Android cihazın mevcut konumunu nasıl bulacağınızı öğrenin ve yerle ilgili (işletme veya önemli başka bir nokta) bulunan ayrıntıları otomatik olarak oluşturulur. Android için Haritalar SDK'sı Android için Yerler SDK'sı ve çok kaynaklı Google Play Hizmetleri konum API'lerindeki konum sağlayıcı
Kodu alın
Bu dosyayı klonlayın veya Google Maps Android API v2 Samples deposu'na gidin.
Etkinliğin Java sürümünü görüntüleyin:
// 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.currentplacedetailsonmap; import android.content.DialogInterface; import android.content.pm.PackageManager; import android.location.Location; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.FrameLayout; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.appcompat.app.AlertDialog; import androidx.appcompat.app.AppCompatActivity; import androidx.core.app.ActivityCompat; import androidx.core.content.ContextCompat; 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.CameraPosition; 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 com.google.android.gms.tasks.OnCompleteListener; import com.google.android.gms.tasks.Task; import com.google.android.libraries.places.api.Places; import com.google.android.libraries.places.api.model.Place; import com.google.android.libraries.places.api.model.PlaceLikelihood; import com.google.android.libraries.places.api.net.FindCurrentPlaceRequest; import com.google.android.libraries.places.api.net.FindCurrentPlaceResponse; import com.google.android.libraries.places.api.net.PlacesClient; import java.util.Arrays; import java.util.List; /** * An activity that displays a map showing the place at the device's current location. */ public class MapsActivityCurrentPlace extends AppCompatActivity implements OnMapReadyCallback { private static final String TAG = MapsActivityCurrentPlace.class.getSimpleName(); private GoogleMap map; private CameraPosition cameraPosition; // The entry point to the Places API. private PlacesClient placesClient; // The entry point to the Fused Location Provider. private FusedLocationProviderClient fusedLocationProviderClient; // A default location (Sydney, Australia) and default zoom to use when location permission is // not granted. private final LatLng defaultLocation = new LatLng(-33.8523341, 151.2106085); private static final int DEFAULT_ZOOM = 15; private static final int PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1; private boolean locationPermissionGranted; // The geographical location where the device is currently located. That is, the last-known // location retrieved by the Fused Location Provider. private Location lastKnownLocation; // Keys for storing activity state. private static final String KEY_CAMERA_POSITION = "camera_position"; private static final String KEY_LOCATION = "location"; // Used for selecting the current place. private static final int M_MAX_ENTRIES = 5; private String[] likelyPlaceNames; private String[] likelyPlaceAddresses; private List[] likelyPlaceAttributions; private LatLng[] likelyPlaceLatLngs; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Retrieve location and camera position from saved instance state. if (savedInstanceState != null) { lastKnownLocation = savedInstanceState.getParcelable(KEY_LOCATION); cameraPosition = savedInstanceState.getParcelable(KEY_CAMERA_POSITION); } // Retrieve the content view that renders the map. setContentView(R.layout.activity_maps); // Construct a PlacesClient Places.initialize(getApplicationContext(), BuildConfig.PLACES_API_KEY); placesClient = Places.createClient(this); // Construct a FusedLocationProviderClient. fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this); // Build the map. SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map); mapFragment.getMapAsync(this); } /** * Saves the state of the map when the activity is paused. */ @Override protected void onSaveInstanceState(Bundle outState) { if (map != null) { outState.putParcelable(KEY_CAMERA_POSITION, map.getCameraPosition()); outState.putParcelable(KEY_LOCATION, lastKnownLocation); } super.onSaveInstanceState(outState); } /** * Sets up the options menu. * @param menu The options menu. * @return Boolean. */ @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.current_place_menu, menu); return true; } /** * Handles a click on the menu option to get a place. * @param item The menu item to handle. * @return Boolean. */ @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == R.id.option_get_place) { showCurrentPlace(); } return true; } /** * Manipulates the map when it's available. * This callback is triggered when the map is ready to be used. */ @Override public void onMapReady(GoogleMap map) { this.map = map; // Use a custom info window adapter to handle multiple lines of text in the // info window contents. this.map.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() { @Override // Return null here, so that getInfoContents() is called next. public View getInfoWindow(Marker arg0) { return null; } @Override public View getInfoContents(Marker marker) { // Inflate the layouts for the info window, title and snippet. View infoWindow = getLayoutInflater().inflate(R.layout.custom_info_contents, (FrameLayout) findViewById(R.id.map), false); TextView title = infoWindow.findViewById(R.id.title); title.setText(marker.getTitle()); TextView snippet = infoWindow.findViewById(R.id.snippet); snippet.setText(marker.getSnippet()); return infoWindow; } }); // Prompt the user for permission. getLocationPermission(); // Turn on the My Location layer and the related control on the map. updateLocationUI(); // Get the current location of the device and set the position of the map. getDeviceLocation(); } /** * Gets the current location of the device, and positions the map's camera. */ private void getDeviceLocation() { /* * Get the best and most recent location of the device, which may be null in rare * cases when a location is not available. */ try { if (locationPermissionGranted) { Task<Location> locationResult = fusedLocationProviderClient.getLastLocation(); locationResult.addOnCompleteListener(this, new OnCompleteListener<Location>() { @Override public void onComplete(@NonNull Task<Location> task) { if (task.isSuccessful()) { // Set the map's camera position to the current location of the device. lastKnownLocation = task.getResult(); if (lastKnownLocation != null) { map.moveCamera(CameraUpdateFactory.newLatLngZoom( new LatLng(lastKnownLocation.getLatitude(), lastKnownLocation.getLongitude()), DEFAULT_ZOOM)); } } else { Log.d(TAG, "Current location is null. Using defaults."); Log.e(TAG, "Exception: %s", task.getException()); map.moveCamera(CameraUpdateFactory .newLatLngZoom(defaultLocation, DEFAULT_ZOOM)); map.getUiSettings().setMyLocationButtonEnabled(false); } } }); } } catch (SecurityException e) { Log.e("Exception: %s", e.getMessage(), e); } } /** * Prompts the user for permission to use the device location. */ private void getLocationPermission() { /* * Request location permission, so that we can get the location of the * device. The result of the permission request is handled by a callback, * onRequestPermissionsResult. */ if (ContextCompat.checkSelfPermission(this.getApplicationContext(), android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) { locationPermissionGranted = true; } else { ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION); } } /** * Handles the result of the request for location permissions. */ @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { locationPermissionGranted = false; if (requestCode == PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION) {// If request is cancelled, the result arrays are empty. if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { locationPermissionGranted = true; } } else { super.onRequestPermissionsResult(requestCode, permissions, grantResults); } updateLocationUI(); } /** * Prompts the user to select the current place from a list of likely places, and shows the * current place on the map - provided the user has granted location permission. */ private void showCurrentPlace() { if (map == null) { return; } if (locationPermissionGranted) { // Use fields to define the data types to return. List<Place.Field> placeFields = Arrays.asList(Place.Field.NAME, Place.Field.ADDRESS, Place.Field.LAT_LNG); // Use the builder to create a FindCurrentPlaceRequest. FindCurrentPlaceRequest request = FindCurrentPlaceRequest.newInstance(placeFields); // Get the likely places - that is, the businesses and other points of interest that // are the best match for the device's current location. @SuppressWarnings("MissingPermission") final Task<FindCurrentPlaceResponse> placeResult = placesClient.findCurrentPlace(request); placeResult.addOnCompleteListener (new OnCompleteListener<FindCurrentPlaceResponse>() { @Override public void onComplete(@NonNull Task<FindCurrentPlaceResponse> task) { if (task.isSuccessful() && task.getResult() != null) { FindCurrentPlaceResponse likelyPlaces = task.getResult(); // Set the count, handling cases where less than 5 entries are returned. int count; if (likelyPlaces.getPlaceLikelihoods().size() < M_MAX_ENTRIES) { count = likelyPlaces.getPlaceLikelihoods().size(); } else { count = M_MAX_ENTRIES; } int i = 0; likelyPlaceNames = new String[count]; likelyPlaceAddresses = new String[count]; likelyPlaceAttributions = new List[count]; likelyPlaceLatLngs = new LatLng[count]; for (PlaceLikelihood placeLikelihood : likelyPlaces.getPlaceLikelihoods()) { // Build a list of likely places to show the user. likelyPlaceNames[i] = placeLikelihood.getPlace().getName(); likelyPlaceAddresses[i] = placeLikelihood.getPlace().getAddress(); likelyPlaceAttributions[i] = placeLikelihood.getPlace() .getAttributions(); likelyPlaceLatLngs[i] = placeLikelihood.getPlace().getLatLng(); i++; if (i > (count - 1)) { break; } } // Show a dialog offering the user the list of likely places, and add a // marker at the selected place. MapsActivityCurrentPlace.this.openPlacesDialog(); } else { Log.e(TAG, "Exception: %s", task.getException()); } } }); } else { // The user has not granted permission. Log.i(TAG, "The user did not grant location permission."); // Add a default marker, because the user hasn't selected a place. map.addMarker(new MarkerOptions() .title(getString(R.string.default_info_title)) .position(defaultLocation) .snippet(getString(R.string.default_info_snippet))); // Prompt the user for permission. getLocationPermission(); } } /** * Displays a form allowing the user to select a place from a list of likely places. */ private void openPlacesDialog() { // Ask the user to choose the place where they are now. DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // The "which" argument contains the position of the selected item. LatLng markerLatLng = likelyPlaceLatLngs[which]; String markerSnippet = likelyPlaceAddresses[which]; if (likelyPlaceAttributions[which] != null) { markerSnippet = markerSnippet + "\n" + likelyPlaceAttributions[which]; } // Add a marker for the selected place, with an info window // showing information about that place. map.addMarker(new MarkerOptions() .title(likelyPlaceNames[which]) .position(markerLatLng) .snippet(markerSnippet)); // Position the map's camera at the location of the marker. map.moveCamera(CameraUpdateFactory.newLatLngZoom(markerLatLng, DEFAULT_ZOOM)); } }; // Display the dialog. AlertDialog dialog = new AlertDialog.Builder(this) .setTitle(R.string.pick_place) .setItems(likelyPlaceNames, listener) .show(); } /** * Updates the map's UI settings based on whether the user has granted location permission. */ private void updateLocationUI() { if (map == null) { return; } try { if (locationPermissionGranted) { map.setMyLocationEnabled(true); map.getUiSettings().setMyLocationButtonEnabled(true); } else { map.setMyLocationEnabled(false); map.getUiSettings().setMyLocationButtonEnabled(false); lastKnownLocation = null; getLocationPermission(); } } catch (SecurityException e) { Log.e("Exception: %s", e.getMessage()); } } }
Etkinliğin Kotlin sürümünü görüntüleyin:
