Retrofit2 Example Android

Just Create a Interface -

public interface RetrofitApi {

@FormUrlEncoded@POST("user_login")
Call<FXNormalLoginResponce> fixitNormalLogin(@Field("ltype") String ltype,
                                                @Field("emailid") String emailid,
                                                @Field("password") String password);

}

And create class 

import android.util.Log;
import net.technoscore.fixit.constants.AppConstants;
import net.technoscore.fixit.model.FXDeviceRegistrationResponse;
import net.technoscore.fixit.model.FXNormalLoginResponce;
import net.technoscore.fixit.model.FXProfessionalBusinessRegisterResponse;
import net.technoscore.fixit.model.FXRegistrationResponce;
import java.util.concurrent.TimeUnit;
import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class RetrofitHelper {
    private static RetrofitHelper ourInstance = new RetrofitHelper();

    public static RetrofitHelper getInstance() {
        return ourInstance;
    }

    private RetrofitHelper() {
    }

    RetrofitApi retrofitapi;

    public void init() {

        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).
                connectTimeout(5, TimeUnit.MINUTES)
                .readTimeout(5, TimeUnit.MINUTES)
                .build();


        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(AppConstants.APP_BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .client(client)
                .build();

        retrofitapi = retrofit.create(RetrofitApi.class);
    }


public void callNormalLogin(Callback<FXNormalLoginResponce> callback, String ltype
        , String emailid, String password    ) {
    Call<FXNormalLoginResponce> response;

    Log.d("userid", "userid** " + ltype);
    Log.d("userid", "emailid** " + emailid);
    Log.d("userid", "password** " + password);

    response = retrofitapi.fixitNormalLogin(ltype, emailid, password);
    response.enqueue(callback);
}

}


Example to hit service


public class CustomerSignInActivity extends AppCompatActivity implements 
Callback<FXNormalLoginResponce> {

    RippleView button_sign_up, button_customer_sign_in;
    CustomFontTextView text_sign_up;
    EditText enter_mail, enter_password, edtemail_id, edt_password;
    RippleView rplSignIn;
    RelativeLayout rel_sign_up;
    AlertDialog dialog;
    int currentApiVersion = android.os.Build.VERSION.SDK_INT;

    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login_client_activity);


        inIt();


        // Button Clicks
        rplSignIn.setOnRippleCompleteListener(new RippleView.OnRippleCompleteListener() {
            @Override            public void onComplete(RippleView rippleView) {
                validations();
            }
        });

        rel_sign_up.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {
                startActivity(new Intent(getApplicationContext(), 
                          CustomerSignUPActivity.class));

            }
        });
    }

    public void validations() {
        dialog.show();
        RetrofitHelper.getInstance().callNormalLogin
        (this, "1", edtemail_id.getText().toString().trim()
        , edt_password.getText().toString().trim());
    }

    @Override    protected void onResume() {
        super.onResume();

        final int flags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE 
               | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION               
               | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN                
               | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION                
               | View.SYSTEM_UI_FLAG_FULLSCREEN                
               | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;

        if (currentApiVersion >= 19) {

            getWindow().getDecorView().setSystemUiVisibility(flags);
            
            decorView.setOnSystemUiVisibilityChangeListener
              (new View.OnSystemUiVisibilityChangeListener() {

                        @Override                       
                         public void onSystemUiVisibilityChange(int visibility) {
                            if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
                                decorView.setSystemUiVisibility(flags);
                            }
                        }
                    });
        }
    }


    // initialization    public void inIt() {

        edtemail_id = (EditText) findViewById(R.id.edtemail_id);
        edt_password = (EditText) findViewById(R.id.edt_password);
        dialog = new SpotsDialog(CustomerSignInActivity.this, R.style.Custom);
        rplSignIn = (RippleView) findViewById(R.id.rplSignIn);
        rel_sign_up = (RelativeLayout) findViewById(R.id.rel_sign_up);


    }

    public boolean emailValidator(String email) {
        Pattern pattern;
        Matcher matcher;
        final String EMAIL_PATTERN = 
            "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
        pattern = Pattern.compile(EMAIL_PATTERN);
        matcher = pattern.matcher(email);
        return matcher.matches();
    }


