如何在適配器或列表視圖上應用多個過濾器？

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我的ListView與公交車信息列表，我想申請的適配器或ListView中的多個過濾器，我已經做了ListView中實時搜索過濾器，如何在適配器或列表視圖上應用多個過濾器？

這裏是我的活動：

public class FilterListActivity extends Activity implements TextWatcher { 

    private static List<Country> countries = Storage.getItems(); 
    private EditText editTextFilter; 
    private ListView listViewCountries; 
    private CountryListAdapter adapter; 


    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     adapter = new CountryListAdapter(this, countries); 

     editTextFilter = (EditText)findViewById(R.id.editTextFilter); 
     editTextFilter.addTextChangedListener(this); 

     listViewCountries = (ListView)findViewById(R.id.listViewCountries); 
     listViewCountries.setAdapter(adapter); 
    } 

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

    @Override 
    public void afterTextChanged(Editable s) {} 

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

}

以下是我的屏幕視圖