我在谷歌地图上显示POI的列表： -
1-用户放大或缩小web服务调用，该调用响应特定位置的xml属性。
2-获取属性后，我们必须过滤具有相同lat，long的属性并在地图上显示气泡上的那些数字（例如3个列表具有相同的lat，将该列表长放入arrayList并显示在气泡3上）。
3-但是当我很少不总是在缩放时出现异常：
06-27 15:10:57.269: E/AndroidRuntime(4968): FATAL EXCEPTION: main
06-27 15:10:57.269: E/AndroidRuntime(4968): java.lang.ArrayIndexOutOfBoundsException: index=0 length=0
06-27 15:10:57.269: E/AndroidRuntime(4968): at com.google.android.maps.ItemizedOverlay.getIndexToDraw(ItemizedOverlay.java:211)
06-27 15:10:57.269: E/AndroidRuntime(4968): at com.google.android.maps.ItemizedOverlay.draw(ItemizedOverlay.java:240)
06-27 15:10:57.269: E/AndroidRuntime(4968): at com.google.android.maps.Overlay.draw(Overlay.java:179)
06-27 15:10:57.269: E/AndroidRuntime(4968): at com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:42)
06-27 15:10:57.269: E/AndroidRuntime(4968): at com.google.android.maps.MapView.onDraw(MapView.java:530)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.View.draw(View.java:9304)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.drawChild(ViewGroup.java:2586)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2189)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.drawChild(ViewGroup.java:2584)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2189)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.drawChild(ViewGroup.java:2584)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2189)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.drawChild(ViewGroup.java:2584)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2189)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.drawChild(ViewGroup.java:2584)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2189)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.drawChild(ViewGroup.java:2584)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2189)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.View.draw(View.java:9307)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.widget.FrameLayout.draw(FrameLayout.java:419)
06-27 15:10:57.269: E/AndroidRuntime(4968): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2076)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewRoot.draw(ViewRoot.java:1706)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewRoot.performTraversals(ViewRoot.java:1420)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.view.ViewRoot.handleMessage(ViewRoot.java:2066)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.os.Handler.dispatchMessage(Handler.java:99)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.os.Looper.loop(Looper.java:132)
06-27 15:10:57.269: E/AndroidRuntime(4968): at android.app.ActivityThread.main(ActivityThread.java:4126)
06-27 15:10:57.269: E/AndroidRuntime(4968): at java.lang.reflect.Method.invokeNative(Native Method)
06-27 15:10:57.269: E/AndroidRuntime(4968): at java.lang.reflect.Method.invoke(Method.java:491)
06-27 15:10:57.269: E/AndroidRuntime(4968): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
06-27 15:10:57.269: E/AndroidRuntime(4968): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
06-27 15:10:57.269: E/AndroidRuntime(4968): at dalvik.system.NativeStart.main(Native Method)
我正在使用此代码：-`
mapView.setOnTouchListener(new OnTouchListener() {
private class Mapdatatask extends AsyncTask<Void, Void, Integer> {
@Override
protected Integer doInBackground(Void... params) {
try
{
StringBuilder sb=new StringBuilder();
URL sourceUrl=new URL(ListURL);
System.out.println("----ListURL------"+ListURL);
InputStream inputStream=sourceUrl.openStream();
//add if necessary the PushBack measure to safeguard the intended purpose here if really happening
//that you can actually ascertain it by saving a local copy for inspection
