var map: GoogleMap
private lateinit var fusedLocationProviderClient: FusedLocationProviderClient
private lateinit var lastLocation: Location
private fun placeMarkerOnMap(location: LatLng){
val markerOptions = MarkerOptions().position(location)
val titleString = getAddress(location)
markerOptions.title(titleString)
map.addMarker(markerOptions)
}
private fun getAddress(latLng: LatLng): String {
val geocoder = Geocoder (this)
val addresses: List<Address>
val address: Address?
var addressText = ""
try {
addresses = geocoder.getFromLocation(latLng.latitude, latLng.longitude, 1)
if (null != addresses && addresses.isNotEmpty()){
address = addresses[0]
for (i in 0 until address.maxAddressLineIndex){
addressText += if (i==0) address.getAddressLine(i) else
"\n" + address.getAddressLine(i)
}
}
} catch (e: IOException){
Log.e("MapsActivity", e.localizedMessage)
}
return addressText
}
companion object {
private const val LOCATION_PERMISSION_REQUEST_CODE = 1
}
private fun setUpMap() {
if(ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) !=
PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION),
LOCATION_PERMISSION_REQUEST_CODE)
return
}
map.isMyLocationEnabled = true
fusedLocationProviderClient.lastLocation.addOnSuccessListener(this) { location ->
if (location != null){
lastLocation = location
val currentLatLng = LatLng(location.latitude, location.longitude)
placeMarkerOnMap(currentLatLng)
map.animateCamera(CameraUpdateFactory.newLatLngZoom(currentLatLng, 12f))
}
}
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_maps)
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
val mapFragment = supportFragmentManager
.findFragmentById(R.id.map) as SupportMapFragment
mapFragment.getMapAsync(this)
fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this)
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
override fun onMapReady(googleMap: GoogleMap) {
map = googleMap
map.uiSettings.isZoomControlsEnabled = true
map.setOnMarkerClickListener(this)
setUpMap()
}
override fun onMarkerClick(p0: Marker?) = false
} ```
使用 OkHttp 库安全地进行 API 调用。
将库包含在您的 gradle 文件中
将 GSON 库与它一起使用，它将使您轻松完成此操作，为简单起见，我将通过 JSONObject
使其正常工作
在模块级别 gradle，包括这个
implementation("com.squareup.okhttp3:okhttp:4.8.1")
使用此方法拨打电话
fun makeApiCall(location:Location){
val request = Request.Builder().url("https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=${location.latitude},${location.longitude}&radius=1500&type=restaurant&key=YOUR_API_KEY")
.build()
val response = OkHttpClient().newCall(request).execute().body().string()
val jsonObject = JSONObject(response) // This will make the json below as an object for you
// You can access all the attributes , nested ones using JSONArray and JSONObject here
}
当您拨打 api 电话时，您会收到类似这样的回复
{
"debug_log" : {
"line" : []
},
"html_attributions" : [],
"logging_info" : {
"experiment_id" : [],
"query_geographic_location" : "AU"
},
"results" : [
{
"geometry" : {
"location" : {
"lat" : -33.86879,
"lng" : 151.194217
}
},
"icon" : "http://maps.gstatic.com/mapfiles/place_api/icons/restaurant-71.png",
"id" : "21a0b251c9b8392186142c798263e289fe45b4aa",
"name" : "Rhythmboat Cruises",
"opening_hours" : {
"open_now" : false,
"weekday_text" : []
},
"photos" : [
{
"height" : 426,
"html_attributions" : [
"\u003ca href=\"https://www.google.com/maps/views/profile/104066891898402903288\"\u003eRhythmboat Cruises\u003c/a\u003e"
],
"photo_reference" : "CmRdAAAA-YL_I_Gk02blOX6S0nKHry8PFu9pDyp3Y9AnqISsa3Eq8mkbdD5mXuu1Fax60s0nSy3iiX-h5j-ztyLHcc1-782MsLQsgLLa4t3ZgDmCMll-a8ABapZGnZwDKByk67LFEhBgedv_u_eYFsEo9ay8jxJjGhTUHKPJ4G82vBJqSNliuv7UlAtclw",
"width" : 640
}
],
"place_id" : "ChIJyWEHuEmuEmsRm9hTkapTCrk",
"reference" : "CnRmAAAAvQlMKw-XtxEY4vWFCvudF7CEMQGI5ycNbfVgGl9rAF75fdiPOiLJw1k9NL2v8ZIJsOJuRS3Lm9Dw1vga4ajycAs7PlxN1MVnnYT9la0pBvEvSQNlyvszKANS1R4P7Mvk_jhqswMggqCUtwJ13LN2hRIQOiAkLTWUi3DOjVVOw7J5IRoUb_cJyJaJNqKdmkDM2f0OjQjh9F0",
"scope" : "GOOGLE",
"types" : [ "restaurant", "food", "point_of_interest", "establishment" ],
