Retrofit 备注

compile ‘com.squareup.retrofit:retrofit:2.0.0-beta2‘
compile ‘com.squareup.retrofit:converter-gson:2.0.0-beta2‘

public interface LoginService {
    @POST("/test")
    Call<LoginResponse> loginHandler(@Query("username")String username, @Query("username")String password);
}

public class LoginResponse{
    private String result;

    public String getResult(){
        return this.result;
    }
}

fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Retrofit retrofit = new Retrofit.Builder()
                        .baseUrl("http://192.168.0.12:3000")
                        .addConverterFactory(GsonConverterFactory.create())
                        .build();

                LoginService service = retrofit.create(LoginService.class);

                Call<LoginResponse> call = service.loginHandler("fredric", "fredric");

                call.enqueue(new Callback<LoginResponse>() {
                    @Override
                    public void onResponse(Response<LoginResponse> response, Retrofit retrofit) {
                        System.out.println(response.body().getResult());
                    }

                    @Override
                    public void onFailure(Throwable t) {
                        System.out.println("err msg:"+t.getMessage());
                    }
                });
            }
        });