GoogleマップでGPSを使用してマーカーを移動するandroid
gpsの位置をUBERアプリのように変更しながら、_GOOGLE MAP_でマーカーを移動したい。いくつかの解決策を見つけましたが、問題を解決できません。ソリューションは 1 および 2 です
以下は私のonLocationChange()メソッドです
_public void onLocationChanged(Location location) {
double lattitude = location.getLatitude();
double longitude = location.getLongitude();
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
//Place current location marker
LatLng latLng = new LatLng(lattitude, longitude);
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("I am here");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
tv_loc.append("Lattitude: " + lattitude + " Longitude: " + longitude);
//move map camera
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(15));
//stop location updates
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
_Update 1（再編集）
理解を深めるために、さらにコードを追加していますが、最初にアプリでタブを使用していることを伝えたいと思います。最初のtabは私のマップのものです。だから私はそれのためにフラグメントを使用しています。
_public class MyLocation extends Fragment implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener,
LocationListener{
GoogleMap mGoogleMap;
SupportMapFragment mapFrag;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker=null;
TextView tv_loc;
private static View view;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if(view != null)
{
ViewGroup viewGroupParent = (ViewGroup)view.getParent();
if(viewGroupParent !=null)
{
viewGroupParent.removeView(viewGroupParent);
}
}
try{
view = inflater.inflate(R.layout.my_location,container, false);
}catch (Exception e)
{
/* map is already there, just return view as it is */
return view;
}
// inflat and return the layout
//View rootView = inflater.inflate(R.layout.my_location, container, false);
tv_loc = (TextView)view.findViewById(R.id.textView);
mapFrag = (SupportMapFragment)getChildFragmentManager().findFragmentById(R.id.map);
mapFrag.getMapAsync(this);
return view;
}
@Override
public void onPause() {
super.onPause();
//stop location updates when Activity is no longer active
if(mGoogleApiClient !=null)
{
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap=googleMap;
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
//Initialize Google Play Services
if (Android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
//Location Permission already granted
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
} else {
//Request Location Permission
checkLocationPermission();
}
}
else {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
@Override
public void onConnected(Bundle bundle) {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if (ContextCompat.checkSelfPermission(getActivity(),
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) {
double lattitude = location.getLatitude();
double longitude = location.getLongitude();
//Place current location marker
LatLng latLng = new LatLng(lattitude, longitude);
if(mCurrLocationMarker!=null){
mCurrLocationMarker.setPosition(latLng);
}else{
mCurrLocationMarker = mGoogleMap.addMarker(new MarkerOptions()
.position(latLng)
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED))
.title("I am here"));
}
tv_loc.append("Lattitude: " + lattitude + " Longitude: " + longitude);
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 15));
//stop location updates
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
/*double lattitude = location.getLatitude();
double longitude = location.getLongitude();
mLastLocation = location;
if (mCurrLocationMarker != null) {
//mGoogleMap.clear();
mCurrLocationMarker.remove();
}
//Place current location marker
LatLng latLng = new LatLng(lattitude, longitude);
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("I am here");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)).draggable(true);
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
mCurrLocationMarker.setPosition(new LatLng(lattitude,longitude));
tv_loc.append("Lattitude: " + lattitude + " Longitude: " + longitude);
//move map camera
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(15));
//stop location updates
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}*/
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
private void checkLocationPermission() {
if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(),
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(getActivity())
.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(getActivity(),
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
})
.create()
.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(getActivity(),
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
/*super.onRequestPermissionsResult(requestCode, permissions, 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(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED)
{
if(mGoogleApiClient == null)
{
buildGoogleApiClient();
}
mGoogleMap.setMyLocationEnabled(true);
}
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
//finish();
Toast.makeText(getActivity(), "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
@Override
public void onResume()
{
super.onResume();
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public void onLowMemory() {
