我在android Pull to refresh listview.Its工作正常，但在刷新listview时，我正在尝试向下滚动列表。我收到此错误：
这是我的代码：
public void Callpagedetails() {
try
{
URL = http://history_thread.php?token_id=" + Token + "&p=" + page_count;
Log.d("TAG", "API URL IS " + URL);
HttpClient mHttpClient = new DefaultHttpClient();
HttpGet mGetMethod = new HttpGet(URL);
HttpResponse mReponseMessage = mHttpClient.execute(mGetMethod);
String Response = EntityUtils.toString(mReponseMessage.getEntity());
Log.d("TAG", "O/P Response is " + Response);
JSONArray responseObject = new JSONArray(Response);
for(int i=0; i < responseObject.length(); i++)
{
obj = responseObject.getJSONObject(i);
listhashmap = new HashMap<String, Object>();
listhashmap.put("text",obj.getString("text"));
here i am storing the item in arraylist arraylistitems
}
}
catch(Exception e)
{
System.out.println(e);
}
}
arraylistitems是ArrayList<HashMap<String, Object>> arraylistitems;
其中Callpagedetails()是我获取数据的方法
01-20 18:22:17.755: E/InputEventReceiver(23393): Exception dispatching input event.
01-20 18:22:17.755: E/MessageQueue-JNI(23393): Exception in MessageQueue callback: handleReceiveCallback
01-20 18:22:17.775: E/MessageQueue-JNI(23393): java.lang.IndexOutOfBoundsException: Invalid index 9, size is 1
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at java.util.ArrayList.get(ArrayList.java:304)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.widget.HeaderViewListAdapter.isEnabled(HeaderViewListAdapter.java:164)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.widget.AbsListView.onTouchEvent(AbsListView.java:3816)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at com.listview.HistoryListView.onTouchEvent(HistoryListView.java:316)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at com.listview.HistoryListView.onInterceptTouchEvent(HistoryListView.java:380)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1827)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1886)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1886)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1886)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1886)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1886)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2113)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1466)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.app.Activity.dispatchTouchEvent(Activity.java:2436)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2061)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.View.dispatchPointerEvent(View.java:7425)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3376)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3308)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4402)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4380)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4484)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.os.MessageQueue.nativePollOnce(Native Method)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.os.MessageQueue.next(MessageQueue.java:125)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.os.Looper.loop(Looper.java:124)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at android.app.ActivityThread.main(ActivityThread.java:4918)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at java.lang.reflect.Method.invokeNative(Native Method)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at java.lang.reflect.Method.invoke(Method.java:511)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
01-20 18:22:17.775: E/MessageQueue-JNI(23393): at dalvik.system.NativeStart.main(Native Method)
01-20 18:22:17.785: E/AndroidRuntime(23393): FATAL EXCEPTION: main
01-20 18:22:17.785: E/AndroidRuntime(23393): java.lang.IndexOutOfBoundsException: Invalid index 9, size is 1
01-20 18:22:17.785: E/AndroidRuntime(23393): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)
01-20 18:22:17.785: E/AndroidRuntime(23393): at java.util.ArrayList.get(ArrayList.java:304)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.widget.HeaderViewListAdapter.isEnabled(HeaderViewListAdapter.java:164)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.widget.AbsListView.onTouchEvent(AbsListView.java:3816)
01-20 18:22:17.785: E/AndroidRuntime(23393): at com.listview.HistoryListView.onTouchEvent(HistoryListView.java:316)
01-20 18:22:17.785: E/AndroidRuntime(23393): at com.listview.HistoryListView.onInterceptTouchEvent(HistoryListView.java:380)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1827)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1886)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1886)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1886)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1886)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1886)
