android：ListActivity，自定义适配器

我正在尝试为列表活动创建自定义适配器，以便为每个操作显示不同的图像。我得到以下错误。android：ListActivity，自定义适配器

Error: The method getView(int, View, ViewGroup) of type 
ClientOperations.MyCustomAdapter must override or implement a supertype method

有人能帮我吗。

public class ClientOperations extends ListActivity { 

    public class MyCustomAdapter extends ArrayAdapter<String> { 

     public MyCustomAdapter(Context context, int textViewResourceId, String[] objects) { 
     super(context, textViewResourceId, objects); 
     // TODO Auto-generated constructor stub 
     } 

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

     LayoutInflater inflater=getLayoutInflater(); 
     View row=inflater.inflate(R.layout.clientoperations, parent, false); 
     TextView op=(TextView)row.findViewById(R.id.operation); 
     op.setText(operation[position]); 
     ImageView icon=(ImageView)row.findViewById(R.id.icon); 

     if (operation[position] == "Share"){ 
      icon.setImageResource(R.drawable.filesharing); 
     } else if(operation[position] == "Remove"){ 
      icon.setImageResource(R.drawable.remove); 
     } else if(operation[position] == "Exit"){ 
      icon.setImageResource(R.drawable.logout); 
     } else { 
      icon.setImageResource(R.drawable.viewshare); 
     } 

     return row; 
     } 
    } 

    String username = null; 
    String[] operation = new String[] { "Share", "Servershare", "Usershare", "Myshare", 
      "Remove", "Exit"}; 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     //setContentView(R.layout.clientoperations); 

     Bundle extras = getIntent().getExtras(); 
     if(extras !=null) 
     { 
      username = extras.getString("username"); 
     }   

     // Use your own layout and point the adapter to the UI elements which 
     // contains the label 
     this.setListAdapter(new ArrayAdapter<String>(this, R.layout.clientoperations, 
       R.id.operation, operation)); 
    } 

    @Override 
    protected void onListItemClick(ListView l, View v, int position, long id) { 
     super.onListItemClick(l, v, position, id); 
     // Get the item that was clicked 
     Object o = this.getListAdapter().getItem(position); 
     String keyword = o.toString(); 
     Toast.makeText(this, "You selected: " + keyword, Toast.LENGTH_LONG) 
       .show(); 

    } 
} 

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"> 
    <ImageView android:id="@+id/icon" 
    android:layout_height="wrap_content" 
    android:src="@drawable/icon" 
    android:layout_width="22px" 
    android:layout_marginTop="10px" 
    android:layout_marginRight="7px" 
    android:layout_marginLeft="7px"> 
    </ImageView> 
    <TextView android:text="@+id/TextView01" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:textSize="25dp" 
    android:textStyle="bold" 
    android:typeface="sans" 
    android:id="@+id/operation" 
    android:layout_marginTop="10px">  
    </TextView> 
</LinearLayout>

来源

2011-10-21 Android_enthusiast