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 A GUEST   JAN 16TH, 2018   49   NEVER

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package com.example.dmust.restaurantapp;

import android.util.Log;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONObject;

import java.io.IOException;

import okhttp3.OkHttpClient;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;


public class UserManager
{
    User user = null;
    private ServiceCallback callback = new ServiceCallback() { //POSSIBLE FAILS AS ITS A SERVICECALLBACK AND NOT THE RETROFIT CALLBACK??- BUT REMOVE ANYWAYS
        @Override
        public Response successful(Response response)
        {
            if(response!=null)
            {
                Log.d("response.body", response.body().toString());
            }
            else
            {
                response = null;
            }
            return response;
        }

        @Override
        public void fail(Throwable t)
        {
            Log.d("failed",t.getMessage());
        }
    };

    public UserManager()
    {
    }

    public String login(String username, String password)
    {
        String outcome;
        UserClient client = ServiceGenerator.createService(UserClient.class);
        Call<User> call = client.getUserByName(username);

        call.enqueue(
                new Callback<User>() {
            @Override
            public void onResponse(Call<User> call, Response<User> response)
            {
//                user = response.body();
//                if(user != null)
//                {
//                    Log.d("Got the user!", user.toString());
//                }

HERE IS WHERE THE RESPONSE IS , SO NOW YOU COULD PASS INFO TO A FUNCTION TO VALIDATE AND THEN FINALLY IF ALL IS GOOD DO SOMETHING LIKE
getActivityMain().lOGINSUCCESS(user);
                //callback.successful(response);
            }

            @Override
            public void onFailure(Call<User> call, Throwable t)
            {
                Log.d("Error", "Error: " + t.getMessage());
HERE IS WHERE THE Fail IS , DO SOMETHING LIKE
getActivityMain().lOGINFAILED(user);

// callback.fail(t);
            }
        });



//        if(user != null)
//        {
//            if (user.getPassword().equalsIgnoreCase(password))
//            {
//                outcome = "success";
//            }
//            else
//            {
//                outcome = "failure";
//            }
//        }
//        else
//        {
//            outcome = "failure";
//        }
        return "success";

    }

}

package com.example.dmust.restaurantapp;

import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class ServiceGenerator
{
    private final static String API_BASE_URL = "http://10.0.2.2:5000/";
    private static OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

    private static Retrofit.Builder builder = new Retrofit.Builder()
            .baseUrl(API_BASE_URL)
            .addConverterFactory(GsonConverterFactory.create());

    private static Retrofit retrofit = builder.client(httpClient.build()).build();

    public static <S> S createService(Class<S> serviceClass)
    {
        return retrofit.create(serviceClass);
    }
}

package com.example.dmust.restaurantapp;

import retrofit2.Response;

public interface ServiceCallback
{
    Response successful(Response response);
    void fail(Throwable t);
}

package com.example.dmust.restaurantapp;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.JsonReader;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;

import okhttp3.OkHttpClient;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class MainActivity extends AppCompatActivity
{
    private TextView textView;
    private UserManager userManager;

	Callback loginCallback;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        textView = (TextView) findViewById(R.id.textView);
        setSupportActionBar(toolbar);

        Spinner spinner = (Spinner) findViewById(R.id.spinner);
        // Create an ArrayAdapter using the string array and a default spinner layout
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
                        R.array.user_types, android.R.layout.simple_spinner_item);
        // Specify the layout to use when the list of choices appears
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        // Apply the adapter to the spinner
        spinner.setAdapter(adapter);

        userManager = new UserManager();

        /*
        String API_BASE_URL = "http://10.0.2.2:5000/";
        OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

        Retrofit.Builder builder = new Retrofit.Builder()
                .baseUrl(API_BASE_URL)
                .addConverterFactory(GsonConverterFactory.create());

        Retrofit retrofit = builder.client(httpClient.build()).build();

