在Android Studio内部打开Goog​​le Directions API

Question

I am currently developing an application in Android Studio and I have included both the Google Maps API and Google Directions API within the app. I have included a button in my app which allows the user to be guided to their selected location.

The following code uses the Google Maps API, opens up Google Maps within the application but shows the marker on the maps without giving directions to that place:

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);

    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
}

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;

    // Add a marker at the Oval and move the camera
    LatLng oval = new LatLng(53.3484013,-6.2605243);
    mMap.addMarker(new MarkerOptions().position(oval).title("Oval Pub"));
    mMap.moveCamera(CameraUpdateFactory.newLatLng(oval));

The below code uses the Google Directions API and gives the user a guide to their selected destination:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);


    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
}

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;

    Uri gmmIntentUri = Uri.parse("google.navigation:q=The+Oval+Bar,+Dublin+Ireland");
    Intent mapIntent = new Intent(Intent.ACTION_VIEW, gmmIntentUri);
    mapIntent.setPackage("com.google.android.apps.maps");
    startActivity(mapIntent);

The only problem being the above code relating to the Google Directions API, opens the Google Maps application outside my application. I was wondering how to get it to open within the application itself.

Answer 1

您应该使用com.google.android.gms.maps.MapFragment片段，如Lars Vogel这篇出色的文章中所示： http : //www.vogella.com/tutorials/AndroidGoogleMaps/article.html