webview의 progressDialog 적용했는데요...
바탕색이 검은색인데 투명이나 색깔 변경 방법 부탁드립니다.

mWebView.setWebViewClient(new QingdaoViewClient(){            
   public void onLoadResource (WebView view, String url) {                
    if (progressDialog == null) {                    
     progressDialog = new ProgressDialog(activity); 
     progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
     progressDialog.setMessage("Data Loading");                     
     progressDialog.show();                
    }            
   }              
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