Android开发之Compose基础学习-Compose中Animation动画的基本用法

先上图

 

再看代码

package com.xiayiye5.composefirst.components

import androidx.compose.animation.AnimatedVisibility
import androidx.compose.animation.ExperimentalAnimationApi
import androidx.compose.animation.fadeIn
import androidx.compose.animation.fadeOut
import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.Column
import androidx.compose.material.*
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Delete
import androidx.compose.material.icons.filled.Menu
import androidx.compose.runtime.*
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.res.colorResource
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.tooling.preview.Preview
import com.xiayiye5.composefirst.R

/*
 * Copyright (c) 2022, [email protected] All Rights Reserved.
 * #                                                   #
 * #                       _oo0oo_                     #
 * #                      o8888888o                    #
 * #                      88" . "88                    #
 * #                      (| -_- |)                    #
 * #                      0\  =  /0                    #
 * #                    ___/`---'\___                  #
 * #                  .' \\|     |# '.                 #
 * #                 / \\|||  :  |||# \                #
 * #                / _||||| -:- |||||- \              #
 * #               |   | \\\  -  #/ |   |              #
 * #               | \_|  ''\---/''  |_/ |             #
 * #               \  .-\__  '-'  ___/-. /             #
 * #             ___'. .'  /--.--\  `. .'___           #
 * #          ."" '<  `.___\_<|>_/___.' >' "".         #
 * #         | | :  `- \`.;`\ _ /`;.`/ - ` : | |       #
 * #         \  \ `_.   \_ __\ /__ _/   .-` /  /       #
 * #     =====`-.____`.___ \_____/___.-`___.-'=====    #
 * #                       `=---='                     #
 * #     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~   #
 * #                                                   #
 * #               佛祖保佑         永无BUG              #
 * #                                                   #
 */

/**
 * @author 下一页5（轻飞扬）
 * 创建时间：2022/5/18 10:28
 * 个人小站：http://yhsh.wap.ai(已挂)
 * 最新小站：http://www.iyhsh.icoc.in
 * 联系作者：企鹅 13343401268
 * 博客地址：http://blog.csdn.net/xiayiye5
 * 项目名称：ComposeFirst
 * 文件包名：com.xiayiye5.composefirst.components
 * 文件说明：Compose中Animation动画的基本用法
 */

@OptIn(ExperimentalAnimationApi::class)
@Composable
fun AnimationSamples() {
    var show by remember {
        mutableStateOf(false)
    }
    Scaffold(topBar = {
        TopAppBar(
            navigationIcon = { Icon(imageVector = Icons.Default.Menu, contentDescription = null) },
            title = { Text(text = "动画的基本用法") },
            actions = {
                Icon(
                    imageVector = Icons.Default.Delete,
                    contentDescription = null,
                    tint = Color.White
                )
                Text(text = "删除", color = Color.White)
            })
    }, backgroundColor = colorResource(id = R.color.purple_200)) {
        Column() {
            Button(onClick = { show = !show }) {
                Text(text = "点击切换显示隐藏动画")
            }
            AnimatedVisibility(visible = show, enter = fadeIn(), exit = fadeOut()) {
                Image(
                    painter = painterResource(id = R.drawable.image_bitmap),
                    contentDescription = null
                )
            }
        }
    }
}

@Preview
@Composable
fun AnimationSamplesPreview() {
    AnimationSamples()
}