        UserClient client = retrofit.create(UserClient.class);
        Call<List<User>> call = client.allUsers();

        call.enqueue(new Callback<List<User>>() {
            @Override
            public void onResponse(Call<List<User>> call, Response<List<User>> response)
            {
               List<User> users = response.body();

               textView.append(users.toString());
            }

            @Override
            public void onFailure(Call<List<User>> call, Throwable t)
            {
                Toast.makeText(MainActivity.this, "error", Toast.LENGTH_LONG).show();
            }
        });
        */

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    public void login(View view)
    {
       // String outcome;
        EditText username = (EditText) findViewById(R.id.login);
        EditText password = (EditText) findViewById(R.id.password);

        THIS WONT WORK IS THIS IS ASYNC - YOUR JUST TELLING THE USERMANAGER TO LOGIN()
        outcome = userManager.login(username.getText().toString(), password.getText().toString());

CHANGE TO THIS
loginCallback = new Callback()
{
    public boolean handleMessage(User user) {
        lOGINSUCCESS(user);
    }
};
        userManager.login(username.getText().toString(), password.getText().toString(),loginCallback);
        /*
        String API_BASE_URL = "http://10.0.2.2:5000/";
        OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

        Retrofit.Builder builder = new Retrofit.Builder()
                .baseUrl(API_BASE_URL)
                .addConverterFactory(GsonConverterFactory.create());

        Retrofit retrofit = builder.client(httpClient.build()).build();

        UserClient client = retrofit.create(UserClient.class);
        Call<User> call = client.getUserByName(username.getText().toString());

        call.enqueue(new Callback<User>() {
            @Override
            public void onResponse(Call<User> call, Response<User> response)
            {
                User user = response.body();

                textView.append(user.toString());
            }

            @Override
            public void onFailure(Call<User> call, Throwable t)
            {
                Toast.makeText(MainActivity.this, "error: " + t.getMessage(), Toast.LENGTH_LONG).show();
            }
        });
        */

    PUBLIC VOID lOGINSUCCESS()
{
Toast.makeText(MainActivity.this, "Logged in!", Toast.LENGTH_LONG).show();
}

PUBLIC VOID lOGINFAILED()
{
Toast.makeText(MainActivity.this, "FAILED!", Toast.LENGTH_LONG).show();
}


    }
}
RAW Paste Data

package com.example.dmust.restaurantapp;

import android.util.Log;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONObject;

import java.io.IOException;

import okhttp3.OkHttpClient;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;


public class UserManager
{
    User user = null;
    private ServiceCallback callback = new ServiceCallback() { //POSSIBLE FAILS AS ITS A SERVICECALLBACK AND NOT THE RETROFIT CALLBACK??- BUT REMOVE ANYWAYS
        @Override
        public Response successful(Response response)
        {
            if(response!=null)
            {
                Log.d("response.body", response.body().toString());
            }
            else
            {
                response = null;
            }
            return response;
        }

        @Override
        public void fail(Throwable t)
        {
            Log.d("failed",t.getMessage());
        }
    };

    public UserManager()
    {
    }

    public String login(String username, String password, Callback loginCallback)
    {
        String outcome;
        UserClient client = ServiceGenerator.createService(UserClient.class);
        Call<User> call = client.getUserByName(username);

        call.enqueue(
                new Callback<User>() {
            @Override
            public void onResponse(Call<User> call, Response<User> response)
            {
HERE IS WHERE THE RESPONSE IS , SO NOW YOU COULD PASS INFO TO A FUNCTION TO VALIDATE AND THEN FINALLY IF ALL IS GOOD DO SOMETHING LIKE
				loginCallback.handleMessage(user);
                //callback.successful(response);
            }

            @Override
            public void onFailure(Call<User> call, Throwable t)
            {
                Log.d("Error", "Error: " + t.getMessage());
HERE IS WHERE THE Fail IS , DO SOMETHING LIKE
getActivityMain().lOGINFAILED(user);

