public abstract View getDecorView () Added in API level 1 Retrieve the top-level window decor view (containing the standard window frame/decorations and the client's content inside of that), which can be added as a window to the window manager. Note that calling this function for the first time "locks in" various window characteristics as described in

    /**      * 显示 进度对话框      * @param message 消息      * @param cancel 是否可取消      * @param textsize 字体大小      */     protected final void showProgressDialog(String message,boolean cancel,int textsize)     {         // TODO Auto-generated method stub         mProgress = new ProgressDialog(this);         mProgress.setMessage(message);         mProgress.setCancelable(cancel);         mProgress.setOnCancelListener(null);         mProgress.show();         setDialogFontSize(mProgress,textsize);     }     private void setDialogFontSize(Dialog dialog,int size)     {         Window window = dialog.getWindow();         View view = window.getDecorView();         setViewFontSize(view,size);     }     private void setViewFontSize(View view,int size)     {         if(view instanceof ViewGroup)         {             ViewGroup parent = (ViewGroup)view;             int count = parent.getChildCount();             for (int i = 0; i < count; i++)             {                 setViewFontSize(parent.getChildAt(i),size);             }         }         else if(view instanceof TextView){             TextView textview = (TextView)view;             textview.setTextSize(size);         }     }