放大 RecyclerView 中的 Item 以重叠 2 个相邻的 Android 项目 [英] Scale up Item in RecyclerView to overlaps 2 adjacent items Android

问题描述

我将 RecyclerView 与 GridLayoutManager 一起使用.我想要实现的目标是当我点击一个项目时，它会放大并重叠相邻的项目.就像下图(在Android TV中)

I'm using RecyclerView with GridLayoutManager. The goal I want to achieve is when I click on an item, It'll scale up and overlaps the adjacent items. Just like the picture below (in Android TV)

当onClick事件被触发时，我调用

When the onClick event is triggered, I call

v.animate().scaleX(1.2f).scaleY(1.2f).setDuration(500).start();

但结果如下:

它只能与位置低于自身的项目重叠.
我该怎么做才能重叠所有相邻的项目.提前致谢.
编辑
我已经试过了:

It can overlaps only items that has position lower than itself.
What should I do to overlaps all of the adjacent items. Thanks in advance.
EDIT
I already tried:

v.bringToFront();

或

(v.getParent()).bringChildToFront(v);

但它们都不起作用.

推荐答案

根据aga的回答，我使用ViewCompat.setElevation(View view, floatlevation)来支持API21 岁之前，它就像一个迷人的人.

According aga's answer, i use ViewCompat.setElevation(View view, float elevation) to support API prior to 21, It works like a charming.

static class ViewHolder extends RecyclerView.ViewHolder {

  public ViewHolder(View root) {
    // bind views
    // ...

    // bind focus listener
    root.setOnFocusChangeListener(new View.OnFocusChangeListener() {
      @Override
        public void onFocusChange(View v, boolean hasFocus) {
          if (hasFocus) {
            // run scale animation and make it bigger

            ViewCompat.setElevation(root, 1);
          } else {
            // run scale animation and make it smaller

            ViewCompat.setElevation(root, 0);
          }
        }
     });
  }
}

项目布局文件非常简单，如下所示:

The item layout file is very simple like below:

<?xml version="1.0" encoding="utf-8"?>
<TextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:background="@drawable/sl_live_item" />

这篇关于放大 RecyclerView 中的 Item 以重叠 2 个相邻的 Android 项目的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！