build Reversed Animation into a List of Animator - Android Animation

Android examples for Animation:Animation Creation

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Description

build Reversed Animation into a List of Animator

Demo Code


//package com.java2s;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static List<Animator> buildReversed(final ViewGroup view,
            int pivotX, int pivotY, float fraction, int duration, int delay) {
        List<Animator> animatorList = new ArrayList<>();

        for (int i = 0; i < view.getChildCount(); i++) {
            View childView = view.getChildAt(i);

            int deltaX = pivotX
                    - (childView.getLeft() + childView.getWidth() / 2);
            int deltaY = pivotY
                    - (childView.getTop() + childView.getHeight() / 2);

            ObjectAnimator xAnim = ObjectAnimator.ofFloat(childView,
                    "translationX", 0, fraction * deltaX);
            ObjectAnimator yAnim = ObjectAnimator.ofFloat(childView,
                    "translationY", 0, fraction * deltaY);

            xAnim.setDuration(duration);
            xAnim.setStartDelay(delay);/*from www. j a  v a  2  s . co m*/
            yAnim.setDuration(duration);
            yAnim.setStartDelay(delay);

            animatorList.add(xAnim);
            animatorList.add(yAnim);
        }

        ObjectAnimator alphaAnim = ObjectAnimator.ofFloat(view, "alpha",
                1f, 0f);
        alphaAnim.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                view.setVisibility(View.INVISIBLE);
            }
        });

        alphaAnim.setDuration(duration);
        alphaAnim.setStartDelay(delay);

        animatorList.add(alphaAnim);

        return animatorList;
    }
}

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