Как внедрить автозаполнение в Google программно

Question

Предсказания автозаполнения не отображаются в моем приложении MapsActivity, когда я набираю текст в AutoCompleteTextView (mSearchText).

Я попытался выполнить руководство по следующей ссылке: https://www.youtube.com/watch?v=6Trdd9EnmqY&list=PLgCYzUzKIBE-vInwQhGSdnbyJ62nixHCt&index=8. Некоторые методы, использованные в немНедавно он устарел, поэтому я проверил документацию по https://developers.google.com/places/android-sdk/autocomplete,, в частности «Программно получать прогнозы мест» и «Миграция в SDK-клиент New Places».Я также следовал руководству от того же парня, чтобы настроить мой ключ API, и я думаю, что здесь не должно быть проблем.Это мое первое приложение для Android и мой первый вопрос на этом сайте, поэтому, пожалуйста, будьте терпеливы со мной.

    Places.initialize(getApplicationContext(), getString(R.string.google_maps_API_key));
    PlacesClient placesClient = Places.createClient(this);

    FindAutocompletePredictionsRequest request = FindAutocompletePredictionsRequest.builder()
            .setLocationBias(RECTANGULAR_BOUNDS)
            .setQuery(mSearchText.getText().toString())
            .build();

    placesClient.findAutocompletePredictions(request).addOnSuccessListener((response) -> {
        for (AutocompletePrediction prediction : response.getAutocompletePredictions()) {
            Log.i(TAG, prediction.getPlaceId());
            Log.i(TAG, prediction.getPrimaryText(null).toString());
        }
    }).addOnFailureListener((exception) -> {
        if (exception instanceof ApiException) {
            ApiException apiException = (ApiException) exception;
            Log.e(TAG, "Place not found: " + apiException.getStatusCode());
        }
    });

Прогнозы автозаполнения должны отображаться как пользовательские типы в строке поиска, но этого не происходит,Я не получаю никаких журналов от слушателей.

Answer 1

public class PlaceArrayAdapter extends ArrayAdapter<PlaceArrayAdapter.PlaceAutocomplete> implements Filterable {

    private static final String TAG = "PlaceArrayAdapter";
    private final PlacesClient placesClient;
    private RectangularBounds mBounds;
    private ArrayList<PlaceAutocomplete> mResultList = new ArrayList<>();
    public Context context;

    /**
     * Constructor
     *
     * @param context  Context
     * @param resource Layout resource
     * @param bounds   Used to specify the search bounds
     * @param filter   Used to specify place types
     */
    public PlaceArrayAdapter(Context context, int resource, RectangularBounds bounds) {
        super(context, resource);
        this.context = context;
        mBounds = bounds;
        placesClient = com.google.android.libraries.places.api.Places.createClient(context);
    }


    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        View view = super.getView(position, convertView, parent);
        TypefaceHelper.typeface(view);
        return view;
    }

    @Override
    public int getCount() {
        if (mResultList == null)
            return 0;
        else
            return mResultList.size();
    }

    @Override
    public PlaceAutocomplete getItem(int position) {
        return mResultList.get(position);
    }

    private ArrayList<PlaceAutocomplete> getPredictions(CharSequence constraint) {

        final ArrayList<PlaceAutocomplete> resultList = new ArrayList<>();

        // Create a new token for the autocomplete session. Pass this to FindAutocompletePredictionsRequest,
        // and once again when the user makes a selection (for example when calling fetchPlace()).
        AutocompleteSessionToken token = AutocompleteSessionToken.newInstance();


        // Use the builder to create a FindAutocompletePredictionsRequest.
        FindAutocompletePredictionsRequest request = FindAutocompletePredictionsRequest.builder()
                // Call either setLocationBias() OR setLocationRestriction().
                // .setLocationBias(bounds)
                .setLocationBias(mBounds)
                //.setCountry("au")
                //   .setTypeFilter(TypeFilter.ADDRESS)
                .setSessionToken(token)
                .setQuery(constraint.toString())
                .build();

        Task<FindAutocompletePredictionsResponse> autocompletePredictions = placesClient.findAutocompletePredictions(request);