            }
        });
        return "success";

    }

}

package com.example.dmust.restaurantapp;

import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class ServiceGenerator
{
    private final static String API_BASE_URL = "http://10.0.2.2:5000/";
    private static OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

    private static Retrofit.Builder builder = new Retrofit.Builder()
            .baseUrl(API_BASE_URL)
            .addConverterFactory(GsonConverterFactory.create());

    private static Retrofit retrofit = builder.client(httpClient.build()).build();

    public static <S> S createService(Class<S> serviceClass)
    {
        return retrofit.create(serviceClass);
    }
}

package com.example.dmust.restaurantapp;

import retrofit2.Response;

public interface ServiceCallback
{
    Response successful(Response response);
    void fail(Throwable t);
}

package com.example.dmust.restaurantapp;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.JsonReader;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;

import okhttp3.OkHttpClient;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class MainActivity extends AppCompatActivity
{
    private TextView textView;
    private UserManager userManager;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        textView = (TextView) findViewById(R.id.textView);
        setSupportActionBar(toolbar);

        Spinner spinner = (Spinner) findViewById(R.id.spinner);
        // Create an ArrayAdapter using the string array and a default spinner layout
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
                        R.array.user_types, android.R.layout.simple_spinner_item);
        // Specify the layout to use when the list of choices appears
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        // Apply the adapter to the spinner
        spinner.setAdapter(adapter);

        userManager = new UserManager();

        /*
        String API_BASE_URL = "http://10.0.2.2:5000/";
        OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

        Retrofit.Builder builder = new Retrofit.Builder()
                .baseUrl(API_BASE_URL)
                .addConverterFactory(GsonConverterFactory.create());

        Retrofit retrofit = builder.client(httpClient.build()).build();

        UserClient client = retrofit.create(UserClient.class);
        Call<List<User>> call = client.allUsers();

        call.enqueue(new Callback<List<User>>() {
            @Override
            public void onResponse(Call<List<User>> call, Response<List<User>> response)
            {
               List<User> users = response.body();

               textView.append(users.toString());
            }

            @Override
            public void onFailure(Call<List<User>> call, Throwable t)
            {
                Toast.makeText(MainActivity.this, "error", Toast.LENGTH_LONG).show();
            }
        });
        */

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    public void login(View view)
    {
       // String outcome;
        EditText username = (EditText) findViewById(R.id.login);
        EditText password = (EditText) findViewById(R.id.password);

		THIS WONT WORK IS THIS IS ASYNC - YOUR JUST TELLING THE USERMANAGER TO LOGIN()
        outcome = userManager.login(username.getText().toString(), password.getText().toString());

CHANGE TO THIS
        userManager.login(username.getText().toString(), password.getText().toString());
        /*
        String API_BASE_URL = "http://10.0.2.2:5000/";
        OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

        Retrofit.Builder builder = new Retrofit.Builder()
                .baseUrl(API_BASE_URL)
                .addConverterFactory(GsonConverterFactory.create());

        Retrofit retrofit = builder.client(httpClient.build()).build();

        UserClient client = retrofit.create(UserClient.class);
        Call<User> call = client.getUserByName(username.getText().toString());

        call.enqueue(new Callback<User>() {
            @Override
            public void onResponse(Call<User> call, Response<User> response)
            {
                User user = response.body();

                textView.append(user.toString());
            }

            @Override
            public void onFailure(Call<User> call, Throwable t)
            {
                Toast.makeText(MainActivity.this, "error: " + t.getMessage(), Toast.LENGTH_LONG).show();
            }
        });
        */

	PUBLIC VOID lOGINSUCCESS()
{
Toast.makeText(MainActivity.this, "Logged in!", Toast.LENGTH_LONG).show();
}

PUBLIC VOID lOGINFAILED()
{
Toast.makeText(MainActivity.this, "FAILED!", Toast.LENGTH_LONG).show();
}


    }
}

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