/** 关闭对话框 */
 protected void dismissPostingDialog() {
   if (mPostingdialog == null || !mPostingdialog.isShowing()) {
     return;
   }
   mPostingdialog.dismiss();
   mPostingdialog = null;
 }
 protected void showProcessDialog() {
   if (mPostingdialog != null && mPostingdialog.isShowing()) {
     return;
   }
   mPostingdialog = new ECProgressDialog(MeetingBaseActivity.this, R.string.login_posting_submit);
   mPostingdialog.show();
 }
  protected void showCustomProcessDialog(String content) {

    if (mPostingdialog != null && mPostingdialog.isShowing()) {
      return;
    }

    mPostingdialog = new ECProgressDialog(MeetingBaseActivity.this, content);
    mPostingdialog.show();
  }