App  lib 추가 

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })

    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile 'com.android.volley:volley:1.0.0'
    testCompile 'junit:junit:4.12'
}

데이터 베이스 연결 부분

 compile 'com.android.volley:volley:1.0.0'

 

 

 

 

class LoginActivity 

package kr.co.dothome.braverokmc.managerment;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

//로그인 초기 화면
public class LoginActivity extends AppCompatActivity {

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

 

R.layout.login_main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="kr.co.dothome.braverokmc.managerment.LoginActivity">

    <EditText
        android:id="@+id/idTextText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:ems="10"
        android:hint="아이디"
        android:inputType="textPersonName" />

    <EditText
        android:id="@+id/text1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/idTextText"
        android:ems="10"
        android:hint="비밀번호"
        android:inputType="textPassword" />

    <Button
        android:id="@+id/loginButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/text1"
        android:layout_marginTop="86dp"
        android:text="로그인" />

    <TextView
        android:id="@+id/registerButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/loginButton"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="40dp"
        android:text="회원가입"
        android:textAppearance="@style/TextAppearance.AppCompat" />
</RelativeLayout>

 

 

 

class RegisterActivity

package kr.co.dothome.braverokmc.managerment;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class RegisterActivity extends AppCompatActivity {

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

 

R.layout.activity_register

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:tools="http://schemas.android.com/tools"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="kr.co.dothome.braverokmc.managerment.RegisterActivity">

    <EditText
        android:id="@+id/idTextText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:ems="10"
        android:hint="아이디"
        android:inputType="textPersonName" />

    <EditText
        android:id="@+id/pswordText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="비밀번호"
        android:inputType="textPassword" />

    <EditText
        android:id="@+id/nameText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="18dp"
        android:ems="10"
        android:hint="이름"
        android:inputType="textPersonName" />

    <EditText
        android:id="@+id/ageText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="나이"
        android:inputType="textPersonName" />

    <Button
        android:id="@+id/Registerbutton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_centerVertical="true"

        android:text="등록" />
</LinearLayout>

 

 

 

 

class MainActivity

package kr.co.dothome.braverokmc.managerment;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;


//로그인 성공시
public class MainActivity extends AppCompatActivity {

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

 

 

R.layout.activity_main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="kr.co.dothome.braverokmc.managerment.MainActivity">

    <TextView
        android:id="@+id/welcome"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView"
        android:textAppearance="@style/TextAppearance.AppCompat.Display1"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:id="@+id/idTextText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/welcome"
        android:text="아이디"
        android:textAppearance="@style/TextAppearance.AppCompat.Headline" />

    <TextView
        android:id="@+id/idText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView"
        android:textAppearance="@style/TextAppearance.AppCompat.Display1"
        android:layout_below="@+id/idTextText"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:id="@+id/pswordText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView"
        android:textAppearance="@style/TextAppearance.AppCompat.Display1"
        android:layout_below="@+id/text1"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:id="@+id/text1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/idText"
        android:text="비밀번호"
        android:textAppearance="@style/TextAppearance.AppCompat.Headline" />


</RelativeLayout>