Is GPS on? If not prompt user to turn it on.

Here’s a quick code snippet to determine if the GPS is on, and if it isn’t go to the Setting screen allowing the user to turn it on.  Android does not allow a 3rd party app to automatically turn the GPS on/off as of 1.5, a “feature” discussed extensively on the Android Developers Forum.

    private void openGPSSettings()
    {
    	LocationManager alm =
    		(LocationManager)this.getSystemService( Context.LOCATION_SERVICE );
        if( alm.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER ) )
        {
        	Toast.makeText( this, "GPS is already on", Toast.LENGTH_SHORT ).show();
        }
        else
        {
        	Toast.makeText( this, "Please turn on GPS", Toast.LENGTH_SHORT ).show();
        	Intent myIntent = new Intent( Settings.ACTION_SECURITY_SETTINGS );
        	startActivity(myIntent);
        }
    }

Don’t forget to add the following permission to the AndroidManifest.xml file

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