Question

我接受用户的地址，然后尝试获取我使用AsyncTask的经度和纬度。

每次我收到：RuntimeException: An error occured while executing doInBackground()

在此行遇到异常：Address fetchedAddress = addresses.get(0);

日志：

E/AndroidRuntime(810): FATAL EXCEPTION: AsyncTask #2
E/AndroidRuntime(810): Process: app.android.fields, PID: 810
E/AndroidRuntime(810): java.lang.RuntimeException: An error occured while executing doInBackground()
E/AndroidRuntime(810):  at android.os.AsyncTask$3.done(AsyncTask.java:300)
E/AndroidRuntime(810):  at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
E/AndroidRuntime(810):  at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
E/AndroidRuntime(810):  at java.util.concurrent.FutureTask.run(FutureTask.java:242)
E/AndroidRuntime(810):  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
E/AndroidRuntime(810):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
E/AndroidRuntime(810):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
E/AndroidRuntime(810):  at java.lang.Thread.run(Thread.java:841)
E/AndroidRuntime(810): Caused by: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
E/AndroidRuntime(810):  at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
E/AndroidRuntime(810):  at java.util.ArrayList.get(ArrayList.java:308)
E/AndroidRuntime(810):  at app.android.users.MainActivity$RegisterUser.doInBackground(MainActivity.java:326)
E/AndroidRuntime(810):  at app.android.users.MainActivity$RegisterUser.doInBackground(MainActivity.java:1)
E/AndroidRuntime(810):  at android.os.AsyncTask$2.call(AsyncTask.java:288)
E/AndroidRuntime(810):  at java.util.concurrent.FutureTask.run(FutureTask.java:237)
E/AndroidRuntime(810):  ... 4 more

代码：

@Override
            protected String doInBackground(String... args) {

                ............

                strNewClientCompleteAddress = 
                    strNewClientAddress+" "+strNewClientCity+" "+" "+strNewClientState+" "+strNewClientPostalCode;
                Log.v("strNewClientCompleteAddress:",strNewClientCompleteAddress);


                Geocoder geocoder= new Geocoder(MainActivity.this);

                try {                                                
                    List<Address> addresses = geocoder.getFromLocationName(strNewClientCompleteAddress, 1);                           
                    if(addresses != null) {                            
                        Address fetchedAddress = addresses.get(0);
                        lat = fetchedAddress.getLatitude();
                        lng = fetchedAddress.getLongitude();
                        Log.v("try-if", "ok great work");                       
                    }
                    else {                      
                        Log.v("try-else", "something wrong");                       
                    }

                    }
                    catch (IOException e) {
                             // TODO Auto-generated catch block
                        e.printStackTrace();                                    
                        Log.v("catch", "Could not get address....!");                       
                    }                           

                strLat = String.valueOf(lat);
                Log.v("lat:", strLat);
                strLng = String.valueOf(lng);
                Log.v("lng:", strLng);

               ........................
           }

更新代码：

..............
if((addresses != null) && (addresses.size() > 0)) {                
    Address fetchedAddress = addresses.get(0);
    lat = fetchedAddress.getLatitude();
    lng = fetchedAddress.getLongitude();
    Log.v("try-if", "ok great work");                       
}
..............

日志：

V/strNewClientCompleteAddress:(1119): 1701 Amphitheatre Pkwy Mountain View  CA 94043
V/try-else(1119): something wrong
V/lat:(1119): 0.0
V/lng:(1119): 0.0

Answer 1

尝试检查addresses.size() > 0

 if ((addresses != null) && (addresses.size() > 0)) {
   Address address=addresses.get(0);
 }

Answer 2

addresse数组大小为零。这意味着您的地址数组不包含任何值，并且您尝试获取数组值的第一个位置。

从数组中获取值之前需要检查null和size，如下所示

 if(addresses!=null && addresses.size()>0)
 { 
 Address fetchedAddress = addresses.get(0);
 }else
  {
       return yourcondition; 
   }

RuntimeException：执行doInBackground（）时发生错误

2 个答案: