What is the difference between runOnUiThread method and Handler? Which one is the best to use?

问题

I usually use the method

 runOnUiThread (new Runnable () {

     @Override
     public void run () {

     }

 });

to launch some prcess in the main thread. just recently I discovered this one

new Handler(Looper.getMainLooper()).post(new Runnable () {

    @Override
    public void run () {
        // this will run in the main thread
    }

});

My question is what is the difference between the two methods and which one is the best to use?

回答1:

Both are actually same. Both runOnUiThread and Handler#post runs the passed Runnable in the UI Thread.

FYI, you can also execute any Runnable on UI Thread with the help of any View by calling the method View#post(runnable).

Since all approaches uses Handler internally, all are same and there won't be any difference in using any of these.

来源：https://stackoverflow.com/questions/52152906/what-is-the-difference-between-runonuithread-method-and-handler-which-one-is-th