如何导航地图（Android Maps API v2)

Question

public class showroommap extends Activity {
static final LatLng HAMBURG = new LatLng(53.558, 9.927);
static final LatLng KIEL = new LatLng(52.633011,-1.132913);
private GoogleMap map;



 @Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
setContentView(R.layout.showroommap);
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
    .getMap();
Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
    .title("Hamburg"));
Marker kiel = map.addMarker(new MarkerOptions()
    .position(KIEL)
    .title("Kiel")
    .snippet("Kiel is cool")
    .icon(BitmapDescriptorFactory
        .fromResource(R.drawable.ic_launcher)));

//Move the camera instantly to hamburg with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));

//Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
 }

@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
 }

} 

Answer 1

如果我理解正确的话，你想要的是用纬度和经度向谷歌地图应用程序发送一个意图，这样用户就可以导航到特定的locaiton。以下是我在应用程序中实现它的方法：

Intent navigation = new Intent(Intent.ACTION_VIEW, Uri.parse("google.navigation:q=" +latlong.latitude+","+latlong.longitude));
        startActivity(navigation);

latlong是LatLNG类型。

更新1-收听对标记的点击

public class showroommap extends Activity implements onMarkerClickListener {
static final LatLng HAMBURG = new LatLng(53.558, 9.927);
static final LatLng KIEL = new LatLng(52.633011,-1.132913);
private GoogleMap map;



 @Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
setContentView(R.layout.showroommap);
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
    .getMap();
map.setOnMakerClickListener(this); //Register this Activity to the onMarkerClickListener
Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
    .title("Hamburg"));
Marker kiel = map.addMarker(new MarkerOptions()
    .position(KIEL)
    .title("Kiel")
    .snippet("Kiel is cool")
    .icon(BitmapDescriptorFactory
        .fromResource(R.drawable.ic_launcher)));

//Move the camera instantly to hamburg with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));

//Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
 }

@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
 }

@Override
 public boolean onMarkerClick(final Marker marker) {

    if (marker.equals(kiel)) 
    {
        //handle click here
     return true;
    }
    else if (marker.equals(hamburg)) 
    {
        //handle click here
        return true;
    }
    return false;
}

}