package com.mdp.tugas;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private EditText edtUsername, edtPassword;
    private Data dataUser;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        dataUser = new Data();
        AddEventCheckBoxShowPwd();
        AddEventRegisterButton();
        AddEventLoginButton();
    }

    private void AddEventLoginButton() {
        Button btnLogin = (Button) findViewById(R.id.btnLogin);
        btnLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                edtUsername = findViewById(R.id.edtUsername);
                edtPassword = findViewById(R.id.edtPassword);
                String u = edtUsername.getText().toString().trim();
                String p = edtPassword.getText().toString().trim();
                if (dataUser.isValidLogin(u, p)) {
                    Intent i = new Intent(getApplicationContext(), HomeActivity.class);
                    i.putExtra("username", u);
                    Toast.makeText(getApplicationContext(), "Login berhasil", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(getApplicationContext(), "Username atau Password" +
                            "tidak terdaftar", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }

    private void AddEventRegisterButton() {
        Button btnRegister = (Button) findViewById(R.id.btnRegister);
        btnRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                edtUsername = (EditText) findViewById(R.id.edtUsername);
                edtPassword = (EditText) findViewById(R.id.edtPassword);
                if (!dataUser.cekUsername(edtUsername.getText().toString())) {
                    dataUser.addData(edtUsername.getText().toString(), edtPassword.getText().toString());
                    Toast.makeText(getApplicationContext(), "Register Berhasil", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(getApplicationContext(), "Username sudah terdaftar", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }

    private void AddEventCheckBoxShowPwd() {
        final CheckBox chkShowPwd = (CheckBox) findViewById(R.id.chkShowPwd);
        chkShowPwd.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (!isChecked) {
                    chkShowPwd.setChecked(false);
                    edtPassword.setInputType(EditorInfo.TYPE_CLASS_TEXT);
                } else {
                    chkShowPwd.setChecked(true);
                    edtPassword.setInputType(EditorInfo.TYPE_CLASS_TEXT |
                            EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
                }
            }
        });
    }
}
package com.mdp.tugas;

import java.util.ArrayList;

/**
 * Created by user on 4/3/18.
 */

public class Data {
        private ArrayList<String> username;
        private ArrayList<String> password;
        Data(){
            username = new ArrayList<>();
            password = new ArrayList<>();
        }
        public void addData(String u,String p){
            username.add(u);
            password.add(p);
        }
        public boolean isValidLogin(String u,String p){
            Boolean cek = false;
            for(int i=0;i<username.size();i++){
                if(username.get(i).equalsIgnoreCase(u) && password.get(i).equalsIgnoreCase(p)){
                    cek = true;
                }
            }
            return cek;
        }
        public boolean cekUsername(String u){
            Boolean cek = false;
            for(int i=0;i<username.size();i++){
                if(username.get(i).equalsIgnoreCase(u)){
                    cek = true;
                }
            }
            return cek;
        }
}