Esempio per Android - Amazon Polly

Le traduzioni sono generate tramite traduzione automatica. In caso di conflitto tra il contenuto di una traduzione e la versione originale in Inglese, quest'ultima prevarrà.

Esempio per Android

L'esempio seguente utilizza Android SDK per Amazon Polly per leggere il testo specificato utilizzando una voce selezionata da un elenco di voci.

Il codice mostrato di seguito copre i principali processi, ma non gestisce gli errori. Per il codice completo, consulta AWS Mobile SDK for Android Amazon Polly demo.

Inizializzazione

// Cognito pool ID. Pool needs to be unauthenticated pool with // Amazon Polly permissions. String COGNITO_POOL_ID = "YourCognitoIdentityPoolId"; // Region of Amazon Polly. Regions MY_REGION = Regions.US_EAST_1;   // Initialize the Amazon Cognito credentials provider. CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(         getApplicationContext(),         COGNITO_POOL_ID,         MY_REGION ); // Create a client that supports generation of presigned URLs. AmazonPollyPresigningClient client = new AmazonPollyPresigningClient(credentialsProvider);
Visualizza elenco di voci disponibili

// Create describe voices request. DescribeVoicesRequest describeVoicesRequest = new DescribeVoicesRequest(); // Synchronously ask Amazon Polly to describe available TTS voices. DescribeVoicesResult describeVoicesResult = client.describeVoices(describeVoicesRequest); List<Voice> voices = describeVoicesResult.getVoices();
Scarica Audio URL Stream

// Create speech synthesis request. SynthesizeSpeechPresignRequest synthesizeSpeechPresignRequest =         new SynthesizeSpeechPresignRequest()         // Set the text to synthesize.         .withText("Hello world!")         // Select voice for synthesis.         .withVoiceId(voices.get(0).getId()) // "Joanna"         // Set format to MP3.         .withOutputFormat(OutputFormat.Mp3); // Get the presigned URL for synthesized speech audio stream. URL presignedSynthesizeSpeechUrl =         client.getPresignedSynthesizeSpeechUrl(synthesizeSpeechPresignRequest);
Riproduzione dell'audio sintetizzato

// Use MediaPlayer: https://developer.android.com/guide/topics/media/mediaplayer.html // Create a media player to play the synthesized audio stream. MediaPlayer mediaPlayer = new MediaPlayer(); mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); try {     // Set media player's data source to previously obtained URL.     mediaPlayer.setDataSource(presignedSynthesizeSpeechUrl.toString()); } catch (IOException e) {     Log.e(TAG, "Unable to set data source for the media player! " + e.getMessage()); } // Prepare the MediaPlayer asynchronously (since the data source is a network stream). mediaPlayer.prepareAsync(); // Set the callback to start the MediaPlayer when it's prepared. mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {     @Override     public void onPrepared(MediaPlayer mp) {         mp.start();     } }); // Set the callback to release the MediaPlayer after playback is completed. mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { mp.release(); } });