Supriyo Mahanta

### My channel.ex file: ```elixir def handle_in("locations", _payload, socket) do broadcast!(socket, "locations", %{ping: "succeed"}) {:reply, {:ok, %{ping: "succeed"}}, socket} end ``` My MainActivity.ex ```java package com.example.phoenix_channel_test; import androidx.appcompat.app.AppCompatActivity; import org.phoenixframework.channels.*;...