gRPC android 监听server报错ProviderNotFoundException: No functional server found. Try adding a dependen

gRPC android 监听server报错ProviderNotFoundException: No functional server found. Try adding a dependen

ProviderNotFoundException: No functional server found. Try adding a dependency on the grpc-netty or grpc-netty-shaded artifact

 测试老版本io.grpc:grpc-netty:1.1.2，用Server server = ServerBuilder.forPort(port)是正常的。使用新版本io.grpc:grpc-netty:1.42.1 ，必须得用NettyServerBuilder。否则就报上面的错。但JAVA正常，奇怪不。

  private void startServer(int port){
    try {
      Server server = NettyServerBuilder.forPort(port)
              .addService(new GreeterImpl())
              .build()
              .start();
      Log.d("TAG","Server started, listening on " + port);
    } catch (IOException e) {
      e.printStackTrace();
      Log.d("TAG", e.getMessage());
    }
  }

apply plugin: 'com.android.application'
apply plugin: 'com.google.protobuf'

android {
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    compileSdkVersion 27

    defaultConfig {
        applicationId "io.grpc.helloworldexample"
        minSdkVersion 21
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        debug { minifyEnabled false }
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    lintOptions {
        disable 'GoogleAppIndexingWarning', 'HardcodedText', 'InvalidPackage'
        textReport true
        textOutput "stdout"
    }
    configurations.all {
        resolutionStrategy.force 'com.google.code.findbugs:jsr305:3.0.1'
    }
    packagingOptions {
        pickFirst 'meta-INF/INDEX.LIST'
        pickFirst 'meta-INF/LICENSE'
        pickFirst 'meta-INF/io.netty.versions.properties'
    }

    protobuf {
        protoc { artifact = 'com.google.protobuf:protoc:3.17.2' }
        plugins {
            grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.42.0' // CURRENT_GRPC_VERSION
            }
        }

        generateProtoTasks {
            all().each { task ->
                task.builtins {
                    java { option 'lite' }
                }
                task.plugins {
                    grpc { // Options added to --grpc_out
                        option 'lite' }
                }
            }
        }
    }

}



dependencies {
    implementation 'com.android.support:appcompat-v7:27.0.2'

    // You need to build grpc-java to obtain these libraries below.

    implementation 'io.grpc:grpc-netty:1.42.1' // CURRENT_GRPC_VERSION
    implementation 'io.grpc:grpc-protobuf:1.42.0' // CURRENT_GRPC_VERSION
    implementation 'io.grpc:grpc-stub:1.42.0' // CURRENT_GRPC_VERSION
    implementation 'org.apache.tomcat:annotations-api:6.0.53'
}

 找到ip,连接正常。能发能收。