android - 减少获取用户位置的延迟

Question

我正在编写一个应用程序，其中特定模块需要用户的位置。现在我正在使用 Google 的 Fused Location API，可以在这里找到。

当用户设置中的位置被关闭时，问题就出现了。我写了一个提示更改设置的代码。我收到更改后的设置onActivityResult。但显然，融合的位置提供者需要一些时间来获取位置。我使用该handler.postDelayed方法在几秒钟后获取位置（这只是猜测）并且代码似乎工作正常。

所以我想问一下，有没有更好的方法来检索位置或减少延迟？

我的代码如下：

public class MainActivity extends AppCompatActivity {

    String addressText = "";
    int LOCATION_REQUEST_CODE = 1;
    int REQUEST_CHECK_SETTINGS = 2;
    TextView latitude, longitude;
    LocationRequest mLocationRequest;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        latitude = (TextView) findViewById(R.id.latitude);
        longitude = (TextView) findViewById(R.id.longitude);
        createLocationRequest();
    }

    void getLocation() {
        FusedLocationProviderClient mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
        if (ActivityCompat.checkSelfPermission(this,
                Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
        {
            ActivityCompat.requestPermissions( this,
                    new String[] {Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION_REQUEST_CODE);
        }
        else {
            mFusedLocationClient.getLastLocation()
                    .addOnSuccessListener(this, new OnSuccessListener<Location>() {
                        @Override
                        public void onSuccess(Location location) {
                            if (location != null) {
                                latitude.setText("Latitude : " + location.getLatitude());
                                longitude.setText("Latitude : " + location.getLongitude());
                                new GetAddress().execute(location);
                            }
                        }
                    });
        }
    }

    protected void createLocationRequest() {
        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(10000);
        mLocationRequest.setFastestInterval(5000);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
                .addLocationRequest(mLocationRequest);
        SettingsClient client = LocationServices.getSettingsClient(this);
        Task<LocationSettingsResponse> task = client.checkLocationSettings(builder.build());
        task.addOnSuccessListener(this, new OnSuccessListener<LocationSettingsResponse>() {
            @Override
            public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
                getLocation();
            }
        });
        task.addOnFailureListener(this, new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                if (e instanceof ResolvableApiException) {
                    try {
                        ResolvableApiException resolvable = (ResolvableApiException) e;
                        resolvable.startResolutionForResult(MainActivity.this,
                                REQUEST_CHECK_SETTINGS);
                    } catch (IntentSender.SendIntentException ignored) {
                    }
                }
            }
        });
    }

    class GetAddress extends AsyncTask<Location, Void, Void> {
        @Override
        protected Void doInBackground(Location... locations) {
            Location location = locations[0];
            List<Address> addresses = null;
            Geocoder geocoder = new Geocoder(MainActivity.this, Locale.getDefault());
            try
            {
                addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
            }
            catch (IOException ioException)
            {
                Toast.makeText(MainActivity.this, "Network Weak, can't fetch address", Toast.LENGTH_SHORT).show();
            }
            if (addresses == null || addresses.size()  == 0) {
                Toast.makeText(MainActivity.this, "Address not found", Toast.LENGTH_SHORT).show();
            }
            else {
                Address address = addresses.get(0);
                for(int i = 0; i <= address.getMaxAddressLineIndex(); i++)
                    addressText = addressText + System.getProperty("line.separator") + address.getAddressLine(i);
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            super.onPostExecute(aVoid);
            Toast.makeText(MainActivity.this, addressText, Toast.LENGTH_SHORT).show();
        }

    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == LOCATION_REQUEST_CODE && grantResults[0] == PackageManager.PERMISSION_GRANTED)
            getLocation();
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_CHECK_SETTINGS && resultCode == RESULT_OK)
        {
            final Handler handler = new Handler();
            handler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    getLocation();
                }
            }, 5000);
        }
    }
}