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Googleマップを使用して簡単なナビゲーションアプリを実装しようとしています。最初は地図上に2つのジオ点をマーキングし、それらの間のルートを表示するコードを開発しました。今私は、ユーザーの場所に基づいて、2番目のマーカー（目的地）に向かって最初のマーカーを移動しようとしています。 私の最初のマーカはデバイスの場所で、2番目のマーカはapiを通してdbから取得されます。Androidで場所が変更されたときにマーカーを継続的に更新していません -
これに対して、私はLocationListenerを使用し、onLocationChangedにコードを実装しました。問題は、onLocationChangedが発生しておらず、マーカーがユーザーの場所に基づいて移動していないことです.Markerは毎回アプリを読み込む際にのみ移動します。 ここに私のコードです。
public class MainActivity extends FragmentActivity implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
private GoogleMap mMap;
ArrayList<LatLng> MarkerPoints = new ArrayList<>();
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker1,mCurrLocationMarker2;
LocationRequest mLocationRequest;
FrameLayout mainFrameLayout;
Snackbar snackbar;
private static final int PERMISSIONS_REQUEST_READ_PHONE_STATE = 1;
String stringIMEI = "",stringLatitudeOrigin = "",stringLongitudeOrigin = "",
stringLatitudeDest = "",stringLongitudeDest = "",stringCurrentDate = "";
SharedPreferences sharedPreferences;
@TargetApi(Build.VERSION_CODES.N)
@RequiresApi(api = Build.VERSION_CODES.M)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
sharedPreferences = getSharedPreferences("sharedPreferences", Context.MODE_PRIVATE);
Calendar c = Calendar.getInstance();
System.out.println("Current time => "+c.getTime());
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
stringCurrentDate = df.format(c.getTime());
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(map);
mapFragment.getMapAsync(this);
mainFrameLayout = (FrameLayout)findViewById(R.id.mainFrameLayout);
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkLocationPermission();
}
if (ContextCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.READ_PHONE_STATE)
!= PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{android.Manifest.permission.READ_PHONE_STATE},
PERMISSIONS_REQUEST_READ_PHONE_STATE);
}else {
TelephonyManager mngr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
stringIMEI = mngr.getDeviceId().toString();
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
}
else {
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
if (checkLocationPermission()) {
mMap.setMyLocationEnabled(true);
mMap.setTrafficEnabled(false);
mMap.setIndoorEnabled(false);
mMap.setBuildingsEnabled(true);
mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.moveCamera(CameraUpdateFactory.newCameraPosition(new CameraPosition.Builder()
.target(mMap.getCameraPosition().target).zoom(17).bearing(30).tilt(45).build()));
}
}
private String getUrl(LatLng origin, LatLng dest) {
String str_origin = "origin=" + origin.latitude + "," + origin.longitude;
String str_dest = "destination=" + dest.latitude + "," + dest.longitude;
String key = "key=AIzaSyDkuXKvLCxtKs1jkXRXyt5Kk1Qv3fUe7mU";
String parameters = str_origin + "&" + str_dest + "&" + key;//+ waypoints + "&"
String output = "json";
String url = "https://maps.googleapis.com/maps/api/directions/" + output + "?" + parameters;
return url;
}
private class FetchUrl extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... url) {
// TODO Auto-generated method stub
String data = "";
try {
HttpConnection http = new HttpConnection();
data = http.downloadUrl(url[0]);
} catch (Exception e) {
// TODO: handle exception
Log.d("Background Task", e.toString());
}
return data;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
new ParserTask().execute(result);
}
}
private class ParserTask extends AsyncTask<String, Integer, List<List<HashMap<String, String>>>> {
// Parsing the data in non-ui thread
@Override
protected List<List<HashMap<String, String>>> doInBackground(
String... jsonData) {
// TODO Auto-generated method stub
JSONObject jObject;
List<List<HashMap<String, String>>> routes = null;
try {
jObject = new JSONObject(jsonData[0]);
if (!jObject.equals("")){
//save route api call
SaveRouteVolleyRequest(jObject.toString());
}
DirectionsJSONParser parser = new DirectionsJSONParser();
routes = parser.parse(jObject);
} catch (Exception e) {
e.printStackTrace();
}
return routes;
}
// Executes in UI thread, after the parsing process
@Override
protected void onPostExecute(List<List<HashMap<String, String>>> result) {
ArrayList<LatLng> points = new ArrayList<LatLng>();
PolylineOptions lineOptions = new PolylineOptions();
lineOptions.width(8);
lineOptions.color(Color.RED);
MarkerOptions markerOptions = new MarkerOptions();
