#1 [FEAT] : SEMINAR_1

Author: hansh0101

.gitignore

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+# Created by https://www.toptal.com/developers/gitignore/api/android,androidstudio,kotlin,macos
+# Edit at https://www.toptal.com/developers/gitignore?templates=android,androidstudio,kotlin,macos
+
+### Android ###
+# Built application files
+*.apk
+*.aar
+*.ap_
+*.aab
+
+# Files for the ART/Dalvik VM
+*.dex
+
+# Java class files
+*.class
+
+# Generated files
+bin/
+gen/
+out/
+#  Uncomment the following line in case you need and you don't have the release build type files in your app
+# release/
+
+# Gradle files
+.gradle/
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Proguard folder generated by Eclipse
+proguard/
+
+# Log Files
+*.log
+
+# Android Studio Navigation editor temp files
+.navigation/
+
+# Android Studio captures folder
+captures/
+
+# IntelliJ
+*.iml
+.idea/workspace.xml
+.idea/tasks.xml
+.idea/gradle.xml
+.idea/assetWizardSettings.xml
+.idea/dictionaries
+.idea/libraries
+.idea/jarRepositories.xml
+# Android Studio 3 in .gitignore file.
+.idea/caches
+.idea/modules.xml
+# Comment next line if keeping position of elements in Navigation Editor is relevant for you
+.idea/navEditor.xml
+
+# Keystore files
+# Uncomment the following lines if you do not want to check your keystore files in.
+#*.jks
+#*.keystore
+
+# External native build folder generated in Android Studio 2.2 and later
+.externalNativeBuild
+.cxx/
+
+# Google Services (e.g. APIs or Firebase)
+# google-services.json
+
+# Freeline
+freeline.py
+freeline/
+freeline_project_description.json
+
+# fastlane
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots
+fastlane/test_output
+fastlane/readme.md
+
+# Version control
+vcs.xml
+
+# lint
+lint/intermediates/
+lint/generated/
+lint/outputs/
+lint/tmp/
+# lint/reports/
+
+# Android Profiling
+*.hprof
+
+### Android Patch ###
+gen-external-apklibs
+output.json
+
+# Replacement of .externalNativeBuild directories introduced
+# with Android Studio 3.5.
+
+### Kotlin ###
+# Compiled class file
+
+# Log file
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### AndroidStudio ###
+# Covers files to be ignored for android development using Android Studio.
+
+# Built application files
+
+# Files for the ART/Dalvik VM
+
+# Java class files
+
+# Generated files
+
+# Gradle files
+.gradle
+
+# Signing files
+.signing/
+
+# Local configuration file (sdk path, etc)
+
+# Proguard folder generated by Eclipse
+
+# Log Files
+
+# Android Studio
+/*/build/
+/*/local.properties
+/*/out
+/*/*/build
+/*/*/production
+*.ipr
+*~
+*.swp
+
+# Keystore files
+*.jks
+*.keystore
+
+# Google Services (e.g. APIs or Firebase)
+# google-services.json
+
+# Android Patch
+
+# External native build folder generated in Android Studio 2.2 and later
+
+# NDK
+obj/
+
+# IntelliJ IDEA
+*.iws
+/out/
+
+# User-specific configurations
+.idea/caches/
+.idea/libraries/
+.idea/shelf/
+.idea/.name
+.idea/compiler.xml
+.idea/copyright/profiles_settings.xml
+.idea/encodings.xml
+.idea/misc.xml
+.idea/scopes/scope_settings.xml
+.idea/vcs.xml
+.idea/jsLibraryMappings.xml
+.idea/datasources.xml
+.idea/dataSources.ids
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+
+# OS-specific files
+.DS_Store?
+ehthumbs.db
+Thumbs.db
+
+# Legacy Eclipse project files
+.classpath
+.project
+.cproject
+.settings/
+
+# Mobile Tools for Java (J2ME)
+
+# Package Files #
+
+# virtual machine crash logs (Reference: http://www.java.com/en/download/help/error_hotspot.xml)
+
+## Plugin-specific files:
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Mongo Explorer plugin
+.idea/mongoSettings.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+### AndroidStudio Patch ###
+
+!/gradle/wrapper/gradle-wrapper.jar
+
+# End of https://www.toptal.com/developers/gitignore/api/android,androidstudio,kotlin,macos

