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?

This is my current working method with a single Intent:

startActivity(myIntent, ActivityOptions.makeSceneTransitionAnimation(this).toBundle()); 

This is my try with TaskStackBuilder:

 TaskStackBuilder builder = TaskStackBuilder.create(this);  builder.addNextIntentWithParentStack(myIntent);  builder.startActivities(ActivityOptions.makeSceneTransitionAnimation(this).toBundle()); 

But the animation creates a strange effect, not the same one of the "single-intent" version.

I also tried with:

builder.addNextIntent(myIntent); 

instead of:

builder.addNextIntentWithParentStack(myIntent); 

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.