Android onCreate method is called again after for a while

Question

After sometime (on background or front), activity oncreate method triggered again and again. No coming new intent, no refreshing the screen.

Previously I suspected on low memory.I thought that, Android operating system decides to close my application because of poor memory. So I wrote codes that loging memory size on "onSaveInstanceState" method. Because of every closing time, this method must be called.

After I read this log, this is not the memory situation. More than 1 gB available ram. So this issue is not related to memory situation.

So this is the question?

"Why and when is onCreate called after activity first open?

Answer 1

onCreate() is called only once, when an Activity is instantiated (created). If you are seeing this method called again, then your Activity (or the entire OS process hosting your app) has been killed and then later restarted.