我已经从此处https://docs.mapbox.com/android/navigation/examples/waypoint-navigation/实现了mapbox android waypoint导航示例，但改用我自己的位置开始。在OnCreate方法中，我从MainActivity传递位置和目的地。
当我设置SimulationRoute = true时，导航总是完美启动而没有延迟。但是，在大多数情况下，将SimulatorRoute = false设置为false时，导航屏幕会卡住（请参阅stuck screen），并且导航通常要花费1分钟以上的时间才能最终启动。启动时间有时从2秒到2分钟不等。如何加快导航的启动速度？
此错误可在其他设备上重现。互联网连接不是问题。
我相信，当NavigationView.startNavigation（navigationViewOptions）;时屏幕会卡住。被执行。但是由于控制台日志没有给我任何反馈，所以为什么卡住了 （或者至少我不理解）我真的不知道如何进行。
@SuppressLint("MissingPermission")
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
mDatabase = FirebaseDatabase.getInstance().getReference();
setTheme(R.style.Theme_AppCompat_NoActionBar);
super.onCreate(savedInstanceState);
//
Intent intent = getIntent();
Double driverDestinationLong = intent.getDoubleExtra("driverDestinationLong", 0);
Double driverDestinationLat = intent.getDoubleExtra("driverDestinationLat", 0);
driverDestinationPoint = Point.fromLngLat(driverDestinationLong, driverDestinationLat);
Double driverStartLong = intent.getDoubleExtra("driverStartLong",0);
Double driverStartLat = intent.getDoubleExtra("driverStartLat",0);
Point driverStartPoint = Point.fromLngLat(driverStartLong, driverStartLat);
// set default driverlocation as received through the intent
Double driverLocationLong = intent.getDoubleExtra("driverLocationLong",0);
Double driverLocationLat = intent.getDoubleExtra("driverLocationLat",0);
simulateRoute = intent.getBooleanExtra("simulateRoute", true);
recentDriverLocation = Point.fromLngLat(driverLocationLong, driverLocationLat);
points.add(driverStartPoint);
points.add(driverDestinationPoint);
Log.d("NavActivity","onCreate");
setContentView(R.layout.activity_navigation);
navigationView = findViewById(R.id.navigationView);
navigationView.onCreate(savedInstanceState);
navigationView.initialize(this);
user = FirebaseAuth.getInstance().getCurrentUser();
}
(...)
@Override
public void onNavigationReady(boolean isRunning) {
fetchRoute(points.remove(0), points.remove(0));
Log.d("NavActivity","onNavigationReady");
}
(...)
@Override
public void onProgressChange(Location location, RouteProgress routeProgress) {
lastKnownLocation = location;
Log.d("NavActivity","onProgressChange");
// TODO: start Progresschangelistener here to retreive Driver Location! or time remaining etc.
//send live driver coordinate to server here!
if (user != null) {
String uid = user.getUid();
// Define a listener that responds to location updates
/*String locationProvider = LocationManager.NETWORK_PROVIDER;*/
// Or use LocationManager.GPS_PROVIDER
/*Location lastKnownLocationFix = locationManager.getLastKnownLocation(locationProvider);
List<Double> list = Arrays.asList(lastKnownLocationFix.getLongitude(), lastKnownLocationFix.getLatitude());
mDatabase.child("DriverLocations").child(uid).setValue(list);*/
List<Double> list = Arrays.asList(location.getLongitude(), location.getLatitude());
mDatabase.child("DriverLocations").child(uid).setValue(list);
}
else {
// No user is signed in
Log.d("user:","no user signed in");
}
}
private void startNavigation(DirectionsRoute directionsRoute) {
Log.d("NavActivity","startNavigation");
NavigationViewOptions navigationViewOptions = setupOptions(directionsRoute);
navigationView.startNavigation(navigationViewOptions);
}
(...)
