I'm having a lot of trouble adding a marker to the user selected spot. Here is my code
public class ShowMapActivity extends MapActivity {
public static Context context;
private MapController mapController;
MapView mapView;
private LocationManager locationManager;
private MyOverlays itemizedoverlay;
private int latitude;
private int longitude;
private int lat;
private int lng;
public void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.map); // bind the layout to the activity
// create a map view
//RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.map);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
// Either satellite or 2d
mapView.setSatellite(true);
mapController = mapView.getController();
mapController.setZoom(14); // Zoon 1 is world view
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
0, new GeoUpdateHandler());
Drawable drawable = this.getResources().getDrawable(R.drawable.point);
itemizedoverlay = new MyOverlays(drawable);
createMarker();
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
public class GeoUpdateHandler implements LocationListener {
//ignore this :)
@Override
public void onLocationChanged(Location location) {
latitude = (int) (location.getLatitude() * 1E6);
longitude = (int) (location.getLongitude() * 1E6);
GeoPoint point = new GeoPoint(latitude, longitude);
//createMarker();
//Stop refreshing pointer
//mapController.animateTo(point); // mapController.setCenter(point);
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
private void createMarker() {
GeoPoint p = mapView.getMapCenter();
OverlayItem overlayitem = new OverlayItem(p, "", "");
itemizedoverlay.addOverlay(overlayitem);
mapView.getOverlays().add(itemizedoverlay);
mapView.invalidate();
}
public void onBackPressed() {
finish();
}
}
MyOverlays.java
public class MyOverlays extends ItemizedOverlay<OverlayItem> {
private static int maxNum = 5;
private OverlayItem overlays[] = new OverlayItem[maxNum];
//private ArrayList<OverlayItem> overlays = new ArrayList<OverlayItem>();
private int index = 0;
private boolean full = false;
private MyOverlays itemizedoverlay;
private Context context;
public MyOverlays(Drawable defaultMarker) {
super(boundCenterBottom(defaultMarker));
context = Application.getAppContext();
}
@Override
public boolean onTouchEvent(MotionEvent event, MapView mapView)
{
//---when user lifts his finger---
if (event.getAction() == 1) {
GeoPoint p = mapView.getProjection().fromPixels(
(int) event.getX(),
(int) event.getY());
Toast.makeText(context,
p.getLatitudeE6() / 1E6 + "," +
p.getLongitudeE6() /1E6 ,
Toast.LENGTH_SHORT).show();
int lat = p.getLatitudeE6();
int lng = p.getLongitudeE6();
int latTest = p.getLatitudeE6() / 1000000;
int lngTest = p.getLongitudeE6() / 1000000;
//Add marker for selected area
GeoPoint point2 = new GeoPoint(latTest, lngTest);
OverlayItem overlayitem2 = new OverlayItem(point2, "Test, konichiwa!", "Test");
itemizedoverlay.addOverlay(overlayitem2);
mapView.getOverlays().add(itemizedoverlay);
SharedPreferences longSettings = context.getSharedPreferences("LONGITUDE", 0);
SharedPreferences latSettings = context.getSharedPreferences("LATITUDE", 0);
Editor e = longSettings.edit();
Editor e2 = latSettings.edit();
e.putInt("LONGITUDE", lng);
e2.putInt("LATITUDE", lat);
e.commit();
e2.commit();
}
return false;
}
@Override
protected OverlayItem createItem(int i) {
return overlays[i];
}
@Override
public int size() {
if (full) {
return overlays.length;
} else {
return index;
}
}
public void addOverlay(OverlayItem overlay) {
if (index < maxNum) {
overlays[index] = overlay;
} else {
index = 0;
full = true;
overlays[index] = overlay;
}
index++;
populate();
}
}
createMarker() works fine in my ShowMapActivity but not when trying to do it manually within 'MyOverlays'. I wasn't sure if I was giving the location parameters correctly so I've tried both ways (see lat and latTest). That doesn't appear to the issue.
Stacktrace
03-14 04:24:54.596: E/AndroidRuntime(31512): FATAL EXCEPTION: main
03-14 04:24:54.596: E/AndroidRuntime(31512): java.lang.NullPointerException
03-14 04:24:54.596: E/AndroidRuntime(31512): at com.lol.MyOverlays.onTouchEvent(MyOverlays.java:60)
03-14 04:24:54.596: E/AndroidRuntime(31512): at com.google.android.maps.OverlayBundle.onTouchEvent(OverlayBundle.java:63)
03-14 04:24:54.596: E/AndroidRuntime(31512): at com.google.android.maps.MapView.onTouchEvent(MapView.java:679)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.view.View.dispatchTouchEvent(View.java:3901)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:903)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
03-14 04:24:54.596: E/AndroidRuntime(31512): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1714)
03-14 04:24:54.596: E/AndroidRuntime(31512): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1130)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.app.Activity.dispatchTouchEvent(Activity.java:2096)
03-14 04:24:54.596: E/AndroidRuntime(31512): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1698)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.view.ViewRoot.deliverPointerEvent(ViewRoot.java:2200)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.view.ViewRoot.handleMessage(ViewRoot.java:1884)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.os.Handler.dispatchMessage(Handler.java:99)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.os.Looper.loop(Looper.java:130)
03-14 04:24:54.596: E/AndroidRuntime(31512): at android.app.ActivityThread.main(ActivityThread.java:3835)
03-14 04:24:54.596: E/AndroidRuntime(31512): at java.lang.reflect.Method.invokeNative(Native Method)
03-14 04:24:54.596: E/AndroidRuntime(31512): at java.lang.reflect.Method.invoke(Method.java:507)
03-14 04:24:54.596: E/AndroidRuntime(31512): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
03-14 04:24:54.596: E/AndroidRuntime(31512): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
03-14 04:24:54.596: E/AndroidRuntime(31512): at dalvik.system.NativeStart.main(Native Method)
Anyone have any guidance?
