我试图显示用户的当前位置并允许用户在地图上放置一个标记。当用户点击他放置的标记时，标记将消失，他可以再次在地图上放置另一个标记。
以下代码可以很好地显示用户的当前位置并在地图上放置一个标记。它还能够移除标记。但是一旦我试图在删除它后在地图上重新放置一个标记。程序崩溃了！谁能告诉我原因？
class InterestingLocations extends ItemizedOverlay {
private ArrayList<OverlayItem> locations = new ArrayList<OverlayItem>();
private GeoPoint center = null;
private Context mContext ;
private boolean placed=false;
public InterestingLocations(Drawable defaultMarker) {
super(boundCenterBottom(defaultMarker));
// create locations of interest
GeoPoint me = new
GeoPoint((int)(lat*1000000),(int)(lng*1000000));
locations.add(new OverlayItem(me,
"Me!", "Me! Me! Me!"));
center=me;
populate();
}
public InterestingLocations(Drawable marker, Context context)
{
super(marker);
mContext= context;
// create locations of interest
GeoPoint me = new
GeoPoint((int)(lat*1000000),(int)(lng*1000000));
locations.add(new OverlayItem(me,
"Me!", "Me!"));
center=me;
populate();
}
// We added this method to find the middle point of the cluster
// Start each edge on its opposite side and move across with each point.
// The top of the world is +90, the bottom -90,
// the west edge is -180, the east +180
@Override
public void draw(Canvas canvas, MapView mapview, boolean shadow) {
// Here is where we can eliminate shadows by setting to false
super.draw(canvas, mapview, shadow);
}
@Override
protected OverlayItem createItem(int i) {
return locations.get(i);
}
@Override
public int size() {
return locations.size();
}
public boolean onTap (final GeoPoint p, final MapView mapView){
boolean tapped = super.onTap(p, mapView);
Log.i("onTap", "onTap 1");
if (tapped){
Log.i("Hit item!!", "Hited");
//do what you want to do when you hit an item
if(p!=me2){
Log.i("Hit item!!", "Hited and p!=me2");
removeOverlay();
placed=false;
}
}
else{
if(placed==false&&placeAble==true){
Log.i("placed=="+placed, "placed==false");
addOverlay(new OverlayItem(p, "Dest", "Destination"));
destLat = (float)p.getLatitudeE6() / 1000000f;
destLng = (float)p.getLongitudeE6() / 1000000f;
placed=true;
}
else{
Log.i("placed=="+placed, "here is else");
}
//do what you want to do when you DONT hit an item
}
return true;
}
//You must have this method, even if it doesn't visibly do anything
@Override
protected boolean onTap(int index) {
Log.i("Hit item!!", "Hited"+ index);
return true;
}
public void addOverlay(OverlayItem overlay) {
locations.add(overlay);
populate();
}
public void removeOverlay() {
locations.clear();
GeoPoint me = new GeoPoint((int)(lat*1000000),(int)(lng*1000000));
locations.add(new OverlayItem(me, "Me!", "Me! Me! Me!"));
populate();
}
}
来自日食的错误：
06-04 18:03:03.859: E/global(29049): Deprecated Thread methods are not supported.
06-04 18:03:03.859: E/global(29049): java.lang.UnsupportedOperationException
06-04 18:03:03.859: E/global(29049): at java.lang.VMThread.stop(VMThread.java:85)
06-04 18:03:03.859: E/global(29049): at java.lang.Thread.stop(Thread.java:1280)
06-04 18:03:03.859: E/global(29049): at java.lang.Thread.stop(Thread.java:1247)
06-04 18:03:03.859: E/global(29049): at com.knowithk.kpass.KPassActivity$1.run(KPassActivity.java:46)
06-04 18:03:17.429: E/MapActivity(29049): Couldn't get connection factory client
06-04 18:03:32.773: E/AndroidRuntime(29049): FATAL EXCEPTION: main
06-04 18:03:32.773: E/AndroidRuntime(29049): java.lang.ArrayIndexOutOfBoundsException
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.google.android.maps.ItemizedOverlay.maskHelper(ItemizedOverlay.java:562)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.google.android.maps.ItemizedOverlay.setFocus(ItemizedOverlay.java:365)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.google.android.maps.ItemizedOverlay.focus(ItemizedOverlay.java:539)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.google.android.maps.ItemizedOverlay.onTap(ItemizedOverlay.java:455)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.knowithk.kpass.taxifare.MyMap$InterestingLocations.onTap(MyMap.java:333)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.google.android.maps.OverlayBundle.onTap(OverlayBundle.java:83)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.google.android.maps.MapView$1.onSingleTapUp(MapView.java:356)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.google.android.maps.GestureDetector.onTouchEvent(GestureDetector.java:533)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.google.android.maps.MapView.onTouchEvent(MapView.java:683)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.view.View.dispatchTouchEvent(View.java:3938)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:903)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1733)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1151)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.app.Activity.dispatchTouchEvent(Activity.java:2096)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1717)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.view.ViewRoot.deliverPointerEvent(ViewRoot.java:2215)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.view.ViewRoot.handleMessage(ViewRoot.java:1886)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.os.Handler.dispatchMessage(Handler.java:99)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.os.Looper.loop(Looper.java:130)
06-04 18:03:32.773: E/AndroidRuntime(29049): at android.app.ActivityThread.main(ActivityThread.java:3687)
06-04 18:03:32.773: E/AndroidRuntime(29049): at java.lang.reflect.Method.invokeNative(Native Method)
06-04 18:03:32.773: E/AndroidRuntime(29049): at java.lang.reflect.Method.invoke(Method.java:507)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
06-04 18:03:32.773: E/AndroidRuntime(29049): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
06-04 18:03:32.773: E/AndroidRuntime(29049): at dalvik.system.NativeStart.main(Native Method)