过渡动画TransitionManager

AutoTransition(主要用于width和height的变化时的过渡动画效果)

用法：

 private void reduce() {
        //设置收缩状态时的布局
        RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) llSearch.getLayoutParams();
        layoutParams.width = dip2px(80);
        layoutParams.setMargins(dip2px(10), dip2px(10), dip2px(10), dip2px(10));
        llSearch.setLayoutParams(layoutParams);
        //开始动画
        beginDelayedTransition(llSearch);
    }

    /**
     * 开始动画
     */
    private void beginDelayedTransition(ViewGroup view) {
        AutoTransition autoTransition = new AutoTransition();
        autoTransition.setDuration(300);
        TransitionManager.beginDelayedTransition(view, autoTransition);
    }

 private int dip2px(float dpVale) {
        final float scale = getResources().getDisplayMetrics().density;
        return (int) (dpVale * scale + 0.5f);
    }

ChangeImageTransform() (主要用于改变 ImageView 的 scaleType 属性时)

TransitionManager.beginDelayedTransition(transitionsContainer, new TransitionSet()
    .addTransition(new ChangeBounds())
    .addTransition(new ChangeImageTransform()));

ViewGroup.LayoutParams params = imageView.getLayoutParams();
params.height = expanded ? ViewGroup.LayoutParams.MATCH_PARENT : 
    ViewGroup.LayoutParams.WRAP_CONTENT;
imageView.setLayoutParams(params);

imageView.setScaleType(expanded ? ImageView.ScaleType.CENTER_CROP : 
    ImageView.ScaleType.FIT_CENTER);

自定义ProgressTransition

private class ProgressTransition extends Transition {

    /**
     * Property is like a helper that contain setter and getter in one place
     */
    private static final Property<ProgressBar, Integer> PROGRESS_PROPERTY = 
        new IntProperty<ProgressBar>() {

        @Override
        public void setValue(ProgressBar progressBar, int value) {
            progressBar.setProgress(value);
        }

        @Override
        public Integer get(ProgressBar progressBar) {
            return progressBar.getProgress();
        }
    };

    /**
      * Internal name of property. Like a intent bundles 
      */
    private static final String PROPNAME_PROGRESS = "ProgressTransition:progress";

    @Override
    public void captureStartValues(TransitionValues transitionValues) {
        captureValues(transitionValues);
    }

    @Override
    public void captureEndValues(TransitionValues transitionValues) {
        captureValues(transitionValues);
    }

    private void captureValues(TransitionValues transitionValues) {
        if (transitionValues.view instanceof ProgressBar) {
            // save current progress in the values map
            ProgressBar progressBar = ((ProgressBar) transitionValues.view);
            transitionValues.values.put(PROPNAME_PROGRESS, progressBar.getProgress());
        }
    }

    @Override
    public Animator createAnimator(ViewGroup sceneRoot, TransitionValues startValues, 
            TransitionValues endValues) {
        if (startValues != null && endValues != null && endValues.view instanceof ProgressBar) {
            ProgressBar progressBar = (ProgressBar) endValues.view;
            int start = (Integer) startValues.values.get(PROPNAME_PROGRESS);
            int end = (Integer) endValues.values.get(PROPNAME_PROGRESS);
            if (start != end) {
                // first of all we need to apply the start value, because right now
                // the view is have end value
                progressBar.setProgress(start);
                // create animator with our progressBar, property and end value
                return ObjectAnimator.ofInt(progressBar, PROGRESS_PROPERTY, end);
            }
         }
         return null;
    }

用法

private void setProgress(int value) {
    TransitionManager.beginDelayedTransition(mTransitionsContainer, new ProgressTransition());
    value = Math.max(0, Math.min(100, value));
    mProgressBar.setProgress(value);
}

参考：http://www.jianshu.com/p/98f2ec280945