setViewBinder/setViewValue和getView/LayoutInflater的用法有什麼區別？

Question

看起來有兩種可能的方式來改變的東西在ListView行：

1. 使用setViewBinder/setViewValue：

   myCursor.setViewBinder（新SimpleCursorAdapter.ViewBinder（）{

   @Override 
       public boolean setViewValue(View view, Cursor cursor, int columnIndex) { 
       int viewId = view.getId(); 
       switch(viewId) { 
       case R.id.icon: 
        // change something related to the icon here 
   

2. 使用getView/LayoutInflater：

   公共查看getView（INT位置，查看convertView，ViewGroup以及母公司）{

   View itemView = null; 
   
       if (convertView == null) { 
        LayoutInflater inflater = (LayoutInflater) parent.getContext() 
          .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
        itemView = inflater.inflate(R.layout.list_row, null); 
       } else { 
        itemView = convertView; 
       } 
   
       ImageView imgViewChecked = (ImageView) itemView 
         .findViewById(R.id.icon); 
       // change something related to the icon here 
   

的是這兩種方法之間的區別？

Answer 1

您可以使用它們來完成相同的任務。 SimpleCursorAdapter添加了ViewBinder系統，使您更容易，因此您不必編寫整個getView代碼。

public View getView(int position, View convertView, ViewGroup parent) { 
    if (!mDataValid) { 
    throw new IllegalStateException(
     "this should only be called when the cursor is valid"); 
    } 
    if (!mCursor.moveToPosition(position)) { 
    throw new IllegalStateException("couldn't move cursor to position " 
     + position); 
    } 
    View v; 
    if (convertView == null) { 
    v = newView(mContext, mCursor, parent); 
    } else { 
    v = convertView; 
    } 
    bindView(v, mContext, mCursor); 
    return v; 
} 


public void bindView(View view, Context context, Cursor cursor) { 
    final ViewBinder binder = mViewBinder; 
    final int count = mTo.length; 
    final int[] from = mFrom; 
    final int[] to = mTo; 

    for (int i = 0; i < count; i++) { 
    final View v = view.findViewById(to[i]); 
    if (v != null) { 
     boolean bound = false; 
     if (binder != null) { 
     bound = binder.setViewValue(v, cursor, from[i]); 
     } 

     if (!bound) { 
     String text = cursor.getString(from[i]); 
     if (text == null) { 
      text = ""; 
     } 

     if (v instanceof TextView) { 
      setViewText((TextView) v, text); 
     } else if (v instanceof ImageView) { 
      setViewImage((ImageView) v, text); 
     } else { 
      throw new IllegalStateException(
       v.getClass().getName() 
        + " is not a " 
        + " view that can be bounds by this SimpleCursorAdapter"); 
     } 
     } 
    } 
    } 
} 

：其實，SimpleCursorAdapter只是通過調用setViewValue方法（與標準的樣板錯誤檢查和沿充氣）

我已經附加了Android的源代碼SimpleCursorAdapter用來getView實施實現getView