// Traversing through all the routes
for(int i=0;i<result.size();i++){
// Fetching i-th route
List<HashMap<String, String>> path = result.get(i);
// Fetching all the points in i-th route
for(int j=0;j<path.size();j++){
HashMap<String,String> point = path.get(j);
double lat = Double.parseDouble(point.get("lat"));
double lng = Double.parseDouble(point.get("lng"));
LatLng position = new LatLng(lat, lng);
points.add(position);
}
// Adding all the points in the route to LineOptions
lineOptions.addAll(points);
}
// Drawing polyline in the Google Map for the i-th route
if(points.size()!=0)mMap.addPolyline(lineOptions);
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
@Override
public void onConnected(Bundle bundle) {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setExpirationDuration(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setSmallestDisplacement(0.1f);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
@Override
public void onConnectionSuspended(int i) { }
@Override
public void onLocationChanged(Location location) {
mLastLocation = location;
mMap.clear();
if (mCurrLocationMarker1 != null) {
mCurrLocationMarker1.remove();
}
//Place current location marker
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
stringLatitudeOrigin = String.valueOf(location.getLatitude());
stringLongitudeOrigin = String.valueOf(location.getLongitude());
mCurrLocationMarker1 = mMap.addMarker(new MarkerOptions().position(latLng).title("Your device").draggable(true)
.visible(true).icon(BitmapDescriptorFactory.fromResource(R.drawable.marker)).anchor(0.5f, 0.5f));
if (isConnectingToInternet(MainActivity.this) == true) {
GetLocationVolleyRequest();
}else{snackbar = Snackbar.make(mainFrameLayout, "No Internet Connection,Please Verify", Snackbar.LENGTH_LONG);
snackbar.show();
}
//move map camera
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,13.0f));
//stop location updates
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) { }
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
public boolean checkLocationPermission(){
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)) {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
} else {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
}
return false;
} else {
return true;
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION: {
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
mMap.setMyLocationEnabled(true);
mMap.setTrafficEnabled(false);
mMap.setIndoorEnabled(false);
mMap.setBuildingsEnabled(true);
mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.moveCamera(CameraUpdateFactory.newCameraPosition(new CameraPosition.Builder()
.target(mMap.getCameraPosition().target).zoom(17).bearing(30).tilt(45).build()));
}
}else {
snackbar = Snackbar.make(mainFrameLayout, "permission denied", Snackbar.LENGTH_LONG);
snackbar.show();
}
return;
}
case PERMISSIONS_REQUEST_READ_PHONE_STATE : {
if (requestCode == PERMISSIONS_REQUEST_READ_PHONE_STATE
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
TelephonyManager mngr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
stringIMEI = mngr.getDeviceId().toString();
}else {
snackbar = Snackbar.make(mainFrameLayout, "permission denied", Snackbar.LENGTH_LONG);
snackbar.show();
}
}
}
}
public void GetLocationVolleyRequest(){
StringRequest stringRequest = new StringRequest(Request.Method.POST, Constants.LOCATIONAPI_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject json = new JSONObject(response);
if (json.getString("success").equals("1")) {
if (json.has("id")) {
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString("device_id", json.getString("id"));
editor.commit();
}else {
snackbar = Snackbar.make(mainFrameLayout, json.getString("msg"), Snackbar.LENGTH_LONG);
snackbar.getView().setBackgroundColor(R.color.colorPrimaryDark);
TextView mainTextView = (TextView) (snackbar.getView()).findViewById(android.support.design.R.id.snackbar_text);
mainTextView.setTextColor(Color.WHITE);
snackbar.show();
}
if (json.has("latitude")) {
stringLatitudeDest = json.getString("latitude");
stringLongitudeDest = json.getString("longitude");
snackbar = Snackbar.make(mainFrameLayout, "Other Device -> Lat : " + stringLatitudeDest + " Lng : " +
stringLongitudeDest, Snackbar.LENGTH_LONG);
snackbar.getView().setBackgroundColor(R.color.colorPrimaryDark);
TextView mainTextView = (TextView) (snackbar.getView()).findViewById(android.support.design.R.id.snackbar_text);
