Autore Topic: Errore nel caricamento dei Point Of Interest  (Letto 481 volte)

Offline Trinkwasser

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Errore nel caricamento dei Point Of Interest
« il: 19 Settembre 2015, 21:45:57 CEST »
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Su una mappa devo caricare dei PoI, lo faccio attraverso le Google Places Api. Che poi ho abilitato dalla mia console personale, insieme a tutte le api da utilizzare. Ho ottenuto le mie due chiavi e le ho inserite nel mio manifest e nel mio codice! Quando vado a caricare la mappa compare, ma se provo a cercare un qualche PoI vicino la mia posizione non succede assolutamente nulla.
Questa è la mia activity principale: MapActivity.java
Codice (Java): [Seleziona]
import android.app.Dialog;
import android.content.Intent;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnInfoWindowClickListener;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.List;

public class MapActivity extends FragmentActivity implements LocationListener {

    String permission = "android.permission-group.LOCATION";

    GoogleMap mGoogleMap;
    Spinner mSprPlaceType;

    String[] mPlaceType = null;
    String[] mPlaceTypeName = null;

    double mLatitude = 0;
    double mLongitude = 0;

    HashMap<String, String> mMarkerPlaceLink = new HashMap<String, String>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_map);

        /* Array of place types */
        mPlaceType = getResources().getStringArray(R.array.place_type);

        /* Array of place type names */
        mPlaceTypeName = getResources().getStringArray(R.array.place_type_name);

        /* Creating an array adapter with an array of Place types
         * to populate the spinner */

        ArrayAdapter<String> adapter = new ArrayAdapter<String>
                (this, android.R.layout.simple_spinner_dropdown_item, mPlaceTypeName);

        /* Getting reference to the Spinner */
        mSprPlaceType = (Spinner) findViewById(R.id.spr_place_type);

        /* Setting adapter on Spinner to set place types */
        mSprPlaceType.setAdapter(adapter);

        Button btnFind;

        /* Getting reference to Find Button */
        btnFind = (Button) findViewById(R.id.btn_find);

        /* Getting Google Play availability status */
        int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());

        /* Google Play Services are not available */
        if(status != ConnectionResult.SUCCESS) {

            int requestCode = 10;
            Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
            dialog.show();

        } else { /* Google Play Services are available */
            ContextCompat.checkSelfPermission(this, permission);

            /* Getting reference to the SupportMapFragment */
            SupportMapFragment fragment = ( SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);

            // Getting Google Map
            mGoogleMap = fragment.getMap();

            // Enabling MyLocation in Google Map
            mGoogleMap.setMyLocationEnabled(true);

            // Getting LocationManager object from System Service LOCATION_SERVICE
            LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

            // Creating a criteria object to retrieve provider
            Criteria criteria = new Criteria();

            // Getting the name of the best provider
            String provider = locationManager.getBestProvider(criteria, true);

            // Getting Current Location From GPS
            Location location = locationManager.getLastKnownLocation(provider);

            if(location!=null){
                onLocationChanged(location);
            }

            locationManager.requestLocationUpdates(provider, 20000, 0, this);

            mGoogleMap.setOnInfoWindowClickListener(new OnInfoWindowClickListener() {

                @Override
                public void onInfoWindowClick(Marker arg0) {
                    Intent intent = new Intent(getBaseContext(), PlaceDetailsActivity.class);
                    String reference = mMarkerPlaceLink.get(arg0.getId());
                    intent.putExtra("reference", reference);

                    // Starting the Place Details Activity
                    startActivity(intent);
                }
            });

            // Setting click event lister for the find button
            btnFind.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {

                    int selectedPosition = mSprPlaceType.getSelectedItemPosition();
                    String type = mPlaceType[selectedPosition];

                    StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/nearbysearch/json?");
                    sb.append("location="+mLatitude+","+mLongitude);
                    sb.append("&radius=5000");
                    sb.append("&types="+type);
                    sb.append("&sensor=true");
                    sb.append("&key=API_BROWSER_KEY");

                    // Creating a new non-ui thread task to download json data
                    PlacesTask placesTask = new PlacesTask();

                    // Invokes the "doInBackground()" method of the class PlaceTask
                    placesTask.execute(sb.toString());

                }
            });

        }

    }

    /** A method to download json data from url */
    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 down ur", e.toString());
        }finally{
            iStream.close();
            urlConnection.disconnect();
        }

        return data;
    }

    /* A class, to download Google Places */
    private class PlacesTask extends AsyncTask<String, Integer, String>{

