我正在使用Fused Location来获取我的设备的当前位置,但是我实现的代码总是返回NULL。我已经仔细检查过我的设备位置是否开启并设置为高精度模式。请告诉我的代码中有什么问题?
我的代码:
import android.app.Activity;
import android.content.Context;
import android.content.IntentSender;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.PendingResult;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;
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.location.LocationSettingsRequest;
import com.google.android.gms.location.LocationSettingsResult;
import com.google.android.gms.location.LocationSettingsStatusCodes;
public class FusedLocationTest implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
private static Location mLastLocation;
private static GoogleApiClient mGoogleApiClient;
private static Context context;
public Location getCurrentLocation(Context context) {
this.context = context;
buildGoogleApiClient();
mGoogleApiClient.connect();
if ((ContextCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) && (ContextCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)) {
}
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
return mLastLocation;
}
/*connect to fused location provider*/
synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(context)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
@Override
public void onConnected(Bundle bundle) {
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
buildGoogleApiClient();
}
@Override
public void onConnectionSuspended(int i) {
}
}
致电按钮点击:
@Override
public void onClick(View v) {
Location l = new FusedLocationTest().getCurrentLocation(this);
if(l!=null)
Toast.makeText(this,l.getLatitude()+", "+l.getLongitude(), Toast.LENGTH_SHORT).show();
else
Toast.makeText(this,"NULL LOCATION", Toast.LENGTH_LONG).show();
}
答案 0 :(得分:1)
mGoogleApiClient.connect()
函数是异步的。您必须等到onConnected
,直到最后一个位置可用。 documentation中有一个明显的例子。
答案 1 :(得分:1)
将此代码添加到您的onConnected,即它将获得Last Known Location。
private static Location mLastLocation;
private static GoogleApiClient mGoogleApiClient;
private static Context context;
// added
private LocationRequest mLocationRequest;
private Double latitude;
private Double longitude;
private String TAG = ""; // set your TAG
@Override
public void onConnected(Bundle bundle) {
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
startLocationUpdates();
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if(mLastLocation == null){
startLocationUpdates();
}
if (mLastLocation != null) {
latitude = mLocation.getLatitude();
longitude = mLocation.getLongitude();
// set your tag
Log.d(TAG, String.valueOf(latitude));
Log.d(TAG, String.valueOf(longitude));
} else {
Toast.makeText(context, "Location not Detected, Did you turn off your location?", Toast.LENGTH_SHORT).show();
}
}
protected void startLocationUpdates() {
// Create the location request
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(30 * 1000)
.setFastestInterval(5 * 1000);
// Request location updates
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
从您的方法中删除synchronized,只需将其公开。如下所示:
public void buildGoogleApiClient() { }