Changing StreetView<->Satellite Google Maps And

问题:

i wanna switch my GoogleMaps view between StreetView and Satellite via menubutton.

Here's my code:

public boolean onCreateOptionsMenu(Menu menu){

    menu.add(0, 0, 0, "StreetView");
    menu.add(0, 0, 1, "Satellite");

    return true;
}

public boolean onOptionsItemSelected (MenuItem item){

    switch (item.getItemId()){
        case 0:
            mapView.setStreetView(true);
        return true;

        case 1 :
            mapView.setSatellite(true);
        return true;

    }

    return false;
}

Won't work.. what do i wrong?

Thanks, prexx

回答1:

When you say it doesn't work, we really need more info to try and help you! Does it crash, does it stay on Street/Sat View or just normal map etc, try to give more info and if it crashed post a copy of the logcat.

I think all you are missing is the line:

(EDIT: I just tried it without calling invalidate and it works so it must be the menu button ID's)

mapView.invalidate();

You need to call this in order for the mapView to refresh itself, so call it every time you change the mapView settings.

---

If that doesnt work then it may be your id's for the buttons arent recognised in your switch so try setting up your menu as an xml file int res/menu/ like:

<?xml version="1.0" encoding="utf-8"?>
<menu
  xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:title="Street View" android:numericShortcut="1" android:id="@+id/mapStreet" ></item>
  <item android:title="Sat View" android:numericShortcut="2" android:id="@+id/mapSat"></item>
</menu>

Then modify your code to:

public boolean onCreateOptionsMenu(Menu menu){
    super.onCreateOptionsMenu(menu);
    MenuInflater oMenu = getMenuInflater();
    oMenu.inflate(R.menu.mapsmenu, menu);
    return true;
}

public boolean onOptionsItemSelected(MenuItem item){
    switch(item.getItemId()){
    case R.id.mapStreet:
         mapView.setStreetView(true);
         mapView.setSatellite(false);
         mapView.invalidate();
         return true;

    case R.id.mapSat:
         mapView.setSatellite(true);
         mapView.setStreetView(false);
         mapView.invalidate();
         return true;
    }
    return false;
}

回答2:

Dont use MapView. Use GoogleMap and do

GoogleMap map;
map.setMapType(GoogleMap.MAP_TYPE_SATELLITE);