在对话框中的 ListView 中获取数据时出错？
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【中文标题】在对话框中的 ListView 中获取数据时出错？【英文标题】：Error while fetching data in ListView in dialog box? 【发布时间】：2016-04-22 00:29:03 【问题描述】：我正在尝试通过 ListView 中的 JSON 获取数据。现在的问题是当Dialog 第一次打开时，它显示ListView 的数据正确，但是当我关闭Dialog 并尝试再次打开它时，它给了我错误。
错误是：
java.lang.IllegalStateException：适配器的内容发生了变化，但ListView没有收到通知。确保适配器的内容不是从后台线程修改的，而只是从 UI 线程修改的。确保您的适配器在其内容更改时调用 notifyDataSetChanged()
我正在从 AsyncTast 的 UI 线程修改我的适配器，并且我还从 UI 线程调用 notifyDataSetChanged() 方法。但是不知道为什么第二次打开我的对话框给我错误。
那么我该如何解决这个问题呢？
这是我的 AsyncTast 的 onPostExecute 方法：
@Override
protected void onPostExecute(String result)
super.onPostExecute(result);
pDialog.dismiss();
planlist.clear();
applist.clear();
try
JSONObject obj = new JSONObject(result);
String errCode = obj.getString("errCode");
if(errCode.equalsIgnoreCase("-1"))
JSONObject object = obj.getJSONObject("scheme");
JSONObject object1 = object.getJSONObject("mobile");
String state = object1.getString("state");
String operator = object1.getString("operator");
String operator_imag = object1.getString("operator_img");
System.out.println("lenghtsima>>>>"+(object1.length()-3)+"");
numberOfPlans = (object1.length())-3;
for(int i = positionInNumber; i<=positionInNumber;i++)
// System.out.println("Object>>>>"+object1.length()+" objectdata>>"+object1.getJSONObject(Integer.toString(i)));
JSONObject object2 = object1.getJSONObject(Integer.toString(i));
String plan_name = object2.getString("plan_name");
String plan_id = object2.getString("plan_id");
String operator_plan_id = object2.getString("operator_plan_id");
app_detail = new HashMap<String, String>();
app_detail.put("plan_name",plan_name);
app_detail.put("plan_id",plan_id);
app_detail.put("operator_plan_id", operator_plan_id);
applist.add(app_detail);
JSONArray jsonArray = object2.getJSONArray("planlists");
for(int j = 0; j<jsonArray.length();j++)
// System.out.println("ARRAY>>"+jsonArray.length()+" jsonarray="+jsonArray.toString());
JSONObject object3 = jsonArray.getJSONObject(j);
JSONObject object4 = object3.getJSONObject("OpreatorPlan");
String amount = object4.getString("amount");
String id = object4.getString("id");
String description = object4.getString("description");
String validity = object4.getString("talk_time");
String recommend_flag = object4.getString("recommend_flag");
plan_details = new HashMap<String, String>();
plan_details.put("amount",amount);
plan_details.put("id",id);
plan_details.put("description",description);
plan_details.put("validity",validity);
plan_details.put("recommend_flag",recommend_flag);
planlist.add(plan_details);
System.out.println("apppppp=" + planlist.toString());
dialog();
catch (Exception e)
e.printStackTrace();
这是我的适配器：
private class Adapterr extends BaseAdapter
ArrayList<HashMap<String, String>> list1;
Context context;
public Adapterr(Context context,ArrayList<HashMap<String, String>> applist)
this.list1 = applist;
this.context = context;
@Override
public int getCount()
return list1.size();
@Override
public Object getItem(int position)
return list1.get(position);
@Override
public long getItemId(int position)
return position;
@Override
public View getView(final int position, View convertView, ViewGroup parent)
final LayoutInflater inflater = getLayoutInflater();
final MyViewHolderTwo myViewHolderTwo;
if(convertView==null)
convertView = inflater.inflate(R.layout.operator_plans,parent,false);
myViewHolderTwo = new MyViewHolderTwo(convertView);
convertView.setTag(myViewHolderTwo);
else
myViewHolderTwo = (MyViewHolderTwo) convertView.getTag();
HashMap<String, String> map = list1.get(position);
String amount = map.get("amount");
// String id = map.get("id");
String description = map.get("description");
String validity = map.get("validity");
// String recommend_flag = map.get("recommend_flag");
myViewHolderTwo.amount.setText(amount);
myViewHolderTwo.validity.setText(validity);
myViewHolderTwo.description.setText(description);
return convertView;
private class MyViewHolderTwo
TextView amount,validity,description;
public MyViewHolderTwo(View item)
amount = (TextView)item.findViewById(R.id.amount);
validity = (TextView)item.findViewById(R.id.validity);
description = (TextView)item.findViewById(R.id.description);
这是我的对话：
public void dialog()
dlg = new Dialog(BrowseOperatorsPlans.this);
dlg.requestWindowFeature(Window.FEATURE_NO_TITLE);
dlg.setContentView(R.layout.browse_operator_plans_dialog);
TextView dialog_header = (TextView)dlg.findViewById(R.id.dialog_header_title);
ImageView close = (ImageView)dlg.findViewById(R.id.close_dialog);
listView1 = (ListView)dlg.findViewById(R.id.listview_horizontal);
