No HTTP request is send from retrofit /Android/

Question

I'm trying to send data to an API from my Android project using Retrofit. Everything seems to work without errors but no http request leaves the application. I can confirm this with Wireshark screening and API console log. Here is an example pseudo code of this parts of my application:

// sample code

findViewById(R.id.submit_btn).setOnClickListener(this);

@Override
public void onClick(View v) {
    int i = v.getId();
    if (i == R.id.submit_btn){
        Intent intent = new Intent(CurrentActivity.this, HomeActivity.class);

        // myObj is class storing several values and it is defined in separate class
        MyObj obj = new MyObj(** some attributes here **);

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("http://api.address")
                .client(new OkHttpClient())
                .addConverterFactory(GsonConverterFactory.create())
                .build();

        MyAPI api = retrofit.create(MyAPI.class);

        Call<Void> upload = api.newObj(obj);

        startActivity(intent);
        finish();
    }

Not sure what I'm missing. Any ideas?

PS here are the dependencies used by the app for this part:

compile 'com.squareup.retrofit2:retrofit:2.1.0'
compile 'com.google.code.gson:gson:2.6.2'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'
compile 'com.squareup.okhttp3:okhttp:3.0.1'

Answer 1

This only prepares the request, not sends it.

Call<Void> upload = api.newObj(obj);

Try making upload.enqueue()

Answer 2

你永远不会入队或执行调用，执行异步调用服务器使用upload.enqueue(new CallBack here)执行同步立即使用upload.execute()