I have a use case where I mostly start an activity with a transition, but that\'s not the case when opening it from the navigation drawer.
To keep the transition smooth
Since you are starting an Activity
, you'll be making use of an Intent
to start it. You can add extras to Intent
s and check for them in the onCreate()
of the called Activity
.
Let's assume that we have 2 Activities – ActivityA
, and ActivityB
.
Now, let's assume that ActivityA
is the calling Activity
, and that ActivityB
is the called Activity
.
In ActivityA
, let's say you've written some code to start ActivityB
with a SharedElementTransition
.
@Override
public void onClick(View v) {
Intent startActivityBIntent = new Intent(getContext(), ActivityB.class);
startActivityBIntent.putExtra("IS_SHARED_ELEMENT_TRANSITION_ENABLED", true);
ActivityOptionsCompat activityOptionsCompat = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity(), view, ViewCompat.getTransitionName(view));
startActivity(startActivityBIntent, activityOptionsCompat);
}
Now, if you notice above, I've passed an Intent
extra with the putExtra()
method. I've passed a Boolean
value of true because I intend to start the Activity with a SharedElementTransition
.
Now in ActivityB
's onCreate()
method, you can just check for the boolean value passed to the Intent
. If you passed false, then you can add a conditional statement and perform your UI updating there. I've given you a small snippet below to help you get started:
private static final String isSharedElementTransitionEnabled = "IS_SHARED_ELEMENT_TRANSITION_ENABLED";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_b);
// If you are postponing your SharedElementTransition, don't forget to call postponeEnterTransition() and override onPreDraw()
if (!getIntent().getExtras().getBoolean(isSharedElementTransitionEnabled)) {
//Do your UI updation here
}
}
The good thing about doing it this way is that you can then have full control over how your content transitions and your shared element transitions will play out.