我有两个疑问
- 使用Google Maps时如何计算用户行驶的距离？
就像出租车应用程序如何计算距离一样，现在让我深入解释我的问题，我有checkin和在地图中查看按钮时，当用户单击"检查"按钮时，我将在当时我将确切的LAT和该用户的long在用户结帐，我将从他退房的地方获取LAT，然后将此源的Latlong和Destination Latlong发送到Google API之后，这将返回公里。但是我需要的是他无论旅行到哪里
- 我的第二个疑问是我的Google地图花了很长时间才能在地图中绘制蓝色标记，显示了在通知栏中搜索GPS的信息？
下面是我的完整代码
访问travel.java
public class VisitTravel extends FragmentActivity implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
private List < LatLng > obj;
private GoogleMap mGoogleMap;
private Double latitue, longtitue, Start_lat, Start_long;
private SupportMapFragment mapFrag;
private LocationRequest mLocationRequest;
private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
private ImageView cancel_bottomsheet;
protected static final int REQUEST_CHECK_SETTINGS = 0x1;
private Bundle bundle;
private ProgressDialog progressDialog;
private String Checkin, parsedDistance, duration, JsonResponse;
private VisitDAO visitDAO;
private Long primaryID;
private ArrayList < LatLng > points;
private Integer id, flag, incidentid, userid;
private TextView heading, duration_textview, dot_source, destination, distance;
private PowerManager.WakeLock wakeLock;
private BottomSheetBehavior bottomSheetBehavior;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_visit_travel);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
mapFrag = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFrag.getMapAsync(this);
InternetCheck internetCheck = new InternetCheck();
boolean check = internetCheck.isNetworkAvailable(VisitTravel.this);
if (!check) {
showAlertDialog();
} else {
createLocationRequest();
buildGoogleApiClient();
Settingsapi();
progressDialog = new ProgressDialog(VisitTravel.this);
// polylineOptions = new PolylineOptions();
cancel_bottomsheet = (ImageView) findViewById(R.id.cancel);
heading = (TextView) findViewById(R.id.heading);
dot_source = (TextView) findViewById(R.id.dot_source);
distance = (TextView) findViewById(R.id.distance);
duration_textview = (TextView) findViewById(R.id.duration);
destination = (TextView) findViewById(R.id.destination);
progressDialog.setMessage("Fetching Location Updates");
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progressDialog.show();
View bottomSheet = findViewById(R.id.bottom_sheet);
LoginDAO loginobj = new LoginDAO(this);
userid = loginobj.getUserID();
bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
cancel_bottomsheet.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
}
});
bundle = getIntent().getExtras();
if (bundle != null) {
flag = bundle.getInt("flag");
latitue = bundle.getDouble("destination_lat");
longtitue = bundle.getDouble("destination_long");
incidentid = bundle.getInt("incidentid");
if (flag == 1) {
} else {
// time = bundle.getString("checkin");
id = bundle.getInt("id");
incidentid = bundle.getInt("incidentid");
Start_lat = bundle.getDouble("lat");
Checkin = bundle.getString("checkin");
Start_long = bundle.getDouble("long");
String address = bundle.getString("startaddress");
String distance = bundle.getString("estimateddistance");
setBottomSheet(address, distance);
}
}
obj = new ArrayList < > ();
final FloatingActionButton startfab = (FloatingActionButton) findViewById(R.id.start);
final FloatingActionButton stopfab = (FloatingActionButton) findViewById(R.id.stopfab);
PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
"WakelockTag");
wakeLock.acquire();
visitDAO = new VisitDAO(getApplicationContext());
if (flag == 2) {
startfab.setVisibility(View.INVISIBLE);
}
startfab.setBackgroundResource(R.drawable.ic_play_circle_outline_black_24dp);
final SharedPreferences preferences = getSharedPreferences("lat_long", Context.MODE_PRIVATE);
startfab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mLastLocation != null) {
String checkin_to_server = dateFormat.format(new Date());
Date date = null;
try {
date = dateFormat.parse(checkin_to_server);
} catch (ParseException e) {
e.printStackTrace();
}
String checkin_view = dateview.format(date);
double startinglat = mLastLocation.getLatitude();
double startinglong = mLastLocation.getLongitude();
// String addres=address(startinglat,startinglong);
String jsonresponse = null;
try {
jsonresponse = new GetDistance().execute(startinglat, startinglong, 12.951601, 80.184641).get();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
ParserTask parserTask = new ParserTask();
if (jsonresponse != null) {
