在API级别19到22的android中检索当前位置

Question

我在项目中使用以下代码来检索用户的当前位置。但是，这似乎适用于我的API级别23的测试设备，但不适用于我的API级别19到22的测试设备。对位置的请求将返回null，因此将我放在坐标0,0 .. < / p>

如何获得API级别19到22的正确坐标？

package be.enventorslab.pingvalue;

import android.content.IntentSender;
import android.content.pm.PackageManager;
import android.location.Location;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

import be.enventorslab.pingvalue.functions.Functions;

public class NearbyLocationActivity extends AppCompatActivity
        implements GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener,
        LocationListener {

        public static final String TAG = NearbyLocationActivity.class.getSimpleName();

        private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;

        private GoogleMap mMap;

        private GoogleApiClient mGoogleApiClient;
        private LocationRequest mLocationRequest;

        Bundle bundle;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_nearby_map);

            setUpMapIfNeeded();

            mGoogleApiClient = new GoogleApiClient.Builder(this)
                    .addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this)
                    .addApi(LocationServices.API)
                    .build();

            mLocationRequest = LocationRequest.create()
                    .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
                    .setInterval(10 * 1000)
                    .setFastestInterval(1 * 1000)
                    .setSmallestDisplacement(1);
        }

        @Override
        protected void onStart() {
            super.onStart();
            setUpMapIfNeeded();
            mGoogleApiClient.connect();
        }

        @Override
        protected void onStop() {
            super.onStop();
            if (mGoogleApiClient.isConnected()) {
                LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
                mGoogleApiClient.disconnect();
            }
        }

    private void setUpMapIfNeeded() {
        if (mMap == null) {
            mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
        }
    }

    @Override
    public void onConnected(Bundle bundle) {
        if (Functions.Permissions.getFineLocation(this)) {
            Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
            if (location == null) {
                LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
            } else {
                handleNewLocation(location);
            }
        } else {
            this.bundle = bundle;
        }
    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        if (connectionResult.hasResolution()) {
            try {
                connectionResult.startResolutionForResult(this, CONNECTION_FAILURE_RESOLUTION_REQUEST);
            } catch (IntentSender.SendIntentException e) {
                e.printStackTrace();
            }
        } else {
            Log.i(TAG, "Location services connection failed with code " + connectionResult.getErrorCode());
        }
    }

    @Override
    public void onLocationChanged(Location location) {
        handleNewLocation(location);
    }

    private void handleNewLocation(Location location) {
        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
        MarkerOptions options = new MarkerOptions().position(latLng).title("I am here!");
        mMap.addMarker(options);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        if (requestCode == Functions.Permissions.MY_PERMISSIONS_FINE_LOCATION) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                onConnected(bundle);
            }
        }
    }
}