super.onLowMemory();
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}}
_どんな助けでも大歓迎です
以下のコードを使用して、マーカーの位置を更新できます
public void onLocationChanged(Location location) {
double lattitude = location.getLatitude();
double longitude = location.getLongitude();
//Place current location marker
LatLng latLng = new LatLng(lattitude, longitude);
if(mCurrLocationMarker!=null){
mCurrLocationMarker.setPosition(latLng);
}else{
mCurrLocationMarker = mGoogleMap.addMarker(new MarkerOptions()
.position(latLng)
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED))
.title("I am here");
}
tv_loc.append("Lattitude: " + lattitude + " Longitude: " + longitude);
gMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 15));
//stop location updates
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
毎回マップをクリアする必要はありません。これは、マーカーをマップに追加するときに返されるMarkerオブジェクトによって実行できます。それがあなたを助けることを願っています。
まず、アクティビティにLocationListenerを実装し、次に
マーカーを1つだけ表示する必要がある場合（マーカーの位置を更新）、これを使用します。
private Marker currentPositionMarker = null;
@Override
public void onLocationChanged(Location location) {
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(latLng).zoom(14).build();
// mMap.clear(); // Call if You need To Clear Map
if (currentPositionMarker == null)
currentPositionMarker = mMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW))
.position(latLng)
.zIndex(20));
else
currentPositionMarker.setPosition(latLng);
mMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
}
または、毎回新しいマーカーを追加する場合：
@Override
public void onLocationChanged(Location location) {
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(latLng).zoom(14).build();
mMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW))
.position(latLng)
.zIndex(20));
mMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
}
場所が急速に変更された場合、アプリが場所マーカーを更新するのに数秒かかる
これを使って：
LocationListener ,GoogleMap.OnMyLocationChangeListenerマップアクティビティで、場所変更リスナーを使用します
@Override
public void onMyLocationChange(Location location) {
//mMap.clear //if you want refresh map remove comment
// Getting latitude of the current location
double latitude = location.getLatitude();
// Getting longitude of the current location
double longitude =location.getLongitude();
// Creating a LatLng object for the current location
LatLng latLng = new LatLng(latitude, longitude); //your_text_view.settext(latitude+","+longtitudde)
// Showing the current location in Google Map
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.addMarker(new MarkerOptions().icon(BitmapDescriptorFactory.fromResource(R.drawable.destination_marker)).position(latLng).title(maping_status));
// Zoom in the Google Map
mMap.animateCamera(CameraUpdateFactory.zoomTo(20));
}
アニメーション化するために、前の場所と新しい場所をマーカーオブジェクトと共にこのメソッド（animateMarker）を呼び出すだけです
private Marker mCurrentMarker;
private float ZOOMLEVEL=18.0f;
private LatLng previousLatLon;
private Handler mLocalHandler;
private GoogleMap mGoogleMap;
public void animateMarker(final Marker marker, final LatLng toPosition,final LatLng fromPosition) {
final long duration = 500;
final Interpolator interpolator = new LinearInterpolator();
mLocalHandler.post(new Runnable() {
@Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - mStartTime;
float t = interpolator.getInterpolation((float) elapsed
/ duration);
marker.setPosition(toPosition);
marker.setAnchor(Constants.MAPANCHOR, Constants.MAPANCHOR);
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(toPosition, ZOOMLEVEL));
if (t < 1.0) {
// Post again 16ms later.
mLocalHandler.postDelayed(this, 16);
} else {
marker.setVisible(true);
}
}
}
});
previousLatLon=toPosition;// reassign the previous location to current location
}
それでも解決策を探している場合は、これが https://www.youtube.com/watch?v=WKfZsCKSXVQ に役立つことを願っています。私は自分のアプリの1つでこれを使用しており、マーカーをある場所から別の場所にアニメーション化するのに役立ちます。ソースコードはここで入手できます https://Gist.github.com/broady/6314689 。
マーカーの正確な方向を示すために、マーカーに回転を追加する必要がある場合があります。以下は、方位を見つけるために使用しているコードのブロックです。
private float bearingBetweenLatLngs(LatLng begin, LatLng end) {
Location beginL = convertLatLngToLocation(begin);
Location endL = convertLatLngToLocation(end);
return beginL.bearingTo(endL);
}
マニフェストでこれらの行を追加します
<uses-permission Android:name="Android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission Android:name="Android.permission.ACCESS_COARSE_LOCATION"/>
そして、このクラスを使用します
public class MainActivity extends AppCompatActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
GoogleMap mgoogleMap;
GoogleApiClient mgoogleApi;
Context context;
Marker marker;
LocationRequest locationrequest;
public static final int map=1111;
public static final int coarse=1112;
@Override
protected void onCreate(Bundle savedInstanceState) {
if (googleServiceAvalable()) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = getApplicationContext();
checkReadPermission();
checkCoarsePermission();
initMap();
} else {
}
}
public boolean googleServiceAvalable() {
GoogleApiAvailability api = GoogleApiAvailability.getInstance();
int isavailable = api.isGooglePlayServicesAvailable(this);
if (isavailable == ConnectionResult.SUCCESS) {
return true;
