tempo di viaggio tra due posizioni nell'API Android di Google Maps V2

Question

come visualizzare il tempo di viaggio tra due posizioni nell'API di Google Maps V2, nel mio programma utilizzando JSONParse per visualizzare la distanza di guida, ma non posso visualizzare il tempo di visualizzazione di viaggio, questo programma di esempio che ho fatto: DirectionActivity.java

public class DirectionActivity extends FragmentActivity implements OnMyLocationChangeListener{ 

private LatLng   start; 
private LatLng   end; 
private String   nama; 
private final String URL = "http://maps.googleapis.com/maps/api/directions/json?"; 
private GoogleMap  map; 
private JSONHelper  json; 
private ProgressDialog pDialog; 
private List<LatLng> listDirections; 

@Override 
protected void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_direction); 
    json = new JSONHelper(); 
    setupMapIfNeeded(); 

    Bundle b = getIntent().getExtras(); 
    if (b != null) 
    { 
     start = new LatLng(b.getDouble(MainActivity.KEY_LAT_ASAL), b.getDouble(MainActivity.KEY_LNG_ASAL)); 
     end = new LatLng(b.getDouble(MainActivity.KEY_LAT_TUJUAN), b.getDouble(MainActivity.KEY_LNG_TUJUAN)); 
     nama = b.getString(MainActivity.KEY_NAMA); 
    } 

    new AsyncTaskDirection().execute(); 
} 

private void setupMapIfNeeded() 
{ 
    if (map == null) 
    { 
     FragmentManager fragmentManager = getSupportFragmentManager(); 
     SupportMapFragment supportMapFragment = (SupportMapFragment) fragmentManager 
       .findFragmentById(R.id.mapsdirections); 
     map = supportMapFragment.getMap(); 

     if (map != null) 
     { 
      setupMap(); 
     } 
    } 

} 

private void setupMap() 
{ 
    map.setMyLocationEnabled(true); 
    map.setOnMyLocationChangeListener(this); 
    moveToMyLocation(); 
} 

private void moveToMyLocation() 
{ 
    LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
    Criteria criteria = new Criteria(); 

    Location location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, false)); 
    if (location != null) 
    { 
     map.animateCamera(CameraUpdateFactory.newLatLngZoom(
       new LatLng(location.getLatitude(), location.getLongitude()), 13)); 
    } 
} 

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

@Override 
protected void onResume() 
{ 
    // TODO Auto-generated method stub 
    super.onResume(); 
    int resCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext()); 
    if (resCode != ConnectionResult.SUCCESS) 
    { 
     GooglePlayServicesUtil.getErrorDialog(resCode, this, 1); 
    } 
} 

private class AsyncTaskDirection extends AsyncTask<Void, Void, Void> 
{ 
    @Override 
    protected Void doInBackground(Void... params) 
    { 
     String uri = URL 
       + "origin=" + start.latitude + "," + start.longitude 
       + "&destination=" + end.latitude + "," + end.longitude 
       + "&sensor=true&units=metric"; 

     JSONObject jObject = json.getJSONFromURL(uri); 
     listDirections = json.getDirection(jObject); 

     return null; 
    } 

    @Override 
    protected void onPreExecute() 
    { 
     // TODO Auto-generated method stub 
     super.onPreExecute(); 
     pDialog = new ProgressDialog(DirectionActivity.this); 
     pDialog.setMessage("Loading...."); 
     pDialog.setCancelable(true); 
     pDialog.show(); 
    } 

    @Override 
    protected void onPostExecute(Void result) 
    { 
     // TODO Auto-generated method stub 
     super.onPostExecute(result); 
     pDialog.dismiss(); 
     gambarDirection(); 
    } 

} 

public void gambarDirection() 
{ 
    PolylineOptions line = new PolylineOptions().width(3).color(Color.BLUE); 
    for (int i = 0; i < listDirections.size(); i++) 
    { 
     line.add(listDirections.get(i)); 
    } 
    map.addPolyline(line); 

    // tambah marker di posisi end 
    map.addMarker(new MarkerOptions() 
      .position(end) 
      .title(nama)); 
} 

@Override 
public void onMyLocationChange(Location location) 
{ 
    Toast.makeText(this, "Lokasi berubah ke " + location.getLatitude() + "," + location.getLongitude(), 
      Toast.LENGTH_SHORT).show(); 