Log.d("responsejson", jsonresponse);
parserTask.execute(jsonresponse);
}
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(jsonresponse);
} catch (JSONException e) {
e.printStackTrace();
}
//Here il save the userlocation in db
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Toast.makeText(getApplicationContext(), "Please Wait Till We Recieve Location Updates", Toast.LENGTH_SHORT).show();
}
}
});
stopfab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mLastLocation != null) {
double lat = mLastLocation.getLatitude();
double longt = mLastLocation.getLongitude();
String startlat = preferences.getString("startlat", "");
Log.d("startlat", startlat);
String startlong = preferences.getString("startlong", "");
// Calculating distance
String distance = getKilometer(Double.valueOf(startlat), Double.valueOf(startlong), lat, longt);
Intent intent = new Intent(VisitTravel.this, IncidentView.class);
setResult(RESULT_OK, intent);
finish();
} else {
Toast.makeText(getApplicationContext(), "Please Wait Fetching Location", Toast.LENGTH_SHORT).show();
}
}
});
}
}
@Override
public void onStart() {
super.onStart();
Log.d("start", "onStart fired ..............");
mGoogleApiClient.connect();
}
private void showAlertDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(VisitTravel.this);
builder.setTitle("Network Connectivity")
.setMessage("Please Check Your Network Connectivity")
.setCancelable(false)
.setNegativeButton("Close", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(getApplicationContext(), IncidentView.class);
setResult(RESULT_OK, intent);
finish();
}
});
AlertDialog alert = builder.create();
alert.show();
}
@Override
public void onPause() {
super.onPause();
// progressDialog.dismiss();
if (wakeLock.isHeld()) {
wakeLock.release();
}
//stop location updates when Activity is no longer active
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
mGoogleApiClient.disconnect();
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
map_marker_End(12.951601, 80.184641, "Destination");
if (flag == 2) {
map_marker_start(Start_lat, Start_long, Checkin);
}
//Initialize Google Play Services
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION) ==
PackageManager.PERMISSION_GRANTED) {
//Location Permission already granted
createLocationRequest();
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
} else {
//Request Location Permission
checkLocationPermission();
}
} else {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
mGoogleApiClient.connect();
}
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000 * 10);
mLocationRequest.setFastestInterval(1000 * 5);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
@Override
public void onConnected(Bundle bundle) {
startLocationUpdates();
}
protected void startLocationUpdates() {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
Toast.makeText(this, "LocationNotUpdated", Toast.LENGTH_SHORT).show();
ActivityCompat.requestPermissions(VisitTravel.this,
new String[] {
android.Manifest.permission
.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION
},
20);
} else {
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
Log.d("Loc", "Location update started ..............: ");
// Toast.makeText(this, "LocationUpdatedStart", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onConnectionSuspended(int i) {}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
public void map_marker_start(Double lat, Double longt, String title) {
MarkerOptions markerOptions = new MarkerOptions();
LatLng latLng = new LatLng(lat, longt);
Log.d("lat", String.valueOf(latLng.longitude));
markerOptions.position(latLng);
markerOptions.title(title);
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
mGoogleMap.addMarker(markerOptions).showInfoWindow();
}
public void map_marker_End(Double lat, Double longt, String title) {
final MarkerOptions markerOptions_end = new MarkerOptions();
LatLng latLng = new LatLng(lat, longt);
Log.d("lat", String.valueOf(latLng.longitude));
markerOptions_end.position(latLng);
markerOptions_end.title(title);
markerOptions_end.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
mGoogleMap.addMarker(markerOptions_end).showInfoWindow();
mGoogleMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
@Override
public boolean onMarkerClick(Marker marker) {
String title = marker.getTitle();
if (title.equals("Destination")) {
dot_source.setText("u2022");
