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#region Copyright notice and license
// Copyright 2018 The gRPC Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
using Android.App;
using Android.Widget;
using Android.OS;
using System.Threading.Tasks;
using Grpc.Core;
using Helloworld;
namespace HelloworldXamarin.Droid
{
[Activity(Label = "HelloworldXamarin", MainLauncher = true, Icon = "@mipmap/icon")]
public class MainActivity : Activity
{
const int Port = 50051;
int count = 1;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
Button button = FindViewById<Button>(Resource.Id.myButton);
button.Click += delegate { SayHello(button); };
}
private void SayHello(Button button)
{
Server server = new Server
{
Services = { Greeter.BindService(new GreeterImpl()) },
Ports = { new ServerPort("localhost", Port, ServerCredentials.Insecure) }
};
server.Start();
// use loopback on host machine: https://developer.android.com/studio/run/emulator-networking
//10.0.2.2:50051
Channel channel = new Channel("localhost:50051", ChannelCredentials.Insecure);
var client = new Greeter.GreeterClient(channel);
string user = "Xamarin " + count;
var reply = client.SayHello(new HelloRequest { Name = user });
button.Text = "Greeting: " + reply.Message;
channel.ShutdownAsync().Wait();
server.ShutdownAsync().Wait();
count++;
}
class GreeterImpl : Greeter.GreeterBase
{
// Server side handler of the SayHello RPC
public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)
{
return Task.FromResult(new HelloReply { Message = "Hello " + request.Name });
}
}
}
}
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