/// <summary>
 /// 启动 progress dialog.
 /// </summary>
 /// <param name="context">Context.</param>
 /// <param name="msg">Message.</param>
 public static void StartProgressDialog(Activity activity, string msg, bool canceleable = false)
 {
     progressDialog = CustomProgressDialog.createDialog(activity);
     progressDialog.Window.SetGravity(GravityFlags.Center);
     progressDialog.SetMessage(msg);
     progressDialog.Show();
     progressDialog.SetCancelable(canceleable);
 }
		/// <summary>
		/// 启动 progress dialog.
		/// </summary>
		/// <param name="context">Context.</param>
		/// <param name="msg">Message.</param>
		public static void StartProgressDialog(Activity activity,string msg,bool canceleable =false)
		{
			progressDialog = CustomProgressDialog.createDialog (activity);
			progressDialog.Window.SetGravity (GravityFlags.Center); 
			progressDialog.SetMessage (msg);
			progressDialog.Show ();
			progressDialog.SetCancelable (canceleable);

		}