private void fetchRoute(Point origin, Point destination) {
Log.d("NavActivity","fetchRoutestarted");
NavigationRoute.builder(this)
.accessToken(Mapbox.getAccessToken())
.origin(origin)
.destination(destination)
.alternatives(true)
.build()
.getRoute(new Callback<DirectionsResponse>() {
@Override
public void onResponse(Call<DirectionsResponse> call, Response<DirectionsResponse> response) {
startNavigation(response.body().routes().get(0));
Log.d("NavActivity","fetchRouteOnRespone");
}
@Override
public void onFailure(Call<DirectionsResponse> call, Throwable throwable) {
Log.e("navifail", "Error: " + throwable.getMessage());
}
});
}
private NavigationViewOptions setupOptions(DirectionsRoute directionsRoute) {
Log.d("NavActivity","NavigationViewOptions");
dropoffDialogShown = false;
NavigationViewOptions.Builder options = NavigationViewOptions.builder();
options.directionsRoute(directionsRoute)
.navigationListener(this)
.progressChangeListener(this)
.routeListener(this)
.shouldSimulateRoute(simulateRoute);
return options.build();
}
我希望导航立即启动，不会延迟。实际结果是，在导航启动之前，大部分时间屏幕停留在1分钟以上。
控制台日志中有趣的部分是（23:16:07-23:17:10）。屏幕和控制台日志在那里暂停一分钟，直到它们继续。也许locationupdatespendingintent有问题？
2019-07-11 23：16：06.940 29275-29275 / com..carcombo I / TextToSpeech：已成功绑定到com.google.android.tts 2019-07-11 23：16：07.113 29275-29275 / com..carcombo D / Nav活动： fetchRouteOnRespone 2019-07-11 23：16：07.117 29275-29275 / com..carcombo I / TextToSpeech：已连接至 ComponentInfo {com.google.android.tts / com.google.android.tts.service.GoogleTTSService} 2019-07-11 23：16：07.163 29275-30794 / com..carcombo I / TextToSpeech：建立与 ComponentInfo {com.google.android.tts / com.google.android.tts.service.GoogleTTSService} 2019-07-11 23：16：07.539 29275-29275 / com..carcombo I / zygote64： 显式并发复制GC释放了93886（8MB）AllocSpace对象， 47（1952KB）LOS对象，50％空闲，14MB / 28MB，总共暂停250us 398.928ms 2019-07-11 23：16：07.980 29275-29275 / com.carcarbo I / zygote64：显式并发复制GC已释放104026（8MB） AllocSpace对象，0（0B）个LOS对象，57％空闲，8MB / 20MB，已暂停 207us总159.533ms 2019-07-11 23：16：07.981 29275-29291 / com..carcombo I / zygote64：WaitForGcToComplete 在HeapTrim上阻止HeapTrim持续140.899毫秒2019-07-11 23：17：10.223 29275-29275 / com..carcombo D / LoadedApk： ZTEPOINT_BR_STATS |完成 注册：com.mapbox.android.telemetry.location.LocationUpdatesBroadcastReceiver@9157e26 |用于 意图 com.mapbox.android.telemetry.location.locationupdatespendingintent.action.LOCATION_UPDATED | mRegistered = true | mOrderedHint = true | cost：2 2019-07-11 23：17：10.282 29275-29275 / com..carcombo W / StaticLayout：maxLineHeight不应为-1。 maxLines：2 lineCount：2 2019-07-11 23：17：10.284 29275-29275 / com..carcombo W / StaticLayout：maxLineHeight不应为-1。 maxLines：2 lineCount：2 2019-07-11 23：17：10.285 29275-29275 / com..carcombo W / StaticLayout：maxLineHeight不应为-1。 maxLines：2 lineCount：2 2019-07-11 23：17：10.287 29275-29275 / com..carcombo W / StaticLayout：maxLineHeight不应为-1。 maxLines：2 lineCount：2 2019-07-11 23：17：10.319 29275-29275 / com..carcombo D /驱动程序位置值:: DataSnapshot {键= 0，值= 13.2971212} 2019-07-11 23：17：10.550 29275-30810 / com..carcombo W / Mbgl-HttpRequest：由于永久错误，请求失败：已取消 2019-07-11 23：17：10.588 29275-30905 / com..carcombo W / Mbgl-HttpRequest：由于永久错误，请求失败：已取消 2019-07-11 23：17：10.600 29275-30903 / com..carcombo W / Mbgl-HttpRequest：由于永久错误，请求失败：已取消