경북대Android_정수현_1주차 과제

README.md

@@ -1 +1,47 @@
 # android-contacts
+
+## 📄 프로그램 설명
+
+연락처를 관리하는 안드로이드 앱입니다.
+
+간단하게 연락처를 추가하는 기능이 있습니다.
+
+## 🎯 1단계(연락처 추가) 구현할 기능
+
+- [X] 연락처와 이름, 전화번호를 입력 받는 레이아웃 제작
+
+    - [X] 전화번호는 숫자만 입력 가능하도록 구현한다.
+
+- [X] 더보기 버튼을 통해 생일, 성별, 메모를 입력 받는 레이아웃 제작
+
+    - [X] 버튼을 누르면 입력 폼이 확장되도록 구현한다.
+
+    - [X] 성별은 라디오 버튼을 통해 남성, 여성을 선택할 수 있도록 구현한다.
+
+- [X] 저장 버튼을 누르면 입력한 정보를 저장
+
+    - [X] 이름과 전화번호가 입력되지 않았을 때, 토스트 메시지를 띄워 경고한다.
+
+    - [X] 저장이 완료되면 '저장이 완료 되었습니다'라는 토스트 메시지를 띄워 저장되었음을 알린다.
+
+- [X] 취소 버튼을 누르면 입력한 정보를 초기화
+
+    - [X] '취소 되었습니다'라는 토스트 메시지를 띄워 초기화 되었음을 알린다.
+
+## 🎯 2단계(연락처 목록) 구현할 기능
+
+- [X] RecyclerView를 활용하여 연락처 목록을 보여주는 레이아웃 제작
+
+    - [X] 연락처의 목록을 구성하는 item 레이아웃 제작
+
+- [X] 연락처의 상세 정보를 확인하는 레이아웃 제작
+
+- [X] 연락처 목록에서 연락처를 클릭하면 상세 정보를 확인할 수 있도록 구현
+
+- [X] 추가하기 버튼 클릭 시 기존의 등록 페이지가 나타나는 기능 구현
+
+- [X] 등록 페이지에서 취소 버튼 클릭 시 목록으로 돌아가는 기능 구현
+
+- [X] 등록 페이지에서 저장 버튼 클릭 시 목록에 추가되는 기능 구현
+
+- [X] 뒤로가기 버튼 클릭 시 확인 팝업 띄우기

app/build.gradle.kts

@@ -41,7 +41,8 @@ dependencies {
     implementation("androidx.appcompat:appcompat:1.6.1")
     implementation("com.google.android.material:material:1.11.0")
     implementation("androidx.constraintlayout:constraintlayout:2.1.4")
-    testImplementation("junit:junit:4.13.2")
+	implementation("androidx.activity:activity:1.8.0")
+	testImplementation("junit:junit:4.13.2")
     androidTestImplementation("androidx.test.ext:junit:1.1.5")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
 }

app/src/main/AndroidManifest.xml

@@ -13,14 +13,23 @@
         android:theme="@style/Theme.Contacts"
         tools:targetApi="31">
         <activity
-            android:name=".MainActivity"
+            android:name=".ContactInfoActivity"
+            android:exported="true" />
+        <activity
+            android:name=".ContactsListActivity"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".ContactRegisterActivity"
+            android:exported="true" />
+        <activity
+            android:name=".MainActivity"
+            android:exported="true" />
     </application>
 
-</manifest>
+</manifest>

app/src/main/java/campus/tech/kakao/contacts/ContactData.kt

@@ -0,0 +1,12 @@
+package campus.tech.kakao.contacts
+
+import java.io.Serializable
+
+data class ContactData (
+	val name: String,
+	val phone: String,
+	var email: String? = null,
+	var birthday: String? = null,
+	var isFemale: Boolean? = null,
+	var memo: String? = null
+): Serializable

