Example usage for android.view.animation AnimationSet setInterpolator

Introduction

In this page you can find the example usage for android.view.animation AnimationSet setInterpolator.

Prototype

public void setInterpolator(Interpolator i)

Source Link

Document

Sets the acceleration curve for this animation.

Usage

From source file:com.sociablue.nanodegree_p1.MovieListFragment.java

private void initializeFab(View rootView) {
    final RelativeLayout buttonContainer = (RelativeLayout) rootView.findViewById(R.id.menu_button_container);
    final FloatingActionButton Fab = (FloatingActionButton) rootView.findViewById(R.id.fab);
    final ImageView bottomBar = (ImageView) rootView.findViewById(R.id.menu_bottom_bar);
    final ImageView topBar = (ImageView) rootView.findViewById(R.id.menu_top_bar);
    Fab.setOnClickListener(new View.OnClickListener() {
        @TargetApi(Build.VERSION_CODES.LOLLIPOP)
        @Override/*from w  w w .java2s .  c  o m*/
        public void onClick(View v) {

            //Menu Button Icon Animation
            //Setting up necessary variables
            long animationDuration = 500;
            float containerHeight = buttonContainer.getHeight();
            float containerCenterY = containerHeight / 2;
            float containerCenterX = buttonContainer.getWidth() / 2;
            float topBarCenter = topBar.getTop() + topBar.getHeight() / 2;
            float widthOfBar = topBar.getWidth();
            float heightOfBar = topBar.getHeight();
            final float distanceBetweenBars = (containerCenterY - topBarCenter);

            /**
             *TODO: Refactor block of code to use Value Property Animator. Should be more efficient to animate multiple properties
             *and objects at the same time. Also, will try to break intialization into smaller functions.
             */

            //Setting up animations of hamburger bars and rotation

            /**
             * Animation For Top Menu Button Icon Bar. Sliding from the top to rest on top of the middle bar.
             * Y Translation is 1/2 the height of the hamburger bar minus the distance.
             * Subtracting the distance from the height because the distance between bars is
             * calculated of the exact center of the button.
             * With out the subtraction the bar would translate slightly below the middle bar.
             */
            float yTranslation = heightOfBar / 2 - distanceBetweenBars;
            float xTranslation = widthOfBar / 2 + heightOfBar / 2;
            TranslateAnimation topBarTranslationAnim = new TranslateAnimation(Animation.ABSOLUTE, 0f,
                    Animation.ABSOLUTE, 0F, Animation.ABSOLUTE, 0f, Animation.ABSOLUTE, distanceBetweenBars);
            topBarTranslationAnim.setDuration((long) (animationDuration * 0.8));
            topBarTranslationAnim.setFillAfter(true);

            //Animation for bottom hamburger bar. Translates and Rotates to create 'X'
            AnimationSet bottomBarAnimation = new AnimationSet(true);
            bottomBarAnimation.setFillAfter(true);

            //Rotate to create cross. (The cross becomes the X after the button rotation completes"
            RotateAnimation bottomBarRotationAnimation = new RotateAnimation(0f, 90f,
                    Animation.RELATIVE_TO_SELF, 1f, Animation.RELATIVE_TO_SELF, 1f);
            bottomBarRotationAnimation.setDuration(animationDuration);
            bottomBarAnimation.addAnimation(bottomBarRotationAnimation);

            //Translate to correct X alignment
            TranslateAnimation bottomBarTranslationAnimation = new TranslateAnimation(Animation.ABSOLUTE, 0f,
                    Animation.ABSOLUTE, -xTranslation, Animation.ABSOLUTE, 0f, Animation.ABSOLUTE,
                    -yTranslation);
            bottomBarTranslationAnimation.setDuration(animationDuration);
            bottomBarAnimation.addAnimation(bottomBarTranslationAnimation);

            //Button Specific Animations
            //Rotate Button Container
            RotateAnimation containerRotationAnimation = new RotateAnimation(0, 135f,
                    Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
            containerRotationAnimation.setDuration(animationDuration);
            containerRotationAnimation.setFillAfter(true);

            //Animate change of button color between Active and Disabled colors that have been
            //defined in color.xml
            int activeColor = getResources().getColor(R.color.active_button);
            int disabledColor = getResources().getColor(R.color.disabled_button);

            //Need to use ValueAnimator because property animator does not support BackgroundTint
            ValueAnimator buttonColorAnimation = ValueAnimator.ofArgb(activeColor, disabledColor);
            buttonColorAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    Fab.setBackgroundTintList(ColorStateList.valueOf((int) animation.getAnimatedValue()));
                }
            });
            buttonColorAnimation.setDuration(animationDuration);

            //Start all the animations
            topBar.startAnimation(topBarTranslationAnim);
            bottomBar.startAnimation(bottomBarAnimation);
            buttonContainer.startAnimation(containerRotationAnimation);
            buttonColorAnimation.start();

            //Toogle mMenu open and closed
            if (mMenu.isOpen()) {
                //If mMenu is open, do the reverse of the animation
                containerRotationAnimation
                        .setInterpolator(new ReverseInterpolator(new AccelerateInterpolator()));
                topBarTranslationAnim.setInterpolator(new ReverseInterpolator(new AccelerateInterpolator()));
                bottomBarAnimation.setInterpolator(new ReverseInterpolator(new AccelerateInterpolator()));
                buttonColorAnimation.setInterpolator(new ReverseInterpolator(new LinearInterpolator()));
                mMenu.close();
            } else {
                bottomBarAnimation.setInterpolator(new AccelerateInterpolator());
                mMenu.open();
            }
        }
    });
}