Thursday, April 15, 2021

jetpack compose - Infinite color animation

MainActivity.kt

package com.cfsuman.jetpackcompose

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.activity.compose.setContent
import androidx.compose.animation.animateColor
import androidx.compose.animation.core.*
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Favorite
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            MainContent()
        }
    }


    @Composable
    fun MainContent(){
        val infiniteTransition = rememberInfiniteTransition()

        val color by infiniteTransition.animateColor(
            initialValue = Color(0xFFED2939),
            targetValue = Color(0xFF5B3256),
            animationSpec = infiniteRepeatable(
                animation = tween(
                    durationMillis = 3000,
                    easing = FastOutSlowInEasing
                ),
                repeatMode = RepeatMode.Reverse
            )
        )

        Column(
            modifier = Modifier
                .fillMaxSize()
                .background(Color(0xFFF8B878))
                .padding(16.dp),
            verticalArrangement = Arrangement.Center,
            horizontalAlignment = Alignment.CenterHorizontally
        ) {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = "Localized description",
                Modifier
                    .size(300.dp),
                tint = Color(color.value)
            )
        }
    }


    @Preview
    @Composable
    fun ComposablePreview(){
        //MainContent()
    }
}