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反转动画

animation android

pbreault · 技术社区 · 14 年前

我有一个图像视图,当它被添加到布局中时,它会被设置为动画。当它被移除时,我想反转相同的动画。

在Android中,有没有一种方法可以在不重新编码和反转参数的情况下反转动画?

8 回复 | 直到 6 年前

pcans 14 年前

package com.example.android;

import android.view.animation.Interpolator;

public class ReverseInterpolator implements Interpolator {
    @Override
    public float getInterpolation(float paramFloat) {
        return Math.abs(paramFloat -1f);
    }
}

myAnimation.setInterpolator(new ReverseInterpolator());

Blo 8 年前

ValueAnimator myAnimator = new ValueAnimator();  
myAnimator.reverse()

here

Community CDub 8 年前

pcans

class ReverseInterpolator implements Interpolator{
    private final Interpolator delegate;

    public ReverseInterpolator(Interpolator delegate){
        this.delegate = delegate;
    }

    public ReverseInterpolator(){
        this(new LinearInterpolator());
    }

    @Override
    public float getInterpolation(float input) {
        return 1 - delegate.getInterpolation(input);
    }
}

ReverseInterpolator reverseInterpolator = new ReverseInterpolator(new AccelerateInterpolator())
myAnimation.setInterpolator(reverseInterpolator);

Dori 10 年前

Interpolator Animation.REVERSE here

public class ReverseInterpolator implements Interpolator {

    private final Interpolator mInterpolator;

    public ReverseInterpolator(Interpolator interpolator){
        mInterpolator = interpolator;
    }

    @Override
    public float getInterpolation(float input) {
        return mInterpolator.getInterpolation(reverseInput(input));
    }

    /**
     * Map value so 0-0.5 = 0-1 and 0.5-1 = 1-0
     */
    private float reverseInput(float input){        
        if(input <= 0.5)
            return input*2;
        else
            return Math.abs(input-1)*2;        
    }
}

draw 12 年前

Khurram Shehzad 7 年前

Animation.AnimationListener onAnimationEnd

Goodlife 6 年前

 ObjectAnimator anim = ObjectAnimator.ofFloat(imageViewUpb, "rotation", rotationAngle, rotationAngle + 180);

            if (linearLayoutb.getVisibility()==GONE){

                linearLayoutb.setVisibility(VISIBLE);
                anim.setDuration(500);
                anim.start();
                rotationAngle += 180;
                rotationAngle = rotationAngle%360;
        imageViewUpb.animate().rotation(rotationAngle).setDuration(500).start();

            }else{

                linearLayoutb.setVisibility(GONE);
                anim.setDuration(500);
                anim.start();
                rotationAngle += 180;
                rotationAngle = rotationAngle%180;
imageViewUpDownb.animate().rotation(rotationAngle).setDuration(500).start();

            }

int rotationAngle = 0; global parameter

larisoft 6 年前

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/linear_interpolator">
    <alpha
        android:duration="2000"
        android:fromAlpha="0.1"
        android:repeatCount="infinite"
        android:repeatMode="reverse"
        android:toAlpha="1.0">
    </alpha>
</set>