        String data = null;

        // Invoked by execute() method of this object
        @Override
        protected String doInBackground(String... url) {
            try{
                data = downloadUrl(url[0]);
            }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){
            ParserTask parserTask = new ParserTask();

            // Start parsing the Google 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;

        // Invoked by execute() method of this object
        @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 construct */
                places = placeJsonParser.parse(jObject);

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

        // Executed after the complete execution of doInBackground() method
        @Override
        protected void onPostExecute(List<HashMap<String,String>> list){

            // Clears all the existing markers
            mGoogleMap.clear();

            for(int i=0;i<list.size();i++){

                // Creating a marker
                MarkerOptions markerOptions = new MarkerOptions();

                // Getting a place from the places list
                HashMap<String, String> hmPlace = list.get(i);

                // Getting latitude of the place
                double lat = Double.parseDouble(hmPlace.get("lat"));

                // Getting longitude of the place
                double lng = Double.parseDouble(hmPlace.get("lng"));

                // Getting name
                String name = hmPlace.get("place_name");

                // Getting vicinity
                String vicinity = hmPlace.get("vicinity");

                LatLng latLng = new LatLng(lat, lng);

                // Setting the position for the marker
                markerOptions.position(latLng);

                // Setting the title for the marker.
                //This will be displayed on taping the marker
                markerOptions.title(name + " : " + vicinity);

                // Placing a marker on the touched position
                Marker m = mGoogleMap.addMarker(markerOptions);

                // Linking Marker id and place reference
                mMarkerPlaceLink.put(m.getId(), hmPlace.get("reference"));
            }
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public void onLocationChanged(Location location) {
        mLatitude = location.getLatitude();
        mLongitude = location.getLongitude();
        LatLng latLng = new LatLng(mLatitude, mLongitude);

        mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(12));
    }

    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub
    }

    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub
    }
}
che si appoggia ad una classe JSON per richiamare il PoI. PlaceJSONParser.java
Codice (Java): [Seleziona]
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class PlaceJSONParser {

    /** Receives a JSONObject and returns a list */
    public List<HashMap<String,String>> parse(JSONObject jObject){

        JSONArray jPlaces = null;
        try {
            /** Retrieves all the elements in the 'places' array */
            jPlaces = jObject.getJSONArray("results");
        } catch (JSONException e) {
            e.printStackTrace();
        }
        /** Invoking getPlaces with the array of json object
         * where each json object represent a place
         */

        return getPlaces(jPlaces);
    }


    private List<HashMap<String, String>> getPlaces(JSONArray jPlaces){
        int placesCount = jPlaces.length();
        List<HashMap<String, String>> placesList = new ArrayList<HashMap<String,String>>();
        HashMap<String, String> place = null;

        /** Taking each place, parses and adds to list object */
        for(int i=0; i<placesCount;i++){
            try {
                /** Call getPlace with place JSON object to parse the place */
                place = getPlace((JSONObject)jPlaces.get(i));
                placesList.add(place);

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

        return placesList;
    }

    /** Parsing the Place JSON object */
    private HashMap<String, String> getPlace(JSONObject jPlace){

        HashMap<String, String> place = new HashMap<String, String>();
        String placeName = "-NA-";
        String vicinity="-NA-";
        String latitude="";
        String longitude="";
        String reference="";


        try {
            // Extracting Place name, if available
            if(!jPlace.isNull("name")){
                placeName = jPlace.getString("name");
            }

            // Extracting Place Vicinity, if available
            if(!jPlace.isNull("vicinity")){
                vicinity = jPlace.getString("vicinity");
            }

            latitude = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lat");
            longitude = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lng");
            reference = jPlace.getString("reference");


            place.put("place_name", placeName);
            place.put("vicinity", vicinity);
            place.put("lat", latitude);
            place.put("lng", longitude);
            place.put("reference", reference);


        } catch (JSONException e) {
            e.printStackTrace();
        }
        return place;
    }
}
Inoltre dovrebbe essere possibile clicclare sul marker che compare sulla mappa ed avere delle informazioni aggiuntive. PlaceDetailsActivity.java
Codice (Java): [Seleziona]
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.webkit.WebView;

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;

public class PlaceDetailsActivity extends Activity {
    WebView mWvPlaceDetails;


