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Моя программа вызывает исключение с помощью null-указателя ... Я думаю, что проблема заключается в преобразовании lat3 и lon3 из double в int ... Есть ли другой способ разбора местоположения в double to int, чтобы передать его GeoPoint?В программе отображается исключение null-указателя .... преобразование double в int
Код:
public class mapLoc extends com.google.android.maps.MapActivity implements LocationListener
{
TextView t ;
int lat2,lon2,lat3,lon3;
Double presentlon,presentlat;
Drawable d;
MapView mv;
MapController mc;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.map);
t = (TextView)findViewById(R.id.maptxt);
Intent intent = getIntent();
Bundle extra = intent.getExtras();
String latitude = extra.getString("latitude");
String longitude = extra.getString("longitude");
t.append(latitude+"\t");
t.append(longitude);
Float lat1 = Float.parseFloat(latitude);
Float lon1 = Float.parseFloat(longitude);
lat2 = (int) (lat1*1E6);
lon2 = (int) (lon1*1E6);
mv = (MapView)findViewById(R.id.maps);
mc = mv.getController();
mc.setZoom(14);
mv.setBuiltInZoomControls(true);
mv.displayZoomControls(true);
mv.setClickable(true);
List<Overlay> mapOverlays = mv.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.marker);
overlay itemizedoverlay = new overlay(drawable, this);
lat3 = (int)(presentlat * 1E6);
lon3 = (int)(presentlon * 1E6);
GeoPoint point = new GeoPoint(lat3, lon3);
OverlayItem overlayitem = new OverlayItem(point, "Hello, user", "This is your present location");
mc.animateTo(point);
itemizedoverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedoverlay);
GeoPoint point2 = new GeoPoint(lat2, lon2);
OverlayItem overlayitem2 = new OverlayItem(point2, "This is your","saved location");
itemizedoverlay.addOverlay(overlayitem2);
mapOverlays.add(itemizedoverlay);
}
@Override
public void onLocationChanged(Location location)
{
presentlat = location.getLatitude();
presentlon = location.getLongitude();
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
};
}
Logcat ошибки:
05-25 10:21:52.444: W/dalvikvm(342): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
05-25 10:21:52.444: E/AndroidRuntime(342): Uncaught handler: thread main exiting due to uncaught exception
05-25 10:21:52.454: E/AndroidRuntime(342): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.loc/com.loc.mapLoc}: java.lang.NullPointerException
05-25 10:21:52.454: E/AndroidRuntime(342): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
05-25 10:21:52.454: E/AndroidRuntime(342): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
05-25 10:21:52.454: E/AndroidRuntime(342): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
05-25 10:21:52.454: E/AndroidRuntime(342): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
05-25 10:21:52.454: E/AndroidRuntime(342): at android.os.Handler.dispatchMessage(Handler.java:99)
05-25 10:21:52.454: E/AndroidRuntime(342): at android.os.Looper.loop(Looper.java:123)
05-25 10:21:52.454: E/AndroidRuntime(342): at android.app.ActivityThread.main(ActivityThread.java:4363)
05-25 10:21:52.454: E/AndroidRuntime(342): at java.lang.reflect.Method.invokeNative(Native Method)
05-25 10:21:52.454: E/AndroidRuntime(342): at java.lang.reflect.Method.invoke(Method.java:521)
05-25 10:21:52.454: E/AndroidRuntime(342): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
05-25 10:21:52.454: E/AndroidRuntime(342): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
05-25 10:21:52.454: E/AndroidRuntime(342): at dalvik.system.NativeStart.main(Native Method)
05-25 10:21:52.454: E/AndroidRuntime(342): Caused by: java.lang.NullPointerException
05-25 10:21:52.454: E/AndroidRuntime(342): at com.loc.mapLoc.onCreate(mapLoc.java:71)
05-25 10:21:52.454: E/AndroidRuntime(342): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-25 10:21:52.454: E/AndroidRuntime(342): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)