Created
December 11, 2023 13:12
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Oscillating Heart Animation using jetpack compose
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| import androidx.compose.animation.core.Animatable | |
| import androidx.compose.animation.core.InfiniteRepeatableSpec | |
| import androidx.compose.animation.core.RepeatMode | |
| import androidx.compose.animation.core.tween | |
| import androidx.compose.foundation.background | |
| import androidx.compose.foundation.layout.Arrangement | |
| import androidx.compose.foundation.layout.Box | |
| import androidx.compose.foundation.layout.Column | |
| import androidx.compose.foundation.layout.fillMaxSize | |
| import androidx.compose.foundation.layout.padding | |
| import androidx.compose.foundation.layout.size | |
| import androidx.compose.material.icons.Icons | |
| import androidx.compose.material.icons.filled.Favorite | |
| import androidx.compose.material3.Icon | |
| import androidx.compose.runtime.Composable | |
| import androidx.compose.runtime.LaunchedEffect | |
| import androidx.compose.runtime.remember | |
| import androidx.compose.ui.Alignment | |
| import androidx.compose.ui.Modifier | |
| import androidx.compose.ui.draw.drawBehind | |
| import androidx.compose.ui.geometry.Offset | |
| import androidx.compose.ui.graphics.Color | |
| import androidx.compose.ui.graphics.graphicsLayer | |
| import androidx.compose.ui.graphics.lerp | |
| import androidx.compose.ui.tooling.preview.Preview | |
| import androidx.compose.ui.unit.dp | |
| import com.techullurgy.composeuisapplication.math.map | |
| import kotlinx.coroutines.launch | |
| @Preview | |
| @Composable | |
| private fun OscillatingHeartAnimation() { | |
| Column( | |
| modifier = Modifier | |
| .fillMaxSize() | |
| .background(Color(200, 100, 0)), | |
| verticalArrangement = Arrangement.Bottom, | |
| horizontalAlignment = Alignment.CenterHorizontally | |
| ) { | |
| val translationValue = remember { Animatable(0f) } | |
| LaunchedEffect(key1 = Unit) { | |
| launch { | |
| translationValue.animateTo( | |
| targetValue = -100f, | |
| animationSpec = InfiniteRepeatableSpec( | |
| animation = tween(800), | |
| repeatMode = RepeatMode.Reverse | |
| ) | |
| ) | |
| } | |
| } | |
| Box( | |
| modifier = Modifier | |
| .padding(bottom = 60.dp) | |
| .drawBehind { | |
| val startX = map(translationValue.value, -100f, 0f, 0f, .5f) | |
| val startOffset = Offset(center.x - (size.width * startX), size.height) | |
| val endOffset = Offset(center.x + (size.width * startX), size.height) | |
| drawLine(color = Color.White, strokeWidth = 3.dp.toPx(), start = startOffset, end = endOffset) | |
| }, | |
| contentAlignment = Alignment.Center | |
| ) { | |
| val animationProgress = map(translationValue.value, -100f, 0f, 0f, 1f) | |
| val animatedColor = lerp(Color.White, Color.Black, animationProgress) | |
| Icon( | |
| imageVector = Icons.Default.Favorite, | |
| contentDescription = null, | |
| tint = animatedColor, | |
| modifier = Modifier | |
| .size(100.dp) | |
| .graphicsLayer { | |
| val scaleFactor = map(translationValue.value, -100f, 0f, 3f, 1f) | |
| scaleX = scaleFactor | |
| scaleY = scaleFactor | |
| translationY = translationValue.value * 8 | |
| } | |
| ) | |
| } | |
| } | |
| } |
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OscillatingHeartAnimation.mp4