对导航视图或 fragment 调用 setCustomControl 方法，并指定要使用的控件和位置。
以下示例展示了添加到 SupportNavigationFragment 的自定义 View：
private SupportNavigationFragment mNavFragment;
mNavFragment = (SupportNavigationFragment)
getFragmentManager().findFragmentById(R.id.navigation_fragment);
// Create the custom control view.
MyCustomView myCustomView = new MyCustomView();
// Add the custom control to the bottom end corner of the layout.
mNavFragment.setCustomControl(myCustomView, CustomControlPosition.
BOTTOM_END_BELOW);
package com.example.navsdkcustomization;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;
import androidx.annotation.NonNull;
import com.google.android.libraries.navigation.Camera;
import com.google.android.libraries.navigation.LatLng;
import com.google.android.libraries.navigation.ListenableResultFuture;
import com.google.android.libraries.navigation.Marker;
import com.google.android.libraries.navigation.MarkerOptions;
import com.google.android.libraries.navigation.NavigationApi;
import com.google.android.libraries.navigation.NavigationMap;
import com.google.android.libraries.navigation.Navigator;
import com.google.android.libraries.navigation.SimulationOptions;
import com.google.android.libraries.navigation.StylingOptions;
import com.google.android.libraries.navigation.SupportNavigationFragment;
import com.google.android.libraries.navigation.Waypoint;
/**
* An activity that displays a map and a customized navigation UI.
*/
public class NavigationActivityCustomization extends AppCompatActivity {
private static final String TAG = NavigationActivityCustomization.class.getSimpleName();
private Navigator mNavigator;
private SupportNavigationFragment mNavFragment;
private NavigationMap mMap;
// Define the Sydney Opera House by specifying its place ID.
private static final String SYDNEY_OPERA_HOUSE = "ChIJ3S-JXmauEmsRUcIaWtf4MzE";
// Set fields for requesting location permission.
private static final int PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1;
private boolean mLocationPermissionGranted;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initialize the Navigation SDK.
initializeNavigationSdk();
}
/**
* Starts the Navigation SDK and sets the camera to follow the device's location.
* Calls the navigateToPlace() method when the navigator is ready.
*/
private void initializeNavigationSdk() {
/*
* Request location permission, so that we can get the location of the
* device. The result of the permission request is handled by a callback,
* onRequestPermissionsResult.
*/
if (ContextCompat.checkSelfPermission(this.getApplicationContext(),
android.Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
mLocationPermissionGranted = true;
} else {
ActivityCompat.requestPermissions(this,
new String[] { android.Manifest.permission.ACCESS_FINE_LOCATION },
PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
}
if (!mLocationPermissionGranted) {
displayMessage("Error loading Navigation SDK: "
+ "The user has not granted location permission.");
return;
}
// Get a navigator.
NavigationApi.getNavigator(this, new NavigationApi.NavigatorListener() {
/**
* Sets up the navigation UI when the navigator is ready for use.
*/
@Override
public void onNavigatorReady(Navigator navigator) {
displayMessage("Navigator ready.");
mNavigator = navigator;
mNavFragment = (SupportNavigationFragment) getFragmentManager()
.findFragmentById(R.id.navigation_fragment);
// Navigate to a place, specified by Place ID.
navigateToPlace(SYDNEY_OPERA_HOUSE);
}
/**
* Handles errors from the Navigation SDK.
* @param errorCode The error code returned by the navigator.
*/
@Override
public void onError(@NavigationApi.ErrorCode int errorCode) {
switch (errorCode) {
case NavigationApi.ErrorCode.NOT_AUTHORIZED:
displayMessage("Error loading Navigation SDK: Your API key is "
+ "invalid or not authorized to use the Navigation SDK.");
break;
case NavigationApi.ErrorCode.TERMS_NOT_ACCEPTED:
displayMessage("Error loading Navigation SDK: User did not accept "
+ "the Navigation Terms of Use.");
break;
case NavigationApi.ErrorCode.NETWORK_ERROR:
displayMessage("Error loading Navigation SDK: Network error.");
break;
case NavigationApi.ErrorCode.LOCATION_PERMISSION_MISSING:
displayMessage("Error loading Navigation SDK: Location permission "
+ "is missing.");
break;
default:
displayMessage("Error loading Navigation SDK: " + errorCode);
}
}
});
}
/**
* Customizes the navigation UI and the map.
