android - Handler.post(Runnable r) 和 Activity.runOnUiThread(Runnable r) 的区别

Question

这个问题在这里已经有了答案:

What's the difference between Activity.runOnUiThread(runnable action) and Handler.post()? (3 个回答)

关闭 4年前。

有没有区别

new Handler.post(Runnable r);

和

activity.runOnUiThread(Runnable r)

Answer 1

来自官方Handler文档

处理程序

处理程序有两个主要用途:

(1) To schedule messages and runnables to be executed as some point inthe future.

(2) To enqueue an action to be performed on a different thread thanyour own.

简而言之，Handler就是用来管理不同的Runnables的。

runOnUiThread

It is used to execute the non-UI operation on the UI Thread, exampleif you want to update the screen from AsyncTask's doInBackground()you have to write the part of code that update's the UI inside therunOnUiThread(). But again that will block the UI.