Question

package com.example.googlemapstestproject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.SimpleAdapter;
import android.widget.Toast;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.GoogleMap.OnMyLocationButtonClickListener;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends ActionBarActivity implements OnMapLongClickListener, OnMyLocationButtonClickListener,
        android.view.View.OnClickListener {

    private GoogleMap mMap;
    Button userLocation;`enter code here`
    GPSTracker gps;

    PlacesTask placesTask;
    ParserTask parserTask;

    AutoCompleteTextView autoCompView;

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

        autoCompView = (AutoCompleteTextView) findViewById(R.id.atv_places);


        autoCompView.setThreshold(1);

        autoCompView.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                placesTask = new PlacesTask();
                placesTask.execute(s.toString());
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                // TODO Auto-generated method stub
            }

            @Override
            public void afterTextChanged(Editable s) {
                // TODO Auto-generated method stub

            }
        });

        try {
            // Loading map
            initilizeMap();

        } catch (Exception e) {
            e.printStackTrace();
        }

        mMap.setOnMapLongClickListener(this);
        mMap.setMyLocationEnabled(true);
        mMap.getUiSettings().setZoomControlsEnabled(true);
    }


    private String downloadUrl(String strUrl) throws IOException {

        String data = "";
        InputStream iStream = null;
        HttpURLConnection urlConnection = null;
        try {

            URL url = new URL(strUrl);

            // Creating an http connection to communicate with url
            urlConnection = (HttpURLConnection) url.openConnection();

            // Connecting to url
            urlConnection.connect();

            // Reading data from url
            iStream = urlConnection.getInputStream();

            BufferedReader br = new BufferedReader(new InputStreamReader(iStream));

            StringBuffer sb = new StringBuffer();

            String line = "";
            while ((line = br.readLine()) != null) {

                sb.append(line);
            }

            data = sb.toString();
            br.close();

        } catch (Exception e) {

            Log.d("Exception while downloading url", e.toString());

        } 
        finally {

            iStream.close();
            urlConnection.disconnect();
        }

        return data;
    }

    // Fetches all places from GooglePlaces AutoComplete Web Service
    private class PlacesTask extends AsyncTask<String, Void, String> {

        @Override
        protected String doInBackground(String... place) {

            // For storing data from web service
            String data = "";

            // Obtain browser key from https://code.google.com/apis/console
            String key = "key=AIzaSyDTg7d-JNRLRxe75QDEEeAGr1xnSHGX9V4";

            String input = "";

            try {
                input = "input=" + URLEncoder.encode(place[0], "utf-8");
            } catch (UnsupportedEncodingException e1) {
                e1.printStackTrace();
            }

            // place type to be searched
            String types = "types=(cities)";

            // Sensor enabled
            String sensor = "sensor=false";

            // Building the parameters to the web service
            String parameters = input + "&" + types + "&" + sensor + "&" + key;

            // Output format
            String output = "json";

            // Building the url to the web service
            String url = "https://maps.googleapis.com/maps/api/place/autocomplete/" + output + "?" + parameters;

            try {
                // Fetching the data from we service
                data = downloadUrl(url);
            } catch (Exception e) {
                Log.d("Background Task", e.toString());
            }
            return data;
        }


        // Executed after the complete execution of doInBackground() method
        @Override
        protected void onPostExecute(String result) {

            // Instantiating ParserTask which parses the json data from
            // Geocoding webservice
            // in a non-ui thread
            ParserTask parserTask = new ParserTask();

            // Start parsing the places in JSON format
            // Invokes the "doInBackground()" method of the class ParseTask
            parserTask.execute(result);
        }
    }

    // A class to parse the Google Places in JSON format
    private class ParserTask extends AsyncTask<String, Integer, List<HashMap<String, String>>> {

        JSONObject jObject;

        @Override
        protected List<HashMap<String, String>> doInBackground(String... jsonData) {

            List<HashMap<String, String>> places = null;

            PlaceJSONParser placeJsonParser = new PlaceJSONParser();


            try {
                jObject = new JSONObject(jsonData[0]);

                // Getting the parsed data as a List
                places = placeJsonParser.parse(jObject);

            } catch (Exception e) {
                Log.d("Exception", e.toString());
            }
            return places;
        }


        @Override
        protected void onPostExecute(List<HashMap<String, String>> result) {

            String[] from = new String[] { "description" };
            int[] to = new int[] { R.layout.listview_layout };

            // Creating a SimpleAdapter for the AutoCompleteTextView
            SimpleAdapter adapter = new SimpleAdapter(getBaseContext(), result, android.R.layout.simple_list_item_1, from, to);

            // Setting the adapter
            autoCompView.setAdapter(adapter);
        }
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub

    }
}

更新了代码更新，一切看起来都很好，只是当我在一个地方输入时没有任何东西出现。

我已经将谷歌地图的一半做了一个列表视图，所以如果有人有任何好的解决方案如何让他们一起工作那将是伟大的。

Answer 1

如果您想使用提供GooglePlaceAutoComplete小部件的库，请查看Sprockets（我是开发人员）。使用您的API密钥进行设置后，您可以在布局中添加一个有效的Places API自动填充功能，例如：

<net.sf.sprockets.widget.GooglePlaceAutoComplete
    xmlns:sprockets="http://schemas.android.com/apk/res-auto"
    android:id="@+id/place"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    sprockets:types="(cities)"/>

谷歌地图Places API无法正常工作

1 个答案: