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Compose自定義View實(shí)現(xiàn)宇智波斑寫輪眼

 更新時(shí)間：2023年02月12日 11:32:03   作者：cxy107750  
這篇文章主要為大家介紹了Compose自定義View實(shí)現(xiàn)宇智波斑寫輪眼示例詳解，有需要的朋友可以借鑒參考下，希望能夠有所幫助，祝大家多多進(jìn)步，早日升職加薪

正文

本章節(jié)是Compose自定義繪制的第二章，畫的是一個(gè)之前設(shè)計(jì)給的一個(gè)比較復(fù)雜的，設(shè)計(jì)所謂的會(huì)呼吸的動(dòng)畫，那時(shí)候?qū)崿F(xiàn)花了蠻長的時(shí)間，搬著電腦跟設(shè)計(jì)一幀一幀地對，沒多久后來需求就被拿掉了，至于文章的標(biāo)題哈哈隨意起了一個(gè)，長得有點(diǎn)像而已。

Compose的實(shí)現(xiàn)，圖形本身跟上一章節(jié)的LocationMarker其實(shí)差不太多，倒過來了而已，調(diào)整了P1跟P3, 基本圖形的Path，這里不再做介紹，讀者也可以去看代碼實(shí)現(xiàn)。主要介紹一下動(dòng)畫吧。

首先看一下gif動(dòng)圖：

整個(gè)圖形分三層，最底層是灰色的背景，沒有動(dòng)畫實(shí)現(xiàn)。

先實(shí)現(xiàn)功能效果

第二層是一個(gè)層變的動(dòng)畫，每層有個(gè)delay的不同延遲，對alpha最一個(gè)ObjectAnimator.ofFloat(water1, "alpha", 0f, 0.5f, 0.2f, 1f)漸變的動(dòng)畫，0.5f 到0.2f, 再到1f這個(gè)地方展現(xiàn)出所謂的呼吸的感覺。Compose目前寫的不多，有些冗余代碼沒有抽象，先實(shí)現(xiàn)了功能效果。

@Composable
fun drawWaterDrop(){
  val waterDropModel by remember {
  mutableStateOf(WaterDropModel.waterDropM)
  }
  val color1 = colorResource(id = waterDropModel.water1.colorResource)
  val color2 = colorResource(id = waterDropModel.water2.colorResource)
  val color3 = colorResource(id = waterDropModel.water3.colorResource)
  val color4 = colorResource(id = waterDropModel.water4.colorResource)
  val color5 = colorResource(id = waterDropModel.water5.colorResource)
  val color6 = colorResource(id = waterDropModel.water6.colorResource)
  val color7 = colorResource(id = waterDropModel.water7.colorResource)
  val color8 = colorResource(id = waterDropModel.water8.colorResource)
  val animAlpha1 = remember { Animatable(0f, Float.VectorConverter) }
  val animAlpha2 = remember { Animatable(0f, Float.VectorConverter) }
  val animAlpha3 = remember { Animatable(0f, Float.VectorConverter) }
  val animAlpha4 = remember { Animatable(0f, Float.VectorConverter) }
  val animAlpha5 = remember { Animatable(0f, Float.VectorConverter) }
  val animAlpha6 = remember { Animatable(0f, Float.VectorConverter) }
  val animAlpha7 = remember { Animatable(0f, Float.VectorConverter) }
  val animAlpha8 = remember { Animatable(0f, Float.VectorConverter) }
    LaunchedEffect(Unit){
        animAlpha1.animateTo(1f, animationSpec = myKeyframs(0))
    }
    LaunchedEffect(Unit){
        animAlpha2.animateTo(1f, animationSpec = myKeyframs(1))
    }
    LaunchedEffect(Unit){
        animAlpha3.animateTo(1f, animationSpec = myKeyframs(2))
    }
    LaunchedEffect(Unit){
        animAlpha4.animateTo(1f, animationSpec = myKeyframs(3))
    }
    LaunchedEffect(Unit){
        animAlpha5.animateTo(1f, animationSpec = myKeyframs(4))
    }
    LaunchedEffect(Unit){
        animAlpha6.animateTo(1f, animationSpec = myKeyframs(5))
    }
    LaunchedEffect(Unit){
        animAlpha7.animateTo(1f, animationSpec = myKeyframs(6))
    }
    LaunchedEffect(Unit){
        animAlpha8.animateTo(1f, animationSpec = myKeyframs(7))
    }
  Canvas(modifier = Modifier.fillMaxSize()){
  val contentWidth = size.width
  val contentHeight = size.height
  withTransform({
  translate(left = contentWidth / 2, top = contentHeight / 2)}) {
  drawPath(AndroidPath(waterDropModel.water8Path), color = color8, alpha = animAlpha8.value)
  drawPath(AndroidPath(waterDropModel.water7Path), color = color7, alpha = animAlpha7.value)
  drawPath(AndroidPath(waterDropModel.water6Path), color = color6, alpha = animAlpha6.value)
  drawPath(AndroidPath(waterDropModel.water5Path), color = color5, alpha = animAlpha5.value)
  drawPath(AndroidPath(waterDropModel.water4Path), color = color4, alpha = animAlpha4.value)
  drawPath(AndroidPath(waterDropModel.water3Path), color = color3, alpha = animAlpha3.value)
  drawPath(AndroidPath(waterDropModel.water2Path), color = color2, alpha = animAlpha2.value)
  drawPath(AndroidPath(waterDropModel.water1Path), color = color1, alpha = animAlpha1.value)
  }
  }
}
private fun myKeyframs(num:Int):KeyframesSpec<Float>{
    return keyframes{
        durationMillis = 3000
        delayMillis = num * 2000
        0.5f at 1000 with LinearEasing
        0.2f at 2000 with LinearEasing
    }
}

