CODEWITHSUNDEEP
androidgeolocationlocation
captaindroid
captaindroid

Reputation: 2938

How to make latitude and longitude global variables?

I have made latitude and longtitude global variables.

It works fine in the MyLocationListener class as it displays the current location latitude and longitude but when it loads url ( http://maps.google.com/maps?" + "saddr=" + currentLattitude + "," + currentLongtitude + "&daddr=27.11,85.11") ) in webview, it loads the value 0 and 0.

Why?

public class ShowMapActivity extends Activity {

private WebView webView;
double currentLattitude;
double currentLongtitude;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.webview);

    LocationManager mlocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    LocationListener mlocListener = new MyLocationListener();
    mlocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
            mlocListener);

    webView = (WebView) findViewById(R.id.webView1);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.setWebViewClient(new WebViewClient());
    webView.loadUrl("http://maps.google.com/maps?" + "saddr="
            + currentLattitude + "," + currentLongtitude
            + "&daddr=27.11,85.11");

}

public class MyLocationListener implements LocationListener
{
    @Override
    public void onLocationChanged(Location loc)
    {
        currentLattitude = loc.getLatitude();

        currentLongtitude = loc.getLongitude();

        Toast.makeText(
                getApplicationContext(),

                "Latitude is: " + currentLattitude + " Longitude is: "
                        + currentLongtitude,

                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)
    {

    }
}
}

Upvotes: 1

Views: 1736

Answers (4)

Hesham Saeed
Hesham Saeed

Reputation: 5378

Because you are opening the WebView in onCreate() function and you get the location in onLocationChanged() function. which it comes after, to solve this problem, if you want to always when location changed you update the web view, just put it inside the function onLocationChanged(), if you want it to load once you can use boolean variable in your onLocationChanged() to indicate that it is the first time you go in this function.

for efficiency: you better remove the updates after you get the location to avoid battery drain.

Upvotes: 1

Rasel
Rasel

Reputation: 15477

Your double variable is giving you the default values in below line.Because before updating the location below line is executing

webView.loadUrl("http://maps.google.com/maps?" + "saddr="
            + currentLattitude + "," + currentLongtitude
            + "&daddr=27.11,85.11");

Upvotes: 1

TimVK
TimVK

Reputation: 1146

Try to put this piece of code in onLocationChanged

webView = (WebView) findViewById(R.id.webView1); 
webView.getSettings().setJavaScriptEnabled(true); 
webView.setWebViewClient(new WebViewClient()); 
webView.loadUrl("http://maps.google.com/maps?" + "saddr=" 
        + currentLattitude + "," + currentLongtitude 
        + "&daddr=27.11,85.11");

Upvotes: 3

Samir Mangroliya
Samir Mangroliya

Reputation: 40416

add this in onLocationChanged(...)

 webView.loadUrl("http://maps.google.com/maps?" + "saddr="
            + currentLattitude + "," + currentLongtitude
            + "&daddr=27.11,85.11");

Upvotes: 1

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