Google Places API Autocomplete 仅获取城市列表

Posted 2023-05-06

【中文标题】Google Places API Autocomplete 仅获取城市列表

【英文标题】：Google Places API Autocomplete get cities List only

【发布时间】：2019-01-27 04:08:05

【问题描述】：

我正在我的 android 应用程序上实现 google 的地点自动完成功能，它可以显示每个类似的地点，但是只有当用户尝试搜索任何内容时，我才能获得城市建议。

我进行了很多搜索，但无法找到 Android 位置自动填充的类似问题。

我已经从谷歌的例子中实现了 PlaceAutocompleteAdapter，它看起来像这样

PlaceAutocompleteAdapter

package com.tribikram.smartcitytraveler;

import android.content.Context;
import android.graphics.Typeface;
import android.text.style.CharacterStyle;
import android.text.style.StyleSpan;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.common.data.DataBufferUtils;
import com.google.android.gms.location.places.AutocompleteFilter;
import com.google.android.gms.location.places.AutocompletePrediction;
import com.google.android.gms.location.places.AutocompletePredictionBufferResponse;
import com.google.android.gms.location.places.GeoDataClient;
import com.google.android.gms.maps.model.LatLngBounds;
import com.google.android.gms.tasks.RuntimeExecutionException;
import com.google.android.gms.tasks.Task;
import com.google.android.gms.tasks.Tasks;

import java.util.ArrayList;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * Adapter that handles Autocomplete requests from the Places Geo Data Client.
 * @link AutocompletePrediction results from the API are frozen and stored directly in this
 * adapter. (See @link AutocompletePrediction#freeze().)
 */
public class PlaceAutocompleteAdapter
        extends ArrayAdapter<AutocompletePrediction> implements Filterable 

    private static final String TAG = "PlaceACA";
    private static final CharacterStyle STYLE_BOLD = new StyleSpan(Typeface.BOLD);
    /**
     * Current results returned by this adapter.
     */
    private ArrayList<AutocompletePrediction> mResultList;

    /**
     * Handles autocomplete requests.
     */
    private GeoDataClient mGeoDataClient;

    /**
     * The bounds used for Places Geo Data autocomplete API requests.
     */
    private LatLngBounds mBounds;

    /**
     * The autocomplete filter used to restrict queries to a specific set of place types.
     */
    private AutocompleteFilter mPlaceFilter;

    /**
     * Initializes with a resource for text rows and autocomplete query bounds.
     *
     * @see android.widget.ArrayAdapter#ArrayAdapter(android.content.Context, int)
     */
    public PlaceAutocompleteAdapter(Context context, GeoDataClient geoDataClient,
                                    LatLngBounds bounds, AutocompleteFilter filter) 
        super(context, android.R.layout.simple_expandable_list_item_2, android.R.id.text1);
        mGeoDataClient = geoDataClient;
        mBounds = bounds;
        mPlaceFilter = filter;
    

    /**
     * Sets the bounds for all subsequent queries.
     */
    public void setBounds(LatLngBounds bounds) 
        mBounds = bounds;
    

    /**
     * Returns the number of results received in the last autocomplete query.
     */
    @Override
    public int getCount() 
        return mResultList.size();
    

    /**
     * Returns an item from the last autocomplete query.
     */
    @Override
    public AutocompletePrediction getItem(int position) 
        return mResultList.get(position);
    

    @Override
    public View getView(int position, View convertView, ViewGroup parent) 
        View row = super.getView(position, convertView, parent);

        // Sets the primary and secondary text for a row.
        // Note that getPrimaryText() and getSecondaryText() return a CharSequence that may contain
        // styling based on the given CharacterStyle.

        AutocompletePrediction item = getItem(position);

        TextView textView1 = (TextView) row.findViewById(android.R.id.text1);
        TextView textView2 = (TextView) row.findViewById(android.R.id.text2);
        textView1.setText(item.getPrimaryText(STYLE_BOLD));
        textView2.setText(item.getSecondaryText(STYLE_BOLD));

        return row;
    

    /**
     * Returns the filter for the current set of autocomplete results.
     */
    @Override
    public Filter getFilter() 
        return new Filter() 
            @Override
            protected FilterResults performFiltering(CharSequence constraint) 
                FilterResults results = new FilterResults();

                // We need a separate list to store the results, since
                // this is run asynchronously.
                ArrayList<AutocompletePrediction> filterData = new ArrayList<>();

                // Skip the autocomplete query if no constraints are given.
                if (constraint != null) 
                    // Query the autocomplete API for the (constraint) search string.
                    filterData = getAutocomplete(constraint);
                

                results.values = filterData;
                if (filterData != null) 
                    results.count = filterData.size();
                 else 
                    results.count = 0;
                

                return results;
            

            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) 

                if (results != null && results.count > 0) 
                    // The API returned at least one result, update the data.
                    mResultList = (ArrayList<AutocompletePrediction>) results.values;
                    notifyDataSetChanged();
                 else 
                    // The API did not return any results, invalidate the data set.
                    notifyDataSetInvalidated();
                
            

            @Override
            public CharSequence convertResultToString(Object resultValue) 
                // Override this method to display a readable result in the AutocompleteTextView
                // when clicked.
                if (resultValue instanceof AutocompletePrediction) 
                    return ((AutocompletePrediction) resultValue).getFullText(null);
                 else 
                    return super.convertResultToString(resultValue);
                