// 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.currentplacedetailsonmap import android.Manifest import android.annotation.SuppressLint import android.content.DialogInterface import android.content.pm.PackageManager import android.location.Location import android.os.Bundle import android.util.Log import android.view.Menu import android.view.MenuItem import android.view.View import android.widget.FrameLayout import android.widget.TextView import androidx.appcompat.app.AlertDialog import androidx.appcompat.app.AppCompatActivity import androidx.core.app.ActivityCompat import androidx.core.content.ContextCompat 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.GoogleMap.InfoWindowAdapter import com.google.android.gms.maps.OnMapReadyCallback import com.google.android.gms.maps.SupportMapFragment import com.google.android.gms.maps.model.CameraPosition 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 com.google.android.libraries.places.api.Places import com.google.android.libraries.places.api.model.Place import com.google.android.libraries.places.api.net.FindCurrentPlaceRequest import com.google.android.libraries.places.api.net.PlacesClient /** * An activity that displays a map showing the place at the device's current location. */ class MapsActivityCurrentPlace : AppCompatActivity(), OnMapReadyCallback { private var map: GoogleMap? = null private var cameraPosition: CameraPosition? = null // The entry point to the Places API. private lateinit var placesClient: PlacesClient // The entry point to the Fused Location Provider. private lateinit var fusedLocationProviderClient: FusedLocationProviderClient // A default location (Sydney, Australia) and default zoom to use when location permission is // not granted. private val defaultLocation = LatLng(-33.8523341, 151.2106085) private var locationPermissionGranted = false // The geographical location where the device is currently located. That is, the last-known // location retrieved by the Fused Location Provider. private var lastKnownLocation: Location? = null private var likelyPlaceNames: Array<String?> = arrayOfNulls(0) private var likelyPlaceAddresses: Array<String?> = arrayOfNulls(0) private var likelyPlaceAttributions: Array<List<*>?> = arrayOfNulls(0) private var likelyPlaceLatLngs: Array<LatLng?> = arrayOfNulls(0) override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) // Retrieve location and camera position from saved instance state. if (savedInstanceState != null) { lastKnownLocation = savedInstanceState.getParcelable(KEY_LOCATION) cameraPosition = savedInstanceState.getParcelable(KEY_CAMERA_POSITION) } // Retrieve the content view that renders the map. setContentView(R.layout.activity_maps) // Construct a PlacesClient Places.initialize(applicationContext, BuildConfig.MAPS_API_KEY) placesClient = Places.createClient(this) // Construct a FusedLocationProviderClient. fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this) // Build the map. val mapFragment = supportFragmentManager .findFragmentById(R.id.map) as SupportMapFragment? mapFragment?.getMapAsync(this) } /** * Saves the state of the map when the activity is paused. */ override fun onSaveInstanceState(outState: Bundle) { map?.let { map -> outState.putParcelable(KEY_CAMERA_POSITION, map.cameraPosition) outState.putParcelable(KEY_LOCATION, lastKnownLocation) } super.onSaveInstanceState(outState) } /** * Sets up the options menu. * @param menu The options menu. * @return Boolean. */ override fun onCreateOptionsMenu(menu: Menu): Boolean { menuInflater.inflate(R.menu.current_place_menu, menu) return true } /** * Handles a click on the menu option to get a place. * @param item The menu item to handle. * @return Boolean. */ override fun onOptionsItemSelected(item: MenuItem): Boolean { if (item.itemId == R.id.option_get_place) { showCurrentPlace() } return true } /** * Manipulates the map when it's available. * This callback is triggered when the map is ready to be used. */ override fun onMapReady(map: GoogleMap) { this.map = map // Use a custom info window adapter to handle multiple lines of text in the // info window contents. this.map?.setInfoWindowAdapter(object : InfoWindowAdapter { // Return null here, so that getInfoContents() is called next. override fun getInfoWindow(arg0: Marker): View? { return null } override fun getInfoContents(marker: Marker): View { // Inflate the layouts for the info window, title and snippet. val infoWindow = layoutInflater.inflate(R.layout.custom_info_contents, findViewById<FrameLayout>(R.id.map), false) val title = infoWindow.findViewById<TextView>(R.id.title) title.text = marker.title val snippet = infoWindow.findViewById<TextView>(R.id.snippet) snippet.text = marker.snippet return infoWindow } }) // Prompt the user for permission. getLocationPermission() // Turn on the My Location layer and the related control on the map. updateLocationUI() // Get the current location of the device and set the position of the map. getDeviceLocation() } /** * Gets the current location of the device, and positions the map's camera. */ @SuppressLint("MissingPermission") private fun getDeviceLocation() { /* * Get the best and most recent location of the device, which may be null in rare * cases when a location is not available. */ try { if (locationPermissionGranted) { val locationResult = fusedLocationProviderClient.lastLocation locationResult.addOnCompleteListener(this) { task -> if (task.isSuccessful) { // Set the map's camera position to the current location of the device. lastKnownLocation = task.result if (lastKnownLocation != null) { map?.moveCamera(CameraUpdateFactory.newLatLngZoom( LatLng(lastKnownLocation!!.latitude, lastKnownLocation!!.longitude), DEFAULT_ZOOM.toFloat())) } } else { Log.d(TAG, "Current location is null. Using defaults.") Log.e(TAG, "Exception: %s", task.exception) map?.moveCamera(CameraUpdateFactory .newLatLngZoom(defaultLocation, DEFAULT_ZOOM.toFloat())) map?.uiSettings?.isMyLocationButtonEnabled = false } } } } catch (e: SecurityException) { Log.e("Exception: %s", e.message, e) } } /** * Prompts the user for permission to use the device location. */ private fun getLocationPermission() { /* * Request location permission, so that we can get the location of the * device. The result of the permission request is handled by a callback, * onRequestPermissionsResult. */ if (ContextCompat.checkSelfPermission(this.applicationContext, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) { locationPermissionGranted = true } else { ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION) } } /** * Handles the result of the request for location permissions. */ override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) { locationPermissionGranted = false when (requestCode) { PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION -> { // If request is cancelled, the result arrays are empty. if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) { locationPermissionGranted = true } } else -> super.onRequestPermissionsResult(requestCode, permissions, grantResults) } updateLocationUI() } /** * Prompts the user to select the current place from a list of likely places, and shows the * current place on the map - provided the user has granted location permission. */ @SuppressLint("MissingPermission") private fun showCurrentPlace() { if (map == null) { return } if (locationPermissionGranted) { // Use fields to define the data types to return. val placeFields = listOf(Place.Field.NAME, Place.Field.ADDRESS, Place.Field.LAT_LNG) // Use the builder to create a FindCurrentPlaceRequest. val request = FindCurrentPlaceRequest.newInstance(placeFields) // Get the likely places - that is, the businesses and other points of interest that // are the best match for the device's current location. val placeResult = placesClient.findCurrentPlace(request) placeResult.addOnCompleteListener { task -> if (task.isSuccessful && task.result != null) { val likelyPlaces = task.result // Set the count, handling cases where less than 5 entries are returned. val count = if (likelyPlaces != null && likelyPlaces.placeLikelihoods.size < M_MAX_ENTRIES) { likelyPlaces.placeLikelihoods.size } else { M_MAX_ENTRIES } var i = 0 likelyPlaceNames = arrayOfNulls(count) likelyPlaceAddresses = arrayOfNulls(count) likelyPlaceAttributions = arrayOfNulls<List<*>?