使用 AWS Lambda 连接 Android 和 AWS SageMaker

Question

我在 Android 和 AWS Lambda 之间建立了一个连接，该连接将端点设置为 SageMaker。我在连接过程中使用的是 REST API，AWS Cognito 插件设置为无需授权即可访问。

我按照此处所述进行连接： https://aws.amazon.com/blogs/machine-learning/call-an-amazon-sagemaker-model-endpoint-using-amazon-api-gateway-and-aws-lambda/

我的问题是如何发送这些数据：

{"data":"13.49,22.3,86.91,561.0,0.08752,0.07697999999999999,0.047510000000000004,0.033839999999999995,0.1809,0.057179999999999995,0.2338,1.3530000000000002,1.735,20.2,0.004455,0.013819999999999999,0.02095,0.01184,0.01641,0.001956,15.15,31.82,99.0,698.8,0.1162,0.1711,0.2282,0.1282,0.2871,0.06917000000000001"}

以及稍后如何查看收到的回复。有谁知道怎么做，或者我在哪里可以找到如何做的提示？

Answer 1

如果我理解正确，这是您的系统流程：

1. POST Android 设备中的一些数据
2. API 网关接收它
3. 并继续到 AWS Lambda
4. 在 AWS Lambda 中，数据被提取并传递给 Sage Maker

使用 AWS Amplify 创建 POST

从 Android 设备到POST 数据，请按照Amplify API (REST) category documentation。

具体来说，您可以执行以下操作：

val options = RestOptions.builder()
    .addPath("/prod/predictbreastcancer")
    .addBody("{\"data\":\"13.49,22.3,86.91,561.0,0.08752,0.07697999999999999,0.047510000000000004,0.033839999999999995,0.1809,0.057179999999999995,0.2338,1.3530000000000002,1.735,20.2,0.004455,0.013819999999999999,0.02095,0.01184,0.01641,0.001956,15.15,31.82,99.0,698.8,0.1162,0.1711,0.2282,0.1282,0.2871,0.06917000000000001\"}".toByteArray())
    .build()

Amplify.API.post(options,
    { Log.i("Demo", "POST response = $it") },
    { Log.e("Demo", "POST failed", it) }
)

从 EditText 内容创建 POST 正文

您提到您正在使用EditText 小部件来收集输入数据。我假设用户可以输入以逗号分隔的值列表，例如 0.44, 6.11 等。

要提取其内容并构建 POST 正文，您可以：

val input = findViewById(R.id.input) as EditText
val body = JSONObject()
    .put("data", input.text)
    .toString()
    .replaceAll("\"", "\\\"")

在另一个 Activity 中显示响应

浏览您引用的博客，我看不到响应正文内容的示例。但是，您可以通过以下方式检索响应 JSON 并将其传递给新活动。

Amplify.API.post(options,
    { response ->
        val intent = Intent(this, YourOtherActivity::class.java)
        intent.putExtra("json", response.data.asString())
        runOnUiThread { startActivity(intent) }
    },
    { /* handle error ... */ }
)

在YourOtherActivity 中，访问onCreate() 中的额外数据，如下所示：

val json = intent.getStringExtra("json")