让动画不再僵硬：Facebook Rebound Android动画库介绍

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Spring spring = mSpringSystem
.createSpring()
.setSpringConfig(SpringConfig.fromOrigamiTensionAndFriction(86, 7))
.addListener(new SimpleSpringListener() {
@Override
public void onSpringUpdate(Spring spring) {
float value = (float) spring.getCurrentValue();
ViewHelper.setTranslationX(view, value);
}
});

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Spring spring = mSpringSystem
.createSpring()
.setSpringConfig(SpringConfig.fromOrigamiTensionAndFriction(86, 7))
.addListener(new SimpleSpringListener() {
@Override
public void onSpringUpdate(Spring spring) {
float value = (float) spring.getCurrentValue();
float scale = 1f - value;
ViewHelper.setScaleX(mItemIconViewList.get(index), scale);
ViewHelper.setScaleY(mItemIconViewList.get(index), scale);
}
});

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for (int i = 0; i < viewCount; i++) {
final View view = new View(context);
view.setLayoutParams(
new TableLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT,
1f));
mSpringChain.addSpring(new SimpleSpringListener() {
@Override
public void onSpringUpdate(Spring spring) {
float value = (float) spring.getCurrentValue();
view.setTranslationX(value);
}
});
int color = (Integer) evaluator.evaluate((float) i / (float) viewCount, startColor, endColor);
view.setBackgroundColor(color);
view.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return handleRowTouch(v, event);
}
});
mViews.add(view);
rootView.addView(view);
}

getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
getViewTreeObserver().removeOnGlobalLayoutListener(this);
List<Spring> springs = mSpringChain.getAllSprings();
for (int i = 0; i < springs.size(); i++) {
springs.get(i).setCurrentValue(-mViews.get(i).getWidth());
}
postDelayed(new Runnable() {
@Override
public void run() {
mSpringChain
.setControlSpringIndex(0)
.getControlSpring()
.setEndValue(0);
}
}, 500);
}
});