android-Google Places API自动完成获取城市列表

概述我正在我的Android应用程序上实现google的位置自动填充功能,并且该功能可以显示每个相似的位置,但是只有当用户尝试搜索任何内容时,我如何才能获得城市建议.我搜索了很多我找不到Android地方自动完成的类似问题.我已经从Google的示例中实现了PlaceAutocompleteAdapter,这看起来像

我正在我的Android应用程序上实现Google的位置自动填充功能,并且该功能可以显示每个相似的位置,但是只有当用户尝试搜索任何内容时,我如何才能获得城市建议.

我搜索了很多我找不到AndroID地方自动完成的类似问题.

我已经从Google的示例中实现了PlaceautocompleteAdapter,这看起来像

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,所以如果您发现任何错误,请指出.那将是很大的帮助.
谢谢！

解决方法:

您可以使用Google的地方自动填充功能

Step 1:-

在Google Developers帐户中添加一个项目,然后从那里获取密钥
https://console.developers.google.com/flows/enableapi?apiid=appsactivity&credential=client_key&pli=1

范例程式码

Step 2:-

添加gradle

 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'

Step 3:-

在清单文件中添加此标签

<Meta-data androID:name="com.Google.androID.geo.API_KEY" androID:value="Your API key"/>

Step 4:-

现在像这样用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;

然后最后在按钮上单击调用此

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();                }

这是您要寻找的过滤器

autocompleteFilter.TYPE_FILTER_CITIES

然后在覆盖方法中获取所选值

 @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

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