>(count) likelyPlaceLatLngs = arrayOfNulls(count) for (placeLikelihood in likelyPlaces?.placeLikelihoods ?: emptyList()) { // Build a list of likely places to show the user. likelyPlaceNames[i] = placeLikelihood.place.name likelyPlaceAddresses[i] = placeLikelihood.place.address likelyPlaceAttributions[i] = placeLikelihood.place.attributions likelyPlaceLatLngs[i] = placeLikelihood.place.latLng i++ if (i > count - 1) { break } } // Show a dialog offering the user the list of likely places, and add a // marker at the selected place. openPlacesDialog() } else { Log.e(TAG, "Exception: %s", task.exception) } } } else { // The user has not granted permission. Log.i(TAG, "The user did not grant location permission.") // Add a default marker, because the user hasn't selected a place. map?.addMarker(MarkerOptions() .title(getString(R.string.default_info_title)) .position(defaultLocation) .snippet(getString(R.string.default_info_snippet))) // Prompt the user for permission. getLocationPermission() } } /** * Displays a form allowing the user to select a place from a list of likely places. */ private fun openPlacesDialog() { // Ask the user to choose the place where they are now. val listener = DialogInterface.OnClickListener { dialog, which -> // The "which" argument contains the position of the selected item. val markerLatLng = likelyPlaceLatLngs[which] var markerSnippet = likelyPlaceAddresses[which] if (likelyPlaceAttributions[which] != null) { markerSnippet = """ $markerSnippet ${likelyPlaceAttributions[which]} """.trimIndent() } if (markerLatLng == null) { return@OnClickListener } // Add a marker for the selected place, with an info window // showing information about that place. map?.addMarker(MarkerOptions() .title(likelyPlaceNames[which]) .position(markerLatLng) .snippet(markerSnippet)) // Position the map's camera at the location of the marker. map?.moveCamera(CameraUpdateFactory.newLatLngZoom(markerLatLng, DEFAULT_ZOOM.toFloat())) } // Display the dialog. AlertDialog.Builder(this) .setTitle(R.string.pick_place) .setItems(likelyPlaceNames, listener) .show() } /** * Updates the map's UI settings based on whether the user has granted location permission. */ @SuppressLint("MissingPermission") private fun updateLocationUI() { if (map == null) { return } try { if (locationPermissionGranted) { map?.isMyLocationEnabled = true map?.uiSettings?.isMyLocationButtonEnabled = true } else { map?.isMyLocationEnabled = false map?.uiSettings?.isMyLocationButtonEnabled = false lastKnownLocation = null getLocationPermission() } } catch (e: SecurityException) { Log.e("Exception: %s", e.message, e) } } companion object { private val TAG = MapsActivityCurrentPlace::class.java.simpleName private const val DEFAULT_ZOOM = 15 private const val PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1 // Keys for storing activity state. private const val KEY_CAMERA_POSITION = "camera_position" private const val KEY_LOCATION = "location" // Used for selecting the current place. private const val M_MAX_ENTRIES = 5 } }
Geliştirme projenizi oluşturun
Android Studio'da eğitim projesini oluşturmak için aşağıdaki adımları uygulayın.
- İndir ve yükleme Android Studio'ya gidin.
- Ekle Google Play Hizmetleri paketini Android'e Stüdyo'yu seçin.
- Klonlama veya Google Maps Android API v2 Samples deposunu indirin. , bu eğiticiyi okumaya başladığınızda bunu yapmadınız.
Eğitim projesini içe aktarın:
- Android Studio'da Dosya > Yeni > İçe aktarma Proje.
- Google Haritalar Android API v2 Sana Özel deposu, indirdikten sonra
- CurrentPlaceDetailsOnMap projesini şurada bulun:
konum:
PATH-TO-SAVED-REPO/android-samples/tutorials/java/CurrentPlaceDetailsOnMap
(Java) veya
PATH-TO-SAVED-REPO/android-samples/tutorials/kotlin/CurrentPlaceDetailsOnMap
(Kotlin) - Proje dizinini seçip Aç'ı tıklayın. Android Studio, artık Gradle derleme aracını kullanarak projenizi derliyor.
Gerekli API'leri etkinleştirin ve bir API anahtarı alın
Bu eğiticiyi tamamlamak için gerekli koşulları içeren bir Google Cloud projenize ihtiyacınız var: Etkinleştirilen API'ler ve Android için Haritalar SDK'sını kullanma yetkisi olan bir API anahtarı. Ayrıntılı bilgi için:
ziyaret edin.Etkin API'lerinizin API'lerini görüntülemek için Google Haritalar Platformu sayfasına gidin açın ve projenizi seçin:
Google Haritalar Platformu sayfasına gitPlaces API'nin projenizde etkinleştirildiğini görmüyorsanız, bu API'yi etkinleştirmeniz gerekir:
Yerler API'sini etkinleştirmeAPI anahtarınıza kısıtlama eklerseniz Places API'yi eklediğinizden emin olun anahtara bağlayacağım. API Anahtarlarını Kullanma bölümüne bakın konulu videomuzu izleyin.
API anahtarını uygulamanıza ekleyin
- Projenizin
local.properties
dosyasını açın. Aşağıdaki dizeyi ekleyin ve
YOUR_API_KEY
değerini API anahtarınızın değeriyle değiştirin:MAPS_API_KEY=YOUR_API_KEY
Uygulamanızı oluştururken Android için Secrets Gradle Plugin API anahtarını kopyalar ve Android manifest dosyasında bir derleme değişkeni olarak kullanılabilir hale getirir.
Uygulamanızı derleyip çalıştırma
Bilgisayarınıza bir Android cihaz bağlayın. Şunu izleyin: talimatları Android cihazınızdaki geliştirici seçeneklerini etkinleştirin ve sisteminizi yapılandırın entegre eder.
Alternatif olarak, Android Sanal Cihaz (AVD) Yöneticisi'ni seçin. Emülatör seçerken Google API'lerini içeren bir resim seçtiğinizden emin olun. Daha fazla bilgi için Android Studio Projesi Oluşturma
- Android Studio'da Çalıştır menü seçeneğini (veya düğme simgesi). İstendiği şekilde bir cihaz seçin.
