异步操作结果返回慢，使用回调解决问题。

Posted 2023-02-13 十壹、

异步操作结果返回慢，比如你上面调用了，但是结果还没返回的话，你下面得到的就是老的数据。解决方法，要么设置个回调，要么就在界面类中直接调用接口，返回结果中重新设置文本。
举一个调取数量接口的例子
userNumber和notInGroupNumber是两个数量。在上面用int有定义。在类调用返回数据记得先implements这个TotalListener监听。然后要把返回的数据set进去。PC就要开启线程去setText。不然会设置无效。

	public interface TotalListener	
    	void totalListener(int userNum, int groupNum);
    
    
    public void getTotal(String fkDomain, TotalListener totalListener) 
        String baseUrl = ApiGatewayUtils.getApiGatewayUrl();
        Retrofit retrofit = HttpClient.getInstance().createRetroft(baseUrl);
        RequestServes service = retrofit.create(RequestServes.class);
        service.getToal(fkDomain).enqueue(new Callback<BaseResponse<GroupTeamTotal>>() 

            @Override
            public void onResponse(Call<BaseResponse<GroupTeamTotal>> call,
                Response<BaseResponse<GroupTeamTotal>> response) 
                // TODO Auto-generated method stub
                BaseResponse<GroupTeamTotal> baseResponse = response.body();
                if (baseResponse != null && baseResponse.getResult() != null && totalListener !=null) 
                    userNumber = baseResponse.getResult().getUserNumber();
                    notInGroupNumber = baseResponse.getResult().getNotInGroupNumber();
                    totalListener.totalListener(userNumber, notInGroupNumber);
                
            

            @Override
            public void onFailure(Call<BaseResponse<GroupTeamTotal>> call, Throwable t) 
                // TODO Auto-generated method stub
                t.printStackTrace();
            

        );

    

	@Override
    public void totalListener(int userNum, int groupNum) 
    	 this.userNum = userNum;
    	 this.groupNum = groupNum; 	
    	 Display.getDefault().syncExec(new Runnable() 
			
			@Override
			public void run() 
				// TODO Auto-generated method stub
				for (int i = 0; i < buttons.size(); i++) 
		             String text = "全部员工(" + userNum + ")";
		             if (orgType == 2) 
		                 text = "全部成员(" + userNum + ")";
		             
		             if (i == 1) 
		                 text = "未加入部门员工(" + groupNum + ")";
		                 if (orgType == 2) 
		                     text = "未加入部门成员(" + groupNum + ")";
		                 
		             
		             buttons.get(i).setText(text);
		         
			
		);