} 

} 

JSONHelper.java

public class JSONHelper 
{ 
private InputStream  is    = null; 
private JSONObject  jsonObject  = null; 
private String   json   = ""; 

private final String TAG_TEMPATMAKAN = "tempatmakan"; 
private final String TAG_ID   = "id"; 
private final String TAG_NAMA  = "nama"; 
private final String TAG_ALAMAT  = "alamat"; 
private final String TAG_LAT   = "lat"; 
private final String TAG_LNG   = "lng"; 
private final String TAG_ROUTES  = "routes"; 
private final String TAG_LEGS  = "legs"; 
private final String TAG_STEPS  = "steps"; 
private final String TAG_POLYLINE = "polyline"; 
private final String TAG_POINTS  = "points"; 
private final String TAG_START  = "start_location"; 
private final String TAG_END   = "end_location"; 

public JSONObject getJSONFromURL(String url) 
{ 
    try 
    { 
     DefaultHttpClient httpClient = new DefaultHttpClient(); 
     HttpGet httpGet = new HttpGet(url); 

     HttpResponse httpResponse = httpClient.execute(httpGet); 
     HttpEntity httpEntity = httpResponse.getEntity(); 
     is = httpEntity.getContent(); 
    } catch (UnsupportedEncodingException e) 
    { 
     e.printStackTrace(); 
    } catch (ClientProtocolException e) 
    { 
     e.printStackTrace(); 
    } catch (IOException e) 
    { 
     e.printStackTrace(); 
    } 

    try 
    { 
     BufferedReader reader = new BufferedReader(new InputStreamReader(
       is, "iso-8859-1"), 8); 

     StringBuilder sb = new StringBuilder(); 
     String line = null; 

     while ((line = reader.readLine()) != null) 
     { 
      sb.append(line + "\n"); 
     } 

     is.close(); 
     json = sb.toString(); 
    } catch (Exception e) 
    { 
     // TODO: handle exception 
    } 

    try 
    { 
     jsonObject = new JSONObject(json); 

    } catch (JSONException e) 
    { 
     // TODO: handle exception 
    } 

    return jsonObject; 
} 

public ArrayList<TempatMakan> getTempatMakanAll(JSONObject jobj) 
{ 
    ArrayList<TempatMakan> listTempatMakan = new ArrayList<TempatMakan>(); 

    try 
    { 
     JSONArray arrayTempatMakan = jobj.getJSONArray(TAG_TEMPATMAKAN); 

     for (int i = 0; i < arrayTempatMakan.length(); i++) 
     { 
      JSONObject jobject = arrayTempatMakan.getJSONObject(i); 

      Log.d("log", "muter ke " + i); 
      listTempatMakan.add(new TempatMakan(jobject.getInt(TAG_ID), jobject.getString(TAG_NAMA), jobject 
        .getString(TAG_ALAMAT), jobject 
        .getDouble(TAG_LAT), jobject.getDouble(TAG_LNG))); 

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

/* 
* Untuk decode Polyline 
* 
* @params String 
* 
* @return List<LatLng> 
*/ 
private List<LatLng> decodePoly(String encoded) 
{ 
    List<LatLng> poly = new ArrayList<LatLng>(); 
    int index = 0, len = encoded.length(); 
    int lat = 0, lng = 0; 
    while (index < len) 
    { 
     int b, shift = 0, result = 0; 
     do 
     { 
      b = encoded.charAt(index++) - 63; 
      result |= (b & 0x1f) << shift; 
      shift += 5; 
     } while (b >= 0x20); 
     int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1)); 
     lat += dlat; 
     shift = 0; 
     result = 0; 
     do 
     { 
      b = encoded.charAt(index++) - 63; 
      result |= (b & 0x1f) << shift; 
      shift += 5; 
     } while (b >= 0x20); 
     int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1)); 
     lng += dlng; 

     LatLng position = new LatLng((double) lat/1E5, (double) lng/1E5); 
     poly.add(position); 
    } 
    return poly; 

} 

/* 
* Untuk mendapatkan direction 
* 
* @params JSONObject 
* 
* @return List<LatLng> 
*/ 
public List<LatLng> getDirection(JSONObject jObj) 
{ 

    List<LatLng> directions = new ArrayList<LatLng>(); 

    try 
    { 
     JSONObject objRoute = jObj.getJSONArray(TAG_ROUTES).getJSONObject(0); 
     JSONObject objLegs = objRoute.getJSONArray(TAG_LEGS).getJSONObject(0); 
     JSONArray arraySteps = objLegs.getJSONArray(TAG_STEPS); 
     for (int wi2t = 0; wi2t < arraySteps.length(); wi2t++) 
     { 
      JSONObject step = arraySteps.getJSONObject(wi2t); 
      JSONObject objStart = step.getJSONObject(TAG_START); 
      JSONObject objEnd = step.getJSONObject(TAG_END); 
      double latStart = objStart.getDouble(TAG_LAT); 
      double lngStart = objStart.getDouble(TAG_LNG); 

      directions.add(new LatLng(latStart, lngStart)); 