調(diào)用傳入不同的delay值

然后就是外層掃光的動(dòng)畫，像探照燈一樣一圈圈的掃，一共掃7遍，代碼跟層變動(dòng)畫差不多，也是對alpha值做漸變，目前代碼是調(diào)用掃光動(dòng)畫7次，后續(xù)看看如何優(yōu)化性能。每次調(diào)用傳入不同的delay值即可。

@Composable
fun drawWaterDropScan(delayTime:Long){
    val waterDropModel by remember {
        mutableStateOf(WaterDropModel.waterDropMScan)
    }
    val color1 = colorResource(id = waterDropModel.water1.colorResource)
    val color2 = colorResource(id = waterDropModel.water2.colorResource)
    val color3 = colorResource(id = waterDropModel.water3.colorResource)
    val color4 = colorResource(id = waterDropModel.water4.colorResource)
    val color5 = colorResource(id = waterDropModel.water5.colorResource)
    val color6 = colorResource(id = waterDropModel.water6.colorResource)
    val color7 = colorResource(id = waterDropModel.water7.colorResource)
    val color8 = colorResource(id = waterDropModel.water8.colorResource)
    val animAlpha2 = remember { Animatable(0f, Float.VectorConverter) }
    val animAlpha3 = remember { Animatable(0f, Float.VectorConverter) }
    val animAlpha4 = remember { Animatable(0f, Float.VectorConverter) }
    val animAlpha5 = remember { Animatable(0f, Float.VectorConverter) }
    val animAlpha6 = remember { Animatable(0f, Float.VectorConverter) }
    val animAlpha7 = remember { Animatable(0f, Float.VectorConverter) }
    val animAlpha8 = remember { Animatable(0f, Float.VectorConverter) }
    LaunchedEffect(Unit){
        delay(delayTime)
        val map = mutableMapOf<Float, Int>().apply { put(1f, 350) }
        animAlpha2.animateTo(0f, animationSpec = myKeyframs2(700, 0, map))
    }
    LaunchedEffect(Unit){
        delay(delayTime)
        val map = mutableMapOf<Float, Int>().apply { put(0.8f, 315) }
        animAlpha3.animateTo(0f, animationSpec = myKeyframs2(630, 233, map))
    }
    LaunchedEffect(Unit){
        delay(delayTime)
        val map = mutableMapOf<Float, Int>().apply { put(0.55f, 315) }
        animAlpha4.animateTo(0f, animationSpec = myKeyframs2(630, 383, map))
    }
    LaunchedEffect(Unit){
        delay(delayTime)
        val map = mutableMapOf<Float, Int>().apply { put(0.5f, 325) }
        animAlpha5.animateTo(0f, animationSpec = myKeyframs2(650, 533, map))
    }
    LaunchedEffect(Unit){
        delay(delayTime)
        val map = mutableMapOf<Float, Int>().apply { put(0.45f, 325) }
        animAlpha6.animateTo(0f, animationSpec = myKeyframs2(650, 667, map))
    }
    LaunchedEffect(Unit){
        delay(delayTime)
        val map = mutableMapOf<Float, Int>().apply { put(0.35f, 283) }
        animAlpha7.animateTo(0f, animationSpec = myKeyframs2(567, 816, map))
    }
    LaunchedEffect(Unit){
        delay(delayTime)
        val map = mutableMapOf<Float, Int>().apply { put(0.3f, 216) }
        animAlpha8.animateTo(0f, animationSpec = myKeyframs2(433, 983, map))
    }
  Canvas(modifier = Modifier.fillMaxSize()){
  val contentWidth = size.width
  val contentHeight = size.height
  withTransform({
  translate(left = contentWidth / 2, top = contentHeight / 2)
  }) {
  drawPath(AndroidPath(waterDropModel.water8Path), color = color8, alpha = animAlpha8.value)
  drawPath(AndroidPath(waterDropModel.water7Path), color = color7, alpha = animAlpha7.value)
  drawPath(AndroidPath(waterDropModel.water6Path), color = color6, alpha = animAlpha6.value)
  drawPath(AndroidPath(waterDropModel.water5Path), color = color5, alpha = animAlpha5.value)
  drawPath(AndroidPath(waterDropModel.water4Path), color = color4, alpha = animAlpha4.value)
  drawPath(AndroidPath(waterDropModel.water3Path), color = color3, alpha = animAlpha3.value)
  drawPath(AndroidPath(waterDropModel.water2Path), color = color2, alpha = animAlpha2.value)
  drawPath(AndroidPath(waterDropModel.water1Path), color = color1)
  }
  }
}
private fun myKeyframs2(durationMillisParams:Int, delayMillisParams:Int, frames:Map<Float, Int>):KeyframesSpec<Float>{
    return keyframes{
        durationMillis = durationMillisParams
        delayMillis = delayMillisParams
        for ((valueF, timestamp) in frames){
           valueF at timestamp
        }
    }
}
@Preview
@Composable
fun WaterDrop(){
    Box(modifier = Modifier.fillMaxSize()){
        drawWaterDropBg()
        drawWaterDrop()
        for (num in 1 .. 7){
            drawWaterDropScan(delayTime = num * 2000L)
        }
    }
}

代碼跟LocationMarker在一個(gè)Project里面，暫時(shí)沒有添加導(dǎo)航。github.com/yinxiucheng… 下的CustomerComposeView.

以上就是Compose自定義View實(shí)現(xiàn)宇智波斑寫輪眼的詳細(xì)內(nèi)容，更多關(guān)于Compose自定義View的資料請關(guān)注腳本之家其它相關(guān)文章！

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