Android Studio, uygulamayı derlemek için Gradle'ı çağırır ve ardından uygulamayı cihaz üzerinde veya emülatörde. Bir dizi işaretçi bulunan bir harita göreceksiniz bu sayfadaki resme benzer şekilde, mevcut konumunuzun çevresinde ortalanmış olarak gösterilir.
- Yer (işletme veya başka bir önemli yer) listesini açmak için Yer Al'ı seçin mevcut konumunuza yakın.
- Listeden bir yer seçin. Seçilen yer için haritaya bir işaretçi eklenir.
Sorun Giderme:
- Harita görmüyorsanız bir API anahtarı edinip eklediğinizden emin olun yukarıda açıklandığı gibi uygulamaya eklemeniz gerekir. Giriş yapmayı kontrol edin Android Studio'nun Android API anahtarıyla ilgili hata mesajlarını izleyin.
- Haritada Sidney Liman Köprüsü'nde yalnızca bir işaretçi gösteriliyorsa (uygulamada belirtilen varsayılan konum) her ikisine de izin verdiğinizden emin olun: konum iznini kullanmanız gerekir. Uygulama şunları istiyor: şu konumda açıklanan kalıbı uygulayarak çalışma zamanında konum izni: Android izin rehberini inceleyin. İzinleri doğrudan şurada da ayarlayabilirsiniz: Ayarlar > Uygulamalar > uygulama adı > İzinler > Konum. Ayrıntılı bilgi için daha fazla bilgi edinmek için aşağıdaki istekte bulunma uygulamanızda konum izni.
- Şunu kullanın: Android Günlükleri görüntülemek ve uygulamada hata ayıklamak için Studio hata ayıklama araçları
Kodu anlama
Eğiticinin bu bölümünde, çevrimiçi görüntülü reklam kampanyalarınızın CurrentPlaceDetailsOnMap uygulamasında geliştirmenizi sağlar.
Places API istemcisini örneklendirme
Bu nesneler, Android için Yerler SDK'sına birincil giriş noktalarıdır:
- İlgili içeriği oluşturmak için kullanılan
Places
class, Android için Yerler SDK'sına ilişkin istemciler oluşturur ve yönetir. - İlgili içeriği oluşturmak için kullanılan
PlacesClient
arayüzü, cihazın mevcut konumunu ve konumun yakınındaki yerleri alır.
LocationServices arayüzü, Android konum hizmetleri için ana giriş noktasıdır.
API'leri kullanmak için
onCreate()
hakkında daha fazla bilgi edinin:
- Bir
Places
nesnesini başlatın. - Bir
PlacesClient
nesnesi oluşturun. - Bir
FusedLocationProviderClient
nesnesi oluşturun.
Örneğin:
Java
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // ... // Retrieve the content view that renders the map. setContentView(R.layout.activity_maps); // Construct a PlacesClient Places.initialize(getApplicationContext(), getString(R.string.maps_api_key)); placesClient = Places.createClient(this); // Construct a FusedLocationProviderClient. fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this); }
Kotlin
override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) // ... // Retrieve the content view that renders the map. setContentView(R.layout.activity_maps) // Construct a PlacesClient Places.initialize(applicationContext, getString(R.string.maps_api_key)) placesClient = Places.createClient(this) // Construct a FusedLocationProviderClient. fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this) }
Konum izni iste
Uygulamanızın, konumu ve kullanıcının Konumum'a dokunmasına izin vermek için tıklayın.
Bu eğitimde, hassas konum izni istemek için ihtiyacınız olan kod sağlanmaktadır. Daha fazla bilgi edinmek için Android izinleriyle ilgili daha fazla bilgi edinin.
İzni
<manifest>
öğesinin alt öğesi olarak ekleyin öğesine dokunun:<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.currentplacedetailsonmap"> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> </manifest>
Uygulamanızda çalışma zamanında istenen izinleri isteme, izin verme veya reddetme fırsatı verir. Aşağıdaki kod kontrolleri Kullanıcının hassas konum izni verip vermediği. Aksi halde izin:
Java
private void getLocationPermission() { /* * Request location permission, so that we can get the location of the * device. The result of the permission request is handled by a callback, * onRequestPermissionsResult. */ if (ContextCompat.checkSelfPermission(this.getApplicationContext(), android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) { locationPermissionGranted = true; } else { ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION); } }
Kotlin
private fun getLocationPermission() { /* * Request location permission, so that we can get the location of the * device. The result of the permission request is handled by a callback, * onRequestPermissionsResult. */ if (ContextCompat.checkSelfPermission(this.applicationContext, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) { locationPermissionGranted = true } else { ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION) } }
onRequestPermissionsResult()
geri çağırmasını şuna geçersiz kıl: şu sonuçları işler:Java
@Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { locationPermissionGranted = false; if (requestCode == PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION) {// If request is cancelled, the result arrays are empty. if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { locationPermissionGranted = true; } } else { super.onRequestPermissionsResult(requestCode, permissions, grantResults); } updateLocationUI(); }
Kotlin
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) { locationPermissionGranted = false when (requestCode) { PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION -> { // If request is cancelled, the result arrays are empty. if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) { locationPermissionGranted = true } } else -> super.onRequestPermissionsResult(requestCode, permissions, grantResults) } updateLocationUI() }
Bu eğiticinin sonraki bölümlerinde
updateLocationUI()
yöntemini çağırın.
Harita ekleme
Android için Haritalar SDK'sını kullanarak bir harita görüntüleyin.