    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_place_details);

        // Getting reference to WebView ( wv_place_details ) of the layout activity_place_details
        mWvPlaceDetails = (WebView) findViewById(R.id.wv_place_details);

        mWvPlaceDetails.getSettings().setUseWideViewPort(false);

        // Getting place reference from the map
        String reference = getIntent().getStringExtra("reference");


        StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/details/json?");
        sb.append("reference="+reference);
        sb.append("&sensor=true");
        sb.append("&key=YOUR_BROWSER_API_KEY_FOR_PLACES");


        // Creating a new non-ui thread task to download Google place details
        PlacesTask placesTask = new PlacesTask();

        // Invokes the "doInBackground()" method of the class PlaceTask
        placesTask.execute(sb.toString());

    };


    /** A method to download json data from url */
    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;
    }


    /** A class, to download Google Place Details */
    private class PlacesTask extends AsyncTask<String, Integer, String>{

        String data = null;

        // Invoked by execute() method of this object
        @Override
        protected String doInBackground(String... url) {
            try{
                data = downloadUrl(url[0]);
            }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){
            ParserTask parserTask = new ParserTask();

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


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

        JSONObject jObject;

        // Invoked by execute() method of this object
        @Override
        protected HashMap<String,String> doInBackground(String... jsonData) {

            HashMap<String, String> hPlaceDetails = null;
            PlaceDetailsJSONParser placeDetailsJsonParser = new PlaceDetailsJSONParser();

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

                // Start parsing Google place details in JSON format
                hPlaceDetails = placeDetailsJsonParser.parse(jObject);

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

        // Executed after the complete execution of doInBackground() method
        @Override
        protected void onPostExecute(HashMap<String,String> hPlaceDetails){


            String name = hPlaceDetails.get("name");
            String icon = hPlaceDetails.get("icon");
            String vicinity = hPlaceDetails.get("vicinity");
            String lat = hPlaceDetails.get("lat");
            String lng = hPlaceDetails.get("lng");
            String formatted_address = hPlaceDetails.get("formatted_address");
            String formatted_phone = hPlaceDetails.get("formatted_phone");
            String website = hPlaceDetails.get("website");
            String rating = hPlaceDetails.get("rating");
            String international_phone_number = hPlaceDetails.get("international_phone_number");
            String url = hPlaceDetails.get("url");


            String mimeType = "text/html";
            String encoding = "utf-8";

            String data =       "<html>"+
                    "<body><img style='float:left' src="+icon+" /><h1><center>"+name+"</center></h1>" +
                    "<br style='clear:both' />" +
                    "<hr  />"+
                    "<p>Vicinity : " + vicinity + "</p>" +
                    "<p>Location : " + lat + "," + lng + "</p>" +
                    "<p>Address : " + formatted_address + "</p>" +
                    "<p>Phone : " + formatted_phone + "</p>" +
                    "<p>Website : " + website + "</p>" +
                    "<p>Rating : " + rating + "</p>" +
                    "<p>International Phone  : " + international_phone_number + "</p>" +
                    "<p>URL  : <a href='" + url + "'>" + url + "</p>" +
                    "</body></html>";

            // Setting the data in WebView
            mWvPlaceDetails.loadDataWithBaseURL("", data, mimeType, encoding, "");
        }
    }
}
che anche questo si appoggia ad una classe JSON per recuperare queste informazioni aggiuntive. PlaceDetailsJSONParser.java
Codice (Java): [Seleziona]
import org.json.JSONException;
import org.json.JSONObject;

import java.util.HashMap;

public class PlaceDetailsJSONParser {

    /** Receives a JSONObject and returns a list */
    public HashMap<String,String> parse(JSONObject jObject){

        JSONObject jPlaceDetails = null;
        try {
            /** Retrieves all the elements in the 'places' array */
            jPlaceDetails = jObject.getJSONObject("result");
        } catch (JSONException e) {
            e.printStackTrace();
        }
        /** Invoking getPlaces with the array of json object
         * where each json object represent a place
         */

        return getPlaceDetails(jPlaceDetails);
    }


    /** Parsing the Place Details Object object */
    private HashMap<String, String> getPlaceDetails(JSONObject jPlaceDetails){


        HashMap<String, String> hPlaceDetails = new HashMap<String, String>();