app/src/main/java/campus/tech/kakao/contacts/ContactInfoActivity.kt

@@ -0,0 +1,51 @@
+package campus.tech.kakao.contacts
+
+import android.os.Build
+import android.os.Bundle
+import android.view.View
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ContactInfoActivity : AppCompatActivity() {
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		setContentView(R.layout.activity_contact_info)
+
+		when (Build.VERSION.SDK_INT) {
+			in 33..Int.MAX_VALUE ->
+				intent.getSerializableExtra("contactData", ContactData::class.java)
+			else ->
+				intent.getSerializableExtra("contactData") as ContactData?
+		}?.let {
+			findViewById<TextView>(R.id.contactName).text = it.name
+			findViewById<TextView>(R.id.contactPhone).text = it.phone
+
+			it.email?.let { email ->
+				findViewById<LinearLayout>(R.id.contact_mail_layout).visibility = View.VISIBLE
+				findViewById<TextView>(R.id.contactMail).text = email
+			}
+
+			it.birthday?.let { birthday ->
+				findViewById<LinearLayout>(R.id.contact_birthday_layout).visibility = View.VISIBLE
+				findViewById<TextView>(R.id.contactBirthday).text = birthday
+			}
+
+			it.isFemale?.let { isFemale ->
+				findViewById<LinearLayout>(R.id.contact_Sex_layout).visibility = View.VISIBLE
+				findViewById<TextView>(R.id.contactSex).text = when (isFemale) {
+					true -> "여성"
+					false -> "남성"
+				}
+			}
+
+			it.memo?.let { memo ->
+				findViewById<LinearLayout>(R.id.contact_memo_layout).visibility = View.VISIBLE
+				findViewById<TextView>(R.id.contactMemo).text = memo
+			}
+		}
+	}
+}

app/src/main/java/campus/tech/kakao/contacts/ContactRegisterActivity.kt

@@ -0,0 +1,111 @@
+package campus.tech.kakao.contacts
+
+import android.content.Intent
+import android.os.Bundle
+import android.util.Log
+import android.view.View
+import android.widget.Button
+import android.widget.EditText
+import android.widget.LinearLayout
+import android.widget.RadioButton
+import android.widget.Toast
+import androidx.activity.OnBackPressedCallback
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ContactRegisterActivity : AppCompatActivity() {
+	private lateinit var nameInputView: EditText
+	private lateinit var phoneInputView: EditText
+	private lateinit var emailInputView: EditText
+	private lateinit var birthdayInputView: EditText
+	private lateinit var femaleRadioButton: RadioButton
+	private lateinit var maleRadioButton: RadioButton
+	private lateinit var memoInputView: EditText
+
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		setContentView(R.layout.activity_contact_register)
+
+		setMoreInfoVisibility()
+
+		nameInputView = findViewById(R.id.contactName)
+		phoneInputView = findViewById(R.id.contactPhone)
+		emailInputView = findViewById(R.id.contactMail)
+		birthdayInputView = findViewById(R.id.contactBirthday)
+		femaleRadioButton = findViewById(R.id.femaleRadioButton)
+		maleRadioButton = findViewById(R.id.maleRadioButton)
+		memoInputView = findViewById(R.id.contactMemo)
+
+		findViewById<Button>(R.id.cancelButton).setOnClickListener {
+			Toast.makeText(this@ContactRegisterActivity, "취소되었습니다.", Toast.LENGTH_SHORT).show()
+			finish()
+		}
+
+		findViewById<Button>(R.id.saveButton).setOnClickListener {
+			if (checkRequiredFields()) {
+				val intent = Intent()
+				intent.putExtra("contactData", saveContact())
+				setResult(RESULT_OK, intent)
+				Toast.makeText(this@ContactRegisterActivity, "저장되었습니다.", Toast.LENGTH_SHORT).show()
+				finish()
+			}
+		}
+
+		onBackPressedDispatcher.addCallback(backPressedCallback)
+	}
+
+	private val backPressedCallback = object : OnBackPressedCallback(true) {
+		override fun handleOnBackPressed() {
+			val dialogBuilder = AlertDialog.Builder(this@ContactRegisterActivity)
+			dialogBuilder.setMessage("작성중인 내용이 있습니다. 정말 나가시겠습니까?")
+			dialogBuilder.setNegativeButton("작성하기", null)
+			dialogBuilder.setPositiveButton("나가기") { dialog, which ->
+				Toast.makeText(this@ContactRegisterActivity, "취소되었습니다.", Toast.LENGTH_SHORT).show()
+				finish()
+			}
+			dialogBuilder.show()
+		}
+	}
+
+	private fun setMoreInfoVisibility() {
+		findViewById<LinearLayout>(R.id.moreInfoButton).setOnClickListener { moreInfoButton ->
+			findViewById<LinearLayout>(R.id.moreInfoLayout).visibility = View.VISIBLE
+			moreInfoButton.visibility = View.GONE
+		}
+	}
+
+	private fun checkRequiredFields(): Boolean {
+		return if (nameInputView.text.isEmpty())  {
+			Toast.makeText(this@ContactRegisterActivity, "이름은 필수 입력사항입니다.", Toast.LENGTH_SHORT).show()
+			false
+		} else if (phoneInputView.text.isEmpty()) {
+			Toast.makeText(this@ContactRegisterActivity, "전화번호는 필수 입력사항입니다.", Toast.LENGTH_SHORT).show()
+			false
+		} else true
+	}
+
+	private fun saveContact(): ContactData = ContactData(
+		name = nameInputView.text.toString(),
+		phone = phoneInputView.text.toString(),
+		email = when {
+			emailInputView.text.isEmpty() -> null
+			else -> emailInputView.text.toString()
+		},
+		birthday = when {
+			birthdayInputView.text.isEmpty() -> null
+			else -> birthdayInputView.text.toString()
+		},
+		isFemale = when {
+			femaleRadioButton.isChecked -> true
+			maleRadioButton.isChecked -> false
+			else -> null
+		},
+		memo = when {
+			memoInputView.text.isEmpty() -> null
+			else -> memoInputView.text.toString()
+		}
+	)
+}

app/src/main/java/campus/tech/kakao/contacts/ContactsListActivity.kt

@@ -0,0 +1,61 @@
+package campus.tech.kakao.contacts
+
+import android.content.Intent
+import android.os.Build
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.widget.TextView
+import androidx.activity.enableEdgeToEdge
+import androidx.activity.result.ActivityResultLauncher
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.LayoutManager
+import com.google.android.material.floatingactionbutton.FloatingActionButton
+
+class ContactsListActivity : AppCompatActivity() {
+	lateinit var contactsList: RecyclerView
+	lateinit var emptyInfoView: TextView
+	lateinit var addButton: FloatingActionButton
+
+	val contactsDataList = mutableListOf<ContactData>()
+
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		setContentView(R.layout.activity_contacts_list)
+
+		contactsList = findViewById(R.id.contacts_list_recyclerview)
+		emptyInfoView = findViewById(R.id.contact_list_empty_textview)
+		addButton = findViewById(R.id.contact_add_button)
+
+		contactsList.adapter = ContactsListAdapter(contactsDataList, LayoutInflater.from(this), this)
+		contactsList.layoutManager = LinearLayoutManager(this)
+
+		val startActivityLauncher: ActivityResultLauncher<Intent> =
+			registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+				when (result.resultCode) {
+					RESULT_OK -> {
+						val contactData = when (Build.VERSION.SDK_INT) {
+							in 33..Int.MAX_VALUE ->
+								result.data?.getSerializableExtra("contactData", ContactData::class.java)
+							else ->
+								result.data?.getSerializableExtra("contactData") as ContactData?
+						}?.let { data ->
+							contactsDataList.add(data)
+							contactsList.adapter?.notifyItemInserted(contactsDataList.size - 1)
+							emptyInfoView.visibility = View.GONE
+						}
+					}
+				}
+			}
+
+		addButton.setOnClickListener {
+			val intent = Intent(this, ContactRegisterActivity::class.java)
+			startActivityLauncher.launch(intent)
+		}
+	}
+}

app/src/main/java/campus/tech/kakao/contacts/ContactsListAdapter.kt

@@ -0,0 +1,41 @@
+package campus.tech.kakao.contacts
+
+import android.content.Context
+import android.content.Intent
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+
+class ContactsListAdapter(
+	val contactsList: MutableList<ContactData>,
+	val inflater: LayoutInflater,
+	val context: Context
+): RecyclerView.Adapter<ContactsListAdapter.MyViewHolder>() {
+
+	inner class MyViewHolder(itemView: View): RecyclerView.ViewHolder(itemView) {
+		val thumbnail: TextView = itemView.findViewById(R.id.contact_item_thumbnail)
+		val name: TextView = itemView.findViewById(R.id.contact_item_name)
+
+		init {
+			itemView.setOnClickListener {
+				val intent = Intent(context, ContactInfoActivity::class.java)
+				intent.putExtra("contactData", contactsList[adapterPosition])
+				context.startActivity(intent)
+			}
+		}
+	}
+
+	override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
+		val view = inflater.inflate(R.layout.item_contact, parent, false)
+		return MyViewHolder(view)
+	}
+
+	override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
+		holder.thumbnail.text = contactsList[position].name[0].toString()
+		holder.name.text = contactsList[position].name
+	}
+
+	override fun getItemCount(): Int = contactsList.size
+}

app/src/main/res/drawable/backgound_input_form.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+
+    <solid android:color="#DCF2F5" />
+    <corners android:radius="10dp" />
+    <padding
+        android:left="10dp"
+        android:right="10dp"
+        android:top="10dp"
+        android:bottom="10dp" />
+
+</shape>

app/src/main/res/drawable/background_circle.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+
+    <gradient
+        android:startColor="#EAD4AD"
+        android:endColor="#FFA400"
+        android:type="linear"
+        android:angle="315" />
+
+</shape>