/**
* 对话框
*/
private static ProgressDialog mProgressDialog;
/**
* 默认的对话框
* 标题、内容、两个按钮
* @param context
* @param title
* @param content
* @param btnOKStr 是空字符的话 该按钮不显示 (特别注意)
* @param btnCancelStr 是空字符的话 该按钮不显示
* @param onClick
*/
public static void showDefaultDialog(Context context,String title,String content,
   String btnOKStr,String btnCancelStr,OnClickListener onClick){
  showDefaultDialog(context, title, content, btnOKStr, btnCancelStr, onClick, null);
}
/**
* 默认的对话框 + cancel事件
* @param context
* @param title
* @param content
* @param btnOKStr
* @param btnCancelStr
* @param onClick
* @param onCancel
*/
public static void showDefaultDialog(Context context,String title,String content,
   String btnOKStr,String btnCancelStr,
   OnClickListener onClick,OnCancelListener onCancel){
  AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);
  if(title != null){
   mBuilder.setTitle(title);
  }
  mBuilder.setMessage(content);
  if(btnOKStr == null)
   btnOKStr = "确定";
  if(btnCancelStr == null)
   btnCancelStr = "取消";
  if(!btnOKStr.trim().equals(""))
   mBuilder.setPositiveButton(btnOKStr, onClick);
  if(!btnCancelStr.trim().equals(""))
   mBuilder.setNegativeButton(btnCancelStr, onClick);
  if(onCancel != null){
   mBuilder.setOnCancelListener(onCancel);
  }
  mBuilder.show();
}
public static void showProgressDialog(Context context,String msg,boolean cancelable) {
//  dismissProgressDialog();
  mProgressDialog = new ProgressDialog(context);
  mProgressDialog.setMessage(msg);
  mProgressDialog.setCancelable(cancelable);
  mProgressDialog.show();
}
public static void dismissProgressDialog(){
  if (mProgressDialog != null && mProgressDialog.isShowing()) {
   mProgressDialog.dismiss();
   mProgressDialog = null;
  }
}