如何用FusedLocationProviderClient替换FusedLocationApi？

Question

我想在connected上找到当前位置。我目前使用的是FusedLocationApi，它已被弃用。我必须使用requestLocationUpdate方法，但我在使用FusedLocationProviderClient时遇到一些语法错误。我还必须在onPause和onDestroy中使用removeLocationupdate。

这是我当前使用FusedLocationProviderClient的代码-

@Override
public void onConnected(@Nullable Bundle bundle) {
    mLocationRequest = LocationRequest.create();
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    mLocationRequest.setInterval(1000);
    mLocationRequest.setFastestInterval(1000);

    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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(mGoogleClientApi, mLocationRequest, this);
    if (mCurrentLocMarker == null) {
        Location loc = LocationServices.FusedLocationApi.getLastLocation(mGoogleClientApi);
        mLastLocation = loc;
        if (loc != null) {
            LatLng latLng = new LatLng(loc.getLatitude(), loc.getLongitude());
            MarkerOptions markerOptions = new MarkerOptions();
            markerOptions.position(latLng);
            markerOptions.title("Current Location");
            markerOptions.flat(true);
            int height = 150;
            int width = 150;
            BitmapDrawable bitmapDrawable = (BitmapDrawable)getResources().getDrawable(R.drawable.icon_navigation);
            Bitmap bitmap = bitmapDrawable.getBitmap();
            Bitmap marker = Bitmap.createScaledBitmap(bitmap, width, height, false);
            markerOptions.icon(BitmapDescriptorFactory.fromBitmap(marker));
            markerOptions.anchor(0.5f, 0.5f);
            mCurrentLocMarker = mMap.addMarker(markerOptions);
            CameraPosition cameraPosition = new CameraPosition.Builder()
                    .target(latLng)
                    .zoom(17)
                    .build();
            mMap.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
        }

    }
}
@Override
protected void onPause() {
    super.onPause();
    mapView.onPause();
    String trackid = SharedPreferenceManager.getmInstance(this).getTrackId();
    if (mGoogleClientApi != null) {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleClientApi,this);
    }
    if (!trackid.equals("NO DATA")) {
        startService(new Intent(this, LocationService.class));
    }
}

@Override
protected void onDestroy() {
    super.onDestroy();
    mapView.onDestroy();
    String trackid = SharedPreferenceManager.getmInstance(this).getTrackId();
    if (mGoogleClientApi != null) {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleClientApi, this);
    }
    if (!trackid.equals("NO DATA")) {
        startService(new Intent(this, LocationService.class));
    }
}

这是我尝试过的，但无法实现它的requestLocationUpdate和removeLocationUpdate：

FusedLocationProviderClient fusedLocationProviderClient; //Global variable
fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this); //initiate in onCreate

Answer 1

你的开始就是你所需要的。

FusedLocationProviderClient fusedLocationProviderClient; //Global variable
fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this); //initiate in onCreate

要从另一个应用程序获取位置，如googlemaps，您可以使用mFusedLocationClient.getLastLocation()它具有侦听器，addOnSuccessListener为您提供位置，addOnCompleteListener和task.getResult() == null表示您需要像mFusedLocationClient.requestLocationUpdates(getLocationRequest(), mLocationCallback, null);一样执行自己的请求

你需要删除你的监听器，例如在像mFusedLocationClient.removeLocationUpdates(mLocationCallback)这样的onPause中

您可以查看此示例https://github.com/googlesamples/android-play-location和https://developer.android.com/training/location/receive-location-updates?hl=es