在android的MapActivity中使用带有线程的URL连接时出错

我正在使用一个URL连接来连接GoogleMapsWeb服务，并以KML格式获取结果，对其进行解析并将其显示在MapView上。我把这些操作放在一个线程中，但我得到了这个错误，我不知道这意味着什么？！ 请帮我找出这个错误是什么，解决方法是什么

09-28 23:00:45.026: ERROR/ActivityManager(67): ANR in com.android.uis (com.android.uis/.RoutingMapActivity)
09-28 23:00:45.026: ERROR/ActivityManager(67): Reason: keyDispatchingTimedOut
09-28 23:00:45.026: ERROR/ActivityManager(67): Load: 0.49 / 0.21 / 0.15
09-28 23:00:45.026: ERROR/ActivityManager(67): CPU usage from 22714ms to 0ms ago:
09-28 23:00:45.026: ERROR/ActivityManager(67):   99% 1049/com.android.uis: 98% user + 0.4% kernel / faults: 159 minor
09-28 23:00:45.026: ERROR/ActivityManager(67):   0.4% 199/com.google.process.gapps: 0.2% user + 0.1% kernel / faults: 52 minor
09-28 23:00:45.026: ERROR/ActivityManager(67):   0.1% 67/system_server: 0% user + 0% kernel
09-28 23:00:45.026: ERROR/ActivityManager(67):   0% 40/adbd: 0% user + 0% kernel
09-28 23:00:45.026: ERROR/ActivityManager(67):   0% 131/com.android.systemui: 0% user + 0% kernel / faults: 1 minor
09-28 23:00:45.026: ERROR/ActivityManager(67): 100% TOTAL: 99% user + 0.7% kernel
09-28 23:00:45.026: ERROR/ActivityManager(67): CPU usage from 996ms to 1566ms later:
09-28 23:00:45.026: ERROR/ActivityManager(67):   91% 1049/com.android.uis: 91% user + 0% kernel / faults: 2 minor
09-28 23:00:45.026: ERROR/ActivityManager(67):     89% 1049/com.android.uis: 89% user + 0% kernel
09-28 23:00:45.026: ERROR/ActivityManager(67):   10% 67/system_server: 5.2% user + 5.2% kernel / faults: 6 minor
09-28 23:00:45.026: ERROR/ActivityManager(67):     8.7% 97/InputDispatcher: 3.5% user + 5.2% kernel
09-28 23:00:45.026: ERROR/ActivityManager(67):     1.7% 68/HeapWorker: 0% user + 1.7% kernel
09-28 23:00:45.026: ERROR/ActivityManager(67): 100% TOTAL: 94% user + 5.2% kernel

MapActivity类

package com.android.uis;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;

import com.android.geo.Road;
import com.android.geo.RoadProvider;
import com.android.maps.MyItemizedOverlay;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.OverlayItem;

public class RoutingMapActivity extends MapActivity implements LocationListener {

    // Key : 0ObBrVVNjsIA__m7D1lmsednIXg6pcDRBG-Qvfg
    MapView mapView;
    List<Overlay> mapOverlays;
    Drawable drawable;
    Drawable drawable2;
    MyItemizedOverlay itemizedOverlay;
    MyItemizedOverlay itemizedOverlay2;
    LocationManager locationManager;
    private String provider;
    private Road mRoad;
    private Handler mHandler;
    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.map_layout);
        initMap();
        //initMyLocation();

    }
    private void initMap(){
        mapView = (MapView) findViewById(R.id.google_maps);
        mapView.setBuiltInZoomControls(true);       
        mapOverlays = mapView.getOverlays();

        new Thread(){


            @Override
            public void run(){
                double fromLat = 49.85, fromLon= 24.016667, toLat = 50.45, toLon = 30.523333;
                String url = RoadProvider.getUrl(fromLat, fromLon, toLat, toLon);
                InputStream is = getConnection(url);
                mRoad = RoadProvider.getRoute(is);
                mHandler.sendEmptyMessage(0);

            }
        }.start();

        mHandler = new Handler(){
            public void handleMessage(Message msg){
                //drawable2 = getResources().getDrawable(R.drawable.marker2);
                drawable = getResources().getDrawable(R.drawable.marker);
                itemizedOverlay2 = new MyItemizedOverlay(drawable, mapView,mRoad);
                mapOverlays.clear();
                for(int i=0; i<mRoad.mRoute.length;i++){
                    addPoint("","",new GeoPoint((int)(mRoad.mRoute[i][1]*1E6),(int)(mRoad.mRoute[i][0]*1E6)),itemizedOverlay2);
                }
                //addPoint("Point 2.","Point 2.",(int)(51.515259*1E6),(int)(-0.086623*1E6),itemizedOverlay2);
                mapOverlays.add(itemizedOverlay2);
                mapView.invalidate();
            };
        };


    }
    private InputStream getConnection(String url){
        InputStream is = null;
        try {
            URLConnection urlConn= new URL(url).openConnection();
            is= urlConn.getInputStream();
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return is;
    }
    private void addPoint(String name,String description,GeoPoint point, MyItemizedOverlay myItemizedOverlay){
        OverlayItem overlayItem = new OverlayItem(point,name,description);
        myItemizedOverlay.addOverlay(overlayItem);
    }
    private void initMyLocation(){
        locationManager =(LocationManager)getSystemService(Context.LOCATION_SERVICE);
        Criteria criteria=new Criteria();
        provider = locationManager.getBestProvider(criteria, false);
        Location location = locationManager.getLastKnownLocation(provider);

    }
    @Override
    protected boolean isRouteDisplayed() {
        return false;
    }
    @Override
    public void onLocationChanged(Location arg0) {
        // TODO Auto-generated method stub