*/
private void customizeNavigationUI() {
// Set custom colors for the navigator.
mNavFragment.setStylingOptions(new StylingOptions()
.primaryDayModeThemeColor(0xff1A237E)
.secondaryDayModeThemeColor(0xff3F51B5)
.primaryNightModeThemeColor(0xff212121)
.secondaryNightModeThemeColor(0xff424242)
.headerLargeManeuverIconColor(0xffffff00)
.headerSmallManeuverIconColor(0xffffa500)
.headerNextStepTypefacePath("/system/fonts/NotoSerif-BoldItalic.ttf")
.headerNextStepTextColor(0xff00ff00)
.headerNextStepTextSize(20f)
.headerDistanceTypefacePath("/system/fonts/NotoSerif-Italic.ttf")
.headerDistanceValueTextColor(0xff00ff00)
.headerDistanceUnitsTextColor(0xff0000ff)
.headerDistanceValueTextSize(20f)
.headerDistanceUnitsTextSize(18f)
.headerInstructionsTypefacePath("/system/fonts/NotoSerif-BoldItalic.ttf")
.headerInstructionsTextColor(0xffffff00)
.headerInstructionsFirstRowTextSize(24f)
.headerInstructionsSecondRowTextSize(20f)
.headerGuidanceRecommendedLaneColor(0xffffa500));
// Get the map.
mMap = mNavFragment.getMap();
// Turn off the traffic layer on the map.
mMap.setTrafficEnabled(false);
// Place a marker at the final destination.
if (mNavigator.getCurrentRouteSegment() != null) {
LatLng destinationLatLng = mNavigator.getCurrentRouteSegment()
.getDestinationLatLng();
Bitmap destinationMarkerIcon = BitmapFactory.decodeResource(
getResources(), R.drawable.ic_person_pin_48dp);
mMap.addMarker(new MarkerOptions()
.position(destinationLatLng)
.icon(destinationMarkerIcon)
.title("Destination marker"));
// Listen for a tap on the marker.
mMap.setOnMarkerClickListener(new NavigationMap.OnMarkerClickListener() {
@Override
public void onMarkerClick(Marker marker) {
displayMessage("Marker tapped: "
+ marker.getTitle() + ", at location "
+ marker.getPosition().latitude + ", "
+ marker.getPosition().longitude);
}
});
}
// Set the camera to follow the device location with 'TILTED' driving view.
mNavFragment.getCamera().followMyLocation(Camera.Perspective.TILTED);
}
/**
* Requests directions from the user's current location to a specific place (provided
* by the Google Places API).
*/
private void navigateToPlace(String placeId) {
Waypoint destination;
try {
destination = Waypoint.fromPlaceId(placeId, null);
} catch (Waypoint.UnsupportedPlaceIdException e) {
displayMessage("Error starting navigation: Place ID is not supported.");
return;
}
// Create a future to await the result of the asynchronous navigator task.
ListenableResultFuture<Navigator.RouteStatus> pendingRoute =
mNavigator.setDestination(destination);
// Define the action to perform when the SDK has determined the route.
pendingRoute.setOnResultListener(
new ListenableResultFuture.OnResultListener<Navigator.RouteStatus>() {
@Override
public void onResult(Navigator.RouteStatus code) {
switch (code) {
case OK:
// Hide the toolbar to maximize the navigation UI.
if (getActionBar() != null) {
getActionBar().hide();
}
// Customize the navigation UI.
customizeNavigationUI();
// Enable voice audio guidance (through the device speaker).
mNavigator.setAudioGuidance(
Navigator.AudioGuidance.VOICE_ALERTS_AND_GUIDANCE);
// Simulate vehicle progress along the route for demo/debug builds.
if (BuildConfig.DEBUG) {
mNavigator.getSimulator().simulateLocationsAlongExistingRoute(
new SimulationOptions().speedMultiplier(5));
}
// Start turn-by-turn guidance along the current route.
mNavigator.startGuidance();
break;
// Handle error conditions returned by the navigator.
case NO_ROUTE_FOUND:
displayMessage("Error starting navigation: No route found.");
break;
case NETWORK_ERROR:
displayMessage("Error starting navigation: Network error.");
break;
case ROUTE_CANCELED:
displayMessage("Error starting navigation: Route canceled.");
break;
default:
displayMessage("Error starting navigation: "
+ String.valueOf(code));
}
}
});
}
/**
* Handles the result of the request for location permissions.
*/
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[],
@NonNull int[] grantResults) {
mLocationPermissionGranted = false;
switch (requestCode) {
case PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION: {
// If request is canceled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
mLocationPermissionGranted = true;
}
}
}
}
/**
* Shows a message on screen and in the log. Used when something goes wrong.
* @param errorMessage The message to display.
*/
private void displayMessage(String errorMessage) {
Toast.makeText(this, errorMessage, Toast.LENGTH_LONG).show();
Log.d(TAG, errorMessage);
}
}
private GoogleMap mMap;
// Get the map, and when the async call returns, setTrafficEnabled
// (callback will be on the UI thread)
mMap = mNavFragment.getMapAsync(navMap -> navMap.setTrafficEnabled(false));
// Force night mode on.
mNavFragment.setForceNightMode(FORCE_NIGHT);
显示路线列表
首先，创建视图并将其添加到层次结构中。
void setupDirectionsListView() {
// Create the view.
DirectionsListView directionsListView = new DirectionsListView(getApplicationContext());
// Add the view to your view hierarchy.
ViewGroup group = findViewById(R.id.directions_view);
group.addView(directionsListView);
// Add a button to your layout to close the directions list view.
ImageButton button = findViewById(R.id.close_directions_button); // this button is part of the container we hide in the next line.
button.setOnClickListener(
v -> findViewById(R.id.directions_view_container).setVisibility(View.GONE));
}
