Android prevent restart activity after startActivity

Question

I have a problem with startActivity() methods.

Problem Structure

1. Click Link (example, http://google.com ) in some TextView, using LinkMovementMethod
2. Callback into LinkCatcher class (because some TextView exist almost all activity, so i using outer class)
3. Post event to MainActivity using Otto (because it prevent startActivity outside of activity problem.)
4. on MainActivity, intent to Activity B without any Flag, just one extra (link)
5. When Activity B created, Activity A will destroy and call onCreate(Bundle savedInstanceState) (i insert some Log.e to my Code, definitely it re-call Log code)

Tried Methods

1. Insert android:launchMode="singleInstance" in MainActivity, Activity B
2. Insert android:configChanges="orientation|screenSize|keyboardHidden" in MainActivity (it means, orientation is not problem. i already implement onSaveInstanceState in all activity of my Application) 3.remove Step 3. instead of Post event to MainActivity, call startActiivty() in LinkCatcher Class

I tried all methods which i try it. and i don't know why activity is destroy and re-call onCreate (not onResume) even i don't use any finish() methods.

Answer 1

Because that's how Android is designed- at any moment an Activity not currently on screen can be killed. You can't prevent it. What you can do is account for it- you can save off any necessary data in onSaveInstanceState, and restore it in onCreate from the Bundle or in onRestoreInstanceState.