BufferedReader br=new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line=br.readLine())!=null) {
sb.append(line+"\n");
}
br.close();
SAXParserFactory spff=SAXParserFactory.newInstance();
spff.setNamespaceAware(true);
SAXParser spp=spff.newSAXParser();
XMLReader xr=spp.getXMLReader();
myHandler=new ApplicationHandler();
xr.setContentHandler(myHandler);
xr.parse(new InputSource(new StringReader(sb.toString())));
//xr.parse(new InputSource(sourceUrl.openStream()));
valueoftotal = ApplicationHandler.value;
}
catch(IOException e) {
e.printStackTrace();
} catch (SAXException e) {
try
{
StringBuilder sb=new StringBuilder();
URL sourceUrl=new URL(ListURL);
InputStream inputStream=sourceUrl.openStream();
//add if necessary the PushBack measure to safeguard the intended purpose here if really happening
//that you can actually ascertain it by saving a local copy for inspection
BufferedReader br=new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line=br.readLine())!=null) {
sb.append(line+"\n");
}
br.close();
inputStream.close();
SAXParserFactory spff=SAXParserFactory.newInstance();
spff.setNamespaceAware(true);
SAXParser spp=spff.newSAXParser();
XMLReader xr=spp.getXMLReader();
Log.e("ListURL to parse ",""+ListURL);
myHandler=new ApplicationHandler();
xr.setContentHandler(myHandler);
System.out.println(""+sb);
xr.parse(new InputSource(new StringReader(sb.toString())));
//xr.parse(new InputSource(sourceUrl.openStream()));
valueoftotal = ApplicationHandler.value;
//arrayList = myHandler.getParsedData();
}
catch(IOException e1) {
e1.printStackTrace();
Log.e("parse exception0"," dont know why");
Log.e("XML Error ",e.toString());
return 1;
}
@Override
protected void onPostExecute(Integer result)
{
if(valueoftotal!=null && !valueoftotal.equalsIgnoreCase(""))
{
if(Integer.parseInt(valueoftotal) > 0 && Integer.parseInt(valueoftotal) <= 100)
{
OverlayItem oi=null;
if(myHandler.getParsedData()!=null)
{
ArrayList<Applicationdataset> arrayList = myHandler.getParsedData();
//mlist = new ArrayList<Applicationdataset>();
myvectorlist = new Vector<ArrayList<Applicationdataset>>();
//mlist.addAll(arrayList);
System.out.println(arrayList.size()+"++++++++++");
Map<Key, ArrayList<Applicationdataset>> mlistVector = groupTheList(arrayList);
myvectorlist = putIntoVector(mlistVector);
for(int mindex=0;mindex<myvectorlist.size();mindex++)
{
if(myvectorlist.get(mindex)==null)
{
myvectorlist.remove(mindex);
}
if(myvectorlist.get(mindex).size()==0)
{
myvectorlist.remove(mindex);
}
}
}
linearbottom2.setClickable(true);
synchronized (oi) {
mapOverlays.clear();
overlay.removeAll();
}
lineartabbar.setBackgroundResource(R.drawable.mapbar);
if(myvectorlist != null && myvectorlist.size() > 1)
{
Applicationdataset data = null;
for(int i = 0; i < myvectorlist.size(); i++)
{
{
data = myvectorlist.get(i).get(0);
String latvalue = data.getLatitude().toString();
String lonvalue = data.getLongitude().toString();
GeoPoint point = null;
try
{
point = new GeoPoint((int)(Double.parseDouble(latvalue)*1E6),(int)(Double.parseDouble(lonvalue)*1E6));
}
catch (NumberFormatException e)
{
}
if(point != null)
{
oi = overlay.createItem(i);
if(overlay!=null)
{
if(oi!=null)
{
System.out.println("overlay.size()--"+overlay.size());
if(overlay.size()!=0)
{
overlay.addItem(oi);
if(myvectorlist.size() == 1)
{
mc.animateTo(point);
mc.setCenter(point);
mc.setZoom(16);
}
}
}
}//end
}
}
System.out.println("+++size of overlay++++"+overlay.size());
mapOverlays.add(overlay);
mapView.invalidate();
}
textViewpopup.setText(valueoftotal+" listings found.");
linearlayoutpopup.setVisibility(View.VISIBLE);
RunAnimationslisting();
}
else if(Integer.parseInt(valueoftotal) > 100)
{
Eyelidmessage(valueoftotal+" listings found. \n Zoom-in, press the locate button below or select the refine button above to display fewer properties. ");
