在Google地圖上顯示多個點之間的路線

Question

我已經創建了自己的自定義地圖，以在地圖上顯示我的當前位置和多個點。它工作正常，但現在我想顯示從我的當前位置到地圖上的每個點的路線。可以給我一些建議，我該如何做到這一點？謝謝。

這是我customMap活動：

public class CustomMapActivity extends MapActivity { 

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

     String provider = ""; 
     Criteria crit = new Criteria(); 
     Location loc = new Location(""); 
     LocationManager mlocManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE); 

     MapView mapView = (MapView) findViewById(R.id.mapview); 
     mapView.setBuiltInZoomControls(true); 

     List<Overlay> mapOverlays = mapView.getOverlays(); 
     Drawable drawable = this.getResources().getDrawable(R.drawable.marker); 
     ItemizedOverlayedClass itemizedoverlay = new ItemizedOverlayedClass(drawable, this); 

      try 
      { 
      MyLocationOverlay mylocationOverlay = new MyLocationOverlay(this, mapView); 
      mylocationOverlay.enableMyLocation(); 
      mapView.getOverlays().add(mylocationOverlay);   
      provider = mlocManager.getBestProvider(crit, false); 
      loc = mlocManager.getLastKnownLocation(provider); 
      } 
      catch(Exception ex) 
      { 
      //Toast.makeText(this, "Unable to retrive provider", Toast.LENGTH_LONG).show(); 
      } 


     for (ServiceActivity activity : DataSources.ActivitiesList) 
     { 
      try 
      { 
       Location siteLocation = new Location(""); 
       siteLocation.setLatitude(activity.SiteLatitude); 
       siteLocation.setLongitude(activity.SiteLongitude); 

       GeoPoint point = new GeoPoint((int)(activity.SiteLatitude * 1e6),(int)(activity.SiteLongitude * 1e6)); 
       OverlayItem overlayitem = new OverlayItem(point, activity.SiteName+ " " + activity.SiteAddress, "Distance to this location: " + String.valueOf(loc.distanceTo(siteLocation)/1000) + " km"); 

       itemizedoverlay.addOverlay(overlayitem); 
       mapOverlays.add(itemizedoverlay); 
      } 
      catch(Exception ex) 
      { 
       @SuppressWarnings("unused") 
       AlertDialogClass alert = new AlertDialogClass(this,ex.getMessage()); 
      } 
     } 




    } 

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

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

    @Override 
    protected boolean isRouteDisplayed() { 
     // TODO Auto-generated method stub 
     return false; 
    } 


} 

，這是覆蓋類：

package com.example.srwebservice; 


import java.util.ArrayList; 

import android.app.AlertDialog; 
import android.content.Context; 
import android.graphics.drawable.Drawable; 

import com.google.android.maps.ItemizedOverlay; 
import com.google.android.maps.OverlayItem; 

public class ItemizedOverlayedClass extends ItemizedOverlay { 

    private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>(); 
    Context mContext; 

    public ItemizedOverlayedClass(Drawable defaultMarker) 
    { 
     super(boundCenterBottom(defaultMarker)); 
     // TODO Auto-generated constructor stub 
    } 

    public ItemizedOverlayedClass(Drawable defaultMarker, Context context) 
    { 
     super(boundCenterBottom(defaultMarker)); 
     mContext = context; 
    } 

    @Override 
    protected OverlayItem createItem(int i) 
    { 
     // TODO Auto-generated method stub 
     return mOverlays.get(i); 
    } 

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

    public void addOverlay(OverlayItem overlay) 
    { 
     mOverlays.add(overlay); 
     populate(); 
    } 
    @Override 
    protected boolean onTap(int index) { 
     OverlayItem item = mOverlays.get(index); 
     AlertDialog.Builder dialog = new AlertDialog.Builder(mContext); 
     dialog.setTitle(item.getTitle()); 
     dialog.setMessage(item.getSnippet()); 
     dialog.show(); 
     return true; 
    } 
} 

Answer 1

我發現了一個更簡單的解決方案。我可以直接使用谷歌地圖，我不需要再創建自定義地圖活動：

if(DataSources.ActivitiesList.length >0) 
{ 
    String address = "http://maps.google.com/maps?daddr=" + DataSources.ActivitiesList[0].SiteLatitude.toString() + "," + DataSources.ActivitiesList[0].SiteLongitude.toString(); 
for (int i= 1 ;i < DataSources.ActivitiesList.length ; i++) 
{ 
    if(DataSources.ActivitiesList[i].SiteLatitude != null) 
     address += "+to:" + DataSources.ActivitiesList[i].SiteLatitude + "," + DataSources.ActivitiesList[i].SiteLongitude; 
} 
Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(address)); 
    startActivity(intent); 
    break;  
} 

Answer 2

這link有教程繪製地圖在我們的應用程序的路由路徑。這可以幫助你和下面 使用地圖應用鏈接...這將帶給你在谷歌地圖應用

String uri = "http://maps.google.com/maps?f=d&hl=en&saddr="+source_latitude+","+source_longitude+"&daddr="+destination_latitude+","+destination_longitude; 
Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(uri)); 
intent.setClassName("com.google.android.apps.maps", "com.google.android.maps.MapsActivity"); 
startActivity(intent); 