"vicinity" : "Pyrmont Bay Wharf (Near Australia Maritime Museum), Pyrmont, NSW 2009"
},
{
"geometry" : {
"location" : {
"lat" : -33.867591,
"lng" : 151.201196
}
},
"icon" : "http://maps.gstatic.com/mapfiles/place_api/icons/restaurant-71.png",
"id" : "a97f9fb468bcd26b68a23072a55af82d4b325e0d",
"name" : "Australian Cruise Group",
"opening_hours" : {
"open_now" : false,
"weekday_text" : []
},
"photos" : [
{
"height" : 1331,
"html_attributions" : [
"\u003ca href=\"https://www.google.com/maps/views/profile/110751364053842618118\"\u003eAustralian Cruise Group\u003c/a\u003e"
],
"photo_reference" : "CmRdAAAAtEoj29FJcNBccrsu6bHt0xgwVGhYlciCY1fe6gTr_d5_KkeP3LITnOwnpNRJWnX39B04-aIBOKXKJH6ltx948T5vWIYBoah1yZDXsWngWZ5kMsK7xyCB5P_q_xBIBxxUEhAYWeB4PiOm_Jy093fB-j0iGhSYmIs9xB2aa6u-RH8V8lZEk-Q5ig",
"width" : 2000
}
],
"place_id" : "ChIJrTLr-GyuEmsRBfy61i59si0",
"reference" : "CnRqAAAAFbukrZvRNsc05TreHUCrPEya5NcN9v0fFLLaK-D1fSyxFTuQlUDhDstU3qwXKw_fADX4W6guUkexax1nufgiYIuGCKoZPEnup1r-LhGGNz9dn1uf9Of5iOtZ1XgCeDjJaYvGbSB3C0pAXL8r9kOsmhIQbx2Sia2DAWTjtSZwuh5aehoUhM6upqBCDLhGruZAGGsCOwAiIq8",
"scope" : "GOOGLE",
"types" : [
"restaurant",
"travel_agency",
"food",
"point_of_interest",
"establishment"
],
"vicinity" : "32 The Promenade, King Street Wharf 5, Sydney"
},
{
"geometry" : {
"location" : {
"lat" : -33.870943,
"lng" : 151.190311
}
},
"icon" : "http://maps.gstatic.com/mapfiles/place_api/icons/bar-71.png",
"id" : "e644f7f34cf875b9919c6548f1b721947362850a",
"name" : "Lunch Cruise with Jazz on Sydney Harbour",
"opening_hours" : {
"open_now" : false,
"weekday_text" : []
},
"photos" : [
{
"height" : 292,
"html_attributions" : [
"\u003ca href=\"https://www.google.com/maps/views/profile/105423912060796272053\"\u003eFrom a Google User\u003c/a\u003e"
],
"photo_reference" : "CmRdAAAAR4bqFTKYWdBwZwdBdON_JRD7V_joTwwIPwRUpZIZWkSSd8GQ3P2O-_aQbUJdL2RhoAyzCUIF0f--DI4oXFneTpj5zZfFq-iFiT7i_x0tjnDveIY8tJv-6o0uWSSjYqabEhCKqQWZqrKAoddjDcc64N48GhQZ2T1_ntPzNKCooHpZzlYQ7AxFOA",
"width" : 438
}
],
"place_id" : "ChIJLfySpTOuEmsRPCRKrzl8ZEY",
"reference" : "CoQBewAAAFd2fO_YWGTiT4RzXWb5tsOuOt7YyV_ScQOwm0tqJSrAyACCczeOzV-P_mgZLro1oKP_34Nt0nVC_1OEKAQUcd7cUm7xmAMSX-EkbSWiD0kOWGgGgKuDRtb0t_8qsxBGU_izugWCyK7SRWezTxELYNdkS0OEiSWPnvhxvXuQktBBEhAAtEe7fagW2kUR14T1QpVsGhQBO7YpIyYSPvo4zUJuL_bX30nJZw",
"scope" : "GOOGLE",
"types" : [ "bar", "restaurant", "food", "point_of_interest", "establishment" ],
"vicinity" : "37 Bank St, Pyrmont"
}
],
"status" : "OK"
}
我想搜索用户当前位置一定半径范围内的附近地点（例如：医院、学校、综合诊所等）。 我已经成功地获得了用户的当前位置，但不知道如何在半径范围内寻找附近的地方。 我已经设法设置 html-attributions 来获取附近的地点，如下所示： https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=${location.latitude},${location.longitude}&radius=1500&type=restaurant&key=YOUR_API_KEY （我已经把我的钥匙）
但我似乎不知道在哪里以及如何实现这个 Url。除非有人能告诉我如何使用这个 URL。这也可能有很大帮助！ 谢谢！
这是我目前的代码：
package com.sampathpatro.vipalsiddh
import android.content.pm.PackageManager
import android.location.Address
import android.location.Geocoder
import android.location.Location
import android.os.Bundle
import android.util.Log
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import com.google.android.gms.location.FusedLocationProviderClient
import com.google.android.gms.location.LocationServices
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.OnMapReadyCallback
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.LatLng
import com.google.android.gms.maps.model.Marker
import com.google.android.gms.maps.model.MarkerOptions
import java.io.IOException
class MapsActivity : AppCompatActivity(), OnMapReadyCallback, GoogleMap.OnMarkerClickListener {
private lateinit var map: GoogleMap
private lateinit var fusedLocationProviderClient: FusedLocationProviderClient
private lateinit var lastLocation: Location
private fun placeMarkerOnMap(location: LatLng){
val markerOptions = MarkerOptions().position(location)
val titleString = getAddress(location)
markerOptions.title(titleString)
map.addMarker(markerOptions)
}
private fun getAddress(latLng: LatLng): String {
val geocoder = Geocoder (this)
val addresses: List<Address>
val address: Address?
