呼叫 adapter.notifyDataSetChanged（）; 后出现在列表更改通知的ListView 该列表中的内容发生了变化。这必将解决这个错误。

 保护类GetTask扩展的AsyncTask＆LT;太虚，太虚，整数GT; {
公共接口TaskListener
{
公共无效updateResult（对象结果）;
}
私人TaskListener侦听器;
        @覆盖
        保护整数doInBackground（虚空...... PARAMS）{
            // TODO自动生成方法存根
            尝试{
                CallReceiveMsgAPIService（）;
            }赶上（例外五）{
            }
            返回0;
        }        @覆盖
        保护无效onPostExecute（整数结果）{
            // TODO自动生成方法存根
            super.onPostExecute（结果）;
            尝试{
                如果（发起！= 1）{
                    mMessageHandle.sendEmptyMessage（0）;
                    新GetTask（）执行（）;                    }
                }其他{          listener.updateResult（结果）;
                    //mLiveChatList.setAdapter(adapter）;
                    //adapter.notifyDataSetChanged（）;
                   // mLiveChatList.requestLayout（）;
                                      //警报（）;
                }
            }赶上（例外五）{
            }        }
    }
 

在活动实现这个接口TaskListener并在updateresult方法做code评论说。

I am working in one application where i am getting continuous response from server but when i change the page or moved to the other screen the application gets stop.I am receiving the response from server but it is not updating in listview.

I have used onResume and onPause method also but still i am receiving the error.

code;

protected class GetTask extends AsyncTask<Void, Void, Integer> {

        @Override
        protected Integer doInBackground(Void... params) {
            // TODO Auto-generated method stub
            try {
                CallReceiveMsgAPIService();
            } catch (Exception e) {
            }
            return 0;
        }

        @Override
        protected void onPostExecute(Integer result) {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
            try {
                if (initiate != 1) {
                    mMessageHandle.sendEmptyMessage(0);
                    new GetTask().execute();

                    }
                } else {


                    mLiveChatList.setAdapter(adapter);
                    adapter.notifyDataSetChanged();
                    mLiveChatList.requestLayout();
                                        alert();
                }
            } catch (Exception e) {
            }

        }
    }

error:

05-10 14:14:01.213: E/AndroidRuntime(277): FATAL EXCEPTION: main
05-10 14:14:01.213: E/AndroidRuntime(277): java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131361857, class android.widget.ListView) with Adapter(class com.$ChatListAdapter)]
05-10 14:14:01.213: E/AndroidRuntime(277):  at android.widget.ListView.layoutChildren(ListView.java:1492)
05-10 14:14:01.213: E/AndroidRuntime(277):  at android.widget.AbsListView.onTouchModeChanged(AbsListView.java:1960)
05-10 14:14:01.213: E/AndroidRuntime(277):  at android.view.ViewTreeObserver.dispatchOnTouchModeChanged(ViewTreeObserver.java:591)
05-10 14:14:01.213: E/AndroidRuntime(277):  at android.view.ViewRoot.ensureTouchModeLocally(ViewRoot.java:2021)
05-10 14:14:01.213: E/AndroidRuntime(277):  at android.view.ViewRoot.ensureTouchMode(ViewRoot.java:2005)
05-10 14:14:01.213: E/AndroidRuntime(277):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1774)
05-10 14:14:01.213: E/AndroidRuntime(277):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-10 14:14:01.213: E/AndroidRuntime(277):  at android.os.Looper.loop(Looper.java:123)
05-10 14:14:01.213: E/AndroidRuntime(277):  at android.app.ActivityThread.main(ActivityThread.java:4627)
05-10 14:14:01.213: E/AndroidRuntime(277):  at java.lang.reflect.Method.invokeNative(Native Method)
05-10 14:14:01.213: E/AndroidRuntime(277):  at java.lang.reflect.Method.invoke(Method.java:521)
05-10 14:14:01.213: E/AndroidRuntime(277):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-10 14:14:01.213: E/AndroidRuntime(277):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-10 14:14:01.213: E/AndroidRuntime(277):  at dalvik.system.NativeStart.main(Native Method)

could anybody get me out of this ..@Thanks

Call adapter.notifyDataSetChanged(); after there is a change in the list to notify the listView that the contents of list have changed. This will surely solve this error.

protected class GetTask extends AsyncTask<Void, Void, Integer> {
public interface TaskListener
{
public void updateResult(Object result);
}
private TaskListener listener;
        @Override
        protected Integer doInBackground(Void... params) {
            // TODO Auto-generated method stub
            try {
                CallReceiveMsgAPIService();
            } catch (Exception e) {
            }
            return 0;
        }

        @Override
        protected void onPostExecute(Integer result) {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
            try {
                if (initiate != 1) {
                    mMessageHandle.sendEmptyMessage(0);
                    new GetTask().execute();

                    }
                } else {

          listener.updateResult(result);
                    //mLiveChatList.setAdapter(adapter);
                    //adapter.notifyDataSetChanged();
                   // mLiveChatList.requestLayout();
                                      //  alert();
                }
            } catch (Exception e) {
            }

        }
    }

In activity implement this interface TaskListener and in the updateresult method do the code commented.