在自定義列表視圖如何篩選數據

Question

本文是我的代碼

public class adapters extends Activity implements TextWatcher{ 
    /** Called when the activity is first created. */ 
    ListView lv1; 
    e E; 
    EditText e1; 
    LinearLayout ll1; 
    LinearLayout ll2; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     ll1.setBackgroundColor(color.transparent); 
     e1=(EditText)findViewById(R.id.e1); 

    lv1=(ListView)findViewById(R.id.lv1); 
     ArrayList<AdapterObject> obj = new ArrayList<AdapterObject>(); 

     AdapterObject adp; 
     for(int i =0;i<5;i++){ 

      adp = new AdapterObject(); 
      adp.setBmp(getResources().getDrawable(R.drawable.trees)); 
      adp.setStr("Text "+String.valueOf(i)); 
      obj.add(adp); 
     } 

     E = new e(this,2,obj); 


     lv1.setAdapter(E); 
     lv1.setTextFilterEnabled(true); 

     e1.addTextChangedListener(this); 




    } 




    @Override 
    public void afterTextChanged(Editable s) { 
     // TODO Auto-generated method stub 

    } 


    @Override 
    public void beforeTextChanged(CharSequence s, int start, int count, 
      int after) { 
     // TODO Auto-generated method stub 


    } 


    @Override 
    public void onTextChanged(CharSequence s, int start, int before, int count) { 
     // TODO Auto-generated method stub 
System.out.println(E.getItem(1)); 
     E.getFilter().filter(e1.getText().toString(), new Filter.FilterListener() { 

      @Override 
      public void onFilterComplete(int count) { 
       // TODO Auto-generated method stub 

       System.out.println("tututututu"); 
       E.notifyDataSetChanged(); 

      }}); 
     } 
    } 






//here is the adapterobject class 


public class AdapterObject { 

    Drawable bmp; 
    String str; 
    public Drawable getBmp() { 
     return bmp; 
    } 
    public void setBmp(Drawable bmp) { 
     this.bmp = bmp; 
    } 
    public String getStr() { 
     return str; 
    } 
    public void setStr(String str) { 
     this.str = str; 
    } 


} 




//here is class e 
public class e extends ArrayAdapter<AdapterObject> { 


ArrayList<AdapterObject> Obj; 

    Context mContext; 
    public e(Context context, int textViewResourceId, 
      ArrayList<AdapterObject> objects) { 
     super(context, textViewResourceId, objects); 
     mContext=context; 
     Obj=objects; 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     // TODO Auto-generated method stub 

     LayoutInflater l = (LayoutInflater) (mContext).getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     View v = l.inflate(R.layout.new21, null); 
     ImageView btn = (ImageView) v.findViewById(R.id.list_button); 
     TextView text = (TextView)v.findViewById(R.id.list_text); 
     btn.setBackgroundDrawable(Obj.get(position).getBmp()); 
     text.setText(Obj.get(position).getStr()); 
     System.out.println("here"); 
     return v; 
      } 

    @Override 
    public AdapterObject getItem(int position) { 
     // TODO Auto-generated method stub 
     return super.getItem(position); 
    } 

Answer 1

edit=(EditText)findViewById(R.id.editText1); 
edit.addTextChangedListener(filterTextWatcher); 

private TextWatcher filterTextWatcher =new TextWatcher() 
{ 
public void afterTextChanged(Editable s) { 
    mlist.getFilter().filter(edit.getText().toString()); 

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

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


public class CustomAdapter extends ArrayAdapter<Employee> { 
     private ImageButton img; 
     private ArrayList<Employee> items; 
     private ArrayList<Employee> dupItems; 
     public ArrayList<Employee> filtered; 
     private Activity currActivity; 
     public Employee emp; 
     private EmpService empSer; 
     private Filter filter; 

      public CustomAdapter(Activity context, int textViewResourceId, ArrayList<Employee> empList) { 
       super(context, textViewResourceId, empList); 
       currActivity = context; 
       this.filtered=empList; 
       this.items = filtered; 
       setNotifyOnChange(true); 
       empSer = new EmpService(); 
       emp=new Employee(); 

       } 

     public int getCount() 
     { 
      return items.size(); 
     } 

     public View getView(int position, View convertView, ViewGroup parent) { 
       View view = convertView; 
       if (view == null) { 
        LayoutInflater vi = (LayoutInflater) currActivity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
        view = vi.inflate(R.layout.result, null); 
       } 
      emp = items.get(position); 
      view.setId(emp.empId); 
     if (emp != null) { 
     TextView id = (TextView) view.findViewById(R.id.textView1); 
     TextView name = (TextView) view.findViewById(R.id.textView2); 
     TextView com = (TextView) view.findViewById(R.id.textView3); 
     TextView joindate = (TextView) view.findViewById(R.id.textView4); 
     img = (ImageButton) view.findViewById(R.id.imageButton1); 
     if (id != null) { 
      id.setText(" "+emp.empId); 
      } 
     if(name != null){ 
      name.setText(" "+emp.empName); 
      } 
     if(com != null){ 
      com.setText(" "+emp.company); 
      } 
     if(joindate != null){ 
      joindate.setText(" "+emp.joinDate); 

      } 

return view; 
} 
public void notifyDataSetInvalidated() 
{ 
    super.notifyDataSetInvalidated(); 
} 
    @Override 
      public Filter getFilter() 
      { 
       if(filter == null) 
        filter = new MangaNameFilter(); 
       return filter; 
      } 
      private class MangaNameFilter extends Filter 
      { 

       @Override 
       protected FilterResults performFiltering(CharSequence constraint) { 
        // NOTE: this function is *always* called from a background thread, and 
        // not the UI thread. 
        constraint = edit.getText().toString().toLowerCase(); 
        FilterResults result = new FilterResults(); 
        if(constraint != null && constraint.toString().length() > 0) 
        { 
         empList=empSer.GetAllDetails(); 
         items=empList; 
         ArrayList<Employee> filt = new ArrayList<Employee>(); 
         ArrayList<Employee> lItems = new ArrayList<Employee>(); 
         synchronized(this) 
         { 
          lItems.addAll(items); 
         } 
         for(int i = 0, l = lItems.size(); i < l; i++) 
         { 
          Employee m = lItems.get(i); 
          if(m.empName.toLowerCase().contains(constraint)||m.joinDate.toLowerCase().contains(constraint)|| m.company.contains(constraint)) 
          filt.add(m); 
         } 
         result.count = filt.size(); 
         result.values = filt; 
        } 
        else 
        { 
         empList=empSer.GetAllDetails(); 
         items=empList; 
         synchronized(this) 
         { 
          result.count = items.size(); 
          result.values = items; 
         } 
        } 
        return result; 
       } 
       @SuppressWarnings("unchecked") 
       @Override 
       protected void publishResults(CharSequence constraint, FilterResults result) { 
        // NOTE: this function is *always* called from the UI thread. 

        filtered = (ArrayList<Employee>)result.values; 
        mlist=new CustomAdapter(currActivity, R.layout.result, filtered); 
        list.setAdapter(mlist); 
} 
}