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
heading.setText("TEST");
duration_textview.setText("Duration:" + " " + duration);
return true;
} else {
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
return true;
}
}
});
}
@Override
public void onLocationChanged(Location location) {
mLastLocation = location;
PolylineOptions polylineOptions = new PolylineOptions();
Log.d("location", mLastLocation.toString());
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
obj.add(latLng);
polylineOptions.addAll(obj);
polylineOptions.width(9);
polylineOptions.color(Color.parseColor("#2196f3"));
mGoogleMap.addPolyline(polylineOptions);
progressDialog.dismiss();
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(
latLng, 12);
mGoogleMap.animateCamera(cameraUpdate);
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
private void checkLocationPermission() {
if (ContextCompat.checkSelfPermission(VisitTravel.this, android.Manifest.permission.ACCESS_FINE_LOCATION) !=
PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
android.Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
new AlertDialog.Builder(this)
.setTitle("Location Permission Needed")
.setMessage("This app needs the Location permission, please accept to use location functionality")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(VisitTravel.this,
new String[] {
android.Manifest.permission.ACCESS_FINE_LOCATION
},
MY_PERMISSIONS_REQUEST_LOCATION);
}
})
.create()
.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[] {
android.Manifest.permission.ACCESS_FINE_LOCATION
},
MY_PERMISSIONS_REQUEST_LOCATION);
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION:
{
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 &&
grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// location-related task you need to do.
if (ContextCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION) ==
PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
createLocationRequest();
/// buildGoogleApiClient();
// Settingsapi();
mGoogleMap.setMyLocationEnabled(true);
}
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
public String getKilometer(final double lat1, final double lon1, final double lat2, final double lon2) {
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
URL url = new URL("http://maps.googleapis.com/maps/api/directions/json?origin=" + lat1 + "," + lon1 + "&destination=" + lat2 + "," + lon2 + "&sensor=false&units=metric&mode=driving");
final HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
InputStream in = new BufferedInputStream(conn.getInputStream());
StringBuilder buffer = new StringBuilder();
BufferedReader reader = null;
reader = new BufferedReader(new InputStreamReader( in ));
String inputLine;
while ((inputLine = reader.readLine()) != null)
buffer.append(inputLine + "n");
if (buffer.length() == 0) {
// Stream was empty. No point in parsing.
Log.e("empty", "empty");
}
JsonResponse = buffer.toString();
Log.d("response", JsonResponse);
JSONObject jsonObject = new JSONObject(JsonResponse);
JSONArray array = jsonObject.getJSONArray("routes");
JSONObject routes = array.getJSONObject(0);
JSONArray legs = routes.getJSONArray("legs");
JSONObject steps = legs.getJSONObject(0);
JSONObject distance = steps.getJSONObject("distance");
parsedDistance = distance.getString("text");
} catch (ProtocolException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
}
});
thread.start();
try {
thread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
return parsedDistance;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
// Check for the integer request code originally supplied to startResolutionForResult().
case REQUEST_CHECK_SETTINGS:
switch (resultCode) {
case Activity.RESULT_OK:
startLocationUpdates();
break;
case Activity.RESULT_CANCELED:
Intent intent = new Intent(this, Incident.class);
startActivity(intent);
break;
}
break;
}
}
@Override
protected void onStop() {
super.onStop();
if (wakeLock.isHeld()) {
wakeLock.release();
}
}
@Override
public void onBackPressed() {
super.onBackPressed();
Intent intent = new Intent(this, IncidentView.class);
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
mGoogleApiClient.disconnect();
}
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
setResult(RESULT_OK, intent);
finish();
}
}
搜索了很多，没有得到适当的开始方式？任何帮助真的很有价值。
- 谢谢！
这对我有用：
定期捕获纬度和经度。计算并汇总每个存储值之间的距离。