我有以下活动运行不同的线程。我需要检索一个数组列表，但我得到的只是一个例外。我在谷歌上发现了类似的问题，但我无法使解决方案适应我的代码。
这是我的班级：
public class MapActivity extends Activity {
private int userIcon, jewelleryIcon;
private GoogleMap theMap;
private LocationManager locMan;
private Marker userMarker;
private Marker bijouterie;
private String latitude;
private String longitude;
ArrayList<String> latList;
ArrayList<String> longList;
ArrayList<String> latitudeList;
ArrayList<String> longitudeList;
// URL to get JSON
private static String url = "api";
private static String url2 = "api";
/** Called when the activity is first created. */
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Portrait only
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
// Check status of Google Play Services
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
// Check Google Play Service Available
try {
if (status != ConnectionResult.SUCCESS) {
}
} catch (Exception e) {
Log.e("Error: GooglePlayServiceUtil: ", "" + e);
}
//Remove title bar
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
//Remove notification bar
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
// Google Maps
setContentView(R.layout.activity_map);
// Calling async task to get json
new GetJson().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetJson extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
JSONArray array = null;
try {
array = new JSONArray(jsonStr);
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
for (int i = 0; i <array.length(); i++){
JSONObject jsonObject = array.getJSONObject(i);
String id = jsonObject.getString("id");
System.out.println("id --->" + id);
String url = jsonObject.getString("url");
System.out.println("url --->" + url);
// shopurl.add(url);
String created_at = jsonObject.getString("created_at");
System.out.println("created_at --->" + created_at);
String updated_at = jsonObject.getString("updated_at");
System.out.println("updated_at --->" + updated_at);
String name = jsonObject.getString("name");
System.out.println("name --->" + name);
// shopname.add(name);
JSONArray photos_urls = jsonObject.getJSONArray("photos_urls");
System.out.println("photos_urls --->" + photos_urls);
String address_string = jsonObject.getString("address_string");
System.out.println("address_string --->" + address_string);
// shopaddress.add(address_string);
JSONObject booklet = jsonObject.getJSONObject("booklet");
String id_booklet = booklet.getString("id");
System.out.println("id_booklet --->" + id_booklet);
String url_booklet = booklet.getString("url");
System.out.println("url_booklet --->" + url_booklet);
String created_at_booklet = booklet.getString("created_at");
System.out.println("created_at_booklet --->" + created_at_booklet);
String updated_at_booklet = booklet.getString("updated_at");
System.out.println("updated_at_booklet --->" + updated_at_booklet);
String document_url = booklet.getString("document_url");
System.out.println("document_url --->" + document_url);
String presented = booklet.getString("presented");
System.out.println("presented --->" + presented);
}
}
catch (JSONException e) {
e.printStackTrace();
}
// 2e JSON
// Creating service handler class instance
ServiceHandler sh2 = new ServiceHandler();
// Making a request to url and getting response
String jsonStr2 = sh2.makeServiceCall(url2, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr2);
JSONArray array2 = null;
try {
array2 = new JSONArray(jsonStr2);
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
ArrayList<String> latitudeList = new ArrayList<String>();
ArrayList<String> longitudeList = new ArrayList<String>();
for (int j = 0; j <array2.length(); j++){
JSONObject jsonObject2 = array2.getJSONObject(j);
JSONArray coordinates = jsonObject2.getJSONArray("coordinates");
latitude = coordinates.getString(0);
Log.d("latitude: ", "> " + latitude);
latitudeList.add(latitude);
longitude = coordinates.getString(1);
Log.d("longitude: ", "> " + longitude);
latitudeList.add(latitude);
longitudeList.add(longitude);
JSONObject shop = jsonObject2.getJSONObject("shop");
String logo_thumbnail_url = shop.getString("logo_thumbnail_url");
System.out.println("logo_thumbnail_url --->" + logo_thumbnail_url);
}
latList = latitudeList;
longList = longitudeList;
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result){
