所以，我有一个使用地图api打开uo google的活动，我能够用自动完成搜索的地方，但我如何使用LatLng获得neasrt "地方"？
更多细节，在活动Luanch上，它返回最后已知的位置作为用户的当前位置，但这只是LatLng，我如何使用这个LatLng来获得附近的地方？场所 使用 google place api.
谢谢你。
public class Map extends AppCompatActivity {
//google map required variables
private static final String TAG = "MapActivity";
private static final String FINE_LOCATION = Manifest.permission.ACCESS_FINE_LOCATION;
private static final String COURSE_LOCATION = Manifest.permission.ACCESS_COARSE_LOCATION;
private static final float ZOOMING_DEFAULT = 18.0f;
private static final int LOCATION_PERMISSION_REQUEST_CODE = 9999;
private SupportMapFragment MysupportMapFragment;
private FusedLocationProviderClient MyfusedLocationProviderClient;
private GoogleMap MyMap;
private static final int AUTOCOMPLETE_REQUEST_CODE = 1;
//local variables
private Boolean MyLocationPermissionsGranted = false;
private Location Mylocation;
private LatLng MylatLng;
private List<Place.Field> fieldList;
private Place AutocompletedPlaces;
//need to be accessed in multiple activities/classes
private LatLng SearchedLocationlatLng;
private String SearchedlocationAddress;
private String SearchedlocationName;
//widgets
private EditText editTextsearchlocation;
private Button btnConfirmAddress;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map);
MysupportMapFragment
= (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.fragment_map);
MyfusedLocationProviderClient
= LocationServices.getFusedLocationProviderClient(this);
if (checkLocationPermission()){
getCurrentLocation();
}
Log.d(TAG, "onCreate: initializing GOOGLE Places");
Places.initialize(getApplicationContext(),"API_KEY");
editTextsearchlocation = findViewById(R.id.edittext_SearchBar);
editTextsearchlocation.setFocusable(false);
editTextsearchlocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: initialize place field list");
fieldList = Arrays.asList(Place.Field.ADDRESS,Place.Field.LAT_LNG,Place.Field.NAME);
Log.d(TAG, "onClick: initialize place autoComplete");
Intent searchPlaceIntent = new Autocomplete.IntentBuilder(
AutocompleteActivityMode.OVERLAY, fieldList).build(Map.this);
startActivityForResult(searchPlaceIntent,AUTOCOMPLETE_REQUEST_CODE);
}
});
btnConfirmAddress = findViewById(R.id.btnConfirmSearchedAddress);
btnConfirmAddress.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//passlocation to checkin fragment
//code incomplete
//Also trying to find out how to pass data from multiple activity to one activity's fragment.
finish();
}
});
}
// above for btnConfirmAddress
// When you call an activity from other activity's fragment, then the previous activity's instance
// state that is the calling activity which was having fragment's instance state will be saved
// in stack...so all u need to do is finish the called activity and u will have the fragment
// from which you called your second activity.