var addressText = ""
try {
addresses = geocoder.getFromLocation(latLng.latitude, latLng.longitude, 1)
if (null != addresses && addresses.isNotEmpty()){
address = addresses[0]
for (i in 0 until address.maxAddressLineIndex){
addressText += if (i==0) address.getAddressLine(i) else
"\n" + address.getAddressLine(i)
}
}
} catch (e: IOException){
Log.e("MapsActivity", e.localizedMessage)
}
return addressText
}
companion object {
private const val LOCATION_PERMISSION_REQUEST_CODE = 1
}
private fun setUpMap() {
if(ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) !=
PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION),
LOCATION_PERMISSION_REQUEST_CODE)
return
}
map.isMyLocationEnabled = true
fusedLocationProviderClient.lastLocation.addOnSuccessListener(this) { location ->
if (location != null){
lastLocation = location
val currentLatLng = LatLng(location.latitude, location.longitude)
placeMarkerOnMap(currentLatLng)
map.animateCamera(CameraUpdateFactory.newLatLngZoom(currentLatLng, 12f))
}
}
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_maps)
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
val mapFragment = supportFragmentManager
.findFragmentById(R.id.map) as SupportMapFragment
mapFragment.getMapAsync(this)
fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this)
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
override fun onMapReady(googleMap: GoogleMap) {
map = googleMap
map.uiSettings.isZoomControlsEnabled = true
map.setOnMarkerClickListener(this)
setUpMap()
}
override fun onMarkerClick(p0: Marker?) = false
} ```
使用 OkHttp 库安全地进行 API 调用。 将库包含在您的 gradle 文件中
将 GSON 库与它一起使用，它将使您轻松完成此操作，为简单起见，我将通过 JSONObject
在模块级别 gradle，包括这个
implementation("com.squareup.okhttp3:okhttp:4.8.1")
使用此方法拨打电话
fun makeApiCall(location:Location){
val request = Request.Builder().url("https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=${location.latitude},${location.longitude}&radius=1500&type=restaurant&key=YOUR_API_KEY")
.build()
val response = OkHttpClient().newCall(request).execute().body().string()
val jsonObject = JSONObject(response) // This will make the json below as an object for you
// You can access all the attributes , nested ones using JSONArray and JSONObject here
}
当您拨打 api 电话时，您会收到类似这样的回复
{
"debug_log" : {
"line" : []
},
"html_attributions" : [],
"logging_info" : {
"experiment_id" : [],
"query_geographic_location" : "AU"
},
"results" : [
{
"geometry" : {
"location" : {
"lat" : -33.86879,
"lng" : 151.194217
}
},
"icon" : "http://maps.gstatic.com/mapfiles/place_api/icons/restaurant-71.png",
"id" : "21a0b251c9b8392186142c798263e289fe45b4aa",
"name" : "Rhythmboat Cruises",
"opening_hours" : {
"open_now" : false,
"weekday_text" : []
},
"photos" : [
{
"height" : 426,
"html_attributions" : [
"\u003ca href=\"https://www.google.com/maps/views/profile/104066891898402903288\"\u003eRhythmboat Cruises\u003c/a\u003e"
],
