LoginFragment.java

package com.betaseries.betaseries.ui.login;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.Toast;

import com.betaseries.betaseries.BuildConfig;
import com.betaseries.betaseries.R;
import com.betaseries.betaseries.ui.AbstractFragment;
import com.betaseries.betaseries.ui.MainActivity;

import butterknife.Bind;
import butterknife.ButterKnife;
import butterknife.OnClick;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;

/**
 * Created by florentchampigny on 24/08/15.
 */
public class LoginFragment extends AbstractFragment {

    public static AbstractFragment newInstance() {
        return new LoginFragment();
    }

    @Bind(R.id.userName)
    EditText userName;
    @Bind(R.id.password)
    EditText password;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_login_3, container, false);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        ButterKnife.bind(this, view);

        if (!BuildConfig.BETASERIES_USER.isEmpty() && !BuildConfig.BETASERIES_PASSWORD.isEmpty()) {
            userName.setText(BuildConfig.BETASERIES_USER);
            password.setText(BuildConfig.BETASERIES_PASSWORD);
        }

    }

    @OnClick(R.id.login)
    public void onLoginClicked() {
        String user = userName.getText().toString();
        String pass = password.getText().toString();

        if (user.isEmpty())
            Toast.makeText(getActivity(), "user.isEmpty()", Toast.LENGTH_SHORT).show();
        else if (pass.isEmpty())
            Toast.makeText(getActivity(), "pass.isEmpty()", Toast.LENGTH_SHORT).show();
        else
            authenticationManager.authentifier(user, pass)
                    .subscribeOn(Schedulers.io())
                    .observeOn(AndroidSchedulers.mainThread())
                    .onErrorReturn(throwable -> {
                        Toast.makeText(getActivity(), "Authentication error", Toast.LENGTH_SHORT).show();
                        return null;
                    })
                    .subscribe(authentification -> {
                        if (getActivity() != null) {
                            startActivity(new Intent(getActivity(), MainActivity.class));
                            getActivity().finish();
                        }
                    });
    }
}