# Background\_tasks

- [Send operations to modiple threads](/project/android_dev-51/guides/coretopics-he-xin-hua-ti/background_tasks/send-operations-to-modiple-threads.md)
- [Communicate with the  UI thread](/project/android_dev-51/guides/coretopics-he-xin-hua-ti/background_tasks/send-operations-to-modiple-threads/communicate-with-the-ui-thread.md)