      JSONObject poly = step.getJSONObject(TAG_POLYLINE); 
      String encodedPoly = poly.getString(TAG_POINTS); 

      List<LatLng> decodedPoly = decodePoly(encodedPoly); 
      for (int eka = 0; eka < decodedPoly.size(); eka++) 
      { 
       directions.add(new LatLng(decodedPoly.get(eka).latitude, decodedPoly.get(eka).longitude)); 
      } 

      double latEnd = objEnd.getDouble(TAG_LAT); 
      double lngEnd = objEnd.getDouble(TAG_LNG); 
      directions.add(new LatLng(latEnd, lngEnd)); 

     } 
    } catch (JSONException e) 
    { 
     // TODO: handle exception 
    } 

    return directions; 
} 
} 

MainActivity.java

public class MainActivity extends FragmentActivity implements OnInfoWindowClickListener 
{ 
private GoogleMap   map; 
private JSONHelper   json; 
private ProgressDialog  pDialog; 
private Button  btnGetDirection; 

private List<TempatMakan> listTempatMakan; 
private final String  URL_API  = "http://lhocation1203.hostzi.com/dataapi/tempatmakan.php"; 

public static final String KEY_NAMA = "nama"; 
public static final String KEY_ALAMAT = "alamat"; 
public static final String KEY_LAT_TUJUAN = "lat_tujuan"; 
public static final String KEY_LNG_TUJUAN = "lng_tujuan"; 
public static final String KEY_LAT_ASAL = "lat_asal"; 
public static final String KEY_LNG_ASAL = "lng_asal"; 

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

    new AsynTaskMain().execute(); 

    setupMapIfNeeded(); 
} 

private void setupMapIfNeeded() 
{ 
    if (map == null) 
    { 
     FragmentManager fragmentManager = getSupportFragmentManager(); 
     SupportMapFragment supportMapFragment = (SupportMapFragment) fragmentManager.findFragmentById(R.id.maps); 
     map = supportMapFragment.getMap(); 

     if (map != null) 
     { 
      setupMap(); 
     } 
    } 

} 

private void setupMap() 
{ 
    map.setMyLocationEnabled(true); 
    map.setOnInfoWindowClickListener(this); 
    moveToMyLocation(); 
} 

private void moveToMyLocation() 
{ 
    LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
    Criteria criteria = new Criteria(); 

    Location location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, false)); 
    if (location != null) 
    { 
     map.animateCamera(CameraUpdateFactory.newLatLngZoom(
       new LatLng(location.getLatitude(), location.getLongitude()), 13)); 
    } 
} 

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

@Override 
protected void onResume() 
{ 
    // TODO Auto-generated method stub 
    super.onResume(); 

    int resCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext()); 
    if (resCode != ConnectionResult.SUCCESS) 
    { 
     GooglePlayServicesUtil.getErrorDialog(resCode, this, 1); 
    } 
} 

private class AsynTaskMain extends AsyncTask<Void, Void, Void> 
{ 

    @Override 
    protected void onPostExecute(Void result) 
    { 
     // TODO Auto-generated method stub 
     pDialog.dismiss(); 
     runOnUiThread(new Runnable() 
     { 

      @Override 
      public void run() 
      { 
       // TODO Auto-generated method stub 
       for (int i = 0; i < listTempatMakan.size(); i++) 
       { 

        map.addMarker(new MarkerOptions() 
          .position(new LatLng(listTempatMakan.get(i).getLat(), 
            listTempatMakan.get(i).getLng())) 
          .title(listTempatMakan.get(i).getNama()) 
          .snippet(listTempatMakan.get(i).getAlamat())); 

       } 
      } 
     }); 

     super.onPostExecute(result); 
    } 

    @Override 
    protected void onPreExecute() 
    { 
     // TODO Auto-generated method stub 
     super.onPreExecute(); 
     pDialog = new ProgressDialog(MainActivity.this); 
     pDialog.setMessage("Loading...."); 
     pDialog.setCancelable(true); 
     pDialog.show(); 
    } 

    @Override 
    protected Void doInBackground(Void... params) 
    { 
     // TODO Auto-generated method stub 

