我想放另一个标记，显示持续移动的人的位置。我希望更新标记，因为此人在谷歌地图上移动，我已尝试从https://stackoverflow.com/a/33885379/5324829链接，但我无法在预定义位置上设置标记动画，有人可以帮我解决此问题吗？在此先感谢，这是我的代码..
GoogleMap mGoogleMap;
SupportMapFragment mapFrag;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker;
boolean isFirstTime = true;
private ArrayList<LatLng> markerPoints;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// getSupportActionBar().setTitle("Map Location Activity");
//check for internet
mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFrag.getMapAsync(this);
markerPoints = new ArrayList<LatLng>();
//call web service to fetch location
//on response call direction api
//
}
@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//stop location updates when Activity is no longer active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(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
//Location Permission already granted
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
mGoogleMap.setOnMyLocationButtonClickListener(new GoogleMap.OnMyLocationButtonClickListener() {
@Override
public boolean onMyLocationButtonClick() {
LatLng latLng = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude());
CameraUpdate center =
CameraUpdateFactory.newLatLng(latLng);
CameraUpdate zoom = CameraUpdateFactory.zoomTo(15.0f);
mGoogleMap.moveCamera(center);
mGoogleMap.animateCamera(zoom);
return false;
}
});
} 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)
.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(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
@Override
public void onConnectionSuspended(int i) {}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {}
@Override
public void onLocationChanged(Location location)
{
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
/*this condition is to set the map to the current location only for the first time,
after onLocationChanged() method is called every second so it will move us to current location every second*/
if (isFirstTime) {
//Place current location marker
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
/*MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
*/
CameraUpdate center =
CameraUpdateFactory.newLatLng(latLng);
CameraUpdate zoom = CameraUpdateFactory.zoomTo(16.0f);
mGoogleMap.moveCamera(center);
mGoogleMap.animateCamera(zoom);
//move map camera
// mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,15.0f));
isFirstTime = false;
markerPoints.add(new LatLng(23.0515539,72.5158113));
markerPoints.add(new LatLng(23.0504289,72.5153713));
markerPoints.add(new LatLng(23.0491435,72.5159617));
markerPoints.add(new LatLng(23.0482305,72.5155917));
markerPoints.add(new LatLng(23.0473917,72.5154952));
Bitmap Icon = BitmapFactory.decodeResource(getResources(), R.mipmap.bus);
setAnimation(mGoogleMap,markerPoints,Icon);
}
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
private void checkLocationPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
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(MainActivity.this,
new String[]{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[]{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,
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.
Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
public static void setAnimation(GoogleMap myMap, final List<LatLng> directionPoint, final Bitmap bitmap) {
Marker marker = myMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromBitmap(bitmap))
.position(directionPoint.get(0))
.flat(true));
myMap.animateCamera(CameraUpdateFactory.newLatLngZoom(directionPoint.get(0), 16));
animateMarker(myMap, marker, directionPoint, false);
}
private static void animateMarker(GoogleMap myMap, final Marker marker, final List<LatLng> directionPoint,
final boolean hideMarker) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
Projection proj = myMap.getProjection();
final long duration = 30000;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
int i = 0;
@Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed
/ duration);
if (i < directionPoint.size())
marker.setPosition(directionPoint.get(i));
i++;
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 5);
} else {
if (hideMarker) {
marker.setVisible(false);
} else {
marker.setVisible(true);
}
}
}
});
}
答案 0 :(得分：1)
您可以将其用作，从位置更改侦听器中删除代码并将其放在某个位置（仅用于检查目的），稍后您可以将其放在后台服务中。
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
markerPoints.clear();
markerPoints.add(new LatLng(23.049543, 72.517195));
markerPoints.add(new LatLng(23.048457, 72.516787));
markerPoints.add(new LatLng(23.048989, 72.516973));
markerPoints.add(new LatLng(23.048263, 72.516667));
markerPoints.add(new LatLng(23.047409, 72.516281));
markerPoints.add(new LatLng(23.046219, 72.515696));
Bitmap Icon = BitmapFactory.decodeResource(getResources(), R.mipmap.bus);
setAnimation(mGoogleMap,markerPoints,Icon);
}
});
public static void setAnimation(GoogleMap myMap, final List<LatLng> directionPoint, final Bitmap bitmap) {
myMap.clear();
Marker marker = myMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromBitmap(bitmap))
.position(directionPoint.get(0))
.flat(true));
myMap.animateCamera(CameraUpdateFactory.newLatLngZoom(directionPoint.get(0), 16));
animateMarker(myMap, marker, directionPoint, false);
}
private static void animateMarker(GoogleMap myMap, final Marker marker, final List<LatLng> directionPoint,
final boolean hideMarker) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
Projection proj = myMap.getProjection();
final long duration = 30000;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
int i = 0;
@Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed
/ duration);
if (i < directionPoint.size())
marker.setPosition(directionPoint.get(i));
i++;
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 150);
} else {
if (hideMarker) {
marker.setVisible(false);
} else {
marker.setVisible(true);
}
}
}
});
}