Android - How to get current location (latitude and longitude)?

问题

I am using the following code to get the current location namely (latitude and longitude), but I am not getting current location (latitude and longitude).

Anyone knows why?

package com.ram.currentlocation;

import android.app.Activity;    
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Toast;

public class Location_Gps extends Activity
{

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);

      /* Use the LocationManager class to obtain GPS locations */
      LocationManager mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);

      LocationListener mlocListener = new MyLocationListener();
      mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
    }

    /* Class My Location Listener */
    public class MyLocationListener implements LocationListener
    {

      @Override
      public void onLocationChanged(Location loc)
      {

        loc.getLatitude();
        loc.getLongitude();

        String Text = "My current location is: " +
        "Latitud = " + loc.getLatitude() +
        "Longitud = " + loc.getLongitude();

        Toast.makeText( getApplicationContext(), Text, Toast.LENGTH_SHORT).show();
      }

      @Override
      public void onProviderDisabled(String provider)
      {
        Toast.makeText( getApplicationContext(), "Gps Disabled", Toast.LENGTH_SHORT ).show();
      }

      @Override
      public void onProviderEnabled(String provider)
      {
        Toast.makeText( getApplicationContext(), "Gps Enabled", Toast.LENGTH_SHORT).show();
      }

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

      }
    }
}

P.S.: I am using the following permissions in the manifest file:

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_CORSE_LOCATION"/>

回答1:

You have a mistake in your manifest file. Correct one is:

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

回答2:

You have to send location fix to emulator,as emulator is software you need to provide with location fix.

If you are using eclipse go to

Window -> Show view -> Other

Select Android tab and search for emulator control.
After u see emulator control window navigate to location controls.
As u see in below pic

After you have sent loc fix you can use

Location loc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);

Where lm is LocationManager object so 90% of work is done ;)

Cheers!

回答3:

In your android manifest did you set the permissions?

android.permission.ACCESS_FINE_LOCATION

As far as only getting (0,0) co-ords you're probably using the emulator. If you're using eclipse go to the emulator control and at the bottom you can send the fake co-ords to the device