updatePlaces();
}
}
private void updatePlaces(){
userIcon = R.drawable.blue_point;
jewelleryIcon = R.drawable.pointeur;
if(theMap==null){
//map not instantiated yet
}
theMap = ((MapFragment)getFragmentManager().findFragmentById(R.id.the_map)).getMap();
if(theMap != null){
//ok - proceed
}
theMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
//update location
locMan = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location lastLoc = locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
double lat = lastLoc.getLatitude();
double lng = lastLoc.getLongitude();
LatLng lastLatLng = new LatLng(lat, lng);
//if(userMarker==null) userMarker.remove();
userMarker = theMap.addMarker(new MarkerOptions()
.position(lastLatLng)
.title("Vous êtes ici")
.icon(BitmapDescriptorFactory.fromResource(userIcon))
.snippet("Votre dernière position enregistrée"));
theMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(lat, lng), 7.5f), 4000, null);
String thelatitude;
String thelongtitude;
for (int i = 0; i < latList.size(); i++) {
thelatitude = latList.get(i);
thelongtitude = longList.get(i);
double latitudeFromString = Double.parseDouble(thelatitude);
double longitudeFromString = Double.parseDouble(thelongtitude);
LatLng SHOP = new LatLng(latitudeFromString, longitudeFromString);
bijouterie = theMap.addMarker(new MarkerOptions()
.position(SHOP)
.icon(BitmapDescriptorFactory.fromResource(jewelleryIcon)));
}
}
@Override
public void onBackPressed() {
finish();//go back to the previous Activity
overridePendingTransition(R.anim.backin, R.anim.backout);
}
}
日志猫：
01-05 15:52:12.389: W/dalvikvm(15320): threadid=1: thread exiting with uncaught exception (group=0x41d34300)
01-05 15:52:12.389: E/AndroidRuntime(15320): FATAL EXCEPTION: main
01-05 15:52:12.389: E/AndroidRuntime(15320): java.lang.IndexOutOfBoundsException: Invalid index 26, size is 26
01-05 15:52:12.389: E/AndroidRuntime(15320): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)
01-05 15:52:12.389: E/AndroidRuntime(15320): at java.util.ArrayList.get(ArrayList.java:304)
01-05 15:52:12.389: E/AndroidRuntime(15320): at com.begital.votrebijoutier.MapActivity.updatePlaces(MapActivity.java:272)
01-05 15:52:12.389: E/AndroidRuntime(15320): at com.begital.votrebijoutier.MapActivity.access$6(MapActivity.java:237)
01-05 15:52:12.389: E/AndroidRuntime(15320): at com.begital.votrebijoutier.MapActivity$GetJson.onPostExecute(MapActivity.java:232)
01-05 15:52:12.389: E/AndroidRuntime(15320): at com.begital.votrebijoutier.MapActivity$GetJson.onPostExecute(MapActivity.java:1)
01-05 15:52:12.389: E/AndroidRuntime(15320): at android.os.AsyncTask.finish(AsyncTask.java:631)
01-05 15:52:12.389: E/AndroidRuntime(15320): at android.os.AsyncTask.access$600(AsyncTask.java:177)
01-05 15:52:12.389: E/AndroidRuntime(15320): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
01-05 15:52:12.389: E/AndroidRuntime(15320): at android.os.Handler.dispatchMessage(Handler.java:99)
01-05 15:52:12.389: E/AndroidRuntime(15320): at android.os.Looper.loop(Looper.java:137)
01-05 15:52:12.389: E/AndroidRuntime(15320): at android.app.ActivityThread.main(ActivityThread.java:4745)
01-05 15:52:12.389: E/AndroidRuntime(15320): at java.lang.reflect.Method.invokeNative(Native Method)
01-05 15:52:12.389: E/AndroidRuntime(15320): at java.lang.reflect.Method.invoke(Method.java:511)
01-05 15:52:12.389: E/AndroidRuntime(15320): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-05 15:52:12.389: E/AndroidRuntime(15320): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-05 15:52:12.389: E/AndroidRuntime(15320): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：3)
在doInBackground方法中，您在纬度列表中添加两次次latitude次，而{{1>}只增加{{>>一次<{strong>时间longitude 1}}在经度列表中。
latitudeList.add(latitude);
longitude = coordinates.getString(1);
Log.d("longitude: ", "> " + longitude);
latitudeList.add(latitude); //<-- here why adding another time ?
在你做完之后：
latList = latitudeList;
longList = longitudeList;
我非常怀疑latList比longList长两倍，因此行IndexOutOfBoundsException中的thelongtitude = longList.get(i);因为你从{{1}循环而来} 0（两倍latList.size()}。
删除一个than longList.size()，这应该有效。
答案 1 :(得分：0)
for (int i = 0; i < latList.size(); i++) {
thelatitude = latList.get(i);
thelongtitude = longList.get(i);
这里的代码假设longList与latlist完全相同（或更长）。如果这个假设不正确，那么它将失败。