} else if (api.isUserResolvableError(isavailable)) {
Dialog dialog = api.getErrorDialog(this, isavailable, 0);
dialog.show();
} else {
Toast.makeText(this, "cant connect to play services", Toast.LENGTH_LONG).show();
}
return false;
}
private void initMap() {
MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.fragment);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mgoogleMap = googleMap;
if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.M){
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
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
}
mgoogleMap.setMyLocationEnabled(true);
if(checkCoarsePermission() && checkReadPermission()){
mgoogleApi = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
mgoogleApi.connect();
}else {
checkReadPermission();
checkCoarsePermission();
}
}
private void goToLocation(double latitude, double longitude, int i) {
LatLng ll = new LatLng(latitude, longitude);
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(ll, i);
mgoogleMap.animateCamera(update);
if(marker !=null){
marker.remove();
}
MarkerOptions options =new MarkerOptions()
.title("Test")
.draggable(true)
.position(new LatLng(latitude,longitude ));
marker= mgoogleMap.addMarker(options);
}
@Override
public void onConnected(@Nullable Bundle bundle) {
locationrequest = new LocationRequest().create();
locationrequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationrequest.setInterval(1000);
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
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(mgoogleApi, locationrequest, this);
Toast.makeText(context,"Location Connected and ready to publish",Toast.LENGTH_SHORT).show();
}
@Override
public void onConnectionSuspended(int i) {
Toast.makeText(context,"Location Connection Suspended",Toast.LENGTH_SHORT);
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Toast.makeText(context,"Location Connection Failed"+connectionResult.getErrorMessage(),Toast.LENGTH_SHORT);
}
@Override
public void onLocationChanged(Location location) {
if(location==null){
Toast.makeText(context,"Cant Find User Location",Toast.LENGTH_SHORT);
}else {
LatLng ll=new LatLng(location.getLatitude(),location.getLongitude());
goToLocation(ll.latitude,ll.longitude,18);
}
}
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public boolean checkReadPermission() {
int currentAPIVersion = Build.VERSION.SDK_INT;
if (currentAPIVersion >= Android.os.Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(getApplicationContext(), Android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) MainActivity.this, Android.Manifest.permission.ACCESS_FINE_LOCATION)) {
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(MainActivity.this);
alertBuilder.setCancelable(true);
alertBuilder.setTitle("Permission necessary");
alertBuilder.setMessage("Read Internal Storage permission required to display images!!!");
alertBuilder.setPositiveButton(Android.R.string.yes, new DialogInterface.OnClickListener() {
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public void onClick(DialogInterface dialog, int which) {
ActivityCompat.requestPermissions((Activity) MainActivity.this, new String[]{Android.Manifest.permission.ACCESS_FINE_LOCATION}, map);
}
});
AlertDialog alert = alertBuilder.create();
alert.show();
} else {
ActivityCompat.requestPermissions((Activity) MainActivity.this, new String[]{Android.Manifest.permission.ACCESS_FINE_LOCATION}, map);
}
return false;
} else {
return true;
}
} else {
return true;
}
}
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public boolean checkCoarsePermission() {
int currentAPIVersion = Build.VERSION.SDK_INT;
if (currentAPIVersion >= Android.os.Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) MainActivity.this, Android.Manifest.permission.ACCESS_COARSE_LOCATION)) {
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(MainActivity.this);
alertBuilder.setCancelable(true);
alertBuilder.setTitle("Permission necessary");
alertBuilder.setMessage("Read Internal Storage permission required to display images!!!");
alertBuilder.setPositiveButton(Android.R.string.yes, new DialogInterface.OnClickListener() {
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public void onClick(DialogInterface dialog, int which) {
ActivityCompat.requestPermissions((Activity) MainActivity.this, new String[]{Android.Manifest.permission.ACCESS_COARSE_LOCATION}, coarse);
}
});
AlertDialog alert = alertBuilder.create();
alert.show();
} else {
ActivityCompat.requestPermissions((Activity) MainActivity.this, new String[]{Android.Manifest.permission.ACCESS_COARSE_LOCATION}, coarse);
}
return false;
} else {
return true;
}
} else {
return true;
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults) {
switch (requestCode) {
case map:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
} else {
Toast.makeText(context,"You have to give permission",Toast.LENGTH_SHORT).show();
}
break;
case coarse:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
} else {
Toast.makeText(context,"You have to give permission",Toast.LENGTH_SHORT).show();
}
break;
}
}}