Android
API Android Places

Inserisci esempio di utilizzo del selettore

Place Picker è un widget UI davvero semplice fornito da Places API. Fornisce una mappa integrata, posizione corrente, luoghi vicini, capacità di ricerca e completamento automatico.

Questo è un esempio di utilizzo del widget dell'interfaccia utente di Selettore dei luoghi.

private static int PLACE_PICKER_REQUEST = 1;

private TextView txtPlaceName;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_place_picker_sample);

    txtPlaceName = (TextView) this.findViewById(R.id.txtPlaceName);
    Button btnSelectPlace = (Button) this.findViewById(R.id.btnSelectPlace);
    btnSelectPlace.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            openPlacePickerView();
        }
    });

}

private void openPlacePickerView(){
    PlacePicker.IntentBuilder builder = new PlacePicker.IntentBuilder();
    try {
        startActivityForResult(builder.build(this), PLACE_PICKER_REQUEST);
    } catch (GooglePlayServicesRepairableException e) {
        e.printStackTrace();
    } catch (GooglePlayServicesNotAvailableException e) {
        e.printStackTrace();
    }
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == PLACE_PICKER_REQUEST) {
        if (resultCode == RESULT_OK) {
            Place place = PlacePicker.getPlace(this, data);
            Log.i(LOG_TAG, String.format("Place Name : %s", place.getName()));
            Log.i(LOG_TAG, String.format("Place Address : %s", place.getAddress()));
            Log.i(LOG_TAG, String.format("Place Id : %s", place.getId()));

            txtPlaceName.setText(String.format("Place : %s - %s" , place.getName() , place.getAddress()));
        }
    }
}

Ottenere luoghi attuali utilizzando l'API di Places

Puoi ottenere la posizione corrente e i luoghi locali dell'utente utilizzando l' API di Google Places .

Per prima cosa, dovresti chiamare il metodo PlaceDetectionApi.getCurrentPlace() per recuperare attività commerciali locali o altri luoghi. Questo metodo restituisce un oggetto PlaceLikelihoodBuffer che contiene un elenco di oggetti PlaceLikelihood . Quindi, puoi ottenere un oggetto Place chiamando il metodo PlaceLikelihood.getPlace() .

Importante: devi richiedere e ottenere l'autorizzazione ACCESS_FINE_LOCATION per consentire alla tua app di accedere a informazioni precise sulla posizione.

private static final int PERMISSION_REQUEST_TO_ACCESS_LOCATION = 1;

private TextView txtLocation;
private GoogleApiClient googleApiClient;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_location);

    txtLocation = (TextView) this.findViewById(R.id.txtLocation);
    googleApiClient = new GoogleApiClient.Builder(this)
            .addApi(Places.GEO_DATA_API)
            .addApi(Places.PLACE_DETECTION_API)
            .enableAutoManage(this, this)
            .build();

    getCurrentLocation();
}

private void getCurrentLocation() {
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        Log.e(LOG_TAG, "Permission is not granted");

        ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.ACCESS_FINE_LOCATION},PERMISSION_REQUEST_TO_ACCESS_LOCATION);
        return;
    }

    Log.i(LOG_TAG, "Permission is granted");
    
    PendingResult<PlaceLikelihoodBuffer> result = Places.PlaceDetectionApi.getCurrentPlace(googleApiClient, null);
    result.setResultCallback(new ResultCallback<PlaceLikelihoodBuffer>() {
        @Override
        public void onResult(PlaceLikelihoodBuffer likelyPlaces) {
            Log.i(LOG_TAG, String.format("Result received : %d " , likelyPlaces.getCount() ));
            StringBuilder stringBuilder = new StringBuilder();

            for (PlaceLikelihood placeLikelihood : likelyPlaces) {
                stringBuilder.append(String.format("Place : '%s' %n",
                        placeLikelihood.getPlace().getName()));
            }
            likelyPlaces.release();
            txtLocation.setText(stringBuilder.toString());
        }
    });
}

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {
        case PERMISSION_REQUEST_TO_ACCESS_LOCATION: {
            // If the request is cancelled, the result arrays are empty.
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                getCurrentLocation();
            } else {
                // Permission denied, boo!
                // Disable the functionality that depends on this permission.
            }
            return;
        }

        // Add further 'case' lines to check for other permissions this app might request.
    }
}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
    Log.e(LOG_TAG, "GoogleApiClient connection failed: " + connectionResult.getErrorMessage());
}

Inserire l'integrazione del completamento automatico

La funzione di completamento automatico dell'API di Google Places per Android fornisce le previsioni dei luoghi all'utente. Mentre l'utente digita nella casella di ricerca, il completamento automatico mostra i posti in base alle query dell'utente.