        // 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(autocompletePredictions, 60, TimeUnit.SECONDS);
        } catch (ExecutionException | InterruptedException | TimeoutException e) {
            e.printStackTrace();
        }

        if (autocompletePredictions.isSuccessful()) {
            FindAutocompletePredictionsResponse findAutocompletePredictionsResponse = autocompletePredictions.getResult();
            if (findAutocompletePredictionsResponse != null)
                for (com.google.android.libraries.places.api.model.AutocompletePrediction prediction : findAutocompletePredictionsResponse.getAutocompletePredictions()) {
                    Log.i(TAG, prediction.getPlaceId());
                    Log.i(TAG, prediction.getPrimaryText(null).toString());

                    resultList.add(new PlaceAutocomplete(prediction.getPlaceId(), prediction.getFullText(null).toString()));

                }

            return resultList;
        } else {
            return resultList;
        }

    }

    @Override
    public Filter getFilter() {
        Filter filter = new Filter() {
            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                FilterResults results = new FilterResults();
                if (constraint != null) {
                    // Query the autocomplete API for the entered constraint
                    Log.d(TAG, "Before Prediction");
                    mResultList = getPredictions(constraint);
                    Log.d(TAG, "After Prediction");
                    if (mResultList != null) {
                        // Results
                        results.values = mResultList;
                        results.count = mResultList.size();
                    }
                }
                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.
                    notifyDataSetChanged();
                } else {
                    // The API did not return any results, invalidate the data set.
                    notifyDataSetInvalidated();
                }
            }
        };
        return filter;
    }

    public class PlaceAutocomplete {

        public CharSequence placeId;
        public CharSequence description;

        PlaceAutocomplete(CharSequence placeId, CharSequence description) {
            this.placeId = placeId;
            this.description = description;
        }

        @Override
        public String toString() {
            return description.toString();
        }
    }
}


/* Now call adapter from activity */

 autoCompleteTextView = findViewById(R.id.autoCompleteTextView);
 autoCompleteTextView.setThreshold(3);

 //autoCompleteTextView.setOnItemClickListener(mAutocompleteClickListener);

mPlaceArrayAdapter = new PlaceArrayAdapter(this, R.layout.adapter_place_array, CURRENT_LOCATION_BONDS);

Answer 2

Новая версия 2019

build.gradle (Модуль: приложение)

implementation 'com.google.android.gms:play-services-maps:17.0.0'
implementation 'com.google.android.gms:play-services-location:17.0.0'
implementation 'com.google.android.gms:play-services-places:17.0.0'
implementation 'com.google.android.libraries.places:places:1.1.0'

Схема действий

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:padding="15dp"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity.MapsActivity">
    <EditText
        android:id="@+id/place_search"
        android:hint="Search"
        android:inputType="textPostalAddress"
        android:padding="15dp"
        android:layout_marginBottom="15dp"
        android:drawableLeft="@drawable/places_ic_search"
        android:background="@drawable/edit_text_border"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/places_recycler_view"
        android:background="#FFF"
        android:orientation="vertical"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </androidx.recyclerview.widget.RecyclerView>
</LinearLayout>

Активность

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.libraries.places.api.Places;
import com.google.android.libraries.places.api.model.Place;
import com.zaaibo.drive.R;
import com.zaaibo.drive.adapter.PlacesAutoCompleteAdapter;

public class MapsActivity extends AppCompatActivity implements PlacesAutoCompleteAdapter.ClickListener{

    private PlacesAutoCompleteAdapter mAutoCompleteAdapter;
    private RecyclerView recyclerView;

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

        Places.initialize(this, getResources().getString(R.string.google_maps_key));

        recyclerView = (RecyclerView) findViewById(R.id.places_recycler_view);
        ((EditText) findViewById(R.id.place_search)).addTextChangedListener(filterTextWatcher);

        mAutoCompleteAdapter = new PlacesAutoCompleteAdapter(this);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        mAutoCompleteAdapter.setClickListener(this);
        recyclerView.setAdapter(mAutoCompleteAdapter);
        mAutoCompleteAdapter.notifyDataSetChanged();
    }

    private TextWatcher filterTextWatcher = new TextWatcher() {
        public void afterTextChanged(Editable s) {
            if (!s.toString().equals("")) {
                mAutoCompleteAdapter.getFilter().filter(s.toString());
                if (recyclerView.getVisibility() == View.GONE) {recyclerView.setVisibility(View.VISIBLE);}
            } else {
                if (recyclerView.getVisibility() == View.VISIBLE) {recyclerView.setVisibility(View.GONE);}
            }
        }
        public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
        public void onTextChanged(CharSequence s, int start, int before, int count) { }
    };

