current position：Home>After the Android development database changes, the interface needs to be refreshed by clicking the button. I hope to refresh dynamically

After the Android development database changes, the interface needs to be refreshed by clicking the button. I hope to refresh dynamically

2022-01-27 03:35:17 【CSDN Q & A】

The phenomenon and background of the problem
Problem related code , Do not paste screenshots 
// Course display     public void ShowCou(View view) throws ExecutionException, InterruptedException {        List<Course> List = dbCourse.selectAllCourses();        ListView lv = find(R.id.couList);        lv.setAdapter(new CouAdapter(List,this) );    }
Operation results and error reporting contents
My solution ideas and tried methods
What I want to achieve


Refer to the answer 1：

Send a message when the database changes , Write a message on the page that needs to be updated , When receiving the update message, call the code of the update interface



Refer to the answer 2：


Refer to the answer 3：

What database ,sp Words , Look at the blog below
https://blog.csdn.net/BrcLi/article/details/90579513?ops_request_misc=&request_id=&biz_id=102&utm_term=%E5%AE%89%E5%8D%93%E7%9B%91%E5%90%ACsp%E7%9A%84%E5%AD%97%E6%AE%B5%E5%8F%98%E5%8C%96&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduweb~default-0-90579513.pc_search_em_sort&spm=1018.2226.3001.4187



Refer to the answer 4：


Refer to the answer 5：

If you use sqlite Words
It is recommended to use room coordination livedata You can easily meet the above requirements
Please refer to my previous blog jetpack Series articles
I use #CSDN# This app Found a technical blog , My friends ask for the same 《Jetpack：Room Ultra detailed guidelines for the use of stepping pits ！》, Let's have a look around https://blog.csdn.net/weixin_44235109/article/details/120252231?utm_source=app&app_version=4.20.0&code=app_1562916241&uLinkId=usr1mkqgl919blen
livedata guide
https://blog.csdn.net/weixin_44235109/article/details/120116205



Refer to the answer 6：

copyright notice
author[CSDN Q & A],Please bring the original link to reprint, thank you.
https://en.cdmana.com/2022/01/202201270335156154.html

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