LoginActivity

package com.example.artur.timeger;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.example.artur.timeger.helper.DatabaseHelper;
import com.example.artur.timeger.model.User;

import java.util.List;

public class LoginActivity extends AppCompatActivity {

    private TextView forgetPassword;
    private Button passwordReset,loginButton,registerButton;
    private EditText loginText, passText, emailText;
    private boolean openPasswordReminder = false;

    private DatabaseHelper db;

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

        forgetPassword = (TextView)findViewById(R.id.forgetPassword);
        loginButton = (Button) findViewById(R.id.logLoginClick);
        registerButton = (Button) findViewById(R.id.logRegisterClick);
        loginText = (EditText) findViewById(R.id.login);
        passText = (EditText) findViewById(R.id.pass);




        //Password reminder operation - Artur
        forgetPassword.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if (!openPasswordReminder)
                {
                    passwordReset.setVisibility(View.VISIBLE);
                    openPasswordReminder = true;
                }
                else
                {
                    passwordReset.setVisibility(View.INVISIBLE);
                    openPasswordReminder = false;
                }
            }
        });

        //login operation - Jakub
        loginButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if(loginText.getText().length() != 0 && passText.getText().length() != 0)
                {
                    db = new DatabaseHelper(getApplicationContext());
                    List<User> users = db.getAllUsers();

                    int counter = 0;
                    for (User user : users)
                    {
                        Log.e("db", user.getLogin());
                        Log.e("app", loginText.getText().toString());
                        if(user.getLogin().equals(loginText.getText().toString()))
                        {

                            if (user.getPass().equals(passText.getText().toString()))
                            {
                                Toast.makeText(LoginActivity.this, "Zalogowano!", Toast.LENGTH_SHORT).show();
                                Intent succedLogin = new Intent(LoginActivity.this,MainActivity.class);
                                succedLogin.putExtra("user data", user.getId());
                                startActivity(succedLogin);
                            }
                            else
                            {
                                Toast.makeText(LoginActivity.this, "Błędne hasło!", Toast.LENGTH_SHORT).show();
                                return;
                            }
                        }
                        counter++;
                    }
                    Log.e("else", "?");
                    Toast.makeText(LoginActivity.this, "Błędny login!", Toast.LENGTH_SHORT).show();
                }
                else
                {
                    if(loginText.getText().length() == 0)
                    {
                        Toast.makeText(LoginActivity.this, "Wprowadź login!", Toast.LENGTH_SHORT);
                    }
                    else if(passText.getText().length() == 0)
                    {
                        Toast.makeText(LoginActivity.this, "Wprowadź hasło!", Toast.LENGTH_SHORT);
                    }
                }

            }
        });

        //go register operation
        registerButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent goRegister = new Intent(LoginActivity.this,RegisterActivity.class);
                startActivity(goRegister);
            }
        });
    }

}