Listview當項目點擊它會去另一個列表視圖

Question

所以在這裏我的問題我設置onitemclicklistener在listview1並使它，如果一個項目已經存在於訂單列表中，那麼數量會增加，但我的問題是我的問題是我的程序保持崩潰

這裏是我的代碼

MainActivity.java

public class MainActivity extends Activity { 
Database helper; 
ListView lv,lv2; 
ArrayAdapter<PostItemList> adapter; 
ArrayAdapter<PostInventory> adapterInventory; 
ArrayAdapter<PostOrder> adapterOrder; 
ArrayList<PostItemList> list; 
ArrayList<PostInventory> listInventory; 
ArrayList<PostOrder> listorder; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    helper = new Database(MainActivity.this); 
    lv = (ListView)findViewById(R.id.itemList); 
    lv2 = (ListView)findViewById(R.id.orderList); 
    list = helper.getAllData(); 
    adapter = new PostAdapterItemList(MainActivity.this,list); 
    lv.setAdapter(adapter); 
    listorder = new ArrayList<PostOrder>(); 

    lv.setOnItemClickListener(new OnItemClickListener() { 
    @Override 
    public void onItemClick(AdapterView<?> arg0, View arg1,final int pos, 
      long arg3) { 
     // TODO Auto-generated method stub 
     PostItemList getData = list.get(pos);   
     String parseData = getData.toStringOrder(); 
     String name[] = parseData.split(","); 

     int itemQuantity = Integer.parseInt(name[1]); 
     double itemPrice = Double.parseDouble(name[2]); 
     if (itemQuantity == 0){ 
      String output = name[0] + " is out of stock."; 
      Toast.makeText(getBaseContext(), output, Toast.LENGTH_LONG).show(); 
     } else { 

      itemQuantity = itemQuantity - 1;      
      String newQuantity = String.valueOf(itemQuantity); 
      helper.updateQuantity(name[0], newQuantity); 
      list.clear(); 
      list = helper.getAllData(); 
      adapter = new PostAdapterItemList(MainActivity.this, list); 
      lv.setAdapter(adapter); 
      int checker = 0; 
      if (listorder.isEmpty()){ 
       listorder.add(new PostOrder(name[0], "1", name[2])); 
       adapterOrder = new PostAdapterOrder(MainActivity.this,listorder); 
       lv2.setAdapter(adapterOrder); 
      } else if (listorder.size()>0){ 
       for(PostOrder order : listorder){ 
        if (name[0].contentEquals(order.getItemName())){ 
         String quantity = order.getItemQuantity(); 
         order.setItemQuantity(String.valueOf((Integer.parseInt(quantity))+1)); 
         adapterOrder.notifyDataSetChanged(); 
        } else { 
         checker = 1; 
        } 
       }       
      } 
      if (checker==1){ 
       listorder.add(new PostOrder(name[0], "1", name[1])); 
       adapterOrder = new PostAdapterOrder(MainActivity.this, listorder); 
       lv2.setAdapter(adapterOrder); 
      } 


     }      
    } 
}); 

} 

logcat的

10-11 00:05:13.190: D/dalvikvm(854): GC_FOR_ALLOC freed 57K, 5% free 3034K/3176K, paused 32ms, total 33ms 
10-11 00:05:13.190: I/dalvikvm-heap(854): Grow heap (frag case) to 3.646MB for 635812-byte allocation 
10-11 00:05:13.290: D/dalvikvm(854): GC_FOR_ALLOC freed 0K, 4% free 3655K/3800K, paused 22ms, total 22ms 
10-11 00:05:13.870: I/Choreographer(854): Skipped 73 frames! The application may be doing too much work on its main thread. 
10-11 00:05:13.950: D/gralloc_goldfish(854): Emulator without GPU emulation detected. 
10-11 00:05:14.230: I/Choreographer(854): Skipped 37 frames! The application may be doing too much work on its main thread. 
10-11 00:05:20.070: D/AndroidRuntime(854): Shutting down VM 
10-11 00:05:20.070: W/dalvikvm(854): threadid=1: thread exiting with uncaught exception (group=0xb3a67ba8) 
10-11 00:05:20.080: E/AndroidRuntime(854): FATAL EXCEPTION: main 
10-11 00:05:20.080: E/AndroidRuntime(854): Process: com.example.posv3, PID: 854 
10-11 00:05:20.080: E/AndroidRuntime(854): java.util.ConcurrentModificationException 
10-11 00:05:20.080: E/AndroidRuntime(854): at java.util.ArrayList$ArrayListIterator.next(ArrayList.java:573) 
10-11 00:05:20.080: E/AndroidRuntime(854): at com.example.posv3.MainActivity$1.onItemClick(MainActivity.java:71) 
10-11 00:05:20.080: E/AndroidRuntime(854): at android.widget.AdapterView.performItemClick(AdapterView.java:299) 
10-11 00:05:20.080: E/AndroidRuntime(854): at android.widget.AbsListView.performItemClick(AbsListView.java:1113) 
10-11 00:05:20.080: E/AndroidRuntime(854): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2904) 
10-11 00:05:20.080: E/AndroidRuntime(854): at android.widget.AbsListView$3.run(AbsListView.java:3638) 
10-11 00:05:20.080: E/AndroidRuntime(854): at android.os.Handler.handleCallback(Handler.java:733) 
10-11 00:05:20.080: E/AndroidRuntime(854): at android.os.Handler.dispatchMessage(Handler.java:95) 
10-11 00:05:20.080: E/AndroidRuntime(854): at android.os.Looper.loop(Looper.java:136) 
10-11 00:05:20.080: E/AndroidRuntime(854): at android.app.ActivityThread.main(ActivityThread.java:5017) 
10-11 00:05:20.080: E/AndroidRuntime(854): at java.lang.reflect.Method.invokeNative(Native Method) 
10-11 00:05:20.080: E/AndroidRuntime(854): at java.lang.reflect.Method.invoke(Method.java:515) 
10-11 00:05:20.080: E/AndroidRuntime(854): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
10-11 00:05:20.080: E/AndroidRuntime(854): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
10-11 00:05:20.080: E/AndroidRuntime(854): at dalvik.system.NativeStart.main(Native Method) 

Answer 1

如果你想從你的iteration

for(Iterator<MyAdapter> it = result.iterator(); it.hasNext();) { 
    MyAdapter s = it.next(); 
    if(s.getClientPoints().getPointsSpent() == 0) { 
     it.remove(); 
    } 
} 

Answer 2

人士Himanshu阿加瓦爾先生，謝謝你幫我刪除的項目。我解決問題，我的繼承人爲多數民衆贊成在上市的時候就已經存在的列表

for(PostOrder order : listorder){ 
         if (name[0].contentEquals(order.getItemName())){ 
          String quantity = order.getItemQuantity(); 
          order.setItemQuantity(String.valueOf((Integer.parseInt(quantity))+1)); 
          adapterOrder.notifyDataSetChanged();          
          break; 
         } else { 
          counter++; 
         } 
        }       
       }        
       if (counter == listorder.size()){ 
        listorder.add(new PostOrder(name[0], "1", name[1])); 
        adapterOrder = new PostAdapterOrder(MainActivity.this, listorder); 
        lv2.setAdapter(adapterOrder); 
       }