如何通过按回按钮刷新列表视图 - Android

Question

I have a ListView that is dynamic and will constantly change. The user selects an item and goes to a different activity.

What I want: When they hit back button and return to the ListView, I would like to call a certain action to refresh ListView (in my case an AsyncTask).

I have figured out one way to do this: By adding my refreshing code in onResume. But I find it refreshes a little too much -- I only want it to refresh when coming from the forward activities.

Answer 1

I have figured out one way to do this: By adding my refreshing code in onResume. But I find it refreshes a little too much -- I only want it to refresh when coming from the forward activities.

put your "refresh" code inside of onStart() instead of onResume() . onStart() gets "Called when the activity is becoming visible to the user." - Activity Lifecycle

Which means that it will happen only at the time that you activity gets put onto the screen.