안드로이드(Android) - 로그인, 회원가입 :: 안드로이드 설치 및 개발[SSISO Community]
 
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안드로이드 설치 및 개발
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등록일:2018-07-15 08:21:54 (0%)
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제목:안드로이드(Android) - 로그인, 회원가입


버전 확인

minSdkVersion, targetSdkVersion



Main 레이아웃 설정

이메일, 패스워드, 작은 버튼 2개 만들기

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<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:gravity="center"
    tools:context="com.ktds.cocomo.myapp.MainActivity">
 
    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textEmailAddress"
        android:ems="10"
        android:id="@+id/etEmail"
        android:hint="Email"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
 
    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:hint="Password"
        android:ems="10"
        android:id="@+id/etPassword"
        android:layout_below="@+id/etEmail"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="33dp" />
 
    <Button
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="회원가입"
        android:id="@+id/btnRegist"
        android:layout_below="@+id/etPassword"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="26dp" />
 
    <Button
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="로그인"
        android:id="@+id/btnLogin"
        android:layout_alignBottom="@+id/btnRegist"
        android:layout_toRightOf="@+id/btnRegist"
        android:layout_toEndOf="@+id/btnRegist" />
 
</RelativeLayout>



회원가입 화면

RegistActivity 추가

회원가입 화면 만들기

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:gravity="center"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.ktds.cocomo.myapp.RegistActivity">
 
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textEmailAddress"
        android:ems="10"
        android:hint="Email"
        android:id="@+id/etEmail" />
 
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:ems="10"
        android:hint="Password"
        android:id="@+id/etPassword" />
 
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:ems="10"
        android:hint="Password"
        android:id="@+id/etPasswordConfirm" />
 
    <LinearLayout
        android:orientation="horizontal"
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
 
        <Button
            android:id="@+id/btnDone"
            android:text="가입"
            android:layout_weight="1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
 
        <Button
            android:id="@+id/btnCancel"
            android:text="취소"
            android:layout_weight="1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
 
    </LinearLayout>
 
</LinearLayout>



메인에서 회원가입 버튼 눌렀을 때의 이벤트

startActivityForResult 이용

1000은 요청에 대한 식별자

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public class MainActivity extends AppCompatActivity {
 
    private Button btnRegist;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        btnRegist = (Button) findViewById(R.id.btnRegist);
        btnRegist.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getApplicationContext(), RegistActivity.class);
                startActivityForResult(intent, 1000);
            }
        });
    }
}



회원가입 눌렀을 때 RegistActivity에서 처리

이메일, 패스워드 입력하고 확인 누르면 RegistActivity 사라지면서 MainActivity로 이메일을 보내고

MainActivity에서는 이메일을 받아서 Email 입력 칸에 데이터를 넣는다.

취소를 누르면 그냥 MainActivity로 이동한다.

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package com.ktds.cocomo.myapp;
 
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
 
public class RegistActivity extends AppCompatActivity {
 
    private EditText etEmail;
    private EditText etPassword;
    private EditText etPasswordConfirm;
    private Button btnDone;
    private Button btnCancel;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_regist);
 
        etEmail = (EditText) findViewById(R.id.etEmail);
        etPassword = (EditText) findViewById(R.id.etPassword);
        etPasswordConfirm = (EditText) findViewById(R.id.etPasswordConfirm);
        btnDone = (Button) findViewById(R.id.btnDone);
        btnCancel = (Button) findViewById(R.id.btnCancel);
 
        // 비밀번호 일치 검사
        etPasswordConfirm.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
 
            }
 
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                String password = etPassword.getText().toString();
                String confirm = etPasswordConfirm.getText().toString();
 
                if( password.equals(confirm) ) {
                    etPassword.setBackgroundColor(Color.GREEN);
                    etPasswordConfirm.setBackgroundColor(Color.GREEN);
                } else {
                    etPassword.setBackgroundColor(Color.RED);
                    etPasswordConfirm.setBackgroundColor(Color.RED);
                }
            }
 
            @Override
            public void afterTextChanged(Editable s) {
 
            }
        });
 
        btnDone.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
 
                // 이메일 입력 확인
                if( etEmail.getText().toString().length() == 0 ) {
                    Toast.makeText(RegistActivity.this, "Email을 입력하세요!", Toast.LENGTH_SHORT).show();
                    etEmail.requestFocus();
                    return;
                }
 
                // 비밀번호 입력 확인
                if( etPassword.getText().toString().length() == 0 ) {
                    Toast.makeText(RegistActivity.this, "비밀번호를 입력하세요!", Toast.LENGTH_SHORT).show();
                    etPassword.requestFocus();
                    return;
                }
 
                // 비밀번호 확인 입력 확인
                if( etPasswordConfirm.getText().toString().length() == 0 ) {
                    Toast.makeText(RegistActivity.this, "비밀번호 확인을 입력하세요!", Toast.LENGTH_SHORT).show();
                    etPasswordConfirm.requestFocus();
                    return;
                }
 
                // 비밀번호 일치 확인
                if( !etPassword.getText().toString().equals(etPasswordConfirm.getText().toString()) ) {
                    Toast.makeText(RegistActivity.this, "비밀번호가 일치하지 않습니다!", Toast.LENGTH_SHORT).show();
                    etPassword.setText("");
                    etPasswordConfirm.setText("");
                    etPassword.requestFocus();
                    return;
                }
 
                Intent result = new Intent();
                result.putExtra("email", etEmail.getText().toString());
 
                // 자신을 호출한 Activity로 데이터를 보낸다.
                setResult(RESULT_OK, result);
                finish();
            }
        });
 
        btnCancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
 
    }
}



MainActivity에서 데이터 받기

Regist에서 보낸 데이터를 받는다.

Regist에서 입력한 이메일을 Email창에 입력한다.

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public class MainActivity extends AppCompatActivity {
 
    private EditText etEmail;
    private Button btnRegist;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        etEmail = (EditText) findViewById(R.id.etEmail);
        btnRegist = (Button) findViewById(R.id.btnRegist);
        btnRegist.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getApplicationContext(), RegistActivity.class);
 
                // SINGLE_TOP : 이미 만들어진게 있으면 그걸 쓰고, 없으면 만들어서 써라
                intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
 
                // 동시에 사용 가능
                // intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
 
                // intent를 보내면서 다음 액티비티로부터 데이터를 받기 위해 식별번호(1000)을 준다.
                startActivityForResult(intent, 1000);
            }
        });
    }
 
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
 
        // setResult를 통해 받아온 요청번호, 상태, 데이터
        Log.d("RESULT", requestCode + "");
        Log.d("RESULT", resultCode + "");
        Log.d("RESULT", data + "");
 
        if(requestCode == 1000 && resultCode == RESULT_OK) {
            Toast.makeText(MainActivity.this, "회원가입을 완료했습니다!", Toast.LENGTH_SHORT).show();
            etEmail.setText(data.getStringExtra("email"));
        }
    }
}



회원가입창에서 데이터를 입력한 뒤 가입 버튼을 누릅니다.


첫 번째 액티비티로 데이터를 가지고 이동한 것을 확인하실 수 있습니다.



출처: http://cocomo.tistory.com/387 [Cocomo Coding]
[본문링크] 안드로이드(Android) - 로그인, 회원가입
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