Use AWS SDK

If you need functionality in the AWS services used by the Amplify Predictions category that isn't available, we provide an escape hatch so you can get a reference to that service. For example, to get a reference to RekognitionClient:

Learn more about consuming Kotlin clients from Java using either a blocking interface or an equivalent async interface based on futures here.

1// Obtain reference to the plugin
2AWSPredictionsPlugin predictionsPlugin = (AWSPredictionsPlugin)
3  Amplify.Predictions.getPlugin("awsPredictionsPlugin");
4AWSPredictionsEscapeHatch escapeHatch = predictionsPlugin.getEscapeHatch();
5
6// Send a new request to the Rekognition endpoint directly using the client
7RekognitionClient client = escapeHatch.getRekognitionClient();
8CreateCollectionRequest request = CreateCollectionRequest.Companion.invoke((requestBuilder) -> {
9  requestBuilder.setCollectionId("<new-collection-id-here>");
10  return Unit.INSTANCE;
11});
12client.createCollection(request, new Continuation<CreateCollectionResponse>() {
13  @NonNull
14  @Override
15  public CoroutineContext getContext() {
16    return GlobalScope.INSTANCE.getCoroutineContext();
17  }
18
19  @Override
20  public void resumeWith(@NonNull Object resultOrException) {
21    Log.i("MyAmplifyApp", resultOrException.toString());
22  }
23});

1// Obtain reference to the plugin
2val plugin = Amplify.Predictions.getPlugin("awsPredictionsPlugin")
3val escapeHatch = (plugin as AWSPredictionsPlugin).escapeHatch
4
5// Send a new request to the Rekognition endpoint directly using the client
6val client = escapeHatch.rekognitionClient
7val request = CreateCollectionRequest {
8  collectionId = "<new-collection-id-here>"
9}
10client.createCollection(request)

In addition to the Amazon Polly APIs, the PollyClient returned in the escape hatch provides a way to create a presigned URL for a text to speech request. An example of creating a presigned URL is below.

1// Obtain reference to the plugin
2AWSPredictionsPlugin predictionsPlugin = (AWSPredictionsPlugin)
3  Amplify.Predictions.getPlugin("awsPredictionsPlugin");
4AWSPredictionsEscapeHatch escapeHatch = predictionsPlugin.getEscapeHatch();
5
6// Create a presigned URL to convert text to speech using the client
7AmazonPollyPresigningClient client = (AmazonPollyPresigningClient) escapeHatch.getPollyClient();
8SynthesizeSpeechRequest request = SynthesizeSpeechRequest.Companion.invoke((requestBuilder) -> {
9  requestBuilder.setLanguageCode(LanguageCode.EnUs.INSTANCE);
10  requestBuilder.setText("I like to eat spaghetti");
11  return Unit.INSTANCE;
12});
13
14// The presigned URL needs to be created on a worker thread
15runOnUiThread(new Runnable() {
16  @Override
17  public void run() {
18    URL url = client.getPresignedSynthesizeSpeechUrl(request);
19  }
20});

1// Obtain reference to the plugin
2val plugin = Amplify.Predictions.getPlugin("awsPredictionsPlugin")
3val escapeHatch = (plugin as AWSPredictionsPlugin).escapeHatch
4
5// Create a presigned URL to convert text to speech using the client
6val client = escapeHatch.pollyClient as AmazonPollyPresigningClient
7val request = SynthesizeSpeechRequest {
8  languageCode = LanguageCode.EnUs
9  text = "I like to eat spaghetti"
10}
11
12// The presigned URL needs to be created on a worker thread
13runOnUiThread {
14  val url = client.getPresignedSynthesizeSpeechUrl(request)
15}

API Documentation Resources

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