places.getLatLng() 返回 null 虽然 places.getName() 没有返回 null

Posted 2023-04-14

【中文标题】places.getLatLng() 返回 null 虽然 places.getName() 没有返回 null

【英文标题】：places.getLatLng() returning null though places.getName() is not returning null

【发布时间】：2019-08-21 00:36:14

【问题描述】：

我一直在尝试从自动完成中单击一个位置后获取 latlng，但奇怪的是 places.getName() 工作正常，但 place.getLatLng() 返回 null。我应该怎么做才能解决这个问题我是谷歌地图和地点 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地点的纬度和对数

【问题讨论】：

确保您已启用位置设置

位置设置已启用

【参考方案1】：

以前，Places SDK for android 是通过 Google Play 服务提供的。 Places SDK for Android 的 Google Play 服务版本已弃用，Google 将在 2019 年 7 月 29 日之前将其关闭。

但是，新版 Places SDK for Android 是作为静态客户端库分发的。 新 SDK 客户端库的依赖项

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

您可以使用以下两种方式之一在 android 应用程序中添加 Google 地方自动完成功能：

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

我通过在下面嵌入 AutocompleteSupportFragment 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);
        
    );

指定要返回的地点数据的类型也很重要

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

【讨论】：

谢谢我没有提到 Place.Field.LAT_LNG，非常感谢您的帮助！你是救星

【参考方案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。

此功能会自动完成

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：

这里我请求了三个东西Place.Field.LAT_LNG,Place.Field.ID,Place.Field.NAME