OR

refter此鏈接how to display the driving routes

Answer 3

package org.ci.geo.route.android; 

import java.io.IOException; 
import java.io.InputStream; 
import java.net.MalformedURLException; 
import java.net.URL; 
import java.net.URLConnection; 
import java.util.ArrayList; 
import java.util.List; 

import org.ci.geo.route.Road; 
import org.ci.geo.route.RoadProvider; 

import android.graphics.Bitmap; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.Point; 
import android.graphics.Bitmap.Config; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.widget.LinearLayout; 
import android.widget.TextView; 

import com.google.android.maps.GeoPoint; 
import com.google.android.maps.MapActivity; 
import com.google.android.maps.MapController; 
import com.google.android.maps.MapView; 
import com.google.android.maps.Overlay; 

public class MapRouteActivity extends MapActivity { 

     LinearLayout linearLayout; 
     MapView mapView; 
     private Road mRoad; 

     @Override 
     public void onCreate(Bundle savedInstanceState) { 
       super.onCreate(savedInstanceState); 
       setContentView(R.layout.main); 
       mapView = (MapView) findViewById(R.id.mapview); 
       mapView.setBuiltInZoomControls(true); 

       new Thread() { 
         @Override 
         public void run() { 
           double fromLat = 49.85, fromLon = 24.016667, toLat = 50.45, toLon = 30.523333; 
           String url = RoadProvider 
               .getUrl(fromLat, fromLon, toLat, toLon); 
           InputStream is = getConnection(url); 
           mRoad = RoadProvider.getRoute(is); 
           mHandler.sendEmptyMessage(0); 
         } 
       }.start(); 
     } 

     Handler mHandler = new Handler() { 
       public void handleMessage(android.os.Message msg) { 
         TextView textView = (TextView) findViewById(R.id.description); 
         textView.setText(mRoad.mName + " " + mRoad.mDescription); 
         MapOverlay mapOverlay = new MapOverlay(mRoad, mapView); 
         List<Overlay> listOfOverlays = mapView.getOverlays(); 
         listOfOverlays.clear(); 
         listOfOverlays.add(mapOverlay); 
         mapView.invalidate(); 
       }; 
     }; 

     private InputStream getConnection(String url) { 
       InputStream is = null; 
       try { 
         URLConnection conn = new URL(url).openConnection(); 
         is = conn.getInputStream(); 
       } catch (MalformedURLException e) { 
         e.printStackTrace(); 
       } catch (IOException e) { 
         e.printStackTrace(); 
       } 
       return is; 
     } 

     @Override 
     protected boolean isRouteDisplayed() { 
       return false; 
     } 
} 

class MapOverlay extends com.google.android.maps.Overlay { 
     Road mRoad; 
     ArrayList<GeoPoint> mPoints; 

     public MapOverlay(Road road, MapView mv) { 
       mRoad = road; 
       if (road.mRoute.length > 0) { 
         mPoints = new ArrayList<GeoPoint>(); 
         for (int i = 0; i < road.mRoute.length; i++) { 
           mPoints.add(new GeoPoint((int) (road.mRoute[i][1] * 1000000), 
               (int) (road.mRoute[i][0] * 1000000))); 
         } 
         int moveToLat = (mPoints.get(0).getLatitudeE6() + (mPoints.get(
             mPoints.size() - 1).getLatitudeE6() - mPoints.get(0) 
             .getLatitudeE6())/2); 
         int moveToLong = (mPoints.get(0).getLongitudeE6() + (mPoints.get(
             mPoints.size() - 1).getLongitudeE6() - mPoints.get(0) 
             .getLongitudeE6())/2); 
         GeoPoint moveTo = new GeoPoint(moveToLat, moveToLong); 

         MapController mapController = mv.getController(); 
         mapController.animateTo(moveTo); 
         mapController.setZoom(7); 
       } 
     } 

     @Override 
     public boolean draw(Canvas canvas, MapView mv, boolean shadow, long when) { 
       super.draw(canvas, mv, shadow); 
       drawPath(mv, canvas); 
       return true; 
     } 

     public void drawPath(MapView mv, Canvas canvas) { 
       int x1 = -1, y1 = -1, x2 = -1, y2 = -1; 
       Paint paint = new Paint(); 
       paint.setColor(Color.GREEN); 
       paint.setStyle(Paint.Style.STROKE); 
       paint.setStrokeWidth(3); 
       for (int i = 0; i < mPoints.size(); i++) { 
         Point point = new Point(); 
         mv.getProjection().toPixels(mPoints.get(i), point); 
         x2 = point.x; 
         y2 = point.y; 
         if (i > 0) { 
           canvas.drawLine(x1, y1, x2, y2, paint); 
         } 
         x1 = x2; 
         y1 = y2; 
       } 
     } 
} 


http://code.google.com/p/j2memaprouteprovider/source/browse/trunk/J2MEMapRouteAndroidEx/src/org/ci/geo/route/android/MapRouteActivity.java