java - Google Inbox like RecyclerView 项目打开动画

Question

目前，我正在尝试实现类似 RecyclerView 行为的 Google Inbox，而且我对电子邮件打开动画非常好奇。

我的问题是:该怎么做？我的意思是，他们使用了哪种方法？他们是否使用了 ItemAnimator.dispatchChangeStarting() 并更改了它的高度以填充父级？或者别的东西？如果他们这样做了，他们如何在底层 RecyclerView 元素稍微可见的情况下通过拉手势关闭它。

谁能帮我指出一些库或代码 fragment/示例？

Answer 1

您的意思是:recyclerview 作为一个加载项目，或者一次加载一个项目并按下加载下一个屏幕。

我留下了一个例子，说明我如何在 recyclerview 中对元素收费，并给出一个动画

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.
}

在你的 RecyclerViewAdapter 中:

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

    GruposCardView gruposCardView = gruposCardViews.get(position);

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

如果不在 recyclerview 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;
}