java - 使用 Google Maps API v2 获取行车路线

Question

我正在尝试获取两个位置之间的行驶方向：

LatLng(12.917745600000000000,77.623788300000000000)
LatLng(12.842056800000000000,7.663096499999940000)

我尝试过的代码：

Polyline line = mMap.addPolyline(new PolylineOptions().
    add(new LatLng(12.917745600000000000,77.623788300000000000),
    new LatLng(12.842056800000000000,7.663096499999940000))
       .width(5).color(Color.RED));

但这在两点之间画了一条直线。

是否有任何其他方法/方式来获取这两点之间的行车路线。

Answer 1

我刚刚在 Android 上发布了最新的 Google Maps Direction API 库 https://github.com/akexorcist/Android-GoogleDirectionLibrary

Answer 2

这就是我正在使用的，

Intent intent = new Intent(android.content.Intent.ACTION_VIEW, 
Uri.parse("http://maps.google.com/maps?saddr="+latitude_cur+","+longitude_cur+"&daddr="+latitude+","+longitude));
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addCategory(Intent.CATEGORY_LAUNCHER );     
intent.setClassName("com.google.android.apps.maps", "com.google.android.maps.MapsActivity");
startActivity(intent);

Answer 3

您还可以尝试以下旨在帮助使用该 api 的项目。它在这里：https ://github.com/MathiasSeguy-Android2EE/GDirectionsApiUtils

它是如何工作的，绝对简单：

public class MainActivity extends ActionBarActivity implements DCACallBack{
/**
 * Get the Google Direction between mDevice location and the touched location using the     Walk
 * @param point
 */
private void getDirections(LatLng point) {
     GDirectionsApiUtils.getDirection(this, mDeviceLatlong, point,     GDirectionsApiUtils.MODE_WALKING);
}

/*
 * The callback
 * When the direction is built from the google server and parsed, this method is called and give you the expected direction
 */
@Override
public void onDirectionLoaded(List<GDirection> directions) {        
    // Display the direction or use the DirectionsApiUtils
    for(GDirection direction:directions) {
        Log.e("MainActivity", "onDirectionLoaded : Draw GDirections Called with path " + directions);
        GDirectionsApiUtils.drawGDirection(direction, mMap);
    }
}