     JSONObject jObject = json.getJSONFromURL(URL_API); 
     listTempatMakan = json.getTempatMakanAll(jObject); 
     return null; 
    } 
} 

@Override 
public void onInfoWindowClick(Marker marker) 
{ 
    // marker id -> m0, m1, m2 dst.. 
    String id = marker.getId(); 
    id = id.substring(1); 

    LatLng myLocation = new LatLng(map.getMyLocation().getLatitude(), map.getMyLocation().getLongitude()); 

    if (myLocation != null) 
    { 
     Bundle bundle = new Bundle(); 
     bundle.putString(KEY_NAMA, listTempatMakan.get(Integer.parseInt(id)).getNama()); 
     bundle.putString(KEY_ALAMAT, listTempatMakan.get(Integer.parseInt(id)).getAlamat()); 
     bundle.putDouble(KEY_LAT_TUJUAN, marker.getPosition().latitude); 
     bundle.putDouble(KEY_LNG_TUJUAN, marker.getPosition().longitude); 
     bundle.putDouble(KEY_LAT_ASAL, myLocation.latitude); 
     bundle.putDouble(KEY_LNG_ASAL, myLocation.longitude); 

     Intent i = new Intent(MainActivity.this, InfoTempatMakanActivity.class); 
     i.putExtras(bundle); 
     startActivity(i); 

    } else 
    { 
     Toast.makeText(this, "Tidak dapat menemukan lokasi anda ", Toast.LENGTH_LONG).show(); 
    } 
} 
} 

InfoTempatMakanActivity.java

public class InfoTempatMakanActivity extends Activity implements OnClickListener 
{ 

private TextView tvNama; 
private TextView tvAlamat; 
private Button  btnGetDirection; 

private LatLng  lokasiTujuan; 
private LatLng  lokasiAwal; 
private String  nama; 
private String  alamat; 

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

    initialize(); 

    Bundle bundle = getIntent().getExtras(); 
    if (bundle != null) 
    { 
     nama = bundle.getString(MainActivity.KEY_NAMA); 
     alamat = bundle.getString(MainActivity.KEY_ALAMAT); 
     lokasiTujuan = new LatLng(bundle.getDouble(MainActivity.KEY_LAT_TUJUAN), 
       bundle.getDouble(MainActivity.KEY_LNG_TUJUAN)); 
     lokasiAwal = new LatLng(bundle.getDouble(MainActivity.KEY_LAT_ASAL), 
       bundle.getDouble(MainActivity.KEY_LNG_ASAL)); 
    } 

    setTeksView(); 

} 

private void setTeksView() 
{ 
    tvNama.setText(nama); 
    tvAlamat.setText(alamat); 
} 

private void initialize() 
{ 
    tvAlamat = (TextView) findViewById(R.id.alamatTempatMakan); 
    tvNama = (TextView) findViewById(R.id.namaTempatMakan); 
    btnGetDirection = (Button) findViewById(R.id.btnDirection); 
    btnGetDirection.setOnClickListener(this); 
} 

@Override 
public void onClick(View v) 
{ 
    Bundle bundle = new Bundle(); 
    bundle.putDouble(MainActivity.KEY_LAT_ASAL, lokasiAwal.latitude); 
    bundle.putDouble(MainActivity.KEY_LNG_ASAL, lokasiAwal.longitude); 
    bundle.putDouble(MainActivity.KEY_LAT_TUJUAN, lokasiTujuan.latitude); 
    bundle.putDouble(MainActivity.KEY_LNG_TUJUAN, lokasiTujuan.longitude); 
    bundle.putString(MainActivity.KEY_NAMA, nama); 

    Intent intent = new Intent(this, DirectionActivity.class); 
    intent.putExtras(bundle); 

    startActivity(intent); 
} 

} 

TempatMakan.java

public class TempatMakan 
{ 
private int id; 
private String nama; 
private String alamat; 
private double lat; 
private double lng; 

public TempatMakan() 
{ 
    // TODO Auto-generated constructor stub 
} 

public TempatMakan(int id, String nama, String alamat, double lat, double lng) 
{ 
    super(); 
      this.id = id; 
    this.nama = nama; 
    this.alamat = alamat; 
    this.lat = lat; 
    this.lng = lng; 
} 

public String getNama() 
{ 
    return nama; 
} 

public void setNama(String nama) 
{ 
    this.nama = nama; 
} 

public String getAlamat() 
{ 
    return alamat; 
} 

public void setAlamat(String alamat) 
{ 
    this.alamat = alamat; 
} 

public double getLat() 
{ 
    return lat; 
} 

public void setLat(double lat) 
{ 
    this.lat = lat; 
} 

public double getLng() 
{ 
    return lng; 
} 

public void setLng(double lng) 
{ 
    this.lng = lng; 
} 

} 

Answer 1

Google Indicazioni JSON risposta è un oggetto chiamato distanza e la durata all'interno di "gambe" di array, in questo modo:

