如何在Android Studio Google Maps V2中显示行车路线
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How to display the driving routes in Android Studio Google Maps V2
提问by user_Dennis_Mostajo
well I have the latitude and longitude of 3 people, I need to get and display the route between my location and the other 3 like this:
好吧，我有 3 个人的经纬度，我需要获取并显示我的位置和其他 3 个人之间的路线，如下所示：
I have a little data Base in my app with 3 contacts and my code is like:
我的应用程序中有一个包含 3 个联系人的小数据库，我的代码如下：
package androiddatabase.app;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.view.Window;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
/**
* Created by Dennis and Rodrigo on 5/6/2014.
*/
public class RutasActivity extends FragmentActivity implements View.OnClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_ruta);
GoogleMap mapa = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
mapa.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
mapa.setMyLocationEnabled(true);
mapa.getMyLocation();
CargarContactos(this, mapa);
//--------------------------------//
// GREETINGS //
// FROM BOLIVIA!!! //
// n_n //
//--------------------------------//
}
private void CargarContactos(Context context,GoogleMap mapa){
myApp.DBManager manager = new myApp.DBManager(context);
Cursor cursor = manager.CargarMapa();
if (cursor.moveToFirst()) {
do
{
if (cursor.getString(4).toString().contains("1")) {
mapa.addMarker(new MarkerOptions()
.position(
new LatLng(Double.parseDouble(cursor.getString(2)),
Double.parseDouble(cursor.getString(3)))
)
.title(cursor.getString(7) + " - " + cursor.getString(1))
.snippet("Fecha: " + cursor.getString(5) + " Monto: " + cursor.getString(6))
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.familia)));
}
else
{
mapa.addMarker(new MarkerOptions()
.position(
new LatLng(Double.parseDouble(cursor.getString(2)),
Double.parseDouble(cursor.getString(3)))
)
.title(cursor.getString(7) + " - " + cursor.getString(1))
.snippet("Fecha: " + cursor.getString(5) + " Monto: " + cursor.getString(6))
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.amigos)));
}
}
while(cursor.moveToNext());
}
cursor.close();
manager.CloseManager();
}
}
}
and only can show the positions like this:
并且只能显示这样的位置：
so how can I show or display the route in driving mode between my location and other points?I see any examples or tutorials but in someones examples exists differences between the libraries like:
那么如何在驾驶模式下显示或显示我所在位置和其他点之间的路线？我看到任何示例或教程，但在某些示例中，库之间存在差异，例如：
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;
for ADT or Eclipse and
对于 ADT 或 Eclipse 和
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
for Android Studio
安卓工作室
or GeoPoint is the equivalent to LatLng?
或 GeoPoint 相当于 LatLng？
or am I wrong in something or forget something, how can I put my LatLng objects from my database in an array for show the route? any help? thanks Guys
或者我在某些事情上错了或忘记了某些事情，我如何将我的数据库中的 LatLng 对象放入一个数组中以显示路线？有什么帮助吗？谢谢你们
回答by Emre Ko?
If you want to display route between two points, you need to use Google Directions APIto retrieve sub points between 2 locations.
如果要显示两点之间的路线，则需要使用Google Directions API来检索 2 个位置之间的子点。
For example, you can get route between Toronto and Montreal as JSON with this url https://maps.googleapis.com/maps/api/directions/json?origin=Toronto&destination=Montreal
例如，您可以使用此 URL https://maps.googleapis.com/maps/api/directions/json?origin=Toronto&destination=Montreal以 JSON 格式获取多伦多和蒙特利尔之间的路线
After getting these points you just have to put them onto map with map.addPolylinemethod.
获得这些点后，您只需使用map.addPolyline方法将它们放到地图上。
回答by dilettante
You should try this Driving route directions
你应该试试这个 行车路线