"photo_reference" : "CmRdAAAA-YL_I_Gk02blOX6S0nKHry8PFu9pDyp3Y9AnqISsa3Eq8mkbdD5mXuu1Fax60s0nSy3iiX-h5j-ztyLHcc1-782MsLQsgLLa4t3ZgDmCMll-a8ABapZGnZwDKByk67LFEhBgedv_u_eYFsEo9ay8jxJjGhTUHKPJ4G82vBJqSNliuv7UlAtclw",
"width" : 640
}
],
"place_id" : "ChIJyWEHuEmuEmsRm9hTkapTCrk",
"reference" : "CnRmAAAAvQlMKw-XtxEY4vWFCvudF7CEMQGI5ycNbfVgGl9rAF75fdiPOiLJw1k9NL2v8ZIJsOJuRS3Lm9Dw1vga4ajycAs7PlxN1MVnnYT9la0pBvEvSQNlyvszKANS1R4P7Mvk_jhqswMggqCUtwJ13LN2hRIQOiAkLTWUi3DOjVVOw7J5IRoUb_cJyJaJNqKdmkDM2f0OjQjh9F0",
"scope" : "GOOGLE",
"types" : [ "restaurant", "food", "point_of_interest", "establishment" ],
"vicinity" : "Pyrmont Bay Wharf (Near Australia Maritime Museum), Pyrmont, NSW 2009"
},
{
"geometry" : {
"location" : {
"lat" : -33.867591,
"lng" : 151.201196
}
},
"icon" : "http://maps.gstatic.com/mapfiles/place_api/icons/restaurant-71.png",
"id" : "a97f9fb468bcd26b68a23072a55af82d4b325e0d",
"name" : "Australian Cruise Group",
"opening_hours" : {
"open_now" : false,
"weekday_text" : []
},
"photos" : [
{
"height" : 1331,
"html_attributions" : [
"\u003ca href=\"https://www.google.com/maps/views/profile/110751364053842618118\"\u003eAustralian Cruise Group\u003c/a\u003e"
],
"photo_reference" : "CmRdAAAAtEoj29FJcNBccrsu6bHt0xgwVGhYlciCY1fe6gTr_d5_KkeP3LITnOwnpNRJWnX39B04-aIBOKXKJH6ltx948T5vWIYBoah1yZDXsWngWZ5kMsK7xyCB5P_q_xBIBxxUEhAYWeB4PiOm_Jy093fB-j0iGhSYmIs9xB2aa6u-RH8V8lZEk-Q5ig",
"width" : 2000
}
],
"place_id" : "ChIJrTLr-GyuEmsRBfy61i59si0",
"reference" : "CnRqAAAAFbukrZvRNsc05TreHUCrPEya5NcN9v0fFLLaK-D1fSyxFTuQlUDhDstU3qwXKw_fADX4W6guUkexax1nufgiYIuGCKoZPEnup1r-LhGGNz9dn1uf9Of5iOtZ1XgCeDjJaYvGbSB3C0pAXL8r9kOsmhIQbx2Sia2DAWTjtSZwuh5aehoUhM6upqBCDLhGruZAGGsCOwAiIq8",
"scope" : "GOOGLE",
"types" : [
"restaurant",
"travel_agency",
"food",
"point_of_interest",
"establishment"
],
"vicinity" : "32 The Promenade, King Street Wharf 5, Sydney"
},
{
"geometry" : {
"location" : {
"lat" : -33.870943,
"lng" : 151.190311
}
},
"icon" : "http://maps.gstatic.com/mapfiles/place_api/icons/bar-71.png",
"id" : "e644f7f34cf875b9919c6548f1b721947362850a",
"name" : "Lunch Cruise with Jazz on Sydney Harbour",
"opening_hours" : {
"open_now" : false,
"weekday_text" : []
},
"photos" : [
{
"height" : 292,
"html_attributions" : [
"\u003ca href=\"https://www.google.com/maps/views/profile/105423912060796272053\"\u003eFrom a Google User\u003c/a\u003e"
],
"photo_reference" : "CmRdAAAAR4bqFTKYWdBwZwdBdON_JRD7V_joTwwIPwRUpZIZWkSSd8GQ3P2O-_aQbUJdL2RhoAyzCUIF0f--DI4oXFneTpj5zZfFq-iFiT7i_x0tjnDveIY8tJv-6o0uWSSjYqabEhCKqQWZqrKAoddjDcc64N48GhQZ2T1_ntPzNKCooHpZzlYQ7AxFOA",
"width" : 438
}
],
"place_id" : "ChIJLfySpTOuEmsRPCRKrzl8ZEY",
"reference" : "CoQBewAAAFd2fO_YWGTiT4RzXWb5tsOuOt7YyV_ScQOwm0tqJSrAyACCczeOzV-P_mgZLro1oKP_34Nt0nVC_1OEKAQUcd7cUm7xmAMSX-EkbSWiD0kOWGgGgKuDRtb0t_8qsxBGU_izugWCyK7SRWezTxELYNdkS0OEiSWPnvhxvXuQktBBEhAAtEe7fagW2kUR14T1QpVsGhQBO7YpIyYSPvo4zUJuL_bX30nJZw",
"scope" : "GOOGLE",
"types" : [ "bar", "restaurant", "food", "point_of_interest", "establishment" ],
"vicinity" : "37 Bank St, Pyrmont"
}
],
"status" : "OK"
}