Question

android两个animation无限循环怎么做

Answer 1

据我所知，想直接给AnimationSet设置重复，是不行的。不过你可以这样来：

final int transDuration = 2000;
final int alphaDuration = 1000;

AnimationSet set = new AnimationSet(false);
set.setRepeatMode(Animation.RESTART);

TranslateAnimation translateAnimation = new TranslateAnimation(0, 0, 0, 300);
translateAnimation.setInterpolator(new Interpolator() {
@Override
public float getInterpolation(float arg0) {
float ret = arg0 / (1.0f * transDuration / (transDuration + alphaDuration));
return ret < 1 ? ret : 1;
}
});
translateAnimation.setRepeatCount(Animation.INFINITE);
translateAnimation.setDuration(transDuration + alphaDuration);

AlphaAnimation alphaAnimation = new AlphaAnimation(1, 0);
alphaAnimation.setRepeatCount(Animation.INFINITE);
alphaAnimation.setDuration(alphaDuration);
alphaAnimation.setStartOffset(transDuration);

set.addAnimation(translateAnimation);
set.addAnimation(alphaAnimation);
view.startAnimation(set);

或者像其他所说的，通过在一个动画结束后开始另外一个动画的方式。

Answer 2

方法一：
①参考：http://blog.csdn.net/jiangwei0910410003/article/details/16985999
②anim中主要参数设置：
android:interpolator="@android:anim/linear_interpolator" android:repeatMode="restart" android:repeatCount="infinite"

方法二：
①Animation设置setAnimationListener(new ReStartAnimationListener())
②ReStartAnimationListener()具体实现
/** * 重复启动动画 */ private class ReStartAnimationListener implements Animation.AnimationListener { public void onAnimationEnd(Animation animation) { // TODO Auto-generated method stub animation.reset(); animation.setAnimationListener(new ReStartAnimationListener()); animation.start(); } public void onAnimationRepeat(Animation animation) { // TODO Auto-generated method stub } public void onAnimationStart(Animation animation) { // TODO Auto-generated method stub } }