Question

我有项目列表，并希望为其实现搜索功能。因此，我有一个带有addTextChangedListener的文本框。

搜索结果正常，但是当我尝试将结果设置为ListView时，新结果会附加到旧结果中。

我正在使用Lazy Adapter。如何清除适配器的旧结果？

以下是代码：

ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
ArrayList<HashMap<String, String>> searchResults = new ArrayList<HashMap<String, String>>();
 searchText = (EditText) findViewById(R.id.searchText);

 //Count from the server 
 int count = dataCount();

for (int i = 0; i < dataCount; i++) 
{
    HashMap<String, String> map = new HashMap<String, String>();

    // adding data to HashMap key => value
    map.put(KEY_ID, trackNumber);
    map.put(KEY_TITLE, trackTitle);
    map.put(KEY_ARTIST, trackArtist);
    map.put(KEY_DURATION, trackDuration);
    map.put(KEY_THUMB_URL, trackAlbumArt);

    // adding HashList to ArrayList
    songsList.add(map);

}

adapter=new LazyAdapter(this, songsList);        
list.setAdapter(adapter);

TextWatcher

 nameText.addTextChangedListener(new TextWatcher() 
    {
        public void afterTextChanged(Editable s)
        {

        }

        public void beforeTextChanged(CharSequence s, int start, int count, int after)
        {

        }

        public void onTextChanged(CharSequence s, int start, int before, int count)
        {

            getSong(s);
        }

    });

获得结果：

  Map getSong(CharSequence s) 
  {

    for (HashMap<String, String> map : songsList)
    {
        if(map.get(KEY_TITLE).contains(s))
        {
            Log.e("Map","Son"+map);

            HashMap<String, String> map2 = new HashMap<String, String>();
            // adding each child node to HashMap key => value
            map2.put(KEY_ID, map.get(KEY_ID));
            map2.put(KEY_TITLE, map.get(KEY_TITLE));
            map2.put(KEY_ARTIST, map.get(KEY_ARTIST));
            map2.put(KEY_DURATION, map.get(KEY_DURATION));
            map2.put(KEY_THUMB_URL, map.get(KEY_THUMB_URL));

            searchResults.add(map2);            
        }
    }

    adapter=new LazyAdapter(this, searchResults);
    list.setAdapter(adapter);
    adapter.notifyDataSetChanged();

    return Collections.emptyMap();
    }

谢谢！

Answer 1

你不是＆＃34;清洁＆＃34;开始之前的旧搜索结果。

添加以下行：

searchResults = new ArrayList<HashMap<String, String>>();

在方法getSong()的开头（在for循环之前）

在android中更新搜索结果到Lazy Adapter

1 个答案: