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[英]How to set AutocompleteTextView to perform only one filter search at a time and set a delay before starting the filtering?
[英]Android: AutoCompleteTextView and Filter - Typing Delay - Why?
好吧,伙計們,這讓我發瘋,我無法在互聯網上找到解決方案!
我做了一個新的Eclipse項目,並在里面粘貼了這個代碼:
https://developers.google.com/places/training/autocomplete-android
它可以工作,但是如果我輸入或刪除(a)字符,那么在鍵入它們時大多會有延遲(短暫凍結)並且建議 - 下拉消失並且大部分再次出現。
至於我的理解,過濾本身是異步完成的,因此來自后台線程,為什么短暫的凍結呢?
我的目標是在Google Play商店中擁有一個無凍結的AutoCompleteTextView。
所以你們有任何建議/解決方法來實現這一目標嗎?
您必須使用以下庫文件。您必須在AutoCompletetextView上調用addTextChangeListener(Listener)
。 在afterTextChanged(Editable s)
里面你必須提到你需要做的功能。
/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.text;
/**
* When an object of a type is attached to an Editable, its methods will
* be called when the text is changed.
*/
public interface TextWatcher extends NoCopySpan {
/**
* This method is called to notify you that, within <code>s</code>,
* the <code>count</code> characters beginning at <code>start</code>
* are about to be replaced by new text with length <code>after</code>.
* It is an error to attempt to make changes to <code>s</code> from
* this callback.
*/
public void beforeTextChanged(CharSequence s, int start,
int count, int after);
/**
* This method is called to notify you that, within <code>s</code>,
* the <code>count</code> characters beginning at <code>start</code>
* have just replaced old text that had length <code>before</code>.
* It is an error to attempt to make changes to <code>s</code> from
* this callback.
*/
public void onTextChanged(CharSequence s, int start, int before, int count);
/**
* This method is called to notify you that, somewhere within
* <code>s</code>, the text has been changed.
* It is legitimate to make further changes to <code>s</code> from
* this callback, but be careful not to get yourself into an infinite
* loop, because any changes you make will cause this method to be
* called again recursively.
* (You are not told where the change took place because other
* afterTextChanged() methods may already have made other changes
* and invalidated the offsets. But if you need to know here,
* you can use {@link Spannable#setSpan} in {@link #onTextChanged}
* to mark your place and then look up from here where the span
* ended up.
*/
public void afterTextChanged(Editable s);
}
我通過放置這些代碼行來解決它(請參閱注釋):
@Override
protected FilterResults performFiltering(CharSequence constraint)
{
FilterResults filterResults = new FilterResults();
// ADDED CODE: TO FIX ERROR "The content of the adapter has changed but ListView did not receive a notification":
ArrayList <String> resultListTemp = new ArrayList <String> ();
if (constraint != null)
{
// ADDED CODE: TO STOP TYPING DELAY & TO FIX ERROR: "The content of adapter has changed but ListView did not receive a notification"
if (conn != null)
{
conn.disconnect();
}
// CHANGED CODE: TO FIX ERROR "The content of the adapter has changed but ListView did not receive a notification":
resultListTemp.addAll(autocomplete(constraint.toString()));
filterResults.values = resultListTemp;
filterResults.count = resultListTemp.size();
}
return filterResults;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results)
{
// ADDED CODE: TO FIX ERROR "The content of the adapter has changed but ListView did not receive a notification":
resultList = (ArrayList <String>) results.values;
if (results != null && results.count > 0)
{
notifyDataSetChanged();
}
else
{
notifyDataSetInvalidated();
}
}
private ArrayList<String> autocomplete(String input)
{
// CHANGED CODE: TO FIX ERROR "The content of the adapter has changed but ListView did not receive a notification":
ArrayList<String> resultList = new ArrayList <String> ();
.....
.....
}
其中“conn”是用於獲取Google商家信息數據的HttpURLConnection。
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