Android 无法解析方法 requestLocationUpdates FusedLocationProviderAPI

Question

我正在尝试关注 Android Receiving Location Updates教程。示例代码是here on Github .

除此行外，一切正常: LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

它抛出 cannot resolve method requestLocationUpdates 错误。我在 documentation 中没有看到任何内容，但我对 Android 还很陌生，所以可能会遗漏一些东西:)。

这是完整的代码。有什么想法我哪里出错了吗？谢谢!

package location.test.example.com;

import android.app.Fragment;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.ActionMode;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;

import java.util.ArrayList;
import java.util.Date;

public class LocationFragment extends Fragment implements
        GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {

    protected GoogleApiClient mGoogleApiClient;
    protected Location mCurrentLocation;
    protected LocationRequest mLocationRequest;
    protected String mLastUpdateTime;

    public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 5000;

    public static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS = UPDATE_INTERVAL_IN_MILLISECONDS / 5;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mLastUpdateTime = "";

        buildGoogleApiClient();

        if (NavUtils.getParentActivityName(getActivity()) != null) {
            getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
        }
        setHasOptionsMenu(true);

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_location, container, false);    

        return v;
    }

    protected synchronized void buildGoogleApiClient() {
        mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
        createLocationRequest();
    }

    protected void createLocationRequest() {
        mLocationRequest = new LocationRequest();

        mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);

        mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);

        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        startLocationUpdates();
    }

    protected void startLocationUpdates() {
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }

    @Override
    public void onLocationChanged(Location location) {
        mCurrentLocation = location;
        mLastUpdateTime = DateFormat.getDateFormat(getActivity()).format(new Date());
        Toast.makeText(getActivity(), location.toString() + "", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onConnected(Bundle connectionHint) {

    }

    @Override
    public void onConnectionFailed(ConnectionResult result) {
        Log.i("LocationFragment", "Connection failed: ConnectionResult.getErrorCode() " + result.getErrorCode());
    }

    @Override
    public void onConnectionSuspended(int cause) {
        Log.i("LocationFragment", "Connection suspended");
        mGoogleApiClient.connect();
    }

}

Answer 1

LocationServices.FusedLocationApi.requestLocationUpdates 的 locationListener

必须使用 LocationListener

不是

android.location.LocationListener

但是

com.google.android.gms.location.LocationListener