OnListItemClickを繰り返し実行するとAndroidでStackOverflowErrorが発生するのはなぜですか？

私はリストビューを持っています。OnListItemClickを繰り返し実行するとAndroidでStackOverflowErrorが発生するのはなぜですか？

protected void onListItemClick(ListView l, View v, int position, long id) { 
    // TODO Auto-generated method stub 
    super.onListItemClick(l, v, position, id); 

    Cursor cursor = (Cursor) lAdapter.getItem(position); 
    final String lpn = cursor.getString(cursor 
     .getColumnIndex(SQLHelper.EMPLOYEE_LPN)); 
    System.out.println("EMPLOYEE_LPN : " + lpn); 
    final Context con = this; 

    final ProgressDialog empDialog = ProgressDialog.show(this, "", "Loading Employee Details ...."); 
    empDialog.setIcon(R.drawable.icon64); 
    empDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); 
    empDialog.show(); 

    Thread mBackground = new Thread() { 

     @Override 
     public void run() { 


     try{ 
     // preparing a looper on current thread the current thread is being detected implicitly  
       Looper.prepare(); 
       DirectoryApp appState = (DirectoryApp) getApplicationContext(); 
      Object[][] requestArray = new Object[][] {{"lpn",lpn}}; 
      SOAPHelper soapHelper = new SOAPHelper(); 
      String result = soapHelper.getHttpTransportResponse(
       appState.getNAMESPACE_DIRECTORY(), "", 
       appState.getMETHOD_NAME_GET_EMPLOYEE_DETAILS(), appState.getURL_EYDIRECTORY_SERVICE(), requestArray); 

      if(result.equals("")){ 
       Toast.makeText(ListContacts.this, getString(R.string.connErr), 
        Toast.LENGTH_LONG).show(); 
      } 
      else{ 
        Intent intentEmp = new Intent(con, 
        EmployeeDetails.class); 
       intentEmp.putExtra("result", 
        result); 
       startActivity(intentEmp); 

      } 
      empDialog.dismiss(); 
      handler.sendEmptyMessage(1); 

     } 
     catch (Exception e) { 
      empDialog.dismiss(); 
      Bundle bundle = new Bundle(); 
      bundle.putInt("flag", 0); 
      Message message = new Message(); 
      message.setData(bundle); 
      handler.sendMessage(message); 
     } 

     } 

    }; 

    // start the background thread 
    mBackground.start(); 
    Looper.loop(); 


    } 


    private Handler handler = new Handler() { 

    @Override 
    public void handleMessage(Message msg) { 

     super.handleMessage(msg); 

     int flag = msg.getData().getInt("flag"); 
     switch (flag) { 
     case 0: 
      Toast.makeText(ListContacts.this, getString(R.string.connErr), 
       Toast.LENGTH_LONG).show(); 
      break; 
     case 1: 
      break; 
     default: 
      Toast.makeText(ListContacts.this, getString(R.string.connErr), 
       Toast.LENGTH_LONG).show(); 
     } 

    } 
};

と例外は以下のとおりです：意図はと呼ばれているリストビューをクリックして..しかし、私は繰り返しOnListItemClickを実行すると、にStackOverflowErrorがスローされている間

私のコードがある

07-27 12:39:38.566: ERROR/AndroidRuntime(6694): FATAL EXCEPTION: main 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694): java.lang.StackOverflowError 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.View.draw(View.java:6739) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1648) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.AbsListView.dispatchDraw(AbsListView.java:1365) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.ListView.dispatchDraw(ListView.java:3046) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.View.draw(View.java:6845) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.AbsListView.draw(AbsListView.java:2257) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1648) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.View.draw(View.java:6742) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1648) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.View.draw(View.java:6742) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.FrameLayout.draw(FrameLayout.java:352) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1648) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1646) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.View.draw(View.java:6742) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.FrameLayout.draw(FrameLayout.java:352) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.drawChild(ViewGroup.java:1648) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1375) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.View.draw(View.java:6742) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.FrameLayout.draw(FrameLayout.java:352) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1872) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewRoot.draw(ViewRoot.java:1449) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewRoot.performTraversals(ViewRoot.java:1194) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1771) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Looper.loop(Looper.java:144) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at org.sipdroid.sipua.ui.ListContacts.onListItemClick(ListContacts.java:381) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.app.ListActivity$2.onItemClick(ListActivity.java:345) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.AdapterView.performItemClick(AdapterView.java:284) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.ListView.performItemClick(ListView.java:3382) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.AbsListView$PerformClick.run(AbsListView.java:1696) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Handler.handleCallback(Handler.java:587) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Handler.dispatchMessage(Handler.java:92) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Looper.loop(Looper.java:144) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at org.sipdroid.sipua.ui.ListContacts.onListItemClick(ListContacts.java:381) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.app.ListActivity$2.onItemClick(ListActivity.java:345) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.AdapterView.performItemClick(AdapterView.java:284) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.ListView.performItemClick(ListView.java:3382) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.AbsListView$PerformClick.run(AbsListView.java:1696) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Handler.handleCallback(Handler.java:587) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Handler.dispatchMessage(Handler.java:92) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Looper.loop(Looper.java:144) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at org.sipdroid.sipua.ui.ListContacts.onListItemClick(ListContacts.java:381) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.app.ListActivity$2.onItemClick(ListActivity.java:345) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.AdapterView.performItemClick(AdapterView.java:284) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.ListView.performItemClick(ListView.java:3382) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.widget.AbsListView$PerformClick.run(AbsListView.java:1696) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Handler.handleCallback(Handler.java:587) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Handler.dispatchMessage(Handler.java:92) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at android.os.Looper.loop(Looper.java:144) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at org.sipdroid.sipua.ui.ListContacts.onListItemClick(ListContacts.java:381) 
07-27 12:39:38.566: ERROR/AndroidRuntime(6694):  at

出典

2011-07-27 jennifer

にStackOverflowError：それはジョエル・スポルスキと彼の同僚のAndroid :-)でイースターエッグを植えている（このコミュニティのクリエイターを）です – dbm

は、私は答えを持っている：

@Override 
public void run() { 
try { 
// preparing a looper on current thread 
// the current thread is being detected implicitly 
Looper.prepare(); 
// now, the handler will automatically bind to the 
// Looper that is attached to the current thread 
// You don't need to specify the Looper explicitly 
handler = new Handler(); 
// After the following line the thread will start 
// running the message loop and will not normally 
// exit the loop unless a problem happens or you 
// quit() the looper (see below) 
Looper.loop(); 
} catch (Throwable t) { 
Log.e(TAG, "halted due to an error", t); 
} 
}

出典

2011-07-29 07:23:00 jennifer

私はあなたのLooper.loop()コールが間違ったスレッドで実行されていると思います。それはonListItemClick()メソッドにありますので、 'foreground'スレッドのコンテキストで実行しています。そのため、onListItemClick()は返されず、その後の呼び出しによってスタックが構築されます。

catch節の直前に、mBackgroundスレッドのrun()メソッドにあるべきだと思います。

また、Looperの使用についてはあまりよく分かりませんが、どこで終了するのかわかりません。Looper。

出典

2011-07-27 13:34:33

OnListItemClickを繰り返し実行するとAndroidでStackOverflowErrorが発生するのはなぜですか？

答えて

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