Question

我一直在尝试从自动完成功能中点击某个位置后得到latlng，奇怪的是places.getName()工作正常，但是place.getLatLng()返回null。我应该怎么做才能解决这个问题？我是google maps and place API的新手！

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == AUTOCOMPLETE_REQUEST_CODE_FROM) {
            if (resultCode == RESULT_OK) {
                Place place = Autocomplete.getPlaceFromIntent(data);
                Log.i("shipadd", "Place: " + place.getName() + ", " + place.getId());
                from_edit_txt.setText(place.getName());
                origin=place.getLatLng();
                Log.e("origin_destarray",""+place.getLatLng());

            } else if (resultCode == AutocompleteActivity.RESULT_ERROR) {
                // TODO: Handle the error.
                Status status = Autocomplete.getStatusFromIntent(data);
                Log.i("shipadd", status.getStatusMessage());
            } else if (resultCode == RESULT_CANCELED) {
                // The user canceled the operation.
            }
        }
        else if (requestCode == AUTOCOMPLETE_REQUEST_CODE_TO) {
            if (resultCode == RESULT_OK) {
                Place place = Autocomplete.getPlaceFromIntent(data);
                Log.i("shipadd", "Place: " + place.getAddress() + ", " + place.getId());
                to_edit_txt.setText(place.getName());

我希望以下代码返回我在自动完成活动中选择的位置的纬度和对数

Answer 1

以前，可通过Google Play服务使用Android的Places SDK。 已弃用Android版Places SDK的Google Play服务版本，Google将于2019年7月29日将其关闭。

但是，用于Android的Places SDK的新版本作为静态客户端库分发。
新的SDK客户端库的依赖项

implementation 'com.google.android.libraries.places:places:1.0.0'

您可以使用在Android应用程序中添加Google地方自动填充功能的两种方法之一：

 1) Either embed a AutocompleteSupportFragment
 OR
 2) Use an intent to launch the autocomplete activity.

我通过嵌入以下自动完成支持片段创建了一个演示应用程序：-

package com.places_api_demo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import java.util.Arrays;

import com.google.android.gms.common.api.Status;
import com.google.android.libraries.places.api.model.Place;
import com.google.android.libraries.places.api.net.PlacesClient;
import com.google.android.libraries.places.widget.AutocompleteSupportFragment;
import com.google.android.libraries.places.widget.listener.PlaceSelectionListener;
import com.google.android.libraries.places.api.Places;
import static com.google.android.libraries.places.api.model.Place.Field.LAT_LNG;


public class MainActivity extends AppCompatActivity {
String TAG = "placeautocomplete";
TextView txtView;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    txtView = findViewById(R.id.txtView);

    // Initialize Places.
    Places.initialize(getApplicationContext(), "REPLACE YOUR API KEY HERE");
    // Create a new Places client instance.
    PlacesClient placesClient = Places.createClient(this);

    // Initialize the AutocompleteSupportFragment.
    AutocompleteSupportFragment autocompleteFragment = (AutocompleteSupportFragment)
            getSupportFragmentManager().findFragmentById(R.id.autocomplete_fragment);

    // Specify the types of place data to return.
    autocompleteFragment.setPlaceFields(Arrays.asList(Place.Field.ID, Place.Field.NAME, Place.Field.LAT_LNG));

    // Set up a PlaceSelectionListener to handle the response.
    autocompleteFragment.setOnPlaceSelectedListener(new PlaceSelectionListener() {
        @Override
        public void onPlaceSelected(Place place) {
            // TODO: Get info about the selected place.
            txtView.setText(place.getName()+"\n"+place.getId()+"\n"+ place.getLatLng());
            Log.i(TAG, "Place: " + place.getName() + ", " +  place.getLatLng());
        }

        @Override
        public void onError(Status status) {
            // TODO: Handle the error.
            Log.i(TAG, "An error occurred: " + status);
        }
    });
}
}

同样重要的是指定要返回的位置数据的类型

autocompleteFragment.setPlaceFields(Arrays.asList(Place.Field.LAT_LNG, Place.Field.ID, Place.Field.NAME));

For more details related to Place Data fields please refer here

Answer 2

我遇到了同样的问题，最后我知道我们需要请求 Place.Field.LAT_LNG。

此功能将开启自动完成

private void openGetLocation() {

    // Set the fields to specify which types of place data to
    // return after the user has made a selection.
    List<Place.Field> fields = Arrays.asList(Place.Field.LAT_LNG,Place.Field.ID, Place.Field.NAME);

    // Start the autocomplete intent.
    Intent intent = new Autocomplete.IntentBuilder(AutocompleteActivityMode.OVERLAY, fields)
            .build(this);
    startActivityForResult(intent, AUTOCOMPLETE_REQUEST_CODE);
}

在此处获取地点详情onActivityResult

 @Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK && requestCode == 1) {
        Toast.makeText(this, data.toString(), Toast.LENGTH_SHORT).show();
        Place place = Autocomplete.getPlaceFromIntent(data);
        locationEd.setText(place.getLatLng().toString());
    } else if (resultCode == AutocompleteActivity.RESULT_ERROR) {
        Status status = Autocomplete.getStatusFromIntent(data);
        Toast.makeText(this, status.getStatusMessage(), Toast.LENGTH_SHORT).show();
    }
}

注意：

这里我请求了三件事 Place.Field.LAT_LNG ,Place.Field.ID, Place.Field.NAME

尽管places.getName（）没有返回空值，但是places.getLatLng（）返回的空值

2 个答案: