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Jetpack Compose implementation of inspiration: https://twitter.com/amos_gyamfi/status/1494053914945236999
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package des.c5inco.material3 | |
import android.graphics.Matrix | |
import android.graphics.Path | |
import androidx.compose.animation.core.* | |
import androidx.compose.foundation.Canvas | |
import androidx.compose.foundation.layout.Box | |
import androidx.compose.foundation.layout.Column | |
import androidx.compose.foundation.layout.fillMaxSize | |
import androidx.compose.foundation.layout.size | |
import androidx.compose.material3.Surface | |
import androidx.compose.runtime.Composable | |
import androidx.compose.runtime.getValue | |
import androidx.compose.ui.Alignment | |
import androidx.compose.ui.Modifier | |
import androidx.compose.ui.geometry.Offset | |
import androidx.compose.ui.graphics.* | |
import androidx.compose.ui.graphics.drawscope.Stroke | |
import androidx.compose.ui.tooling.preview.Preview | |
import androidx.compose.ui.unit.dp | |
import androidx.core.graphics.* | |
import des.c5inco.material3.ui.theme.Theme.Companion.Material3Theme | |
@Preview | |
@Composable | |
fun HeartRate() { | |
Material3Theme(true, true) { | |
Surface(Modifier.fillMaxSize()) { | |
Box( | |
contentAlignment = Alignment.Center | |
) { | |
Column( | |
horizontalAlignment = Alignment.CenterHorizontally, | |
) { | |
val transition = rememberInfiniteTransition() | |
val infiniteSpec = infiniteRepeatable<Float>( | |
animation = tween(6400, easing = LinearEasing), | |
repeatMode = RepeatMode.Reverse | |
) | |
val phaseRotate by transition.animateFloat( | |
initialValue = -400f, | |
targetValue = 400f, | |
animationSpec = infiniteRepeatable( | |
animation = tween(3200, easing = LinearEasing) | |
) | |
) | |
val blueDegrees by transition.animateFloat( | |
initialValue = -180f, | |
targetValue = 180f, | |
animationSpec = infiniteSpec | |
) | |
val redDegrees by transition.animateFloat( | |
initialValue = -60f, | |
targetValue = 360f, | |
animationSpec = infiniteSpec | |
) | |
HeartIcon( | |
modifier = Modifier.size(48.dp, 44.dp), | |
phase = phaseRotate, | |
colors = listOf(Color.Blue.hueRotate(blueDegrees), Color.Red.hueRotate(redDegrees)), | |
dashArray = floatArrayOf(340f, 60f) | |
) | |
} | |
} | |
} | |
} | |
} | |
@Composable | |
private fun HeartIcon( | |
modifier: Modifier, | |
phase: Float, | |
colors: List<Color>, | |
dashArray: FloatArray | |
) { | |
Canvas(modifier) { | |
val baseWidth = 20.0077f | |
val baseHeight = 17.6469f | |
val path = Path() | |
path.moveTo(17.6641f, 0.9907f) | |
path.cubicTo(15.0241f, -0.8093f, 11.7641f, 0.0307f, 10.0041f, 2.0907f) | |
path.cubicTo(8.2441f, 0.0307f, 4.9841f, -0.8193f, 2.3441f, 0.9907f) | |
path.cubicTo(0.9441f, 1.9507f, 0.0641f, 3.5707f, 0.0041f, 5.2807f) | |
path.cubicTo(-0.1359f, 9.1607f, 3.3041f, 12.2707f, 8.5541f, 17.0407f) | |
path.lineTo(8.6541f, 17.1307f) | |
path.cubicTo(9.4141f, 17.8207f, 10.5841f, 17.8207f, 11.3441f, 17.1207f) | |
path.lineTo(11.4541f, 17.0207f) | |
path.cubicTo(16.7041f, 12.2607f, 20.1341f, 9.1507f, 20.0041f, 5.2707f) | |
path.cubicTo(19.9441f, 3.5707f, 19.0641f, 1.9507f, 17.6641f, 0.9907f) | |
path.lineTo(17.6641f, 0.9907f) | |
path.close() | |
drawPath( | |
path = path | |
.apply { | |
transform(Matrix().apply { | |
setScale(size.width / baseWidth, size.height / baseHeight) | |
}) | |
} | |
.asComposePath(), | |
brush = Brush.linearGradient( | |
colors = colors, | |
start = Offset(x = 0f, y = size.height / 2), | |
end = Offset(x = size.width, y = size.height / 2) | |
), | |
style = Stroke( | |
width = 16f, | |
cap = StrokeCap.Round, | |
join = StrokeJoin.Round, | |
pathEffect = PathEffect.dashPathEffect(dashArray, phase) | |
)) | |
} | |
} | |
fun Color.hueRotate(degrees: Float): Color { | |
val (_, r, g, b) = toArgb() | |
val out = FloatArray(3) | |
ColorUtils.RGBToHSL(r, g, b, out) | |
out[0] = (out[0] + degrees) % 360.0f | |
return Color(ColorUtils.HSLToColor(out)) | |
} |
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