Etkinliğinizin düzenine
<fragment>
öğesi ekleyin dosyası,activity_maps.xml
. Bu öğe, birSupportMapFragment
harita için bir kapsayıcı görevi görmek veGoogleMap
nesne. Eğitim, Android destek kitaplığını kullanır sürümünü kullanmaya devam edebilirsiniz. sürümleri olabilir.<!-- 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. --> <fragment xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/map" android:name="com.google.android.gms.maps.SupportMapFragment" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.currentplacedetailsonmap.MapsActivityCurrentPlace" />
Etkinliğinizin
onCreate()
yönteminde düzen dosyasını ayarlayın iki yöntem vardır:Java
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Retrieve the content view that renders the map. setContentView(R.layout.activity_maps); }
Kotlin
override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) // Retrieve the content view that renders the map. setContentView(R.layout.activity_maps) }
Şunu uygulayın:
OnMapReadyCallback
arayüzünü ayarlamak veonMapReady()
yöntemini geçersiz kılmak içinGoogleMap
nesnesi kullanılabilir olduğunda harita oluşturun:Java
@Override public void onMapReady(GoogleMap map) { this.map = map; // ... // Turn on the My Location layer and the related control on the map. updateLocationUI(); // Get the current location of the device and set the position of the map. getDeviceLocation(); }
Kotlin
override fun onMapReady(map: GoogleMap) { this.map = map // ... // Turn on the My Location layer and the related control on the map. updateLocationUI() // Get the current location of the device and set the position of the map. getDeviceLocation() }
Etkinliğinizin
onCreate()
yönteminde herkese açık kullanıcı adı alın. harita parçasını çağırarakFragmentManager.findFragmentById()
Daha sonragetMapAsync()
harita geri çağırmasına kaydolmak için:Java
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map); mapFragment.getMapAsync(this);
Kotlin
val mapFragment = supportFragmentManager .findFragmentById(R.id.map) as SupportMapFragment? mapFragment?.getMapAsync(this)
Konumu ayarlamak için bir
updateLocationUI()
yöntemi yazın haritada daha fazla kontrol edin. Kullanıcı konum izni verdiyse üzerindeki Konumum katmanını ve haritadaki ilgili denetimi katmanını ve kontrolü ekleyip geçerli konumu null değerine ayarlayın:Java
private void updateLocationUI() { if (map == null) { return; } try { if (locationPermissionGranted) { map.setMyLocationEnabled(true); map.getUiSettings().setMyLocationButtonEnabled(true); } else { map.setMyLocationEnabled(false); map.getUiSettings().setMyLocationButtonEnabled(false); lastKnownLocation = null; getLocationPermission(); } } catch (SecurityException e) { Log.e("Exception: %s", e.getMessage()); } }
Kotlin
@SuppressLint("MissingPermission") private fun updateLocationUI() { if (map == null) { return } try { if (locationPermissionGranted) { map?.isMyLocationEnabled = true map?.uiSettings?.isMyLocationButtonEnabled = true } else { map?.isMyLocationEnabled = false map?.uiSettings?.isMyLocationButtonEnabled = false lastKnownLocation = null getLocationPermission() } } catch (e: SecurityException) { Log.e("Exception: %s", e.message, e) } }
Android cihazın konumunu alma ve haritayı konumlandırma
Cihazın en son bilinen konumunu bulmak için çok kaynaklı konum sağlayıcısını kullanın. ardından haritayı konumlandırmak için bu konumu kullanın. Eğiticide, bu bilgilerin gerekiyor. Cihazın konumunu alma hakkında daha fazla bilgi için çok kaynaklı Google Play Hizmetleri konum API'lerindeki konum sağlayıcı'yı tıklayın.
Java
private void getDeviceLocation() { /* * Get the best and most recent location of the device, which may be null in rare * cases when a location is not available. */ try { if (locationPermissionGranted) { Task<Location> locationResult = fusedLocationProviderClient.getLastLocation(); locationResult.addOnCompleteListener(this, new OnCompleteListener<Location>() { @Override public void onComplete(@NonNull Task<Location> task) { if (task.isSuccessful()) { // Set the map's camera position to the current location of the device. lastKnownLocation = task.getResult(); if (lastKnownLocation != null) { map.moveCamera(CameraUpdateFactory.newLatLngZoom( new LatLng(lastKnownLocation.getLatitude(), lastKnownLocation.getLongitude()), DEFAULT_ZOOM)); } } else { Log.d(TAG, "Current location is null. Using defaults."); Log.e(TAG, "Exception: %s", task.getException()); map.moveCamera(CameraUpdateFactory .newLatLngZoom(defaultLocation, DEFAULT_ZOOM)); map.getUiSettings().setMyLocationButtonEnabled(false); } } }); } } catch (SecurityException e) { Log.e("Exception: %s", e.getMessage(), e); } }
Kotlin
@SuppressLint("MissingPermission") private fun getDeviceLocation() { /* * Get the best and most recent location of the device, which may be null in rare * cases when a location is not available. */ try { if (locationPermissionGranted) { val locationResult = fusedLocationProviderClient.lastLocation locationResult.addOnCompleteListener(this) { task -> if (task.isSuccessful) { // Set the map's camera position to the current location of the device. lastKnownLocation = task.result if (lastKnownLocation != null) { map?.moveCamera(CameraUpdateFactory.newLatLngZoom( LatLng(lastKnownLocation!!.latitude, lastKnownLocation!!.longitude), DEFAULT_ZOOM.toFloat())) } } else { Log.d(TAG, "Current location is null. Using defaults.") Log.e(TAG, "Exception: %s", task.exception) map?.moveCamera(CameraUpdateFactory .newLatLngZoom(defaultLocation, DEFAULT_ZOOM.toFloat())) map?.uiSettings?.isMyLocationButtonEnabled = false } } } } catch (e: SecurityException) { Log.e("Exception: %s", e.message, e) } }
Geçerli yeri bulma
Android için Yerler SDK'sını kullanarak cihazınızın mevcut konumuna bağlıdır. Bu bağlamda yer, bir işletmedir veya başka bir önemli yere ekleyin.
Bu eğitimde, kullanıcı bir Yer Al düğmesi. Kullanıcıya olası yerlerin bir listesini sunar seçim yapar, ardından seçilen yerin konumuna haritaya bir işaretçi ekler yer. Eğitici, Android için Yerler SDK'sı. Daha fazla bilgi edinmek için geçerli yeri öğrenmeniz gerekir.
