TaskStackBuilder transition animation

Question

I\'m using Android L transitions passing an ActivityOptions bundle in intent. How can I reproduce the animation on the same intent with TaskStackBuilder

Answer 1

After digging inside TaskStackBuilder's implementation, the problem is that it forces adding Intent.FLAG_ACTIVITY_CLEAR_TASK to the 1st intent in the stack, which makes that strange effect, so use the following to start the stack:

Intent[] intents = TaskStackBuilder.create(this)
                     .addNextIntentWithParentStack(myIntent)
                     .getIntents();
if (intents.length > 0) {
    intents[0].setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// Or any other flags you want, but not the `.._CLEAR_..` one
}
// `this` inside current activity, or you can use App's context
this.startActivities(intents, ActivityOptions.makeSceneTransitionAnimation(this).toBundle());

The idea here is to still use the TaskStackBuilder for creating your intents' stack, then remove the weird Intent.FLAG_ACTIVITY_CLEAR_TASK that the TaskStackBuilder adds to the 1st intent, then start the activities manually using any Context you want.