这是我第一次发帖，所以我对规则不太熟悉，但是这里有。 我一直试图让Google Cloud Speech API在Android上运行，但无济于事。相同的代码在Java上运行得很好，但在Android上却不行。 我的代码运行正常，直到我使用语音客户端调用识别方法。 这是错误：
11-02 18:38:03.922 6959-6982/capstone.speechrecognitionsimple E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
Process: capstone.speechrecognitionsimple, PID: 6959
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:304)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: com.google.common.util.concurrent.ExecutionError: java.lang.AbstractMethodError: abstract method "java.util.concurrent.ScheduledExecutorService io.grpc.internal.ClientTransportFactory.getScheduledExecutorService()"
at com.google.common.util.concurrent.Futures.wrapAndThrowUnchecked(Futures.java:1319)
at com.google.common.util.concurrent.Futures.getUnchecked(Futures.java:1311)
at com.google.api.gax.rpc.ApiExceptions.callAndTranslateApiException(ApiExceptions.java:53)
at com.google.api.gax.rpc.UnaryCallable.call(UnaryCallable.java:114)
at com.google.cloud.speech.v1.SpeechClient.recognize(SpeechClient.java:245)
at capstone.speechrecognitionsimple.MainActivity$InitTask.doInBackground(MainActivity.java:94)
at capstone.speechrecognitionsimple.MainActivity$InitTask.doInBackground(MainActivity.java:38)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.AbstractMethodError: abstract method "java.util.concurrent.ScheduledExecutorService io.grpc.internal.ClientTransportFactory.getScheduledExecutorService()"
at io.grpc.internal.CallCredentialsApplyingTransportFactory.getScheduledExecutorService(CallCredentialsApplyingTransportFactory.java:52)
at io.grpc.internal.ManagedChannelImpl$RealChannel.newCall(ManagedChannelImpl.java:557)
at com.google.api.gax.grpc.GrpcHeaderInterceptor.interceptCall(GrpcHeaderInterceptor.java:59)
at io.grpc.ClientInterceptors$InterceptorChannel.newCall(ClientInterceptors.java:104)
at io.grpc.internal.ManagedChannelImpl.newCall(ManagedChannelImpl.java:536)
at com.google.api.gax.grpc.GrpcDirectCallable.newCall(GrpcDirectCallable.java:76)
at com.google.api.gax.grpc.GrpcDirectCallable.futureCall(GrpcDirectCallable.java:70)
at com.google.api.gax.grpc.GrpcExceptionCallable.futureCall(GrpcExceptionCallable.java:65)
at com.google.api.gax.grpc.GrpcAttemptCallable.call(GrpcAttemptCallable.java:80)
at com.google.api.gax.grpc.GrpcRetryingCallable.futureCall(GrpcRetryingCallable.java:64)
at com.google.api.gax.grpc.GrpcRetryingCallable.futureCall(GrpcRetryingCallable.java:46)
at com.google.api.gax.rpc.EntryPointUnaryCallable.futureCall(EntryPointUnaryCallable.java:70)
at com.google.api.gax.rpc.UnaryCallable.futureCall(UnaryCallable.java:89)
at com.google.api.gax.rpc.UnaryCallable.call(UnaryCallable.java:114)
at com.google.cloud.speech.v1.SpeechClient.recognize(SpeechClient.java:245)
at capstone.speechrecognitionsimple.MainActivity$InitTask.doInBackground(MainActivity.java:94)
at capstone.speechrecognitionsimple.MainActivity$InitTask.doInBackground(MainActivity.java:38)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
我不知道为什么会这样。这是我的代码：
package capstone.speechrecognitionsimple;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import com.google.api.gax.core.FixedCredentialsProvider;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.speech.v1.RecognitionAudio;
import com.google.cloud.speech.v1.RecognitionConfig;
import com.google.cloud.speech.v1.RecognizeRequest;
import com.google.cloud.speech.v1.RecognizeResponse;
import com.google.cloud.speech.v1.SpeechClient;
import com.google.cloud.speech.v1.SpeechRecognitionAlternative;
import com.google.cloud.speech.v1.SpeechRecognitionResult;
import com.google.cloud.speech.v1.SpeechSettings;
import com.google.protobuf.ByteString;
import org.apache.commons.io.IOUtils;
import java.io.InputStream;
import java.util.List;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
InitTask init = new InitTask();
init.execute();
}
class InitTask extends AsyncTask<ByteString, Void, String> {
SpeechClient speechClient = null;
protected String doInBackground(ByteString... strings) {
String transcript = "Transcript:\n";
try {
Log.i("InitTask", "Creating client...");
InputStream credentialsStream = getAssets().open("credentials.json");
GoogleCredentials credentials = GoogleCredentials.fromStream(credentialsStream);
FixedCredentialsProvider credentialsProvider = FixedCredentialsProvider.create(credentials);
InputStream path = getAssets().open("audio.raw");
byte[] data = IOUtils.toByteArray(path);
ByteString audioBytes = ByteString.copyFrom(data);
SpeechSettings speechSettings =
SpeechSettings.newBuilder()
.setCredentialsProvider(credentialsProvider)
.build();
Log.i("InitTask", "Settings Created");
speechClient = SpeechClient.create(speechSettings);
Log.i("InitTask", "Client Created");
RecognitionConfig.AudioEncoding encoding = RecognitionConfig.AudioEncoding.LINEAR16;
Log.i("InitTask", "Encoding Created");
int sampleRateHertz = 16000;
String languageCode = "en-US";
RecognitionConfig config = RecognitionConfig.newBuilder()
.setEncoding(encoding)
.setSampleRateHertz(sampleRateHertz)
.setLanguageCode(languageCode)
.build();
Log.i("finalRec", "Config Created");
RecognitionAudio audio = RecognitionAudio.newBuilder()
.setContent(audioBytes)
.build();
Log.i("finalRec", "Audio Created");
RecognizeRequest request = RecognizeRequest.newBuilder()
.setConfig(config)
.setAudio(audio)
.build();
RecognizeResponse response = speechClient.recognize(request);
Log.i("finalRec", "Called RECOGNIZE");
List<SpeechRecognitionResult> results = response.getResultsList();
for (SpeechRecognitionResult result : results) {
List<SpeechRecognitionAlternative> alternatives = result.getAlternativesList();
for (SpeechRecognitionAlternative alternative : alternatives) {
transcript+= alternative.getTranscript();
}
}
}
catch(Exception e){
Log.e("Client", "" + e.toString());
e.printStackTrace();
}
try {
speechClient.close();
} catch (Exception e) {
Log.e("Client", "" + e.toString());
e.printStackTrace();
}
return transcript;
}
protected void onPostExecute(String transcript) {
Log.i("Transcript", "" +transcript);
}
}
}
最后，这是我的gradle构建文件：
apply plugin: 'com.android.application'
apply plugin: 'com.google.protobuf'
ext {
grpcVersion = '1.4.0'
}
android {
compileSdkVersion 26
defaultConfig {
applicationId "capstone.speechrecognitionsimple"
minSdkVersion 15
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
javaCompileOptions{
annotationProcessorOptions{
includeCompileClasspath = true
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
configurations.all {
resolutionStrategy.force 'com.google.code.findbugs:jsr305:3.0.2'
}
packagingOptions {
exclude 'META-INF/DEPENDENCIES'
exclude 'META-INF/NOTICE'
exclude 'META-INF/LICENSE'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/NOTICE.txt'
exclude 'META-INF/INDEX.LIST'
exclude 'META-INF/io.netty.versions.properties'
exclude 'META-INF/io.grpc.ManagedChannelProvider'
exclude 'META-INF/services/io.grpc.ManagedChannelProvider'
exclude 'project.properties'
pickFirst 'META-INF/license.txt'
}
}
protobuf {
protoc {
artifact = 'com.google.protobuf:protoc:3.3.0'
}
plugins {
javalite {
artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
}
grpc {
artifact = "io.grpc:protoc-gen-grpc-java:${grpcVersion}"
}
}
generateProtoTasks {
all().each { task ->
task.plugins {
javalite {}
grpc {
// Options added to --grpc_out
option 'lite'
}
}
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
provided 'com.jakewharton.auto.value:auto-value-annotations:1.4'
annotationProcessor 'com.google.auto.value:auto-value:1.4.1'
// gRPC
compile "io.grpc:grpc-okhttp:$grpcVersion"
compile "io.grpc:grpc-protobuf-lite:$grpcVersion"
compile "io.grpc:grpc-stub:$grpcVersion"
compile 'javax.annotation:javax.annotation-api:1.2'
protobuf 'com.google.protobuf:protobuf-java:3.3.1'
compile group: 'com.google.api.grpc', name: 'grpc-google-cloud-speech-v1', version: '0.1.13'
compile group: 'com.google.cloud', name: 'google-cloud-speech', version: '0.26.0-alpha'
// OAuth2 for Google API
compile('com.google.auth:google-auth-library-oauth2-http:0.7.0') {
exclude module: 'httpclient'
}
compile 'com.android.support:multidex:1.0.0'
}
答案 0 :(得分：1)
我在Protobuf中遇到了同样的问题。对于遇到此问题的其他人，请确保您在顶级build.gradle中具有以下内容：
classpath'com.google.protobuf：protobuf-gradle-plugin：0.8.6'