Android Compose 使用 SVG 作为图标

依赖

val coilVersion = "2.5.0"

dependencies {
    // ...
    implementation("io.coil-kt:coil-compose:$coilVersion")
    implementation("io.coil-kt:coil-svg:$coilVersion")
}

工具类

package com.example.util

import androidx.compose.runtime.Composable
import androidx.compose.ui.graphics.FilterQuality
import androidx.compose.ui.graphics.drawscope.DrawScope
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.platform.LocalContext
import coil.ImageLoader
import coil.compose.AsyncImagePainter
import coil.compose.rememberAsyncImagePainter
import coil.decode.SvgDecoder

@Composable
fun rememberSvgPainter(
    model: Any?,
    imageLoader: ImageLoader = ImageLoader.Builder(LocalContext.current)
        .components {
            add(SvgDecoder.Factory())
        }
        .build(),
    transform: (AsyncImagePainter.State) -> AsyncImagePainter.State = AsyncImagePainter.DefaultTransform,
    onState: ((AsyncImagePainter.State) -> Unit)? = null,
    contentScale: ContentScale = ContentScale.Fit,
    filterQuality: FilterQuality = DrawScope.DefaultFilterQuality,
): AsyncImagePainter {
    return rememberAsyncImagePainter(
        model = model,
        imageLoader = imageLoader,
        transform = transform,
        onState = onState,
        contentScale = contentScale,
        filterQuality = filterQuality
    )
}

@Composable
fun rememberAssetsPainter(
    path: String,
    imageLoader: ImageLoader = ImageLoader.Builder(LocalContext.current)
        .components {
            add(SvgDecoder.Factory())
        }
        .build(),
    transform: (AsyncImagePainter.State) -> AsyncImagePainter.State = AsyncImagePainter.DefaultTransform,
    onState: ((AsyncImagePainter.State) -> Unit)? = null,
    contentScale: ContentScale = ContentScale.Fit,
    filterQuality: FilterQuality = DrawScope.DefaultFilterQuality,
): AsyncImagePainter {
    return rememberAsyncImagePainter(
        model = "file:///android_asset/${path}",
        imageLoader = imageLoader,
        transform = transform,
        onState = onState,
        contentScale = contentScale,
        filterQuality = filterQuality
    )
}

图标放在 assets (app\src\main\assets) 目录的 drawable 文件夹

// assets
├─assets
│  └─drawable
│          undo_black_24dp.svg

然后就可以这样调用

Icon(
    rememberAssetsPainter(path = "drawable/undo_black_24dp.svg"),
    contentDescription = "撤销"
)