UITest1 : 로그인 화면 Activity(xml+java) / Toast, Snackbar

 

 

 

 

app / mainfests / AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.UITest1"
        tools:targetApi="30">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

 

 

 

 

app / java / com.bpdev.uitest1 / MainActivity.java

package com.bpdev.uitest1;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.google.android.material.snackbar.Snackbar;

public class MainActivity extends AppCompatActivity {

    TextView txtTitle;
    EditText editNames;
    EditText editPassword;
    EditText editEmail;
    Button btnSave;


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

        txtTitle = findViewById(R.id.textView);
        editNames = findViewById(R.id.editNames);
        editPassword = findViewById(R.id.editPassword);
        editEmail = findViewById(R.id.editEmail);
        btnSave = findViewById(R.id.btnSave);


        btnSave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // 1. 유저가 입력한 이름을 가져온다.
                String name = editNames.getText().toString().trim();
                Log.i("UITest1 MAIN", name );
                // 2. 유저가 입력한 비밀번호 가져온다.
                String password = editPassword.getText().toString().trim();
                Log.i("UITest1 MAIN", password );
                // 3. 유저가 입력한 이메일 가져온다.
                String email = editEmail.getText().toString().trim();
                Log.i("UITest1 MAIN", email );

                // 4. 데이터가 없을 경우 유저에게 알려줘야 한다. Toast
                if ( name.isEmpty() || password.isEmpty() || email.isEmpty() ) {
//                  Toast.makeText(MainActivity.this, "필수 항목을 모두 입력해 주세요.", Toast.LENGTH_SHORT).show();
                    Snackbar.make(btnSave, "필수 항목 모두 입력해주세요!", Snackbar.LENGTH_LONG).show();
                    return;
                }
                // 정상이니까, 네트워크로 데이터를 보내준다!
            }
        });



    }
}

 

 

 

 

 

app / res / layout / activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="60dp"
        android:layout_marginEnd="8dp"
        android:background="#2196F3"
        android:gravity="bottom|center"
        android:padding="30dp"
        android:shadowColor="#3F51B5"
        android:text="안녕하세요"
        android:textColor="#FFFFFF"
        android:textSize="34sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.497"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        />

    <EditText
        android:id="@+id/editNames"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="60dp"
        android:layout_marginTop="224dp"
        android:layout_marginEnd="60dp"
        android:ems="10"
        android:hint="이름 입력"
        android:inputType="text"
        android:textSize="24sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:privateImeOptions="defaultInputMode=korean"
        />

    <EditText
        android:id="@+id/editPassword"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="60dp"
        android:layout_marginTop="300dp"
        android:layout_marginEnd="60dp"
        android:ems="10"
        android:hint="비밀번호 입력"
        android:inputType="textPassword"
        android:textSize="24sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/editEmail"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="60dp"
        android:layout_marginTop="376dp"
        android:layout_marginEnd="60dp"
        android:ems="10"
        android:hint="e-mail 주소 입력"
        android:inputType="textEmailAddress"
        android:textSize="24sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:privateImeOptions="defaultInputMode=english"
    />

    <Button
        android:id="@+id/btnSave"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="60dp"
        android:layout_marginTop="29dp"
        android:layout_marginEnd="60dp"
        android:text="Button"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editEmail" />
</androidx.constraintlayout.widget.ConstraintLayout>

 

미리보기 화면

 

 

 

 

 

app / Gradle Scripts / build.gradle (module :app)

plugins {
    id 'com.android.application'
}

android {
    namespace 'com.bpdev.uitest1'
    compileSdk 33

    defaultConfig {
        applicationId "com.bpdev.uitest1"
        minSdk 24
        targetSdk 33
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.6.1'
    implementation 'com.google.android.material:material:1.9.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
}