README.md

animateContentSize

接收 animationSpec 和 finishedListener 两个参数

AnimateContentSizeExample.kt

import androidx.compose.animation.animateContentSize
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.size
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

@Composable
fun AnimateContentSizeExample() {
  Box(
    modifier = Modifier.fillMaxSize()
  ) {
    var size by remember { mutableStateOf(50.dp) }
    Box(
      modifier = Modifier
        .align(Alignment.Center)
        .animateContentSize()
        .size(size)
        .background(Color.Blue)
        .clickable {
          size += 50.dp
        }
    )
  }
}