    @Override   
 public void onResponse(Call<FXNormalLoginResponce> call, Response<FXNormalLoginResponce> 
   response) {
        dialog.dismiss();

        ArrayList<FXNormalLoginData> data = response.body().getData();
        Response_meta resmeta = response.body().getResponse_meta();
        if (Integer.parseInt(resmeta.getCode()) == 200) {

            SweetAlertDialog successDialog = new SweetAlertDialog
            (this, SweetAlertDialog.SUCCESS_TYPE);
            successDialog.getProgressHelper().setBarColor(Color.parseColor("#6CD3B5"));
            successDialog.setTitleText(resmeta.getMessage());

            successDialog.setCancelable(false);
            successDialog.show();
            successDialog.setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener() {
                @Override                public void onClick(SweetAlertDialog sDialog) {
                    sDialog.dismissWithAnimation();
                    startActivity(new Intent(getApplicationContext(), LandingScreen.class));
                }
            });
        } else {

            FXResponseErrors[] errors = response.body().getResponse_meta().getErrors();

            final SweetAlertDialog errorDialog = new SweetAlertDialog
           (this, SweetAlertDialog.ERROR_TYPE);
            errorDialog.getProgressHelper().setBarColor(Color.parseColor("#6CD3B5"));
            errorDialog.setTitleText(resmeta.getMessage());
          if(data.size()>0)
          {
              errorDialog.setTitleText(data.get(0).getMessage());
          }
            else            if(errors.length > 0 ) {
                errorDialog.setTitleText(errors[0].getError());
            }
            else                errorDialog.setTitleText(resmeta.getMessage());
            errorDialog.setCancelable(false);
            errorDialog.show();
            errorDialog.setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener()
           {
                @Override                public void onClick(SweetAlertDialog sDialog) {
                    sDialog.dismissWithAnimation();
                    errorDialog.dismiss();
                }
            });
        }


    }

    @Override    public void onFailure(Call<FXNormalLoginResponce> call, Throwable t) {
        dialog.dismiss();
    }
}



Another way to implement Retrofit2    





public class Singleton {

    Context mContext;
    private static Singleton ourInstance = new Singleton();

    public static Singleton getInstance() {
        return ourInstance;
    }

    private Singleton() {
    }

    private User mUser;

    // prolincLogin    public ApiService getApi() {

 
        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

        OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor)
   .connectTimeout(10, TimeUnit.SECONDS)
                .readTimeout(30, TimeUnit.SECONDS).build();
        Retrofit retrofit = new Retrofit.Builder()
                //  .baseUrl("http://prolinc.in/prolincApi/")                
         .baseUrl("http://prolinc.in/prolinc_dev/prolincApi/")
                .client(client)
                        //.baseUrl("http://192.168.1.87/prolinc/prolincApi/") 
.addConverterFactory(GsonConverterFactory.create())
               /* .addConverterFactory(GsonConverterFactory.create(gson))*/               
 .build();


        return retrofit.create(ApiService.class);

    }


}



Example to hit service

public void sendOTP() {
    SharedPrefHelper sph = new SharedPrefHelper(this);
    Gson gsn = new Gson();
    String js = sph.getString("USERDATA", "");
    UserData objUserData = gsn.fromJson(js, UserData.class);
    String token = objUserData.getToken();
    String UserID = objUserData.getUserId();
    String phone = objUserData.getPhone();
    mApiService = Singleton.getInstance().getApi();
    mApiService.sedOTP(UserID, phone).enqueue
 (new Callback<AbstractResponseList<ResponseMeta, OTPModel>>() {
        @Override       
 public void onResponse(Response<AbstractResponseList<ResponseMeta, OTPModel>> response) {

            ResponseMeta responseMeta = response.body().getResponseMeta();
            List<OTPModel> data = response.body().getData();
            if (responseMeta.getCode() == 200) {
                Toast.makeText(OTPVerificationActivity.this, 
            data.get(0).getMessage(), Toast.LENGTH_SHORT).show();

            } else {

            }
        }

        @Override        
      public void onFailure(Throwable t) {
    Toast.makeText(OTPVerificationActivity.this, "Try again!", Toast.LENGTH_SHORT).show();
        }
    });
}