AutoCompleteActivity.java

private TextView txtSelectedPlaceName;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_autocomplete);

    txtSelectedPlaceName = (TextView) this.findViewById(R.id.txtSelectedPlaceName);

    PlaceAutocompleteFragment autocompleteFragment = (PlaceAutocompleteFragment)
            getFragmentManager().findFragmentById(R.id.fragment_autocomplete);

    autocompleteFragment.setOnPlaceSelectedListener(new PlaceSelectionListener() {
        @Override
        public void onPlaceSelected(Place place) {
            Log.i(LOG_TAG, "Place: " + place.getName());
            txtSelectedPlaceName.setText(String.format("Selected places : %s  - %s" , place.getName(), place.getAddress()));
        }

        @Override
        public void onError(Status status) {
            Log.i(LOG_TAG, "An error occurred: " + status);
            Toast.makeText(AutoCompleteActivity.this, "Place cannot be selected!!", Toast.LENGTH_SHORT).show();
        }
    });

}

}

activity_autocomplete.xml

<fragment
    android:id="@+id/fragment_autocomplete"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:name="com.google.android.gms.location.places.ui.PlaceAutocompleteFragment"
    />



<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/txtSelectedPlaceName"
    android:layout_margin="20dp"
    android:padding="15dp"
    android:hint="@string/txt_select_place_hint"
    android:textSize="@dimen/place_autocomplete_prediction_primary_text"/>

Aggiunta di più di un'attività completa automatica di Google.

 public static final int PLACE_AUTOCOMPLETE_FROM_PLACE_REQUEST_CODE=1;
   public static final int PLACE_AUTOCOMPLETE_TO_PLACE_REQUEST_CODE=2;

fromPlaceEdit.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    try {
                      //Do your stuff from place
                        startActivityForResult(intent, PLACE_AUTOCOMPLETE_FROM_PLACE_REQUEST_CODE);

                    } catch (GooglePlayServicesRepairableException e) {
                        // TODO: Handle the error.
                    } catch (GooglePlayServicesNotAvailableException e) {
                        // TODO: Handle the error.
                    }
                }
            });
toPlaceEdit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                try {
                   //Do your stuff to place
                    startActivityForResult(intent, PLACE_AUTOCOMPLETE_TO_PLACE_REQUEST_CODE);

                } catch (GooglePlayServicesRepairableException e) {
                    // TODO: Handle the error.
                } catch (GooglePlayServicesNotAvailableException e) {
                    // TODO: Handle the error.
                }
            }
        });
@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       if (requestCode == PLACE_AUTOCOMPLETE_FROM_PLACE_REQUEST_CODE) {
           if (resultCode == RESULT_OK) {
              //Do your ok >from place< stuff here
           } else if (resultCode == PlaceAutocomplete.RESULT_ERROR) {
              //Handle your error >from place<
           } else if (resultCode == RESULT_CANCELED) {
               // The user canceled the operation.
           }
       } else if (requestCode == PLACE_AUTOCOMPLETE_TO_PLACE_REQUEST_CODE) {
           if (resultCode == RESULT_OK) {
              //Do your ok >to place< stuff here
           } else if (resultCode == PlaceAutocomplete.RESULT_ERROR) {
              //Handle your error >to place<
           } else if (resultCode == RESULT_CANCELED) {
               // The user canceled the operation.
           }
        }
    }

Impostazione dei filtri dei tipi di luogo per PlaceAutocomplete

In alcuni scenari, potremmo voler restringere i risultati mostrati da PlaceAutocomplete a un paese specifico o magari mostrare solo regioni. Questo può essere ottenuto impostando un filtro di completamento automatico sull'intento. Ad esempio, se voglio cercare solo i luoghi di tipo REGION e solo appartenenti all'India, farei quanto segue:

MainActivity.java

public class MainActivity extends AppComatActivity {
    
    private static final int PLACE_AUTOCOMPLETE_REQUEST_CODE = 1;
    private TextView selectedPlace;
    
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        selectedPlace = (TextView) findViewById(R.id.selected_place);
        try {
            AutocompleteFilter typeFilter = new AutocompleteFilter.Builder()
                    .setTypeFilter(AutocompleteFilter.TYPE_FILTER_REGIONS)
                    .setCountry("IN")
                    .build();

            Intent intent =
                    new PlaceAutocomplete.IntentBuilder(PlaceAutocomplete.MODE_FULLSCREEN)
                            .setFilter(typeFilter)
                            .build(this);
            startActivityForResult(intent, PLACE_AUTOCOMPLETE_REQUEST_CODE);

        } catch (GooglePlayServicesRepairableException
                | GooglePlayServicesNotAvailableException e) {
            e.printStackTrace();
        }
}

protected void onActivityResult(int requestCode,
                                int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == PLACE_AUTOCOMPLETE_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
        final Place place = PlacePicker.getPlace(this, data);
        selectedPlace.setText(place.getName().toString().toUpperCase());
    } else {
        Toast.makeText(MainActivity.this, "Could not get location.", Toast.LENGTH_SHORT).show();
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:orientation="vertical"
          android:layout_width="match_parent"
          android:layout_height="match_parent">

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/selected_place"/>

</LinearLayout>

PlaceAutocomplete si avvierà automaticamente e potrai quindi selezionare un luogo dai risultati che saranno solo del tipo REGION e apparterranno solo al paese specificato. L'intento può anche essere lanciato con un clic di un pulsante.