使用Jetpack Compose实现翻转卡片效果流程详解

目录

• 介绍
• 执行
• ML Kit银行卡识别
• 输出
• 结论

如何使用 Jetpack Compose 创建翻转卡片效果

介绍

在电子商务和银行应用程序中输入卡信息是很常见的情况。我认为让用户更轻松地处理这种情况并创建更吸引眼球的 UI 将很有用。大多数应用程序/网站都喜欢它。

执行

在开发阶段，您需要做的是打开一个 Android 项目并实施 Compose 库。

如果我们继续编码，我们可以检查以下 Compose 代码。

您可以根据上面的设计在屏幕上创建您的卡片。

@Composable
fun AddCreditCard(backgroundColor: Color) {
    var rotated by remember { mutableStateOf(false) }
    val cardType =
        when (result.value?.organization) {
            "MasterCard" -> painterResource(R.drawable.mc)
            "VISA" -> painterResource(R.drawable.visa)
            else -> painterResource(R.drawable.ic_launcher_background)
        }
    val rotation by animateFloatAsState(
        targetValue = if (rotated) 180f else 0f,
        animationSpec = tween(500)
    )
    val animateFront by animateFloatAsState(
        targetValue = if (!rotated) 1f else 0f,
        animationSpec = tween(500)
    )
    val animateBack by animateFloatAsState(
        targetValue = if (rotated) 1f else 0f,
        animationSpec = tween(500)
    )
    Card(
        modifier = Modifier
            .height(220.dp)
            .fillMaxWidth()
            .padding(10.dp)
            .graphicsLayer {
                rotationY = rotation
                cameraDistance = 8 * density
            }
            .clickable {
                rotated = !rotated
            },
        shape = RoundedCornerShape(14.dp),
        elevation = 4.dp,
        backgroundColor = backgroundColor,
        contentColor = Color.White
    ) {
        if (!rotated) {
            Column(
                horizontalAlignment = Alignment.Start,
                verticalArrangement = Arrangement.SpaceBetween,
                modifier = Modifier.padding(start = 8.dp, end = 8.dp, bottom = 8.dp),
            ) {
                Row(horizontalArrangement = Arrangement.SpaceBetween) {
                    Icon(
                        painter = painterResource(R.drawable.ic_contactless),
                        contentDescription = "test",
                        modifier = Modifier
                            .width(50.dp)
                            .height(50.dp)
                            .padding(top = 6.dp, bottom = 6.dp, end = 20.dp)
                            .graphicsLayer {
                                alpha = animateFront
                            },
                        tint = Color.White
                    )
                    Spacer(modifier = Modifier.weight(1f))
                    Image(
                        painter = cardType,
                        contentDescription = "test",
                        modifier = Modifier
                            .width(50.dp)
                            .height(50.dp)
                            .graphicsLayer {
                                alpha = animateFront
                            }
                    )
                }
                result.value?.number?.let {
                    Text(
                        text = it,
                        modifier = Modifier
                            .padding(top = 16.dp)
                            .graphicsLayer {
                                alpha = animateFront
                            },
                        fontFamily = fontName,
                        fontWeight = FontWeight.Normal,
                        fontSize = 25.sp
                    )
                }
                Row(horizontalArrangement = Arrangement.SpaceBetween) {
                    Column(horizontalAlignment = Alignment.Start) {
                        Text(
                            text = "Card Holder",
                            color = Color.Gray,
                            fontSize = 9.sp,
                            fontWeight = FontWeight.Bold,
                            modifier = Modifier
                                .graphicsLayer {
                                    alpha = animateFront
                                }
                        )
                        Text(
                            text = "Mehmet Yozgatli",
                            color = Color.White,
                            fontSize = 15.sp,
                            fontWeight = FontWeight.Bold,
                            modifier = Modifier
                                .graphicsLayer {
                                    alpha = animateFront
                                }
                        )
                    }
                    Spacer(modifier = Modifier.weight(1f))
                    Column(horizontalAlignment = Alignment.Start) {
                        Text(
                            text = "VALID THRU",
                            color = Color.Gray,
                            fontSize = 9.sp,
                            fontWeight = FontWeight.Bold,
                            modifier = Modifier
                                .graphicsLayer {
                                    alpha = animateFront
                                }
                        )
                        result.value?.expire?.let {
                            Text(
                                text = it,
                                color = Color.White,
                                fontSize = 15.sp,
                                fontWeight = FontWeight.Bold,
                                modifier = Modifier
                                    .graphicsLayer {
                                        alpha = animateFront
                                    }
                            )
                        }
                    }
                }
            }
        } else {
            Column(
                modifier = Modifier.padding(top = 20.dp),
            ) {
                Divider(
                    modifier = Modifier
                        .graphicsLayer {
                            alpha = animateBack
                        }, color = Color.Black, thickness = 50.dp
                )
                Text(
                    text = "123",
                    color = Color.Black,
                    modifier = Modifier
                        .padding(10.dp)
                        .background(Color.White)
                        .fillMaxWidth()
                        .graphicsLayer {
                            alpha = animateBack
                            rotationY = rotation
                        }
                        .padding(10.dp),
                    fontSize = 15.sp,
                    textAlign = TextAlign.End
                )
                Text(
                    text = "Developed by Mehmet Yozgatli",
                    color = Color.White,
                    modifier = Modifier
                        .fillMaxWidth()
                        .graphicsLayer {
                            alpha = animateBack
                            rotationY = rotation
                        }
                        .padding(5.dp),
                    fontFamily = fontName,
                    fontWeight = FontWeight.Thin,
                    fontSize = 10.sp,
                    textAlign = TextAlign.Center
                )
            }
        }
    }
}

创建卡片后，将旋转、animateFront 和 animateBack 值作为参数传递给组件时，就完成了动画部分。

ML Kit银行卡识别

通过使用华为机器学习服务的银行卡识别服务，您可以为用户提供极大的便利。

您可以按照官方文档中的实施步骤进行操作。

https://developer.huawei.com/consumer/en/doc/development/hiai-Guides/dev-process-0000001050038076

输出

卡片翻转效果

使用机器学习套件获取信息

结论

重要的是我们的应用程序要易于使用并让事情变得简单。

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