夹住Tab时如何更新碎片数据 [英] how to update fragement data when swiching Tabs

问题描述

我正在使用材料"选项卡，而我使用了3个选项卡.

I am using Material Tab that I used 3 tabs.

标签A [产品列表]

Tab A [ Product List ]

具有回收列表和从远程服务器填充的数据.例如，它具有商品标题，图片和收藏夹图片

Has a Recycle list and data populating from remote Server. For ex, it has Product title, image and favorite image

标签B [收藏的产品列表]

Tab B [ Favorite Product List ]

Tab C [联系我们]

Tab C [ Contact Us ]

我尝试实现的功能，一旦用户选择收藏夹"按钮(添加到收藏夹)，该特定列表项就会显示在TAB_B [收藏的产品列表]中

What I try to implement, Once user select on favorite button ( add to favorite ) that particular list item show in TAB_B [ Favorite Product List ]

我使用了共享首选项，并将数据保存为Gson格式.我已经按照本教程进行学习

I have used shared preference and save data as Gson format. I have followed this tutorial

http://androidopentutorials.com/android如何在共享首选项中存储值列表

问题是，一旦我添加项目并从产品列表" [选项卡A]中删除项目，效果就很好，并且没有在选项卡B [收藏的产品列表]中显示.重新启动应用程序后，选项卡b中将显示收藏夹产品列表".我使用了一些技巧，例如广播接收器之类的东西，但是它不能正常工作.

The issue is, once I add Item and remove item from Product List [ Tab A ] perform well, and it is not showing at Tab B [ Favorite Product List ]. Once I restart the app Favorite Product List is showing at Tab b. I used some tricks like broadcast receivers kind of things but it is not working correctly.

我使用 it.neokree:MaterialTabs:0.11 库填充标签页

这是我使用过的一些代码.

Here is my some codes that I have been used.

请指导我，我做错了地方.

Please guide me, where I did wrong.

推荐答案

1. 在gradle文件中添加 compile'org.greenrobot:eventbus:3.0.0 '

2. 在每个片段中添加onCreate()

1. add compile 'org.greenrobot:eventbus:3.0.0' in gradle file

2. In every fragment add in onCreate()

        EventBus.getDefault().register(this);

在每个片段中添加onDestroyView

In every fragment add in onDestroyView

        EventBus.getDefault().unregister(this);

为事件创建Java类示例:

Create Java class for Event Example:

          public class EventUpdateList {

            private boolean listNeedUpdate= true;

            public EventUpdateList (boolean listNeedUpdate) {
                this.listNeedUpdate= listNeedUpdate;
            }

            public boolean isListNeedUpdate() {
                return listNeedUpdate;
            }

        }

在所有片段中添加

In all fragments add

   @Subscribe(threadMode = Main)
    public void onListRefresh(EventUpdatelist eventUpdateList) 
    {
       if (eventUpdateList.isNeedListUpdate) 
    {
    // refresh your list

    }

    } 

在您的活动中添加

In your activity add

EventBus.getDefault.post(new EventUpdateList(true));

所有3个片段都获取有关事件的信息以刷新列表.您甚至可以发布带有完整列表的Event来刷新(而不是此布尔值)，并分成3个片段.

And all 3 fragments getting information about event to refresh list. You can even post Event with full list to refresh instead of this boolean and get in 3 fragments.

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