有没有办法同时为多个视图制作动画?
我想要做的是翻译动画:
我有5个TextView和4个彩色条带(带有背景的普通RelativeLayouts)。在动画开始时,stips与TextViews在水平行中堆叠。最后,我想要在条带之间堆叠所有TextView:
这是一张非常简单的图画,但它展示了我想要做的事情。有没有办法用动画做这个,或者我必须使用画布动画。
答案 0 :(得分:52)
您可以使用ObjectAnimator为多视图设置动画,如下所示:
ArrayList<ObjectAnimator> arrayListObjectAnimators = new ArrayList<ObjectAnimator>(); //ArrayList of ObjectAnimators
ObjectAnimator animY = ObjectAnimator.ofFloat(view, "y", 100f);
arrayListObjectAnimators.add(animY);
ObjectAnimator animX = ObjectAnimator.ofFloat(view, "x", 0f);
arrayListObjectAnimators.add(animX);
...
ObjectAnimator[] objectAnimators = arrayListObjectAnimators.toArray(new ObjectAnimator[arrayListObjectAnimators.size()]);
AnimatorSet animSetXY = new AnimatorSet();
animSetXY.playTogether(objectAnimators);
animSetXY.setDuration(1000);//1sec
animSetXY.start();
答案 1 :(得分:4)
创建动画对象,然后在所有视图上同时使用startAnimation
。所以它会是这样的:
TranslateAnimation anim1;
TranslateAnimation anim2;
TranslateAnimation anim3;
// Setup the animation objects
public void startAnimations()
{
//... collect view objects
view1.startAnimation(anim1);
view2.startAnimation(anim2);
view3.startAnimation(anim3);
}
请注意,您一次拍摄的动画越多,它就越慢。
答案 2 :(得分:3)
我设法在多个视图中共享一个动画实例。至少使用AlphaAnimation。我有一个ListView和一个应该应用于所有列表项视图的特定子项的动画。在我的情况下,视图应该可以随时“加入”和“离开”共享动画,它不应以任何方式影响其他动画视图或干扰已经运行的动画。 为了达到这个目的,我不得不对android的股票AlphaAnimation进行调整。 我的用例相当特殊,但是为了防止有人不得不用ListView来处理类似的目标,请将它放在这里。
/**
* This class is a copy of android's stock AlphaAnimation with two adjustments:
* - fromAlpha, toAlpha and duration are settable at any time.
* - reset() method can be blocked. Reason: view.setAnimation() calls animation's reset() method
* which is not intended in our use case.
* For every new list item view we call setAnimation once for it's life time
* and animation should not be reset because it is shared by all list item views and may be in progress.
*/
public class MutableAlphaAnimation extends Animation {
private float mFromAlpha;
private float mToAlpha;
private boolean resetBlocked;
public MutableAlphaAnimation() {
}
public void start(float fromAlpha, float toAlpha, long duration) {
mFromAlpha = fromAlpha;
mToAlpha = toAlpha;
setDuration(duration);
setStartTime(START_ON_FIRST_FRAME);
}
public void setResetBlocked(boolean resetBlocked) {
this.resetBlocked = resetBlocked;
}
@Override
public void reset() {
if (! resetBlocked) super.reset();
}
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
final float alpha = mFromAlpha;
t.setAlpha(alpha + ((mToAlpha - alpha) * interpolatedTime));
}
@Override
public boolean willChangeTransformationMatrix() {
return false;
}
@Override
public boolean willChangeBounds() {
return false;
}
}
将此动画设置为视图:
animation.setResetBlocked(true);
view.setAnimation(animation);
animation.setResetBlocked(false);
要开始动画(之前由setAnimation设置),必须完成两件事:
animation.start(0.0f, 1.0f, FADE_IN_DURATION);
之后,您必须在受动画影响的每个视图上手动调用invalidate()。
通常的startAnimation()会为你做invalidate(),但setAnimation没有。 (阅读android的源代码中关于View.setAnimation()方法的评论)。
答案 3 :(得分:3)
您可以使用AnimationSet
AnimatorSet decSet2 = new AnimatorSet();
decSet2.playTogether(
ObjectAnimator.ofFloat(view, "x",dX),
ObjectAnimator.ofFloat(view, "y",dY),
ObjectAnimator.ofFloat(mTextCancel, "x",dX),
ObjectAnimator.ofFloat(mTextCancel, "y", dY),
ObjectAnimator.ofArgb(mBtnOne, "visibility", View.VISIBLE, View.GONE),
);
decSet2.setDuration(0);
decSet2.start();