lineartabbar.setBackgroundResource(R.drawable.mapwithoutlist);
linearbottom2.setClickable(false);
}
else if(Integer.parseInt(valueoftotal) == 0)
{
GoneAnimations();
lineartabbar.setBackgroundResource(R.drawable.mapwithoutlist);
linearbottom2.setClickable(false);
customizeDialog = new CustomizeDialog(activity);
customizeDialog.setTitle("Sorry");
customizeDialog.setMessage("No Listing Found");
customizeDialog.show();
}
}
super.onPostExecute(result);
}
@Override
protected void onCancelled() {
currenttask = null;
}
}
private class GoogleMapViewOverlay extends ItemizedOverlay
{
ImageButton bluebutton,savebutton,closebutton;
ImageThreadLoader imageloader;
//final MapController mc;
TextView text1,text2,text3,text4,textup;
ImageView imageview;
private PopupPanel panel = new PopupPanel(R.layout.mappopup);
private Drawable marker;
private Context mContext;
public GoogleMapViewOverlay(Drawable drawable, MapView mapView,
Activity activity2)
{
//super(drawable);
super(boundCenterBottom(drawable));
setLastFocusedIndex(-1);
populate();
items = new ArrayList<OverlayItem>();
marker = drawable;
mContext = mapView.getContext();
mc = mapView.getController();
this.activity = activity2;
DB = new DatabaseHelper(activity2);
}
public void removeAll()
{
items.clear();
setLastFocusedIndex(-1);
populate();
}
@Override
protected OverlayItem createItem(int index)
{
Projection getcoords;
GeoPoint point = null;
int size =0;
String latvalue="";
String lonvalue="";
Point pcon = new Point(0,0);
getcoords = mapView.getProjection();
if(myvectorlist!=null)
{
if(myvectorlist.size()!=0)
{
size = myvectorlist.get(index).size();
latvalue = myvectorlist.get(index).get(0).getLatitude().toString();
lonvalue = myvectorlist.get(index).get(0).getLongitude().toString();
}
}
try
{
point = new GeoPoint((int)(Double.parseDouble(latvalue)*1E6),(int)(Double.parseDouble(lonvalue)*1E6));
}
catch (NumberFormatException e)
{
e.printStackTrace();
}
if(getcoords!=null)
{
if(point!=null)
{
if(pcon!=null)
{
getcoords.toPixels(point, pcon);
}
}
}
OverlayItem oi = new OverlayItem(point,"", "");
if(size == 1)
{
boundCenterBottom(drawable);
oi.setMarker(drawable);
}else
if(size>1)
{
Drawable d= writeOnDrawable(drawable1,size);
boundCenterBottom(d);//drawable1
oi.setMarker(d);//drawable1
}
return oi;
}
@Override
public int size()
{
//Log.e("","items.size()"+items.size());
if (items != null && items.size() > 0)
return items.size();
else
return 0;
}
public void addItem(OverlayItem item)
{
System.out.println("adddoverlayitem "+items+"\titem"+item);
try {
items.add(item);
setLastFocusedIndex(-1);
populate();
} catch (NullPointerException e) {
e.printStackTrace();
}
}
class PopupPanel
{
// View popup;
PopupPanel(int layout)
{
ViewGroup parent=(ViewGroup)mapView.getParent();
popup = getLayoutInflater().inflate(layout, parent, false);
}
View getView() {
return(popup);
}
void show(boolean alignTop)
{
popup.setVisibility(View.VISIBLE);
RelativeLayout.LayoutParams lp=new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT
);
if (alignTop)
{
lp.addRule(RelativeLayout.ALIGN_PARENT_TOP);
lp.setMargins(65, 100, 0, 0);
}
else
{
lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
lp.setMargins(0, 0, 0, 60);
}
hide();
((ViewGroup)mapView.getParent()).addView(popup, lp);
isVisible=true;
}
void hide() {
if (isVisible)
{
isVisible=false;
((ViewGroup)popup.getParent()).removeView(popup);
}
}
}
public void Eyelidmessage(String message)
{
textViewpopup.setText(message);
linearlayoutpopup.setVisibility(View.VISIBLE);
RunAnimations();
}
private void RunAnimationslisting() {
Animation a;
a = AnimationUtils.loadAnimation(this, R.anim.translate);
a.reset();
linearlayoutpopup.clearAnimation();
a.setFillAfter(true);
