Android Network Policy

1. Network Security Config
<network-security-config>
    <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">10.0.2.2</domain>
    </domain-config>
</network-security-config>

2. Android Menifest
<uses-permission android:name="android.permission.INTERNET" />
<application android:networkSecurityConfig="@xml/network_security_config"

3. Call Service
Call<List<Product>> products = service.getAll();

        products.enqueue(new Callback<List<Product>>() {
            @Override
            public void onResponse(Call<List<Product>> call, Response<List<Product>> response) {
                Log.d("DEBUG", response.body().toString());
            }

            @Override
            public void onFailure(Call<List<Product>> call, Throwable t) {
                Log.d("DEBUG", "Fail to connect api");
            }
        });