getLastLocation()
在我的 6.0 Nexus 7 平板电脑上关闭手机位置时返回 NULL,但它在另一台设备上没有 GPS 的情况下工作。为什么会这样以及有什么方法可以解决它?我想关闭 GPS,只使用网络获取位置。
下面是我用来获取位置的类:
public class GPSCenter {
public static GoogleApiClient mGoogleApiClient;
public static Location mLastLocation;
private static Context mContext;
static GoogleApiClient.ConnectionCallbacks ccb = new GoogleApiClient.ConnectionCallbacks() {
@Override
public void onConnectionSuspended(int arg0) {
}
@Override
public void onConnected(Bundle arg0) {
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
LocationRequest mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_NO_POWER);
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
}
};
static GoogleApiClient.OnConnectionFailedListener odfl = new GoogleApiClient.OnConnectionFailedListener() {
@Override
public void onConnectionFailed(ConnectionResult arg0) {
}
};
public static synchronized void buildGoogleApiClient(Context c) {
try {
mContext = c;
mGoogleApiClient = new GoogleApiClient.Builder(c)
.addConnectionCallbacks(ccb)
.addOnConnectionFailedListener(odfl)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
} catch (Exception ex) {
Log.i("location", "error " + ex.toString());
ex.printStackTrace();
}
}
public static double getLatitude(Context c) {
try {
return mLastLocation.getLatitude();
} catch (Exception ex) {
return 0.0;
}
}
public static double getLongitude(Context c) {
try {
return mLastLocation.getLongitude();
} catch (Exception ex) {
return 0.0;
}
}
}