01-20 18:22:17.785: E/AndroidRuntime(23393): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2113)
01-20 18:22:17.785: E/AndroidRuntime(23393): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1466)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.app.Activity.dispatchTouchEvent(Activity.java:2436)
01-20 18:22:17.785: E/AndroidRuntime(23393): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2061)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.View.dispatchPointerEvent(View.java:7425)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3376)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3308)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4402)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4380)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4484)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.os.MessageQueue.nativePollOnce(Native Method)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.os.MessageQueue.next(MessageQueue.java:125)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.os.Looper.loop(Looper.java:124)
01-20 18:22:17.785: E/AndroidRuntime(23393): at android.app.ActivityThread.main(ActivityThread.java:4918)
01-20 18:22:17.785: E/AndroidRuntime(23393): at java.lang.reflect.Method.invokeNative(Native Method)
01-20 18:22:17.785: E/AndroidRuntime(23393): at java.lang.reflect.Method.invoke(Method.java:511)
01-20 18:22:17.785: E/AndroidRuntime(23393): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
01-20 18:22:17.785: E/AndroidRuntime(23393): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
01-20 18:22:17.785: E/AndroidRuntime(23393): at dalvik.system.NativeStart.main(Native Method)
有人可以帮助我吗？感谢。
答案 0 :(得分：3)
我没有尝试，但确定它可能对你有所帮助。
JSONArray responseObject = new JSONArray(Response);
listhashmap = new HashMap<String, Object>();
for(int i=0; i < responseObject.length(); i++)
{
obj = responseObject.getJSONObject(i);
listhashmap.put("text",obj.getString("text"));
}
答案 1 :(得分：0)
您不应该在非UI线程中触摸适配器的数据。
您的doInBackground()似乎将适配器可能使用的计数设置为零，并且还猜测Callpagedetails()会直接修改适配器使用的数据。
相反，修改UI线程中的适配器数据。 onPostExecute()是个好地方。
答案 2 :(得分：0)
在Callpagedetails上，查看instanced responseObject之后的for循环。
保留初始listhashmap。这就是listhashmap大小为1的原因。将新的HashMap替换为外部for循环。
for (int i = 0; i < responseObject.length(); i++) {
obj = r esponseObject.getJSONObject(i);
listhashmap = new HashMap < String, Object > (); // problems code
listhashmap.put("text", obj.getString("text"));
}
答案 3 :(得分：0)
受保护的类RefreshTask扩展了AsyncTask＆gt;＆gt; {
@Override
protected ArrayList<HashMap<String, Object>> doInBackground(Void... params) {
// TODO Auto-generated method stub
page_count = 0;
ArrayList<HashMap<String, Object>> data=Callpagedetails();
return data;
}
protected void onPostExecute(ArrayList<HashMap<String, Object>> result) {
super.onPostExecute(result);
if(result!=null)
{
adapterfirst = new Questionadapter(historylist.this,result);
listviewfirst = (RefeshListView) findViewById(R.id.listquestion);
listviewfirst.setAdapter(adapterfirst);
adapterfirst.notifyDataSetChanged();
}
yourlistView.postDelayed(new Runnable() {
@Override
public void run() {
new RefreshTask().execute();
}
}, 1000);
}
}
}
嗨Priya！试试这个程序！将对象传递给onpostExecute作为参数始终是一种好方法！希望这能解决你的问题！
答案 4 :(得分：0)
这可能不准确。但请尝试相应地修改，
public void Callpagedetails() {
try
{
URL = http://history_thread.php?token_id=" + Token + "&p=" + page_count;
Log.d("TAG", "API URL IS " + URL);
HttpClient mHttpClient = new DefaultHttpClient();
HttpGet mGetMethod = new HttpGet(URL);
HttpResponse mReponseMessage = mHttpClient.execute(mGetMethod);
String Response = EntityUtils.toString(mReponseMessage.getEntity());
Log.d("TAG", "O/P Response is " + Response);
JSONArray responseObject = new JSONArray(Response);
for(int i=0; i < responseObject.length(); i++)
{
obj = responseObject.getJSONObject(i);
}
}
catch(Exception e)
{
System.out.println(e);
}
}
，并在您的
doInBackground() {
....
CallPageDetails();
}
和
onPostExecute() {
if(yourListView!=null) {
listhashmap = new HashMap<String, Object>();
listhashmap.put("text",obj.getString("text"));
here YOU WILL BE storing the item in arraylist arraylistitems
&& also set,
yourAdapter.notifyDataSetChanged();
}
.....
.....
}
* - ＆GT;尝试自己的风险。
答案 5 :(得分：0)
arraylist hold object refrence所以你的列表只保留最后一个值，因为你是同一个内存位置的新对象。
for (int i = 0; i < responseObject.length(); i++) {
obj = r esponseObject.getJSONObject(i);
listhashmap = new HashMap < String, Object > (); // problems code
listhashmap.put("text", obj.getString("text"));
}
替换为
for (int i = 0; i < responseObject.length(); i++) {
obj = r esponseObject.getJSONObject(i);
**HashMap<String, Object> listhashmap = new HashMap<String, Object>();**
listhashmap.put("text",obj.getString("text"));
here i am storing the item in arraylist arraylistitems
rraylistitem.put(listhashmap);
}