- Seçenekler için bir düzen dosyası (
current_place_menu.xml
) oluşturun ayarlamak veonCreateOptionsMenu()
yöntemini geçersiz kılmak için seçenekler menüsüne gidin. Kod için birlikte verilen örnek uygulamaya bakın. - Şu değeri almak için
onOptionsItemSelected()
yöntemini geçersiz kılın: kullanıcı Yer Al seçeneğini tıkladığında güncel yeri:Java
@Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == R.id.option_get_place) { showCurrentPlace(); } return true; }
Kotlin
override fun onOptionsItemSelected(item: MenuItem): Boolean { if (item.itemId == R.id.option_get_place) { showCurrentPlace() } return true }
Olası öğelerin listesini almak için
showCurrentPlace()
yöntemi oluşturun yer, cihazın geçerli konumu:Java
private void showCurrentPlace() { if (map == null) { return; } if (locationPermissionGranted) { // Use fields to define the data types to return. List<Place.Field> placeFields = Arrays.asList(Place.Field.NAME, Place.Field.ADDRESS, Place.Field.LAT_LNG); // Use the builder to create a FindCurrentPlaceRequest. FindCurrentPlaceRequest request = FindCurrentPlaceRequest.newInstance(placeFields); // Get the likely places - that is, the businesses and other points of interest that // are the best match for the device's current location. @SuppressWarnings("MissingPermission") final Task<FindCurrentPlaceResponse> placeResult = placesClient.findCurrentPlace(request); placeResult.addOnCompleteListener (new OnCompleteListener<FindCurrentPlaceResponse>() { @Override public void onComplete(@NonNull Task<FindCurrentPlaceResponse> task) { if (task.isSuccessful() && task.getResult() != null) { FindCurrentPlaceResponse likelyPlaces = task.getResult(); // Set the count, handling cases where less than 5 entries are returned. int count; if (likelyPlaces.getPlaceLikelihoods().size() < M_MAX_ENTRIES) { count = likelyPlaces.getPlaceLikelihoods().size(); } else { count = M_MAX_ENTRIES; } int i = 0; likelyPlaceNames = new String[count]; likelyPlaceAddresses = new String[count]; likelyPlaceAttributions = new List[count]; likelyPlaceLatLngs = new LatLng[count]; for (PlaceLikelihood placeLikelihood : likelyPlaces.getPlaceLikelihoods()) { // Build a list of likely places to show the user. likelyPlaceNames[i] = placeLikelihood.getPlace().getName(); likelyPlaceAddresses[i] = placeLikelihood.getPlace().getAddress(); likelyPlaceAttributions[i] = placeLikelihood.getPlace() .getAttributions(); likelyPlaceLatLngs[i] = placeLikelihood.getPlace().getLatLng(); i++; if (i > (count - 1)) { break; } } // Show a dialog offering the user the list of likely places, and add a // marker at the selected place. MapsActivityCurrentPlace.this.openPlacesDialog(); } else { Log.e(TAG, "Exception: %s", task.getException()); } } }); } else { // The user has not granted permission. Log.i(TAG, "The user did not grant location permission."); // Add a default marker, because the user hasn't selected a place. map.addMarker(new MarkerOptions() .title(getString(R.string.default_info_title)) .position(defaultLocation) .snippet(getString(R.string.default_info_snippet))); // Prompt the user for permission. getLocationPermission(); } }
Kotlin
@SuppressLint("MissingPermission") private fun showCurrentPlace() { if (map == null) { return } if (locationPermissionGranted) { // Use fields to define the data types to return. val placeFields = listOf(Place.Field.NAME, Place.Field.ADDRESS, Place.Field.LAT_LNG) // Use the builder to create a FindCurrentPlaceRequest. val request = FindCurrentPlaceRequest.newInstance(placeFields) // Get the likely places - that is, the businesses and other points of interest that // are the best match for the device's current location. val placeResult = placesClient.findCurrentPlace(request) placeResult.addOnCompleteListener { task -> if (task.isSuccessful && task.result != null) { val likelyPlaces = task.result // Set the count, handling cases where less than 5 entries are returned. val count = if (likelyPlaces != null && likelyPlaces.placeLikelihoods.size < M_MAX_ENTRIES) { likelyPlaces.placeLikelihoods.size } else { M_MAX_ENTRIES } var i = 0 likelyPlaceNames = arrayOfNulls(count) likelyPlaceAddresses = arrayOfNulls(count) likelyPlaceAttributions = arrayOfNulls<List<*>?>(count) likelyPlaceLatLngs = arrayOfNulls(count) for (placeLikelihood in likelyPlaces?.placeLikelihoods ?: emptyList()) { // Build a list of likely places to show the user. likelyPlaceNames[i] = placeLikelihood.place.name likelyPlaceAddresses[i] = placeLikelihood.place.address likelyPlaceAttributions[i] = placeLikelihood.place.attributions likelyPlaceLatLngs[i] = placeLikelihood.place.latLng i++ if (i > count - 1) { break } } // Show a dialog offering the user the list of likely places, and add a // marker at the selected place. openPlacesDialog() } else { Log.e(TAG, "Exception: %s", task.exception) } } } else { // The user has not granted permission. Log.i(TAG, "The user did not grant location permission.") // Add a default marker, because the user hasn't selected a place. map?.addMarker(MarkerOptions() .title(getString(R.string.default_info_title)) .position(defaultLocation) .snippet(getString(R.string.default_info_snippet))) // Prompt the user for permission. getLocationPermission() } }
Formu görüntülemek için
openPlacesDialog()
yöntemi oluşturun kullanıcının olası yerler listesinden bir yer seçmesine olanak tanır. Bir haritadaki işaretçiyi kullanın. İşaretçi içeriği yerin adı ve adresi ve API'nin sağladığı özellikler:Java
