[英]How to chain animation in android to the same view?
我得到了一些文本视图,我想制作 MSN 的嗡嗡声效果。
我的计划是:
我的观点是,我想将一些动作序列设置为一个视图,并且需要一个接一个地执行。
我怎样才能做到这一点?
您可能是指AnimatorSet (不是AnimationSet )。 如文档中所述:
这个 class 按指定顺序播放一组
Animator
对象。 动画可以设置为一起播放、按顺序播放或在指定延迟后播放。向 AnimatorSet 添加动画有两种不同的方法:可以
playTogether()
或playSequentially()
方法来一次添加一组动画,或者play(Animator)
可以与Builder
class 一个一个添加动画。
-100px
将view
移动 -100 像素700ms
,然后在300ms
内消失:
final View view = findViewById(R.id.my_view);
final Animator translationAnimator = ObjectAnimator
.ofFloat(view, View.TRANSLATION_Y, 0f, -100f)
.setDuration(700);
final Animator alphaAnimator = ObjectAnimator
.ofFloat(view, View.ALPHA, 1f, 0f)
.setDuration(300);
final AnimatorSet animatorSet = new AnimatorSet();
animatorSet.playSequentially(
translationAnimator,
alphaAnimator
);
animatorSet.start()
我有一个 sdk 15 兼容 class 的开始,可用于构建复杂的 animation 链希望它对某人有所帮助。 您应该能够按照设计模式添加自己的方法。 如果你这样做,请在这里评论他们,我会更新答案,干杯!
package com.stuartclark45.magicmatt.util;
import java.util.LinkedList;
import java.util.List;
import android.animation.Animator;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.view.View;
/**
* Used to build complex animations for a view. Example usage bellow makes view move out to the
* right whilst rotating 45 degrees, then move out to the left.
*
* {@code
* int rotateDuration = 200;
* int rotation = 45;
* new AnimationBuilder(view)
* .translationX(100, rotateDuration)
* .rotateTo(rotation, rotateDuration)
* .then()
* .translationX(-200, rotateDuration)
* .start();
* }
*
* @author Stuart Clark
*/
public class AnimationBuilder {
private View view;
private List<Animator> setsList;
private List<Animator> buildingList;
public AnimationBuilder(View view) {
this.view = view;
this.setsList = new LinkedList<>();
this.buildingList = new LinkedList<>();
}
public AnimationBuilder rotateTo(float deg, long duration) {
buildingList.add(ObjectAnimator.ofFloat(view, "rotation", deg).setDuration(duration));
return this;
}
public AnimationBuilder translationX(int deltaX, long duration) {
buildingList.add(ObjectAnimator.ofFloat(view, "translationX", deltaX).setDuration(duration));
return this;
}
public AnimationBuilder translationY(int deltaX, long duration) {
buildingList.add(ObjectAnimator.ofFloat(view, "translationY", deltaX).setDuration(duration));
return this;
}
public AnimationBuilder then() {
createAniSet();
// Reset the building list
buildingList = new LinkedList<>();
return this;
}
public void start() {
createAniSet();
AnimatorSet metaSet = new AnimatorSet();
metaSet.playSequentially(setsList);
metaSet.start();
}
private void createAniSet() {
AnimatorSet aniSet = new AnimatorSet();
aniSet.playTogether(buildingList);
setsList.add(aniSet);
}
}
使用AnimationSet :
AnimationSet set = new AnimationSet(true);
Animation animation = new AlphaAnimation(0.0f, 1.0f);
animation.setDuration(100);
set.addAnimation(animation);
animation = new TranslateAnimation(
Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f,
Animation.RELATIVE_TO_SELF, -1.0f, Animation.RELATIVE_TO_SELF, 0.0f
);
animation.setDuration(500);
set.addAnimation(animation);
view.startAnimation( set );
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