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Android Animations and Transitions The Transitions Framework Create a Transition

Posted by jcorum
jcorum
71,830 Points

Create a Transition

The challenge editor says there are syntax errors, but I can't see any. Would appreciate another pair of eyes!

P.S., contrary to the error message, there is no Preview button for this challenge.

CodeChallenge.java 
// Add your code below!
ViewGroup root = (ViewGroup) findViewById(R.id.container);

//Task 1 -- passes
Scene expandedScene = Scene.getSceneForLayout(root, R.layout.transition_scene_2, this.getContext());


//Task 2 -- fails
TransitionSet transitionSet = new TransitionSet();

ChangeBounds changeBounds = new ChangeBounds();
transitionSet.addTransition(changeBounds);

TransitionManager.go(expandedScene, transitionSet);
// gets error: Bummer! There is a compiler error.  Please click on preview to view your syntax errors!
Simon Coates
Simon Coates
28,694 Points
Simon Coates
Simon Coates
28,694 Points

fyi, i sent support a screenshot of the message and imaginary button. I've seen the messages about non-existent preview buttons a few times before, so i'd assume they already know.

2 Answers

Seth Kroger
Seth Kroger
56,413 Points
Seth Kroger
Seth Kroger
56,413 Points

I think the issue is TransitionSet isn't imported because it isn't needed with only one transition. The challenge does accept the following:

// Add your code below!
ViewGroup root = (ViewGroup) findViewById(R.id.container);

//Task 1 -- passes
Scene expandedScene = Scene.getSceneForLayout(root, R.layout.transition_scene_2, this.getContext());

//Task 2 -- passes
TransitionManager.go(expandedScene, new ChangeBounds());
jcorum
jcorum
71,830 Points

Seth, thanks.

Simon Coates
Simon Coates
28,694 Points
Simon Coates
Simon Coates
28,694 Points

it accepts:

// Add your code below!
ViewGroup root = (ViewGroup) findViewById(R.id.container);

//Task 1 -- passes
Scene expandedScene = Scene.getSceneForLayout(root, R.layout.transition_scene_2, this.getContext());


//Task 2 -- fails
TransitionManager tm= new TransitionManager();
tm.go(expandedScene, new Transition());

I don't know android, so i don't have a clue why it accepts this, but it gave you a syntax problem on the line

TransitionSet transitionSet = new TransitionSet();

so it was basically rejecting your approach from the get-go. So it's probably something dumb like the challenge not having the necessary imports.