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Android Animations and Transitions The Transitions Framework Transitioning Back and Forth

transition manager

Its failing to load. Steve Hunter

public class MainActivity extends Activity {

    protected TransitionManager mTransitionManager;
    protected Scene mScene1;
    protected Scene mScene2;
    protected Scene mCurrentScene;
    protected TransitionSet mForwardSet;
    protected TransitionSet mBackwardSet;

    // Some code omitted for brevity

    public void onButtonClicked(View view) {
        if (mCurrentScene == mScene2) {
            mCurrentScene = mScene1;
        else {
            mCurrentScene = mScene2;


    protected void setupTransitions() {
        // These methods are setting up scenes and transitions sets like in the video

       TransitionManager transition = new TransitionManager(); // Start here!
        mTransitionManager.setTransition(mScene1, mScene2, mForwardSet);
        mTransitionManager.setTransition(mScene2, mScene1, mBackwardSet);  

3 Answers

Hi Mal,

So in the onButtonClicked() method, you are changing mCurrentScene to be the reverse of what it currently is. That's good. But we now need to do something with that change. We want to transition to mCurrentScene.

You have set up mTransitionManager to manage this. So, call the transitionTo() method on mTransitionManagerand pass in mCurrentScene as the parameter. Do this after the if statement but inside the onButtonClicked method.



Hi Steve. It seems like my page is refusing to send result, its freezing. I sent message to admin. Will let you know when its been repaired.

Thanks for all the help.


Have you refreshed the page - it sometimes gets stuck if it's been left for a while.

thanks. That didn't help. Have to wait on Admin