I was following these four topics Creating a Fragment, Handling the Fragment Lifecycle , Managing the Activity Lifecycle and Pausing and Resuming an Activity. So I am in a little doubt about this. My question is
Activity
call B Activity
through Intent
but A does not call finish()
method then A will be in Pause
state if B is Transparent
or SemiTransparent
and in Stop
state if B is Opaque
. Am I right?Activity
contains Fragment
F then if A will go to Pause
state then F will go to Pause
state and if A will be in Stop
state then F will be in Stop
state too. Am I right?Activity
and B is Transparent
then A will be in Pause
state and F will too. If B call finish()
then A will come to Resume
state but what will happen to F? will it come to resume from pause? If it is then how and what steps because I have not seen any direct link in Fragment
life cycle which indicates onPause()
to onResume()
directly as Activity can do.
Hope I am able to ask what I want. Sorry for my bad Englsh.
You can't be sure that only onPause will be called on A if B is SemiTransparent or partially visible as I understand it:
Paused
Another activity is in the foreground and has focus, but this one is still visible. That is, another activity is visible on top of this one and that activity is partially transparent or doesn't cover the entire screen. A paused activity is completely alive (the Activity object is retained in memory, it maintains all state and member information, and remains attached to the window manager), but can be killed by the system in extremely low memory situations.
Yes, you are right:
The lifecycle of the activity in which the fragment lives directly affects the lifecycle of the fragment, such that each lifecycle callback for the activity results in a similar callback for each fragment. For example, when the activity receives onPause(), each fragment in the activity receives onPause().
However, the opposite is not true, meaning that if a fragment receives onStop, that does not guarantee that the Activity's onStop will be called.
I am not quite sure what you mean by your last sentence or how you have tested this. According to the Fragment documentation:
public void onResume ()
Called when the fragment is visible to the user and actively running. This is generally tied to Activity.onResume of the containing Activity's lifecycle
It says generally because it depends on how the fragment is handled by the activity.
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