private boolean checkLocationPermission() {
Log.d(TAG, "getLocationPermission: getting Location Permission");
String[] permissions = {FINE_LOCATION,COURSE_LOCATION};
if (ContextCompat.checkSelfPermission(this.getApplicationContext(),FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED){
if (ContextCompat.checkSelfPermission(this.getApplicationContext(),COURSE_LOCATION)
== PackageManager.PERMISSION_GRANTED)
{
Log.d(TAG, "CheckLocationPermission: All permisiion Granted,Continue.");
//
return true;
} else {
Log.d(TAG, "CheckLocationPermission: Request For COURSE_LOCATION");
ActivityCompat.requestPermissions(this,permissions
,LOCATION_PERMISSION_REQUEST_CODE);
return false;
}
} else {
Log.d(TAG, "CheckLocationPermission: Request For FINE_LOCATION");
ActivityCompat.requestPermissions(this,permissions
,LOCATION_PERMISSION_REQUEST_CODE);
return false;
}
}
private void getCurrentLocation() {
Log.d(TAG, "GetCurrentLocation: Getting Last Known Location from System");
Task<Location> task = MyfusedLocationProviderClient.getLastLocation();
task.addOnSuccessListener(new OnSuccessListener<Location>() {
@Override
public void onSuccess(final Location location) {
if (location != null){
Mylocation=location;
initializeMap(Mylocation);
}
}
});
}
private void initializeMap(final Location location) {
Log.d(TAG, "onSuccess: Successfully Obtaining Last Known Location");
MysupportMapFragment.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap googleMap) {
Log.d(TAG, "onMapReady: Initialize Latitude and Longitude");
MyMap = googleMap;
MylatLng = new LatLng(location.getLatitude()
,location.getLongitude());
Log.d(TAG, "onMapReady: Drop A Marker On My current location");
MarkerOptions Marker = new MarkerOptions().position(MylatLng)
.title("Your Current Location");
MyMap.addMarker(Marker);
Log.d(TAG, "onMapReady: Zoom on top My Location");
MyMap.animateCamera(CameraUpdateFactory
.newLatLngZoom(MylatLng,ZOOMING_DEFAULT));
//disable the compass(might creat my own later or come back to change the position)
MyMap.getUiSettings().setCompassEnabled(false);
//disable direction and show it in google map
MyMap.getUiSettings().setMapToolbarEnabled(false);
MyMap.getUiSettings().setZoomControlsEnabled(true);
}
});
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
Log.d(TAG, "onRequestPermissionsResult: called");
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
MyLocationPermissionsGranted = false;
switch (requestCode){
case LOCATION_PERMISSION_REQUEST_CODE:{
if (grantResults.length > 0 ){
for (int i = 0; i < grantResults.length; i++) {
if (grantResults[i] == PackageManager.PERMISSION_GRANTED){
MyLocationPermissionsGranted=false;
Log.d(TAG, "onRequestPermissionsResult: permission failed");
return;
}
}
Log.d(TAG, "onRequestPermissionsResult: permission granted");
MyLocationPermissionsGranted=true;
//initialize map
getCurrentLocation();
}
}
}
}
@SuppressLint("SetTextI18n")
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.d(TAG, "onActivityResult: currently at onActivityResult");
if (requestCode == AUTOCOMPLETE_REQUEST_CODE) {
Log.d(TAG, "onActivityResult: Correct Request Code");
if (resultCode == AutocompleteActivity.RESULT_OK) {
Log.d(TAG, "onActivityResult: successfully Obtaining Places");
AutocompletedPlaces = Autocomplete.getPlaceFromIntent(data);
Log.i(TAG, "Place: "
+ AutocompletedPlaces.getName() + ", "
+ AutocompletedPlaces.getId());
SearchedLocationlatLng = AutocompletedPlaces.getLatLng();
SearchedlocationAddress = AutocompletedPlaces.getAddress();
SearchedlocationName = AutocompletedPlaces.getName();
editTextsearchlocation.setText(SearchedlocationAddress);
moveCamera(SearchedLocationlatLng,ZOOMING_DEFAULT,SearchedlocationName,SearchedlocationAddress);
} else if (resultCode == AutocompleteActivity.RESULT_ERROR) {
Log.d(TAG, "onActivityResult: Failed To Obtaining Places");
Status status = Autocomplete.getStatusFromIntent(data);
Log.i(TAG, status.getStatusMessage());
} else if (resultCode == RESULT_CANCELED) {
// The user canceled the operation.
}
}
}
private void moveCamera(LatLng latLng, float zoom, String title,String subtitle){
Log.d(TAG, "moveCamera: moving the camera to : Latitude:" + latLng.latitude + ", Longitude: " +latLng.longitude);
MyMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,zoom));
//dont drop a pin on my location
if (!title.equals("My Location")){
//code below drop a pin on the map when camera moved
MarkerOptions markerOptions = new MarkerOptions().position(latLng).title(title).snippet(subtitle);
MyMap.addMarker(markerOptions);
}
}
@Override
public void onBackPressed() {
// super.onBackPressed();
//allow back condition
if (false) {
super.onBackPressed();
}
//no back is allowed
else {
}
// finish();
}
}