带可绘制元素的 JetPack Compose 按钮

Question

我们如何在 jetpack compose 中实现这一点

我正在做这样的事情

Button(
    elevation = ButtonDefaults.elevation(
        defaultElevation = 0.dp,
        pressedElevation = 8.dp,
        disabledElevation = 0.dp
    ),
    onClick = { onClick },
    shape = RoundedCornerShape(28.dp),
    modifier = modifier
        .fillMaxWidth()
        .shadow(0.dp),
    contentPadding = PaddingValues(15.dp),
    colors = ButtonDefaults.buttonColors(backgroundColor = Color.White),
    border = BorderStroke(1.dp, Color.Grey)
) {
    Box(modifier = modifier.fillMaxWidth(),
        contentAlignment = Alignment.Center) {
        Icon(
            imageVector = imageVector,
            modifier = Modifier
                .size(18.dp),
            contentDescription = "drawable icons",
            tint = Color.Unspecified
        )
        Spacer(modifier = Modifier.width(10.dp))
        Text(
            text = buttonText,
            color = Color.Black,
            textAlign = TextAlign.Center
        )
    }
}

正如您所看到的，Google 徽标就位于文本的左侧，我需要它位于框的开头，那么我该怎么做呢？

Answer 1

正如其他答案中所建议的，您可以用Box.
作为替代方案，您可以简单地使用不带任何容器RowScope的Button。

只需将weight(1f)修饰符应用于Text和offset(x=- iconWidth/2)。

就像是：

Button(
   //....
) {

    Icon(
        imageVector = imageVector,
        modifier = Modifier.size(iconWidth),
        contentDescription = "drawable icons",
        tint = Color.Unspecified
    )
    Text(
        text = "Button",
        color = Color.Black,
        textAlign = TextAlign.Center,
        modifier = Modifier
            .weight(1f)
            .offset(x= -iconWidth/2) //default icon width = 24.dp
    )
}

如果您想使用 a Box，请删除contentAlignment = Alignment.Centerthe 中的Box并使用：

 Box(modifier = Modifier.fillMaxWidth()) {
        Icon( /* ..... */ )
        Text(
            modifier = Modifier.fillMaxWidth(),
            text = "buttonText",
            textAlign = TextAlign.Center
        )
 }

Answer 2

@Composable
fun GoogleButton(
    modifier: Modifier = Modifier,
    imageVector: ImageVector,
    buttonText: String,
    onClick: (isEnabled: Boolean) -> Unit = {},
    enable: Boolean = true,
    backgroundColor: Color,
    fontColor: Color,
) {
    Button(
        onClick = { onClick(enable) },
        modifier = modifier
            .fillMaxWidth()
            .shadow(0.dp)
            .noInteractionClickable(enabled = false) { onClick(enable) },
        elevation = ButtonDefaults.elevation(
            defaultElevation = 0.dp,
            pressedElevation = 0.dp,
            hoveredElevation = 0.dp,
            focusedElevation = 0.dp
        ),
        shape = RoundedCornerShape(28.dp),
        contentPadding = PaddingValues(15.dp),
        colors = ButtonDefaults.buttonColors(
            backgroundColor = backgroundColor,
            contentColor = fontColor
        ),
        border = BorderStroke(1.dp, MaterialTheme.colors.getButtonBorderStroke)
    ) {
        Box(
            modifier = Modifier
                .fillMaxWidth(),
            contentAlignment = Alignment.Center
        ) {
            Row(
                modifier = Modifier
                    .fillMaxWidth()
                    .align(Alignment.CenterStart)
            ) {
                Spacer(modifier = Modifier.width(4.dp))
                Icon(
                    imageVector = imageVector,
                    modifier = Modifier
                        .size(18.dp),
                    contentDescription = "drawable_icons",
                    tint = Color.Unspecified
                )
            }
            Text(
                modifier = Modifier.align(Alignment.Center),
                text = buttonText,
                color = MaterialTheme.colors.loginButtonTextColor,
                textAlign = TextAlign.Center,
                fontSize = 16.sp,
                fontFamily = FontFamily(
                    Font(
                        R.font.roboto_medium
                    )
                )
            )
        }
    }
}