private void openPlacesDialog() { // Ask the user to choose the place where they are now. DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // The "which" argument contains the position of the selected item. LatLng markerLatLng = likelyPlaceLatLngs[which]; String markerSnippet = likelyPlaceAddresses[which]; if (likelyPlaceAttributions[which] != null) { markerSnippet = markerSnippet + "\n" + likelyPlaceAttributions[which]; } // Add a marker for the selected place, with an info window // showing information about that place. map.addMarker(new MarkerOptions() .title(likelyPlaceNames[which]) .position(markerLatLng) .snippet(markerSnippet)); // Position the map's camera at the location of the marker. map.moveCamera(CameraUpdateFactory.newLatLngZoom(markerLatLng, DEFAULT_ZOOM)); } }; // Display the dialog. AlertDialog dialog = new AlertDialog.Builder(this) .setTitle(R.string.pick_place) .setItems(likelyPlaceNames, listener) .show(); }
Kotlin
private fun openPlacesDialog() { // Ask the user to choose the place where they are now. val listener = DialogInterface.OnClickListener { dialog, which -> // The "which" argument contains the position of the selected item. val markerLatLng = likelyPlaceLatLngs[which] var markerSnippet = likelyPlaceAddresses[which] if (likelyPlaceAttributions[which] != null) { markerSnippet = """ $markerSnippet ${likelyPlaceAttributions[which]} """.trimIndent() } if (markerLatLng == null) { return@OnClickListener } // Add a marker for the selected place, with an info window // showing information about that place. map?.addMarker(MarkerOptions() .title(likelyPlaceNames[which]) .position(markerLatLng) .snippet(markerSnippet)) // Position the map's camera at the location of the marker. map?.moveCamera(CameraUpdateFactory.newLatLngZoom(markerLatLng, DEFAULT_ZOOM.toFloat())) } // Display the dialog. AlertDialog.Builder(this) .setTitle(R.string.pick_place) .setItems(likelyPlaceNames, listener) .show() }
Bilgi penceresi içeriği için özel bir düzen oluşturun. Bu da, bilgi penceresinde birden çok içerik satırı görüntülenmesini sağlar. İlk olarak, metin içeren bir XML düzen dosyası (
custom_info_contents.xml
) bilgi penceresi başlığı için, snippet için de başka bir metin görünümü ( ise, bilgi penceresinin metin içeriği):<?xml version="1.0" encoding="utf-8"?> <!-- 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. --> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layoutDirection="locale" android:orientation="vertical"> <TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:textColor="#ff000000" android:textStyle="bold" /> <TextView android:id="@+id/snippet" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="#ff7f7f7f" /> </LinearLayout>
Şunu uygulayın:
InfoWindowAdapter
oluşturmak ve bilgi penceresi içeriğini yüklemek için aşağıdaki adımları uygulayın:Java
// Use a custom info window adapter to handle multiple lines of text in the // info window contents. this.map.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() { @Override // Return null here, so that getInfoContents() is called next. public View getInfoWindow(Marker arg0) { return null; } @Override public View getInfoContents(Marker marker) { // Inflate the layouts for the info window, title and snippet. View infoWindow = getLayoutInflater().inflate(R.layout.custom_info_contents, (FrameLayout) findViewById(R.id.map), false); TextView title = infoWindow.findViewById(R.id.title); title.setText(marker.getTitle()); TextView snippet = infoWindow.findViewById(R.id.snippet); snippet.setText(marker.getSnippet()); return infoWindow; } });
Kotlin
// Use a custom info window adapter to handle multiple lines of text in the // info window contents. this.map?.setInfoWindowAdapter(object : InfoWindowAdapter { // Return null here, so that getInfoContents() is called next. override fun getInfoWindow(arg0: Marker): View? { return null } override fun getInfoContents(marker: Marker): View { // Inflate the layouts for the info window, title and snippet. val infoWindow = layoutInflater.inflate(R.layout.custom_info_contents, findViewById<FrameLayout>(R.id.map), false) val title = infoWindow.findViewById<TextView>(R.id.title) title.text = marker.title val snippet = infoWindow.findViewById<TextView>(R.id.snippet) snippet.text = marker.snippet return infoWindow } })
Haritanın durumunu kaydetme
Haritanın kamera konumunu ve cihaz konumunu kaydedin. Kullanıcı dönüşümlü yayınladığında veya yapılandırma değişiklikleri yaptığında, Android sistem harita etkinliğini yok eder ve yeniden oluşturur. Sorunsuz bir kullanıcı deneyimi sağlamak için ilgili uygulama durumunu depolamak ve gerektiğinde geri yüklemek iyidir.
Haritanın durumunu kaydetmek için ihtiyacınız olan tüm kodları bu eğiticide bulabilirsiniz. Örneğin,
daha fazla ayrıntı için
savedInstanceState
paketi'ne dokunun.
Harita etkinliğinizde, etkinlik durumunu depolamak için anahtar/değer çiftleri ayarlayın:
Java
private static final String KEY_CAMERA_POSITION = "camera_position"; private static final String KEY_LOCATION = "location";
Kotlin
private const val KEY_CAMERA_POSITION = "camera_position" private const val KEY_LOCATION = "location"
onSaveInstanceState()
geri çağırma işlevini kullanarak Etkinlik durakladığında geçerli olur:Java
@Override protected void onSaveInstanceState(Bundle outState) { if (map != null) { outState.putParcelable(KEY_CAMERA_POSITION, map.getCameraPosition()); outState.putParcelable(KEY_LOCATION, lastKnownLocation); } super.onSaveInstanceState(outState); }
Kotlin
override fun onSaveInstanceState(outState: Bundle) { map?.let { map -> outState.putParcelable(KEY_CAMERA_POSITION, map.cameraPosition) outState.putParcelable(KEY_LOCATION, lastKnownLocation) } super.onSaveInstanceState(outState) }
Etkinliğinizin
onCreate()
yönteminde daha önce kaydedilmişse cihazın konumu ve haritanın kamera konumu:Java
// Retrieve location and camera position from saved instance state. if (savedInstanceState != null) { lastKnownLocation = savedInstanceState.getParcelable(KEY_LOCATION); cameraPosition = savedInstanceState.getParcelable(KEY_CAMERA_POSITION); }
Kotlin
if (savedInstanceState != null) { lastKnownLocation = savedInstanceState.getParcelable(KEY_LOCATION) cameraPosition = savedInstanceState.getParcelable(KEY_CAMERA_POSITION) }