Created
February 27, 2022 04:45
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Flying Hearts Animation in jetpack Compose
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@OptIn(ExperimentalAnimationApi::class) | |
@Composable | |
fun Heart(modifier: Modifier, horizontalPadding: Int, bottomMargin: Int) { | |
val width = LocalConfiguration.current.screenWidthDp | |
val height = LocalConfiguration.current.screenHeightDp - bottomMargin | |
val yRandom = Random.nextInt(0, height / 2) | |
val xRandom = Random.nextInt(horizontalPadding, (width - horizontalPadding)) | |
val state = remember { | |
mutableStateOf(HeartState.Show) | |
} | |
val offsetYAnimation: Dp by animateDpAsState( | |
targetValue = when (state.value) { | |
HeartState.Show -> height.dp | |
else -> yRandom.dp | |
}, | |
animationSpec = tween(1000) | |
) | |
val offsetXAnimation: Dp by animateDpAsState( | |
targetValue = when (state.value) { | |
HeartState.Show -> (((width - (horizontalPadding * 2)) / 2) + 8).dp | |
else -> xRandom.dp | |
}, | |
animationSpec = tween(1000) | |
) | |
LaunchedEffect(key1 = state, block = { | |
state.value = when (state.value) { | |
HeartState.Show -> HeartState.Hide | |
HeartState.Hide -> HeartState.Show | |
} | |
}) | |
AnimatedVisibility( | |
visible = state.value == HeartState.Show, | |
enter = fadeIn(animationSpec = tween(durationMillis = 250)), | |
exit = fadeOut(animationSpec = tween(durationMillis = 700)) | |
) { | |
Canvas(modifier = modifier | |
.offset(y = offsetYAnimation, x = offsetXAnimation), | |
onDraw = { | |
val path = Path().apply { | |
heartPath(Size(120f, 120f)) | |
} | |
drawPath( | |
path = path, | |
color = Color.Red, | |
) | |
} | |
) | |
} | |
} |
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@Composable | |
fun Screen() { | |
val heartCount = remember { mutableStateOf(0) } | |
Box(modifier = Modifier.fillMaxSize()) { | |
repeat(heartCount.value) { | |
Heart( | |
modifier = Modifier | |
.fillMaxSize() | |
.align(Alignment.BottomCenter) | |
.padding(bottom = 36.dp), | |
horizontalPadding = 24, | |
bottomMargin = 110 | |
) | |
} | |
Button( | |
onClick = { | |
heartCount.value++ | |
}, | |
modifier = Modifier | |
.align(Alignment.BottomCenter) | |
.padding(24.dp) | |
.wrapContentHeight() | |
.wrapContentWidth() | |
) { | |
Text( | |
text = "Like", | |
color = Color.White | |
) | |
} | |
} | |
} |
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