在列表視圖中獲取搜索數據的問題

我已經在customadapter類中實現了可篩選，並且我能夠通過listview進行搜索，但是當我清空搜索框時，我的列表仍顯示最後一個搜索應用程序，而不是整個應用程序列表。在列表視圖中獲取搜索數據的問題

mainactivity.java

public class MainActivity extends ListActivity { 
List<ApplicationInfo> appList; 
ListAdapter listAdapter; 
PackageManager packageManager; 
Process suProcess; 
DataOutputStream os; 
ApplicationInfo info; 
EditText search; 
ArrayList<ApplicationInfo> applist; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    packageManager = getPackageManager(); 
    new LoadApplication().execute(); 

    search = (EditText) findViewById(R.id.searchView); 
    search.addTextChangedListener(new TextWatcher() { 
     @Override 
     public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
     } 

     @Override 
     public void onTextChanged(CharSequence s, int start, int before, int count) { 
      listAdapter.getFilter().filter(s.toString()); 
     } 

     @Override 
     public void afterTextChanged(Editable s) { 

     } 
    }); 
} 
}

我已經加入我的過濾器類。

private class ListFilter extends Filter { 
    @Override 
    protected FilterResults performFiltering(CharSequence constraint) { 
     FilterResults results = new FilterResults(); 
     if (constraint == null || constraint.length() == 0) { 
      results.values = applist; 
      results.count = applist.size(); 
     } else { 
      ArrayList<ApplicationInfo> info = new ArrayList<ApplicationInfo>(); 

      for (ApplicationInfo c : applist) { 
       if (c.loadLabel(packageManager).toString().toUpperCase().contains(constraint.toString().toUpperCase())) { 
        info.add(c); 
       } 
      } 
      results.values = info; 
      results.count = info.size(); 
     } 
     return results; 
    } 

    @Override 
    protected void publishResults(CharSequence constraint, FilterResults results) { 
     if (results.count == 0) { 
      notifyDataSetInvalidated(); 
     } else { 
      applist = (List<ApplicationInfo>) results.values; 
      notifyDataSetChanged(); 
     } 
    } 
}

並覆蓋了getFilter（）方法。

public Filter getFilter() { 

    if (filter == null) 
    { 
     filter=new ListFilter(); 
    } 
    return filter; 
}

來源

2017-04-09 Rahul

，因爲我是新來的這...可以請你給我看看一些啓動代碼 – Rahul

添加搜索您需要添加過濾器像下面的代碼：

private class ItemFilter extends Filter { 
     @Override 
     protected FilterResults performFiltering(CharSequence constraint) { 

      String filterString = constraint.toString().toLowerCase(); 

      FilterResults results = new FilterResults(); 

      final List<String> list = originalData; 

      int count = list.size(); 
      final ArrayList<String> nlist = new ArrayList<String>(count); 

      String filterableString ; 

      for (int i = 0; i < count; i++) { 
       filterableString = list.get(i); 
       if (filterableString.toLowerCase().contains(filterString)) { 
        nlist.add(filterableString); 
       } 
      } 

      results.values = nlist; 
      results.count = nlist.size(); 

      return results; 
     } 

     @SuppressWarnings("unchecked") 
     @Override 
     protected void publishResults(CharSequence constraint, FilterResults results) { 
      filteredData = (ArrayList<String>) results.values; 
      notifyDataSetChanged(); 
     } 

    }

按照以下鏈接，並在適配器中添加過濾器：

Filtering ListView with custom (object) adapter

來源

2017-04-09 07:48:42

我一直聽說這個方法很多...但是如何實現它... Stuart認爲我是新手他和幫助 – Rahul

按照上面添加的鏈接。 –

thanx chetan ,,,現在我可以搜索，但是當我清空我的搜索框，我得到整個列表填充，它仍然顯示最後的搜索結果。 – Rahul

在列表視圖中獲取搜索數據的問題

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