.idea/.gitignore

@@ -1,3 +1,99 @@
 # Android-Seunghyeon
 
 ![github_한승현_ver1-7](https://user-images.githubusercontent.com/70698151/135753583-cb6d8b51-421f-48e2-9284-0bb3b70bb6d7.png)
+
+#### 1차 세미나 과제
+
+<hr>
+
+#### 필수과제
+
+* **GIF**
+
+  <img src="https://user-images.githubusercontent.com/81508084/136231628-7ac1b492-31db-4810-bce0-e6e518165e19.gif" width="30%" height="30%"/>
+
+
+* **SignInActivity**
+
+  * 로그인 버튼을 눌렀을 때, ID, PW가 모두 입력되어있을 시 HomeActivity로 이동하고 그렇지 않으면 Toast 출력
+
+    ```kotlin
+        private fun clickLogin() {
+            if(!binding.etSigninId.text.isNullOrBlank() && !binding.etSigninPw.text.isNullOrBlank()) {
+                Toast.makeText(this, "안녕하세요 ${binding.etSigninId.text}!", Toast.LENGTH_SHORT).show()
+                val intent = Intent(this, HomeActivity::class.java)
+                startActivity(intent)
+            } else {
+                Toast.makeText(this, "ID/PW를 확인해주세요!", Toast.LENGTH_SHORT).show()
+            }
+        }
+    ```
+
+    * ID, PW 입력 여부는 isNullOrBlank() 메서드를 활용하여 체크하였음
+    * 각 조건문 분기마다 Toast 출력하였음
+
+  * 비밀번호 EditText는 입력 내용이 가려져 있어야하고, 모든 EditText는 미리보기가 있어야 함
+
+    ```xml
+            <EditText
+                android:id="@+id/et_signin_pw"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:hint="@string/signin_hint_pw"
+                android:inputType="textPassword"
+                android:maxLines="1"
+                android:ellipsize="end"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@id/tv_signin_pw" />
+    ```
+
+    * 모든 EditText마다 hint 속성을 활용하여 미리보기를 추가하였고, 비밀번호 EditText의 경우 inputType을 textPassword로 설정하여 입력 내용을 가렸음
+
+  * 회원가입 버튼을 누를 시 SignUpActivity로 이동
+
+    ```kotlin
+        private fun clickSignUp() {
+            val intent = Intent(this, SignUpActivity::class.java)
+            startActivity(intent)
+        }
+    ```
+
+* **SignUpActivity**
+
+  * 회원가입 버튼을 눌렀을 때, 이름, ID, PW가 모두 입력되어있을 시 SignInActivity로 다시 돌아가고 그렇지 않으면 Toast 출력
+
+    ```kotlin
+        private fun clickSignUp() {
+            if(!binding.etSignupName.text.isNullOrBlank() && !binding.etSignupId.text.isNullOrBlank() && !binding.etSignupPw.text.isNullOrBlank()) {
+                Toast.makeText(this, "회원가입이 완료되었습니다.", Toast.LENGTH_SHORT).show()
+                finish()
+            } else {
+                Toast.makeText(this, "이름/ID/PW를 확인해주세요.", Toast.LENGTH_SHORT).show()
+            }
+        }
+    ```
+
+    * 이름, ID, PW 입력 여부는 isNullOrBlank() 메서드를 활용하여 체크하였음
+    * 각 조건문 분기마다 Toast 출력하였음
+    * finish() 메서드를 활용하여 이전 스택의 Activity로 복귀하였음
+
+  * 비밀번호 EditText는 입력 내용이 가려져 있어야하고, 모든 EditText는 미리보기가 있어야 함
+
+    ```xml
+            <EditText
+                android:id="@+id/et_signup_pw"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:ellipsize="end"
+                android:hint="@string/signin_hint_pw"
+                android:inputType="textPassword"
+                android:maxLines="1"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@id/tv_signup_pw" />
+    ```
+
+    * 모든 EditText마다 hint 속성을 활용하여 미리보기를 추가하였고, 비밀번호 EditText의 경우 inputType을 textPassword로 설정하여 입력 내용을 가렸음

.idea/deploymentTargetDropDown.xml

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+/build