有很多方法可以做到，其中一些已被弃用，一些为您的应用程序增加了不必要的复杂性.我会给你一些我最喜欢的简单选项:

There are so many ways to do it, some of them are deprecated, some add unnecessary complexitiy to you app. I'm gonna give you few simple options that i like the most:

• 构建一个新线程或线程池，执行繁重的工作并使用主循环程序的处理程序更新 UI:

• Build a new thread or thread pool, execute the heavy work and update the UI with a handler for the main looper:

  Executors.newSingleThreadExecutor().execute(() -> {

      //Long running operation

      new Handler(Looper.getMainLooper()).post(() -> {
          //Update ui on the main thread
      });
  });   

  MutableLiveData<Double> progressLiveData = new MutableLiveData<>();

  progressLiveData.observe(this, progress -> {
      //update ui with result
  });

  Executors.newSingleThreadExecutor().execute(() -> {

      //Long running operation

      progressLiveData.postValue(progress);
  });