android–在Google地图上显示多个点之间的路线

我创建了自己的自定义地图,以显示我当前的位置和地图上的多个点.它工作正常,但现在我想显示从我当前位置到地图上每个点的路线.你能给我一些建议我怎么能这样做？谢谢.

这是我的customMap活动：

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 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;
}
}


这是叠加类：

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 mOverlays = new ArrayList();
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;
}
}


解决方法:

这个link有教程在我们的应用程序中绘制地图上的路径路径.这可能对你有帮助
使用下面的链接地图应用程序…这将在谷歌地图应用程序中

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);


要么

重新链接此链接how to display the driving routes