    @Override
    public void click(Place place) {
        Toast.makeText(this, place.getAddress()+", "+place.getLatLng().latitude+place.getLatLng().longitude, Toast.LENGTH_SHORT).show();
    }
}

Адаптер

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.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.google.android.gms.common.api.ApiException;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
import com.google.android.gms.tasks.Tasks;
import com.google.android.libraries.places.api.model.AutocompletePrediction;
import com.google.android.libraries.places.api.model.AutocompleteSessionToken;
import com.google.android.libraries.places.api.model.Place;
import com.google.android.libraries.places.api.net.FetchPlaceRequest;
import com.google.android.libraries.places.api.net.FetchPlaceResponse;
import com.google.android.libraries.places.api.net.FindAutocompletePredictionsRequest;
import com.google.android.libraries.places.api.net.FindAutocompletePredictionsResponse;
import com.google.android.libraries.places.api.net.PlacesClient;
import com.zaaibo.drive.R;

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

public class PlacesAutoCompleteAdapter extends RecyclerView.Adapter<PlacesAutoCompleteAdapter.PredictionHolder> implements Filterable {
    private static final String TAG = "PlacesAutoAdapter";
    private ArrayList<PlaceAutocomplete> mResultList = new ArrayList<>();

    private Context mContext;
    private CharacterStyle STYLE_BOLD;
    private CharacterStyle STYLE_NORMAL;
    private final PlacesClient placesClient;
    private ClickListener clickListener;

    public PlacesAutoCompleteAdapter(Context context) {
        mContext = context;
        STYLE_BOLD = new StyleSpan(Typeface.BOLD);
        STYLE_NORMAL = new StyleSpan(Typeface.NORMAL);
        placesClient = com.google.android.libraries.places.api.Places.createClient(context);
    }

    public void setClickListener(ClickListener clickListener) {
        this.clickListener = clickListener;
    }

    public interface ClickListener {
        void click(Place place);
    }

    /**
     * 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();
                // Skip the autocomplete query if no constraints are given.
                if (constraint != null) {
                    // Query the autocomplete API for the (constraint) search string.
                    mResultList = getPredictions(constraint);
                    if (mResultList != null) {
                        // The API successfully returned results.
                        results.values = mResultList;
                        results.count = mResultList.size();
                    }
                }
                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.
                    notifyDataSetChanged();
                } else {
                    // The API did not return any results, invalidate the data set.
                    //notifyDataSetInvalidated();
                }
            }
        };
    }


    private ArrayList<PlaceAutocomplete> getPredictions(CharSequence constraint) {

        final ArrayList<PlaceAutocomplete> resultList = new ArrayList<>();

        // Create a new token for the autocomplete session. Pass this to FindAutocompletePredictionsRequest,
        // and once again when the user makes a selection (for example when calling fetchPlace()).
        AutocompleteSessionToken token = AutocompleteSessionToken.newInstance();

        //https://gist.github.com/graydon/11198540
        // Use the builder to create a FindAutocompletePredictionsRequest.
        FindAutocompletePredictionsRequest request = FindAutocompletePredictionsRequest.builder()
                // Call either setLocationBias() OR setLocationRestriction().
                //.setLocationBias(bounds)
                //.setCountry("BD")
                //.setTypeFilter(TypeFilter.ADDRESS)
                .setSessionToken(token)
                .setQuery(constraint.toString())
                .build();

        Task<FindAutocompletePredictionsResponse> autocompletePredictions = placesClient.findAutocompletePredictions(request);

        // 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(autocompletePredictions, 60, TimeUnit.SECONDS);
        } catch (ExecutionException | InterruptedException | TimeoutException e) {
            e.printStackTrace();
        }

        if (autocompletePredictions.isSuccessful()) {
            FindAutocompletePredictionsResponse findAutocompletePredictionsResponse = autocompletePredictions.getResult();
            if (findAutocompletePredictionsResponse != null)
                for (AutocompletePrediction prediction : findAutocompletePredictionsResponse.getAutocompletePredictions()) {
                    Log.i(TAG, prediction.getPlaceId());
                    resultList.add(new PlaceAutocomplete(prediction.getPlaceId(), prediction.getPrimaryText(STYLE_NORMAL).toString(), prediction.getFullText(STYLE_BOLD).toString()));
                }

            return resultList;
        } else {
            return resultList;
        }

    }

    @NonNull
    @Override
    public PredictionHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View convertView = layoutInflater.inflate(R.layout.place_recycler_item_layout, viewGroup, false);
        return new PredictionHolder(convertView);
    }

