android - Jetpack Compose 如何将特定大小的文本组件的文本或内容与左下角或右下角对齐？

Question

如何将文本与 Text 的底部对齐Jetpack Compose 的组件？ TextAlign 只有 Start , End , Left , Center , Right和 Justify选项。

  Text(
        text = "First",
        textAlign = TextAlign.Start,
        modifier = Modifier
            .background(Color(0xFF1976D2))
            .size(200.dp),
        color = Color.White,
    )

我要对齐 Text组件的内容，每个 Text 具有特定大小 使用 modifier.size(x) , 使其文本与底部对齐。图中蓝色矩形为 Text不同大小的文本应该像在经典 Android 中使用 android:gravity 一样对齐其中的文本.
类似于 textAlign = TextAlign.x但对于底部。
从 Box 设置对齐方式对齐 Text里面 Box或 Modifier.align(Alignment.BottomEnd)在 BoxScope做什么android:layout_gravity用于 View ，对齐文本组件，不是内容的 Text组件，您可以看到 difference here .

图像中蓝色矩形的代码是

@Composable
fun BoxExample() {
    Box(
        modifier = Modifier
            .fillMaxWidth()
            .height(250.dp)
            .background(Color.LightGray)

    ) {

        // This is the one at the bottom
        Text(
            text = "First",
            modifier = Modifier
                .background(Color(0xFF1976D2))
                .size(200.dp),
            color = Color.White,
        )

        // This is the one in the middle
        Text(
            text = "Second",
            modifier = Modifier
                .background(Color(0xFF2196F3))
                .size(150.dp),
            color = Color.White
        )

        // This is the one on top
        Text(
            text = "Third ",
            modifier = Modifier
                .background(Color(0xFF64B5F6))
                .size(100.dp),
            color = Color.White
        )
    }
}

对于橙色矩形

@Composable
fun BoxShadowAndAlignmentExample() {

    Box(
        modifier = Modifier
            .fillMaxWidth()
            .height(250.dp)
            .background(Color.LightGray)
            .padding(8.dp)
    ) {

        Box(
            modifier = Modifier.shadow(
                elevation = 4.dp,
                shape = RoundedCornerShape(8.dp)
            )
        ) {
            // This is the one at the bottom
            Text(
                text = "First",
                modifier = Modifier
                    .background(Color(0xFFFFA000))
                    .size(200.dp),
                color = Color.White
            )
        }

        Box(
            modifier = Modifier.shadow(
                elevation = 4.dp,
                shape = RoundedCornerShape(8.dp)
            )
                .align(Alignment.TopEnd)

        ) {
            // This is the one in the middle
            Text(
                text = "Second",
                modifier = Modifier
                    .background(Color(0xFFFFC107))
                    .size(150.dp),
                color = Color.White
            )
        }


        val modifier = Modifier.shadow(
            elevation = 4.dp,
            shape = RoundedCornerShape(8.dp)
        )
            .align(Alignment.BottomStart)

        Box(
            modifier = modifier

        ) {
            // This is the one on top
            Text(
                text = "Third ",
                modifier = Modifier
                    .background(Color(0xFFFFD54F))

                    .size(100.dp),
                color = Color.White
            )
        }
    }
}

Answer 1

使用 align修饰符，您可以将子组件相对于其父组件对齐在特定位置:

Box(modifier = Modifier.fillMaxSize()) {
    Text(modifier = Modifier.align(Alignment.BottomEnd),text = "Aligned to bottom end")
    Text(modifier = Modifier.align(Alignment.BottomStart),text = "Aligned to bottom start")
    Text(modifier = Modifier.align(Alignment.CenterStart),text = "Aligned to start center ")
    Text(modifier = Modifier.align(Alignment.TopCenter),text = "Aligned to top center ")
}