    }
    @Override
    public void onProviderDisabled(String arg0) {
        // TODO Auto-generated method stub

    }
    @Override
    public void onProviderEnabled(String arg0) {
        // TODO Auto-generated method stub

    }
    @Override
    public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
        // TODO Auto-generated method stub

    }

}

package com.android.uis；
导入java.io.IOException；
导入java.io.InputStream；
导入java.net.MalformedURLException；
导入java.net.URL；
导入java.net.URLConnection；
导入java.util.List；
导入android.content.Context；
导入android.graphics.drawable.drawable；
导入android.location.Criteria；
导入android.location.location；
导入android.location.LocationListener；
导入android.location.LocationManager；
导入android.os.Bundle；
导入android.os.Handler；
导入android.os.Message；
导入com.android.geo.Road；
导入com.android.geo.RoadProvider；
导入com.android.maps.MyItemizedOverlay；
导入com.google.android.maps.GeoPoint；
导入com.google.android.maps.MapActivity；
导入com.google.android.maps.MapView；
导入com.google.android.maps.Overlay；
导入com.google.android.maps.OverlayItem；
公共类RoutingMapActivity扩展MapActivity实现LocationListener{
//键：0ObBrVVNjsIA_uuM7D1LMSEDNIXG6PCDRBG-Qvfg
地图视图；
列出地图覆盖图；
可拉伸；
可拉伸2；
MyItemizedOverlay itemizedOverlay；
MyItemizedOverlay ItemizedOverlay 2；
地点经理地点经理；
私有字符串提供者；
私家路；
私人经理人；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.map\u布局）；
initMap（）；
//initMyLocation（）；
}
私有void initMap（）{
mapView=（mapView）findViewById（R.id.google\u地图）；
mapView.SetBuilTinZoomControl（真）；
mapOverlays=mapView.getOverlays（）；
新线程（）{
@凌驾
公开募捐{
双fromLat=49.85，fromLon=24.016667，toLat=50.45，toLon=30.523333；
字符串url=RoadProvider.getUrl（fromLat、fromLon、toLat、toLon）；
InputStream is=getConnection（url）；
mRoad=RoadProvider.getRoute（is）；
mHandler.sendEmptyMessage（0）；
}
}.start（）；
mHandler=新处理程序（）{
公共无效handleMessage（消息消息消息）{
//drawable2=getResources（）.getDrawable（R.drawable.marker2）；
drawable=getResources（）.getDrawable（R.drawable.marker）；
itemizedOverlay2=新的MyItemizedOverlay（可绘制、地图视图、mRoad）；
mapOverlays.clear（）；
对于（int i=0；i您可以尝试使用更简单的异步任务，例如：

    private class GetKMLTask extends AsyncTask<String, Integer, String> {
    protected String doInBackground(String... unused) {
        double fromLat = 49.85, fromLon= 24.016667, toLat = 50.45, toLon = 30.523333;
        String url = "";
        InputStream is = getConnection(url);
        //.... get the road here    
        return result;
    }

    protected void onPostExecute(String jsonResult) {
        try {
            drawable = getResources().getDrawable(R.drawable.marker);
            itemizedOverlay2 = new MyItemizedOverlay(drawable, mapView,mRoad);
            mapOverlays.clear();
            for(int i=0; i<mRoad.mRoute.length;i++){
                addPoint("","",new GeoPoint((int)(mRoad.mRoute[i][1]*1E6),(int)(mRoad.mRoute[i][0]*1E6)),itemizedOverlay2);
            }
            //addPoint("Point 2.","Point 2.",(int)(51.515259*1E6),(int)(-0.086623*1E6),itemizedOverlay2);
            mapOverlays.add(itemizedOverlay2);
            mapView.invalidate();
            } 
        catch (Exception e) {
            onFail("");
        }

    }
}

私有类GetKMLTask扩展异步任务{
受保护的字符串背景（字符串…未使用）{
双fromLat=49.85，fromLon=24.016667，toLat=50.45，toLon=30.523333；
字符串url=“”；
InputStream is=getConnection（url）；
//……到这里来
返回结果；
}
受保护的void onPostExecute（字符串jsonResult）{
试一试{
drawable=getResources（）.getDrawable（R.drawable.marker）；
itemizedOverlay2=新的MyItemizedOverlay（可绘制、地图视图、mRoad）；
mapOverlays.clear（）；
对于（int i=0；我不确定如果从后台线程mapOverlays=mapview.getOverlays（）；访问mapview会发生什么情况；也请参阅本文可能有些事情需要很长时间？
    private class GetKMLTask extends AsyncTask<String, Integer, String> {
    protected String doInBackground(String... unused) {
        double fromLat = 49.85, fromLon= 24.016667, toLat = 50.45, toLon = 30.523333;
        String url = "";
        InputStream is = getConnection(url);
        //.... get the road here    
        return result;
    }

    protected void onPostExecute(String jsonResult) {
        try {
            drawable = getResources().getDrawable(R.drawable.marker);
            itemizedOverlay2 = new MyItemizedOverlay(drawable, mapView,mRoad);
            mapOverlays.clear();
            for(int i=0; i<mRoad.mRoute.length;i++){
                addPoint("","",new GeoPoint((int)(mRoad.mRoute[i][1]*1E6),(int)(mRoad.mRoute[i][0]*1E6)),itemizedOverlay2);
            }
            //addPoint("Point 2.","Point 2.",(int)(51.515259*1E6),(int)(-0.086623*1E6),itemizedOverlay2);
            mapOverlays.add(itemizedOverlay2);
            mapView.invalidate();
            } 
        catch (Exception e) {
            onFail("");
        }

    }
}