"legs": [ 
       { 
        "distance": { 
         "text": "0.3 km", 
         "value": 263 
        }, 
        "duration": { 
         "text": "1 min", 
         "value": 52 
        }, 
       ....... //omitted value 
     ] 

Così puoi provare ad analizzare la distanza e la durata (se ne hai bisogno) nella tua app. Forse in questo modo:

JSONArray legs = jobject.getString("legs"); 
for (int i = 0; i < legs.length(); i++) 
    { 
     JSONObject legsObject = legs.getJSONObject(i); 
     JSONObject distanceObject = legsObject.getString("distance"); 
     String distanceText = distanceObject.getString("text"); 
     String distanceValue = String.valueOf(distanceObject.getString("value")); 
     //do anything else 
    } 

oh, e mettere l'array gambe analisi all'interno del parsing ArrayTempatMakan. Posso ottenere la distanza e la durata usando il parser Jackson JSON, quindi dovresti essere in grado di farlo con parser JSON.

Buona fortuna ^^

EDIT:

In questo metodo getDirection (JSONObject jObj) È successo recuperare objLegs qui, è necessario per ottenere la distanza e la durata nel objLegs

JSONObject objRoute = jObj.getJSONArray(TAG_ROUTES).getJSONObject(0); 
    JSONObject objLegs = objRoute.getJSONArray(TAG_LEGS).getJSONObject(0); 
    JSONArray arraySteps = objLegs.getJSONArray(TAG_STEPS); 

penso che si dovrebbe aggiungere questo sotto objLegs:

JSONObject objDistance = objLegs.getJSONObject("distance"); 
JSONObject objDuration = objLegs.getJSONObject("duration"); 
String text_distance = objDistance.getString("text"); 
Log.d("Distance", text_distance); //adds an entry to the logCat, Check whether the value of Distance is successfully taken. 
String text_duration = objDuration.getString("text"); 
Log.d("Duration", text_duration); //adds an entry to the logCat, Check whether the value of Distance is successfully taken. 

Lì, credo che dovresti essere in grado di prendere il valore, dopodiché puoi semplicemente aggiungere il valore al risultato della lista.

Se non riesci ancora a inserire la distanza e la durata, includi la classe TempatMakan sul tuo post.

EDIT 2:

distanza Declare e la durata come stringa all'interno del vostro TempatMakan.Java:

private String durasi; 
private String jarak; 

all'interno del costruttore:

public TempatMakan(int id, String nama, String alamat, String jarak, String durasi, double lat, double lng) 
{ 
    super(); 
    this.id = id; 
    this.nama = nama; 
    this.alamat = alamat; 
    this.lat = lat; 
    this.lng = lng; 
    this.jarak = jarak; 
    this.durasi = durasi; 
} 

quindi dichiarare i rispettivi getter e setter per jarak e durasi.

All'interno della vostra JSONHelper.java, il metodo getTempatMakanAll, aggiungere questi:

for (int i = 0; i < arrayTempatMakan.length(); i++) 
     { 
      JSONObject jobject = arrayTempatMakan.getJSONObject(i); 
      JSONObject objRoute = jobject.getJSONArray(TAG_ROUTES).getJSONObject(0); 
      JSONObject objLegs = objRoute.getJSONArray(TAG_LEGS).getJSONObject(0); 
      JSONObject objDistance = objLegs.getJSONObject("distance"); 
      JSONObject objDuration = objLegs.getJSONObject("duration"); 

      Log.d("log", "muter ke " + i); 
      listTempatMakan.add(
      new TempatMakan(
        jobject.getInt(TAG_ID), 
        jobject.getString(TAG_NAMA), 
        jobject.getString(TAG_ALAMAT), 
        objDistance.getString("text"),//jarak 
        objDuration.getString("text"),//durasi 
        jobject.getDouble(TAG_LAT), 
        jobject.getDouble(TAG_LNG))); 

     } 

dopo che, è sufficiente modificare la scheda di ListView per visualizzare tali valori.

Buona fortuna, e Mi dispiace, non posso darvi un altro codice o modificare il progetto, che avrebbe dovuto capire da soli :)

P.S: skripsi o Tugas Kuliah?