Android：當我點擊十字按鈕時，searchView不會刪除文本

Question

這是searchView和listView的圖片。 當我開始搜索實例標題：Adeeieva它更新listView。 但是當我點擊十字按鈕時，它不會將listView掛在那裏。 我想要的是，當我點擊十字按鈕時，它會重新創建listView並引入其初始狀態。 有人可以幫我嗎？

public class MainActivity extends ActionBarActivity { 

    ListView listView; 
    Books booksObj; 
    BooksAdapter booksAdapter; 
    BooksAdapter_1 mBooksAdapter; 
    String url="http://google.com"; 
    Gson gson; 
    AsyncHttpClient client; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     listView=(ListView)findViewById(R.id.listView); 
     client=new AsyncHttpClient(); 
     client.get(MainActivity.this, url, new AsyncHttpResponseHandler() { 
      @Override 
      public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) { 
       String responsestr=new String(responseBody); 
       gson=new Gson(); 

       booksObj=gson.fromJson(responsestr, Books.class); 

       mBooksAdapter= new BooksAdapter_1(MainActivity.this, booksObj.getBooks()); 
       listView.setAdapter(mBooksAdapter); 
      } 

      @Override 
      public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) { 

      } 
     }); 

     listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 

       TextView description=(TextView)view.findViewById(R.id.book_description); 
       TextView title_= (TextView) view.findViewById(R.id.book_title); 
       TextView isbn_= (TextView) view.findViewById(R.id.book_isbn); 



       String _title=title_.getText().toString(); 
       String _isbn=isbn_.getText().toString(); 
       String _description=description.getText().toString(); 

       Intent myIntent = new Intent(MainActivity.this, ResultActivity.class); 
       myIntent.putExtra("title", _title); 
       myIntent.putExtra("isbn", _isbn); 
       myIntent.putExtra("description", _description); 

       startActivity(myIntent); 

      } 
     }); 

     SearchView sv= (SearchView)findViewById(R.id.search); 
     sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() { 
      @Override 
      public boolean onQueryTextSubmit(String query) { 
       return false; 
      } 

      @Override 
      public boolean onQueryTextChange(String query) { 
       mBooksAdapter.getFilter().filter(query); 

       return false; 
      } 
     }); 

    } 

} 

BookAdapter_1

public class BooksAdapter_1 extends BaseAdapter implements Filterable { 
    private List<Books.BooksEntity> mBooksitem; 
    private LayoutInflater inflater; 
    private Context mContext; 
    BooksFilter mBooksFilter; 

    public BooksAdapter_1(Context context, List<Books.BooksEntity> mBooksitem){ 
     this.mContext= context; 
     this.mBooksitem= mBooksitem; 
    } 

    @Override 
    public int getCount() { 
     return mBooksitem.size(); 
    } 

    @Override 
    public Object getItem(int position) { 
     return mBooksitem.get(position); 
    } 

    @Override 
    public long getItemId(int position) { 
     return 0; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     LayoutInflater inflater=(LayoutInflater)mContext 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     View rowView=inflater.inflate(R.layout.book_layout_item, parent, false); 

     Books.BooksEntity item=(Books.BooksEntity)getItem(position); 
     TextView id=(TextView)rowView.findViewById(R.id.book_id); 
     TextView title=(TextView)rowView.findViewById(R.id.book_title); 
     TextView description=(TextView)rowView.findViewById(R.id.book_description); 
     TextView isbn=(TextView)rowView.findViewById(R.id.book_isbn); 
     ImageView book_url=(ImageView)rowView.findViewById(R.id.book_url); 

     id.setText(String.valueOf(item.getId())); 
     title.setText("Title: "+item.getTitle()); 
     description.setText("Description: "+item.getDescription()); 
     isbn.setText("isbn: "+item.getIsbn()); 

     String imageUrl=item.getCover_url(); 
     Picasso.with(mContext).load(imageUrl).into(book_url); 

     return rowView; 
    } 

    @Override 
    public Filter getFilter() { 
     if(mBooksFilter==null) 
      mBooksFilter= new BooksFilter(); 
     return mBooksFilter; 
    } 

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

      FilterResults results= new FilterResults(); 

      if(constraint==null || constraint.length()==0){ 
       results.values=mBooksitem; 
       results.count=mBooksitem.size(); 
      } else { 
       ArrayList<Books.BooksEntity> filteredBooks= new ArrayList<Books.BooksEntity>(); 

       for(Books.BooksEntity b: mBooksitem){ 
        if(b.getDescription().toUpperCase().contains(constraint.toString().toUpperCase())){ 
         filteredBooks.add(b); 
        } 
       } 
       results.values=filteredBooks; 
       results.count=filteredBooks.size(); 
      } 

      return results; 
     } 

     @Override 
     protected void publishResults(CharSequence constraint, FilterResults results) { 
      mBooksitem=(ArrayList<Books.BooksEntity>) results.values; 
      notifyDataSetChanged(); 


     } 
    } 

} 

Answer 1

你必須申報的關閉（X）按鈕的動作。

如果您想清除搜索文本，您可以將設置爲「」 =無「」。

您也可以重置自定義適配器過濾和通知它的東西已經改變，在這種情況下，搜索查詢。

sv.setOnCloseListener(new OnCloseListener() { 
      @Override 
      public boolean onClose() { 

      sv.setQuery("", false); 

      mBooksAdapter.getFilter().filter(sv.getQuery()); 

      mBooksAdapter.notifyDataSetChanged(); 

      return false; 
      } 
     });