Google收件箱就像RecyclerView项目打开动画一样

Question

目前,我正在尝试像行为一样实施谷歌收件箱RecyclerView,我对电子邮件开放动画非常好奇.

我的问题是:怎么做？我的意思是,他们使用哪种方法？他们是否使用ItemAnimator.dispatchChangeStarting()并改变它的高度来填充父母？还是别的什么？如果他们这样做,他们如何使用拉动手势使其接近,而底层RecyclerView元素稍微可见.

任何人都可以帮助我指向一些库,或代码片段/示例？

Answer 1

您的意思是：回收器视图作为加载项目，或者一次项目并按下加载下一个屏幕。

我留下了一个如何在 recyclerview 中对项目进行收费的示例，并给出了一个动画

public class CreateAnimationView {

private static int contador;
Integer colorFrom = R.color.myAccentColor;
Integer colorTo = Color.RED;

public static AnimatorSet createAnimation(View view) {
    ObjectAnimator fadeOut = ObjectAnimator.ofFloat(view, "alpha",
            0f);
    fadeOut.setDuration(300);
    ObjectAnimator mover = ObjectAnimator.ofFloat(view,
            "translationX", -500f, 0f);
    mover.setDuration(400);
    ObjectAnimator fadeIn = ObjectAnimator.ofFloat(view, "alpha",
            0f, 1f);
    fadeIn.setDuration(300);
    AnimatorSet animatorSet = new AnimatorSet();

    animatorSet.play(mover);
    animatorSet.start();
    return animatorSet;

 }
... more animations methods.
}

在您的 RecyclerViewAdapter 中：

@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {

    GruposCardView gruposCardView = gruposCardViews.get(position);

    CreateAnimationView.createAnimationRandom(viewHolder.cardView);
   ...}

如果不在回收器视图中，您可以传递一个布局并使用此动画或从中创建一个。

 public static AnimatorSet createAnimationCollapseXY(View view) {
    ObjectAnimator scaleXOut = ObjectAnimator.ofFloat(view, "scaleX", 1f, 0f).setDuration(400);
    ObjectAnimator scaleXIn = ObjectAnimator.ofFloat(view, "scaleX", 0f, 1f).setDuration(300);
    ObjectAnimator scaleYOut = ObjectAnimator.ofFloat(view, "scaleY", 1f, 0f).setDuration(400);
    ObjectAnimator scaleYIn = ObjectAnimator.ofFloat(view, "scaleY", 0f, 1f).setDuration(300);
    ObjectAnimator rotateClockWise = ObjectAnimator.ofFloat(view, "rotation", 0f, 360f).setDuration(400);
    ObjectAnimator rotateCounterClockWise = ObjectAnimator.ofFloat(view, "rotation", 0f, -360f).setDuration(400);


    AnimatorSet animatorSet = new AnimatorSet();

    animatorSet.playTogether(scaleXIn, scaleYIn);
    //animatorSet.setStartDelay(1200);
    animatorSet.start();
    return animatorSet;
}