        String name = "-NA-";
        String icon = "-NA-";
        String vicinity="-NA-";
        String latitude="";
        String longitude="";
        String formatted_address="-NA-";
        String formatted_phone="-NA-";
        String website="-NA-";
        String rating="-NA-";
        String international_phone_number="-NA-";
        String url="-NA-";

        try {
            // Extracting Place name, if available
            if(!jPlaceDetails.isNull("name")){
                name = jPlaceDetails.getString("name");
            }

            // Extracting Icon, if available
            if(!jPlaceDetails.isNull("icon")){
                icon = jPlaceDetails.getString("icon");
            }

            // Extracting Place Vicinity, if available
            if(!jPlaceDetails.isNull("vicinity")){
                vicinity = jPlaceDetails.getString("vicinity");
            }

            // Extracting Place formatted_address, if available
            if(!jPlaceDetails.isNull("formatted_address")){
                formatted_address = jPlaceDetails.getString("formatted_address");
            }

            // Extracting Place formatted_phone, if available
            if(!jPlaceDetails.isNull("formatted_phone_number")){
                formatted_phone = jPlaceDetails.getString("formatted_phone_number");
            }

            // Extracting website, if available
            if(!jPlaceDetails.isNull("website")){
                website = jPlaceDetails.getString("website");
            }

            // Extracting rating, if available
            if(!jPlaceDetails.isNull("rating")){
                rating = jPlaceDetails.getString("rating");
            }

            // Extracting rating, if available
            if(!jPlaceDetails.isNull("international_phone_number")){
                international_phone_number = jPlaceDetails.getString("international_phone_number");
            }

            // Extracting url, if available
            if(!jPlaceDetails.isNull("url")){
                url = jPlaceDetails.getString("url");
            }

            latitude = jPlaceDetails.getJSONObject("geometry").getJSONObject("location").getString("lat");
            longitude = jPlaceDetails.getJSONObject("geometry").getJSONObject("location").getString("lng");


            hPlaceDetails.put("name", name);
            hPlaceDetails.put("icon", icon);
            hPlaceDetails.put("vicinity", vicinity);
            hPlaceDetails.put("lat", latitude);
            hPlaceDetails.put("lng", longitude);
            hPlaceDetails.put("formatted_address", formatted_address);
            hPlaceDetails.put("formatted_phone", formatted_phone);
            hPlaceDetails.put("website", website);
            hPlaceDetails.put("rating", rating);
            hPlaceDetails.put("international_phone_number", international_phone_number);
            hPlaceDetails.put("url", url);

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

        return hPlaceDetails;
    }
}
I layout sono: activity_map.xml
Codice (XML): [Seleziona]
<RelativeLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MapActivity" >

    <Spinner
       android:id="@+id/spr_place_type"
       android:layout_width="wrap_content"
       android:layout_height="60dp"
       android:layout_alignParentTop="true" />

    <Button
       android:id="@+id/btn_find"
       android:layout_width="wrap_content"
       android:layout_height="60dp"
       android:layout_alignParentTop="true"
       android:layout_toRightOf="@id/spr_place_type"
       android:text="@string/str_btn_find" />

    <fragment
       xmlns:android="http://schemas.android.com/apk/res/android"
       android:id="@+id/map"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_below="@id/spr_place_type"
       class="com.google.android.gms.maps.SupportMapFragment" />

</RelativeLayout>
activity_place_details.xml
Codice (XML): [Seleziona]
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical" >

    <WebView
       android:id="@+id/wv_place_details"
       android:layout_width="fill_parent"
       android:layout_height="match_parent"  />
   
</LinearLayout>
queste sono le stringhe che utilizzo invec: strings.xml
Codice (XML): [Seleziona]
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="str_btn_find">Find</string>

    <string-array name="place_type">
        <item>airport</item>
        <item>atm</item>
        <item>bank</item>
        <item>bus_station</item>
        <item>church</item>
        <item>doctor</item>
        <item>hospital</item>
        <item>mosque</item>
        <item>movie_theater</item>
        <item>hindu_temple</item>
        <item>ristorante</item>
    </string-array>

    <string-array name="place_type_name">
        <item>Airport</item>
        <item>ATM</item>
        <item>Bank</item>
        <item>Bus Station</item>
        <item>Church</item>
        <item>Doctor</item>
        <item>Hospital</item>
        <item>Mosque</item>
        <item>Movie Theater</item>
        <item>Hindu Temple</item>
        <item>Restaurant</item>
    </string-array>

</resources>