mainTextView.setTextColor(Color.WHITE);
snackbar.show();
mCurrLocationMarker2 = mMap.addMarker(new MarkerOptions().position(new LatLng(Double.parseDouble(stringLatitudeDest),
Double.parseDouble(stringLongitudeDest))).title("Other device").icon(BitmapDescriptorFactory.fromResource(R.drawable.marker)));
MarkerPoints.add(new LatLng(Double.parseDouble(stringLatitudeOrigin), Double.parseDouble(stringLongitudeOrigin)));
MarkerPoints.add(new LatLng(Double.parseDouble(stringLatitudeDest), Double.parseDouble(stringLongitudeDest)));
if (MarkerPoints.size() >= 2) {
LatLng origin = MarkerPoints.get(0);
LatLng dest = MarkerPoints.get(1);
// Getting URL to the Google Directions API
String url = getUrl(origin, dest);
Log.d("onMapClick", url.toString());
FetchUrl fetchUrl = new FetchUrl();
// Start downloading json data from Google Directions API
fetchUrl.execute(url);
//move map camera
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(origin, 14.0f));
}
}
}else {
snackbar = Snackbar.make(mainFrameLayout, "No Co-ordinates due to"+json.getString("msg"), Snackbar.LENGTH_LONG);
snackbar.getView().setBackgroundColor(R.color.colorPrimaryDark);
TextView mainTextView = (TextView) (snackbar.getView()).findViewById(android.support.design.R.id.snackbar_text);
mainTextView.setTextColor(Color.WHITE);
snackbar.show();
}
}catch (JSONException je){
je.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
snackbar = Snackbar.make(mainFrameLayout, error.toString(), Snackbar.LENGTH_LONG);
snackbar.getView().setBackgroundColor(R.color.colorPrimaryDark);
TextView mainTextView = (TextView) (snackbar.getView()).findViewById(android.support.design.R.id.snackbar_text);
mainTextView.setTextColor(Color.WHITE);
snackbar.show();
}
}){
@Override
protected Map<String,String> getParams(){
String stringDeviceModel = Build.MODEL;
String stringDeviceSeries = Build.SERIAL;
String stringDeviceOS = Build.VERSION.RELEASE;
Map<String,String> params = new HashMap<String, String>();
params.put("imei",stringIMEI);
params.put("model",stringDeviceModel);
params.put("series",stringDeviceSeries);
params.put("os",stringDeviceOS);
params.put("latitude",stringLatitudeOrigin);
params.put("longitude",stringLongitudeOrigin);
params.put("datetime",stringCurrentDate);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
public void SaveRouteVolleyRequest(String route){
final String paramRoute = route;
StringRequest stringRequest = new StringRequest(Request.Method.POST, Constants.SAVEROUTEAPI_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject json = new JSONObject(response);
if (json.getString("success").equals("1")) {
snackbar = Snackbar.make(mainFrameLayout, json.getString("msg"), Snackbar.LENGTH_LONG);
snackbar.getView().setBackgroundColor(R.color.colorPrimaryDark);
TextView mainTextView = (TextView) (snackbar.getView()).findViewById(android.support.design.R.id.snackbar_text);
mainTextView.setTextColor(Color.WHITE);
snackbar.show();
}else {
snackbar = Snackbar.make(mainFrameLayout,"No Co-ordinates due to"+json.getString("msg"), Snackbar.LENGTH_LONG);
snackbar.getView().setBackgroundColor(R.color.colorPrimaryDark);
TextView mainTextView = (TextView) (snackbar.getView()).findViewById(android.support.design.R.id.snackbar_text);
mainTextView.setTextColor(Color.WHITE);
snackbar.show();
}
}catch (JSONException je){
je.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
snackbar = Snackbar.make(mainFrameLayout, error.toString(), Snackbar.LENGTH_LONG);
snackbar.getView().setBackgroundColor(R.color.colorPrimaryDark);
TextView mainTextView = (TextView) (snackbar.getView()).findViewById(android.support.design.R.id.snackbar_text);
mainTextView.setTextColor(Color.WHITE);
snackbar.show();
}
}){
@Override
protected Map<String,String> getParams(){
Map<String,String> params = new HashMap<String, String>();
params.put("device_id",sharedPreferences.getString("device_id",""));
params.put("route",paramRoute);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
public boolean isConnectingToInternet(Context context){
ConnectivityManager connectivity=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null)
{
NetworkInfo info[]=connectivity.getAllNetworkInfo();
if(info!=null)
{
for(int i=0;i<info.length;i++)
if(info[i].getState()== NetworkInfo.State.CONNECTED)
return true;
}
}
return false;
}
}
入力していただきありがとうございます。 – Shivani