如何在jetpack compose中将彩色图像更改为黑色/白色

Question

我想以黑色/白色显示彩色图像，如何在 android jetpack compose 中使用 colorFilter 来实现？

    Image(
        painter = painter, contentDescription = null,
        modifier = Modifier
            .fillMaxSize(),
        contentScale = scale,
        colorFilter = null
    )

Answer 1

我们可以通过使用 colorMatrix 轻松实现：

    val matrix = ColorMatrix()
    matrix.setToSaturation(0F)
    
    Image(
        painter = painter, contentDescription = null,
        modifier = Modifier
            .fillMaxSize(),
        contentScale = scale,
        colorFilter = ColorFilter.colorMatrix(matrix)
    )