            
        ;
    

    /**
     * Submits an autocomplete query to the Places Geo Data Autocomplete API.
     * Results are returned as frozen AutocompletePrediction objects, ready to be cached.
     * Returns an empty list if no results were found.
     * Returns null if the API client is not available or the query did not complete
     * successfully.
     * This method MUST be called off the main UI thread, as it will block until data is returned
     * from the API, which may include a network request.
     *
     * @param constraint Autocomplete query string
     * @return Results from the autocomplete API or null if the query was not successful.
     * @see GeoDataClient#getAutocompletePredictions(String, LatLngBounds, AutocompleteFilter)
     * @see AutocompletePrediction#freeze()
     */
    private ArrayList<AutocompletePrediction> getAutocomplete(CharSequence constraint) 
        Log.i(TAG, "Starting autocomplete query for: " + constraint);

        // Submit the query to the autocomplete API and retrieve a PendingResult that will
        // contain the results when the query completes.
        Task<AutocompletePredictionBufferResponse> results =
                mGeoDataClient.getAutocompletePredictions(constraint.toString(), mBounds,
                        mPlaceFilter);

        // This method should have been called off the main UI thread. Block and wait for at most
        // 60s for a result from the API.
        try 
            Tasks.await(results, 60, TimeUnit.SECONDS);
         catch (ExecutionException | InterruptedException | TimeoutException e) 
            e.printStackTrace();
        

        try 
            AutocompletePredictionBufferResponse autocompletePredictions = results.getResult();

            Log.i(TAG, "Query completed. Received " + autocompletePredictions.getCount()
                    + " predictions.");

            // Freeze the results immutable representation that can be stored safely.
            return DataBufferUtils.freezeAndClose(autocompletePredictions);
         catch (RuntimeExecutionException e) 
            // If the query did not complete successfully return null
            Toast.makeText(getContext(), "Error contacting API: " + e.toString(),
                    Toast.LENGTH_SHORT).show();
            Log.e(TAG, "Error getting autocomplete prediction API call", e);
            return null;
        
    

我是初学者，如果发现有任何错误，请指出。那将是很大的帮助。 谢谢！

【参考方案1】：

您可以使用 google 的 Place Autocomplete

第 1 步：-

在谷歌开发者帐户中添加一个项目并从那里获取密钥 https://console.developers.google.com/flows/enableapi?apiid=appsactivity&credential=client_key&pli=1

示例代码

第 2 步：-

添加分级

 implementation 'com.google.android.gms:play-services-places:9.6.0'

或最新版本

implementation 'com.google.android.gms:play-services-places:latest_version'

第 3 步：-

在清单文件中添加这个标签

<meta-data android:name="com.google.android.geo.API_KEY" android:value="Your api key"/>

第四步：-

现在像这样使用PlaceSelectionListener 实现您的片段或活动类

public class Fragment_Profile extends Fragment implements View.OnClickListener, PlaceSelectionListener

声明这个变量

private static final int REQUEST_SELECT_PLACE = 1000;

然后最后点击按钮调用这个

try 
                    AutocompleteFilter typeFilter = new AutocompleteFilter.Builder()
                            .setTypeFilter(AutocompleteFilter.TYPE_FILTER_CITIES)
                            .build();
                    Intent intent = new PlaceAutocomplete.IntentBuilder
                            (PlaceAutocomplete.MODE_FULLSCREEN)
                            .setFilter(typeFilter)
                            .build(getActivity());
                    startActivityForResult(intent, REQUEST_SELECT_PLACE);
                 catch (GooglePlayServicesRepairableException |
                        GooglePlayServicesNotAvailableException e) 
                    e.printStackTrace();
                

这是您正在寻找的过滤器

AutocompleteFilter.TYPE_FILTER_CITIES

然后在被覆盖的方法中获取选中的值

 @Override
    public void onPlaceSelected(Place place) 
        Log.i("Selected", "Place Selected: " + place.getAddress());

    

您可以从这里查看文档 https://developers.google.com/places/android-sdk/autocomplete 和 http://codesfor.in/android-places-autocomplete-example/

谢谢

【讨论】：

谢谢你的回答，我回家时会实施。顺便说一句，谷歌不建议使用com.google.android.gms:play-services-places 对吧？

感谢它的工作:) 你是伟大的兄弟。很抱歉我之前的评论谷歌确实建议使用com.google.android.gms:play-services-places

我真的为你感到高兴，亲爱的，这很酷，不用担心，如果你只是说我从来没有遇到过任何问题，我认为这不会是一个问题 :)

感谢您和 +1 的精彩回答。

感谢 @SaWin 兄弟，感谢您的支持，干杯 :)

【参考方案2】：

Intent intent = new Autocomplete.IntentBuilder(AutocompleteActivityMode.FULLSCREEN, fields)
                        .setTypeFilter(TypeFilter.ADDRESS)
                        .setTypeFilter(TypeFilter.CITIES)
                        .setCountry("IN")
                        .build(SelectDistanceActivity.this);
                startActivityForResult(intent, Constant.AUTOCOMPLETE_REQUEST_CODE);

//if you want to get city for specific country then use this line

//setCountry("IN")

【讨论】：

请提供更多详细信息

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