adapterr = new Adapterr(getBaseContext(),planlist);
listView1.setAdapter(adapterr);
adapterr.notifyDataSetChanged();
// listView1.requestLayout();
close.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
dlg.dismiss();
);
dlg.getWindow().setLayout(WindowManager.LayoutParams.MATCH_PARENT, 500);
dialog_header.setText("Select Plan");
dlg.getWindow().setBackgroundDrawable(
new ColorDrawable(
android.graphics.Color.TRANSPARENT));
dlg.show();
这是我的日志：
01-16 18:47:21.302 30604-30604/com.example.admin.smsrupee E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.admin.smsrupee, PID: 30604
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. Make sure your adapter calls notifyDataSetChanged() when its content changes. [in ListView(2131558551, class android.widget.ListView) with Adapter(class com.example.admin.smsrupee.BrowseOperatorsPlans$Adapter)]
at android.widget.ListView.layoutChildren(ListView.java:1565)
at android.widget.AbsListView.onTouchUp(AbsListView.java:3843)
at android.widget.AbsListView.onTouchEvent(AbsListView.java:3604)
at android.view.View.dispatchTouchEvent(View.java:7782)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2316)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2013)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2322)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2027)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2322)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2027)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2322)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2027)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2322)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2027)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2322)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2027)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2322)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2027)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2322)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2027)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2109)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1541)
at android.app.Activity.dispatchTouchEvent(Activity.java:2491)
at android.support.v7.internal.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:60)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2057)
at android.view.View.dispatchPointerEvent(View.java:7973)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4549)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4420)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3966)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4016)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3985)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4092)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3993)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4149)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3966)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4016)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3985)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3993)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3966)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6298)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6261)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6215)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6443)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:138)
at android.os.Looper.loop(Looper.java:150)
at android.app.ActivityThread.main(ActivityThre
01-16 18:48:10.828 30604-30676/com.example.admin.smsrupee D/dalvikvm: threadid=15: exiting
01-16 18:48:10.829 30604-30676/com.example.admin.smsrupee D/dalvikvm: threadid=15: detach (group=0x4183bce0)
01-16 18:48:10.829 30604-30676/com.example.admin.smsrupee D/dalvikvm: threadid=15: removing from list
01-16 18:48:10.830 30604-30676/com.example.admin.smsrupee D/dalvikvm: threadid=15: bye!
01-16 18:52:21.343 30604-30604/com.example.admin.smsrupee I/P
【问题讨论】：
从这些日志的外观来看，UI线程上都没有发生。您是否尝试过使用 runonuithread 内置方法？ 【参考方案1】：问题是你在你的Adapterr 类中一直引用你的planlist，所以当你调用planlist.clear() 方法时，就会抛出这个异常。因此，当您每次调用 dialog() 方法时都实例化适配器时，您可以避免在 Adapterr 类中保留对 planlist 的引用，例如，如下所示：
public Adapterr(Context context,ArrayList<HashMap<String, String>> applist)
this.list1 = new ArrayList<HashMap<String, String>>(applist);
this.context = context;
它应该按预期工作
【讨论】：
【参考方案2】：在onPostExecute 试试这个：
new Handler().post(new Runnable()
@Override
public void run()
dialog();
);
希望对你有帮助
【讨论】：
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