我想从我的应用程序中获取更新的位置。但是我的应用程序没有检查这段代码
public void onSuccess(Location location){}里面的mFusedLocationProviderClient.getLastLocation()。addOnSuccessListener(这个,新的OnSuccessListener(){}并返回null位置。甚至我的设备位置都打开了,地图显示了我的位置。我的访问代码更新位置如下:
protected void onCreate(Bundle savedInstanceState) {
mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this);
}
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
Toast.makeText(this, "Map is ready", Toast.LENGTH_SHORT).show();
if (mLocationPermissionGranted) {
getDeviceLocation();
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
return;
}
mMap.setMyLocationEnabled(true);
}
}
private void getDeviceLocation(){
try {
if(mLocationPermissionGranted) //true in my case
{
mFusedLocationProviderClient.getLastLocation()
.addOnSuccessListener(this, new OnSuccessListener<Location>() {
@Override
public void onSuccess(Location location) {
// Got last known location. In some rare situations this can be null.
if (location != null) {
moveCamera(new LatLng(location.getLatitude(),location.getLongitude()),17);
// mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(),location.getLongitude()),12),2000,null);
}
else{
Toast.makeText(MapsActivity.this, "Unable to get current location", Toast.LENGTH_SHORT).show();
}
}
});
}
}catch (SecurityException ex){
}
}
我在stacktrace中遇到以下异常
09-11 15:12:14.525 5864-5864/? E/Zygote: v2
09-11 15:12:14.530 5864-5864/? E/Zygote: accessInfo : 0
09-11 15:12:27.333 5864-5864/com.example.muzammil.maptestingproject E/BoostFramework: BoostFramework() : Exception_1 = java.lang.ClassNotFoundException: Didn't find class "com.qualcomm.qti.Performance" on path: DexPathList[[],nativeLibraryDirectories=[/system/lib, /vendor/lib]]
09-11 15:12:39.327 5864-5864/com.example.muzammil.maptestingproject E/art: The String#value field is not present on Android versions >= 6.0
其他一切都是正确的,包括清单权限和gradle依赖项。可能是任何身体帮助我解决我的问题。提前致谢。
如果至少有一个客户端连接到它,则融合位置提供程序将给出该位置。如果客户端连接,它将立即尝试获取位置。如果您的活动是第一个连接的客户端,并且您调用的getLastLocation()
可能没有足够的时间来进入第一个位置。
getLastLocation()
适用于需要立即定位或根本不需要使用的地方。如果你真的想等一个位置,最好使用requestLocationUpdates()
并等待回调,而不是忙于在一个线程中等待。
这是使用location
获取requestLocationUpdates()
的方法
LocationCallback locationCallback;
LocationRequest locationRequest;
FusedLocationProviderClient fusedLocationClient;
void getLocation() {
locationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(30 * 1000)
.setFastestInterval(5 * 1000);
locationCallback = new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
super.onLocationResult(locationResult);
//Location received
}
};
fusedLocationClient = LocationServices.getFusedLocationProviderClient(getApplicationContext());
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) {
return;
}
fusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
}
并且不要忘记删除在onStop
或onDestroy
中更新的位置
fusedLocationClient?.removeLocationUpdates(locationCallback)