android：獲取兩個地理位置之間的路線轉彎路線

我想要顯示兩個位置之間的轉彎路線。我試過android：獲取兩個地理位置之間的路線轉彎路線

uri = "http://maps.google.com/maps?saddr=" 
       + "lat1" + "," 
       + "lon1" + "&daddr=" 
       + "lat2" + "," + "long2"; 
     Intent intent = new Intent(android.content.Intent.ACTION_VIEW, 
       Uri.parse(uri));

它給出了路線。但我不想打開瀏覽器並顯示。相反，有一種方法可以獲取路線，以便它可以以我自己的佈局顯示。前爲文本視圖。

來源

2012-10-18 png

可以使用GoogleMap的API和解析器響應發送HTTP請求。 –

你能告訴哪個API – png

[谷歌方向API]（https://developers.google.com/maps/documentation/directions/） –

看看GreatMaps。他們有檢索路線的邏輯。它基於C＃，只是使用它們的邏輯並在Java中編寫等價物。

http://greatmaps.codeplex.com/

來源

2012-10-18 13:11:30

這些代碼我在畢業設計中寫道所以他們沒有優化。

MapService類：我從谷歌地圖的分析器數據響應。

public class MapService { 
public static final String TAG = "[MapService]"; 
public static final String GET_DIRECTION_URL = "http://maps.google.com/maps/api/directions/json?" + "origin=%f,%f" + "&destination=%f,%f" + "&sensor=true&language=en&units=metric"; 

public static DirectionResult getDirectionResult(double latitude1, double longtitude1, double latitude2, double longtitude2) { 
    String url = String.format(GET_DIRECTION_URL, latitude1, longtitude1, latitude2, longtitude2); 
    Log.d("URL", url); 
    // parse direction 
    DirectionParser directionParser = new DirectionParser() { 
     @Override 
     public void onSuccess(JSONObject json) throws JSONException { 
      // process response status 
      String status = json.getString("status"); 
      if (!status.equals("OK")) { 
       String error = null; 

       if (status.equals("NOT_FOUND") || status.equals("ZERO_RESULTS")) { 
        error = Global.application.getString(R.string.errCantGetDirection); 
       } else { 
        error = Global.application.getString(R.string.errGetDirection); 
       } 

       result.instructions = new String[] { error }; 
       result.hasError = true; 
       return; 
      } 

      /* 
      * routes[] legs[] steps[] html_instructions 
      */ 
      JSONArray arrRoutes = json.getJSONArray("routes"); 

      // no routes found 
      if (arrRoutes.length() == 0) { 
       result.instructions = new String[] { Global.application.getString(R.string.errCantGetDirection) }; 
       result.hasError = true; 
       return; 
      } 

      JSONArray arrLegs = arrRoutes.getJSONObject(0).getJSONArray("legs"); 
      JSONObject firstLeg = arrLegs.getJSONObject(0); 
      JSONArray arrSteps = firstLeg.getJSONArray("steps"); 
      int len = arrSteps.length(); 
      result.instructions = new String[len]; 
      result.points = new LinkedList<GeoPoint>(); 
      JSONObject leg = null; 

      // get instructions 
      for (int i = 0; i < len; ++i) { 
       leg = arrSteps.getJSONObject(i); 
       // location = leg.getJSONObject("start_location"); 
       String encoded = leg.getJSONObject("polyline").getString("points"); 
       result.points.addAll(decodePoly(encoded)); 

       result.instructions[i] = Html.fromHtml(leg.getString("html_instructions")).toString(); 
       Log.d("html_instructions", "" + Html.fromHtml(leg.getString("html_instructions"))); 
       // result.points[i] = new GeoPoint(
       // (int) (location.getDouble("lat") * 1E6), 
       // (int) (location.getDouble("lng") * 1E6)); 
      } 

      // location = leg.getJSONObject("end_location"); 
      // result.points[len] = new GeoPoint(
      // (int) (location.getDouble("lat") * 1E6), 
      // (int) (location.getDouble("lng") * 1E6)); 

      // distance and duration info 
      JSONObject distance = firstLeg.getJSONObject("distance"); 
      if (distance != null) { 
       result.distance = distance.getString("text"); 
      } 
      JSONObject duration = firstLeg.getJSONObject("duration"); 
      if (duration != null) { 
       result.duration = duration.getString("text"); 
      } 
     } 

     @Override 
     public void onFailure(String message) { 
      String error = "Error"; 

      result.instructions = new String[] { error }; 
      result.hasError = true; 
     } 
    }; 

    // return direction result 
    RestClient.getData(url, directionParser); 
    return directionParser.result; 
} 

private static List<GeoPoint> decodePoly(String encoded) { 
    List<GeoPoint> poly = new ArrayList<GeoPoint>(); 
    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; 

     GeoPoint p = new GeoPoint((int) (((double) lat/1E5) * 1E6), (int) (((double) lng/1E5) * 1E6)); 
     poly.add(p); 
    } 

    return poly; 
} 

    }

方向解析器和方向，結果

public class DirectionParser extends JSONParser { 
public DirectionResult result = new DirectionResult(); 

protected int jsonType = JSONParser.GOOGLE_DIRECTION_JSON; 

public DirectionParser() { 
    jsonType = JSONParser.GOOGLE_DIRECTION_JSON; 
} 

@Override 
public void onFailure(String message) { 
} 

@Override 
public void onSuccess(JSONObject json) throws JSONException { 
} 
} 

public class DirectionResult { 
public String[] instructions; 
public List<GeoPoint> points; 
public String duration; 
public String distance; 
public boolean hasError = false; 
}

你想要的是DirectionResult的指令。你可以簡單的創建一個數組適配器字符串數組

instructions = directionResult.instructions;// DirectionResult you got from MapService. 
    ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(DirectionListActivity.this, android.R.layout.simple_list_item_1, instructions); 
       listDirection.setAdapter(adapter1);

更新：另一個解析器我發現Google-Maps-Directions-API-Java-Parser

來源

2012-11-01 06:56:49

android：獲取兩個地理位置之間的路線轉彎路線

回答

相關問題