linearlayoutpopup.startAnimation(a);
a.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationEnd(Animation animation) {
System.out.println("@@doneanimation listner works 1@@");
try {
Thread.sleep(2000);
GoneAnimationslisting();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationStart(Animation animation) {
}
});
}
private void GoneAnimationslisting() {
Animation a1;
a1 = AnimationUtils.loadAnimation(this, R.anim.translate1);
a1.reset();
linearlayoutpopup.clearAnimation();
a1.setFillAfter(true);
linearlayoutpopup.startAnimation(a1);
a1.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationEnd(Animation animation) {
System.out.println("@@doneanimation listner works 1@@");
linearlayoutpopup.setVisibility(View.GONE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationStart(Animation animation) {
}
});
}
private Drawable writeOnDrawable(Drawable objdrawable, int size)
{
String text = ""+size;
Bitmap bitmap = ((BitmapDrawable)objdrawable).getBitmap().copy(Bitmap.Config.ARGB_8888, true);
Paint paint = new Paint();
paint.setStyle(Style.FILL);
paint.setColor(Color.WHITE);
paint.setTypeface((Typeface.defaultFromStyle(Typeface.BOLD)));
paint.setTextSize(20);
float txtwidth = paint.measureText(text);
Canvas canvas = new Canvas(bitmap);
// canvas.drawText(text, 0, , paint);
canvas.drawText(text,((bitmap.getWidth()/2)-(txtwidth/2)),bitmap.getHeight()/2, paint);
Drawable d =new BitmapDrawable(getResources(),bitmap);
return d;
}
private Map<Key, ArrayList<Applicationdataset>> groupTheList(ArrayList<Applicationdataset> arrayList) {
Map<Key, ArrayList<Applicationdataset>> map = new HashMap<Key, ArrayList<Applicationdataset>>();
for (Applicationdataset appSet : arrayList) {
Key key = new Key(appSet.getLatitude(), appSet.getLongitude());
ArrayList<Applicationdataset> list = map.get(key);
if (list == null) {
list = new ArrayList<Applicationdataset>();
map.put(key, list);
}
list.add(appSet);
}
return map;
}
public class Key {
String _lat;
String _lon;
Key(String lat, String lon) {
_lat = lat.trim();
_lon = lon.trim();
}
@Override
public boolean equals(Object o) {
//if (this == o) return true;
// if (o == null || getClass() != o.getClass()) return false;
//Key key = (Key) o;
//if (!_lat.equals(key._lat)) return false;
//if (!_lon.equals(key._lon)) return false;
return o instanceof Key
&& (_lat.equals(((Key)o)._lat))
&& (_lon.equals(((Key)o)._lon));
//return true;
}
@Override
public int hashCode() {
return _lat.hashCode() + _lon.hashCode();
}
}
private Vector<ArrayList<Applicationdataset>> putIntoVector(Map<Key, ArrayList<Applicationdataset>> myMap)
{
Vector<ArrayList<Applicationdataset>> mvectorlist = new Vector<ArrayList<Applicationdataset>>();
Iterator<Entry<Key, ArrayList<Applicationdataset>>> miterator = myMap.entrySet().iterator();
while (miterator.hasNext()) {
Map.Entry<Key, ArrayList<Applicationdataset>> pairs = (Map.Entry<Key, ArrayList<Applicationdataset>>)miterator.next();
mvectorlist.add(pairs.getValue());
miterator.remove(); // avoids a ConcurrentModificationException
}
return mvectorlist;
}
}
任何人帮助我，我无法解决这个问题，直到现在大约10个小时我一直在花钱看到这个..
答案 0 :(得分：3)
java.lang.ArrayIndexOutOfBoundsException: index=0 length=0表示您在大小为零时尝试访问ArrayList的元素。返回代码并确保您没有尝试访问空列表。
编辑：
好的，我想我知道你的问题是什么。我认为您正在使用createItem尝试为您的ItemizedOverlay添加叠加层。此功能命名不佳，实际上并不创建项目。它只是从OverlayItems数组中返回一个项目。您需要使用GoogleMapViewOverlay.addOverlay(OverlayItem)向地图添加OverlayItem。尝试使用随机坐标创建几个测试叠加层，看看是否有效。请务必停止使用createItem()并开始使用addItem()。如果这不是您的问题，请发布您的所有代码，也许我们可以帮助您更好一点。
答案 1 :(得分：0)
我不确定您的代码中出现错误的位置，但您可以尝试更改：
if (size == 1) {
} else {
}
为：
if (size == 1) {
} else if (size > 1) {
}
这可能会消除你的ArrayIndexOutOfBoundsException
答案 2 :(得分：0)
花了更多时间后，由于这篇文章，我已经达到了我的问题： - Async Task throw ConCurrent Modification Exception?