一个匿名的 runnable 防止 Android 垃圾收集它定义的 activity
An anonymous runnable prevents Android from garbage-collecting the activity in which it's defined
在阅读the example时，我注意到作者在MyActivity中创建了Runnable task。如果我关闭 activity，系统将无法对其进行垃圾回收，因为 runnable 包含对 MyActivity 的隐式引用，对吧？只要 runnable 有效，activity 就会存在。
如有错误请指正
似乎正确。
来自你的link（虽然说的是AsyncTask，不是匿名的Runnable）：
if it is an inner class of your Activity/Fragment, it holds an implicit reference to it, which is bad practice, because Activity/Fragment can be destroyed on configuration change, but they will be kept in memory while worker thread is alive; if it is declared as standalone or static inner class and you are using reference to a Context to update views, you should always check whether it is null or not"
在阅读the example时，我注意到作者在MyActivity中创建了Runnable task。如果我关闭 activity，系统将无法对其进行垃圾回收，因为 runnable 包含对 MyActivity 的隐式引用，对吧？只要 runnable 有效，activity 就会存在。
如有错误请指正
似乎正确。
来自你的link（虽然说的是AsyncTask，不是匿名的Runnable）：
if it is an inner class of your Activity/Fragment, it holds an implicit reference to it, which is bad practice, because Activity/Fragment can be destroyed on configuration change, but they will be kept in memory while worker thread is alive; if it is declared as standalone or static inner class and you are using reference to a Context to update views, you should always check whether it is null or not"