如何将android中的动画链接到同一个视图？

Question

我得到了一些文本浏览量，我想制作MSN的嗡嗡声效果。

我的计划是：

• 观察视图，假设向左倾斜 10 次，然后
• 将其带回起始位置，
• 然后向上倾斜 10 次，
• 然后再
• 向左向下倾斜
• ...等等。

我的观点是，我想将一些动作设置为一个视图，并且需要一个接一个地执行。

我怎样才能做到这一点？

Answer 1

您可能是指 AnimatorSet （不是 AnimationSet）。正如文档中所写：

此类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的延迟后播放。

向 AnimatorSet 添加动画有两种不同的方法：可以调用 playTogether() 或 playSequentially() 方法来添加一组动画一次，或者play(Animator)可以与Builder类中的方法结合使用来逐个添加动画。

动画将 view 移动 -100px，持续 700ms，然后在 300ms 期间消失：

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()

Answer 2

我有一个 sdk 15 兼容类的开始，可用于构建复杂的动画链希望它对某人有所帮助。您应该能够遵循设计模式来添加您自己的方法。如果您这样做，请在这里评论，我将更新答案，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);
      }


    }

Answer 3

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 );