Styjun

i am using TextToSpeechApi for read the text with multiple language & voices.
But it show java.lang.AbstractMethodError: error on SynthesizeSpeechResponse
line. How to solve this.

My gradle :

dependencies 
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'

implementation 'com.google.cloud:google-cloud-translate:1.65.0'
// add these dependencies for the speech client
implementation 'io.grpc:grpc-okhttp:1.10.0'
implementation 'com.google.cloud:google-cloud-speech:0.53.0-alpha'
implementation 'com.google.cloud:google-cloud-texttospeech:0.53.0-beta'

implementation 'com.android.support:cardview-v7:28.0.0'
implementation 'com.android.support:design:28.0.0'
implementation 'com.android.support:recyclerview-v7:28.0.0'

My Java Coding:

public class TextReadCloudApi extends AppCompatActivity 

private static final String TAG = "TextReadCloudApi";
private TextToSpeechClient textToSpeechClient;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) 
 super.onCreate(savedInstanceState);
 setContentView(R.layout.text_read_api);

 Button button = (Button) findViewById(R.id.readBtn);

 button.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View v) 
 Speak();
 
 );


private void Speak() 
 try 
 final InputStream stream = getResources().openRawResource(R.raw.transcribeapi);
 ServiceAccountCredentials credentials = ServiceAccountCredentials.fromStream(stream);
 TextToSpeechSettings settings = TextToSpeechSettings.newBuilder()
 .setCredentialsProvider(FixedCredentialsProvider.create(credentials)).build();
 this.textToSpeechClient = TextToSpeechClient.create(settings);
 SetUp();
 catch (IOException e) 
 e.printStackTrace();
 


@SuppressLint("StaticFieldLeak")
private void SetUp() 

 new AsyncTask<Void, Void, Void>() 
 @Override
 protected Void doInBackground(Void... params) 
 // Set the text input to be synthesized
 SynthesisInput input = SynthesisInput.newBuilder()
 .setText("Hello, World!")
 .build();

 // Build the voice request, select the language code ("en-US") and the ssml voice gender
 // ("neutral")
 VoiceSelectionParams voice = VoiceSelectionParams.newBuilder()
 .setLanguageCode("en")
 .setSsmlGender(SsmlVoiceGender.FEMALE)
 .build();


 // Select the type of audio file you want returned
 AudioConfig audioConfig = AudioConfig.newBuilder()
 .setAudioEncoding(AudioEncoding.MP3)
 .build();

 SynthesizeSpeechRequest speechRequest=SynthesizeSpeechRequest.newBuilder()
 .setVoice(voice)
 .setAudioConfig(audioConfig)
 .setInput(input)
 .build();

 // Perform the text-to-speech request on the text input with the selected voice parameters and
 // audio file type
 if(!textToSpeechClient.isShutdown()) 
 SynthesizeSpeechResponse response=textToSpeechClient.synthesizeSpeech(speechRequest);
// SynthesizeSpeechResponse response=textToSpeechClient.synthesizeSpeechCallable().call(speechRequest);
// SynthesizeSpeechResponse response = textToSpeechClient.synthesizeSpeech(input, voice, audioConfig);

 // Get the audio contents from the response
 ByteString audioContents = response.getAudioContent();

 // Write the response to the output file.
 try 
 OutputStream out = new FileOutputStream("output.mp3");
 out.write(audioContents.toByteArray());
 System.out.println("Audio content written to file "output.mp3"");
 Log.d(TAG, "SetUp: Audio content written to file");
 catch (Exception e) 
 e.printStackTrace();
 
 
 return null;
 
 .execute();

Error :

 Caused by: java.lang.AbstractMethodError: abstract method "com.google.api.gax.tracing.ApiTracer com.google.api.gax.rpc.ApiCallContext.getTracer()"
 at com.google.api.gax.retrying.BasicRetryingFuture.handleAttempt(BasicRetryingFuture.java:141)
 at com.google.api.gax.retrying.CallbackChainRetryingFuture$AttemptCompletionListener.handle(CallbackChainRetryingFuture.java:135)
 at com.google.api.gax.retrying.CallbackChainRetryingFuture$AttemptCompletionListener.run(CallbackChainRetryingFuture.java:117)
 at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:398)
 at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:1030)
 at com.google.common.util.concurrent.AbstractFuture.addListener(AbstractFuture.java:675)
 at com.google.common.util.concurrent.AbstractFuture$TrustedFuture.addListener(AbstractFuture.java:105)
 at com.google.common.util.concurrent.ForwardingListenableFuture.addListener(ForwardingListenableFuture.java:45)
 at com.google.api.gax.retrying.CallbackChainRetryingFuture.setAttemptFuture(CallbackChainRetryingFuture.java:93)
 at com.google.api.gax.rpc.AttemptCallable.call(AttemptCallable.java:89)
 at com.google.api.gax.rpc.RetryingCallable.futureCall(RetryingCallable.java:63)
 at com.google.api.gax.rpc.RetryingCallable.futureCall(RetryingCallable.java:41)
 at com.google.api.gax.rpc.UnaryCallable$1.futureCall(UnaryCallable.java:126)
 at com.google.api.gax.rpc.UnaryCallable.futureCall(UnaryCallable.java:87)
 at com.google.api.gax.rpc.UnaryCallable.call(UnaryCallable.java:112)
 at com.google.cloud.texttospeech.v1.TextToSpeechClient.synthesizeSpeech(TextToSpeechClient.java:270)
 at com.logicvalley.translator.sample.TextReadCloudApi$2.doInBackground(TextReadCloudApi.java:97)
 at com.logicvalley.translator.sample.TextReadCloudApi$2.doInBackground(TextReadCloudApi.java:67)
 at android.os.AsyncTask$2.call(AsyncTask.java:333)
 at java.util.concurrent.FutureTask.run(FutureTask.java:266)
 at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245) 
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) 
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) 
 at java.lang.Thread.run(Thread.java:764) 
 8322

Please anyone give me a solution,

Advance thanks...