    @Override
    public void onBindViewHolder(@NonNull PredictionHolder mPredictionHolder, final int i) {
        mPredictionHolder.address.setText(mResultList.get(i).address);
        mPredictionHolder.area.setText(mResultList.get(i).area);
    }

    @Override
    public int getItemCount() {
        return mResultList.size();
    }

    public PlaceAutocomplete getItem(int position) {
        return mResultList.get(position);
    }

    public class PredictionHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        private TextView address, area;
        private LinearLayout mRow;

        PredictionHolder(View itemView) {
            super(itemView);
            area = itemView.findViewById(R.id.place_area);
            address = itemView.findViewById(R.id.place_address);
            mRow = itemView.findViewById(R.id.place_item_view);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            PlaceAutocomplete item = mResultList.get(getAdapterPosition());
            if (v.getId() == R.id.place_item_view) {

                String placeId = String.valueOf(item.placeId);

                List<Place.Field> placeFields = Arrays.asList(Place.Field.ID, Place.Field.NAME, Place.Field.LAT_LNG, Place.Field.ADDRESS);
                FetchPlaceRequest request = FetchPlaceRequest.builder(placeId, placeFields).build();
                placesClient.fetchPlace(request).addOnSuccessListener(new OnSuccessListener<FetchPlaceResponse>() {
                    @Override
                    public void onSuccess(FetchPlaceResponse response) {
                        Place place = response.getPlace();
                        clickListener.click(place);
                    }
                }).addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception exception) {
                        if (exception instanceof ApiException) {
                            Toast.makeText(mContext, exception.getMessage() + "", Toast.LENGTH_SHORT).show();
                        }
                    }
                });
            }
        }
    }

    /**
     * Holder for Places Geo Data Autocomplete API results.
     */
    public class PlaceAutocomplete {

        public CharSequence placeId;
        public CharSequence address, area;

        PlaceAutocomplete(CharSequence placeId, CharSequence area, CharSequence address) {
            this.placeId = placeId;
            this.area = area;
            this.address = address;
        }

        @Override
        public String toString() {
            return area.toString();
        }
    }
}

Answer 3

Я использовал этот класс адаптера после включения Google Places API : -

public class PlaceAutoCompleteAdapter
        extends ArrayAdapter<AutocompletePrediction> implements Filterable {

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

    /**
     * Handles autocomplete requests.
     */
    private GoogleApiClient mGoogleApiClient;

    /**
     * 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, GoogleApiClient googleApiClient,
                                    LatLngBounds bounds, AutocompleteFilter filter) {
        super(context, android.R.layout.simple_expandable_list_item_2, android.R.id.text1);
        mGoogleApiClient = googleApiClient;
        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.
     * objects to store the Place ID and description that the API returns.
     * 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 Places#GEO_DATA_API#getAutocomplete(CharSequence)
     * @see AutocompletePrediction#freeze()
     */
    private ArrayList<AutocompletePrediction> getAutocomplete(CharSequence constraint) {
        if (mGoogleApiClient.isConnected()) {
            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.
            PendingResult<AutocompletePredictionBuffer> results =
                    Places.GeoDataApi
                            .getAutocompletePredictions(mGoogleApiClient, 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.
            AutocompletePredictionBuffer autocompletePredictions = results
                    .await(60, TimeUnit.SECONDS);

            // Confirm that the query completed successfully, otherwise return null
            final Status status = autocompletePredictions.getStatus();
            if (!status.isSuccess()) {
                Toast.makeText(getContext(), "Error contacting API: " + status.toString(),
                        Toast.LENGTH_SHORT).show();
                Log.e(TAG, "Error getting autocomplete prediction API call: " + status.toString());
                autocompletePredictions.release();
                return null;
            }

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

            // Freeze the results immutable representation that can be stored safely.
            return DataBufferUtils.freezeAndClose(autocompletePredictions);
        }
        Log.e(TAG, "Google API client is not connected for autocomplete query.");
        return null;
    }


}

Мне также известно она данную видео ссылку