The methods `newBlockingStub` and `newStub` cannot take a channel object of class `ManagedChannel`.

[DavdGao]

• I'm trying to use grpc in my android project.
• I have generated my java class by protoc (version: libprotoc 3.21.7).
• Here is my proto file:

syntax = "proto3";

option java_package = 'com.example.davdmnn.protos';
option java_multiple_files = false;
option java_generic_services = true;

package fscomm;

service FsComm{
  rpc sendMessage (MessageRequest) returns (MessageResponse) {};
}

message MessageRequest{
  map<string, MsgValue> msg = 1;
}

message MsgValue{
  oneof type {
    mSingle single_msg = 1;
    mList list_msg = 2;
    mDict_keyIsString dict_msg_stringkey = 3;
    mDict_keyIsInt dict_msg_intkey = 4;
  }
}

message mSingle{
  oneof type {
    float float_value = 1;
    int32 int_value = 2;
    string str_value = 3;
  }
}

message mList{
  repeated MsgValue list_value = 1;
}

message mDict_keyIsString{
  map<string, MsgValue> dict_value = 1;
}

message mDict_keyIsInt{
  map<int32, MsgValue> dict_value = 1;
}

message MessageResponse{
  string msg = 1;
}

• When I want to create a new stub as follows, the parameter of methods newStub and newBlockingStub cannot be ManagedChannel as follows

• Here is my dependencies in app.build.gradle

dependencies {
    // grpc
    implementation 'io.grpc:grpc-android:1.49.2'

    implementation 'io.grpc:grpc-okhttp:1.49.2'
    implementation 'io.grpc:grpc-protobuf-lite:1.49.2'
    implementation 'io.grpc:grpc-stub:1.49.2'
    compileOnly 'org.apache.tomcat:annotations-api:6.0.53'

    // protobuf
    implementation "com.google.protobuf:protobuf-java:3.21.7"
    implementation "com.google.protobuf:protobuf-java-util:3.21.7"

    implementation fileTree(includes: ['*.jar'], dir: 'libs')
    implementation 'androidx.appcompat:appcompat:1.5.1'
    implementation 'com.google.android.material:material:1.6.1'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}