11주차 과제 PR입니다.

newProject/app/build.gradle.kts → Assignment_10/app/build.gradle.kts

@@ -33,6 +33,9 @@ android {
     kotlinOptions {
         jvmTarget = "1.8"
     }
+    buildFeatures {
+        viewBinding = true
+    }
 }
 
 dependencies {

Assignment_10/app/src/main/java/com/example/assignment/LapAdapter.kt

@@ -0,0 +1,24 @@
+package com.example.assignment
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import com.example.assignment.databinding.ItemLapBinding
+
+class LapAdapter(private val lapTimes: MutableList<String>) : RecyclerView.Adapter<LapAdapter.ViewHolder>() {
+
+    class ViewHolder(binding: ItemLapBinding) : RecyclerView.ViewHolder(binding.root) {
+        val lapTimeTextView = binding.lapTimeTextView
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        val binding = ItemLapBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+        return ViewHolder(binding)
+    }
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        holder.lapTimeTextView.text = lapTimes[position]
+    }
+
+    override fun getItemCount() = lapTimes.size
+}

Assignment_10/app/src/main/java/com/example/assignment/MainActivity.kt

@@ -0,0 +1,94 @@
+package com.example.assignment
+
+import android.annotation.SuppressLint
+import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.os.SystemClock
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.example.assignment.databinding.ActivityMainBinding
+
+class MainActivity : AppCompatActivity() {
+    private lateinit var lapAdapter: LapAdapter
+    private val lapTimes = mutableListOf<String>()
+    private lateinit var binding: ActivityMainBinding
+
+    private lateinit var handler: Handler
+    private var isRunning = false
+    private var startTime = 0L
+    private var pausedTime = 0L
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        lapAdapter = LapAdapter(lapTimes)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.adapter = lapAdapter
+
+        handler = Handler(Looper.getMainLooper())
+
+        binding.startPauseButton.setOnClickListener { toggleTimer() }
+        binding.stopButton.setOnClickListener { stopTimer()}
+        binding.lapButton.setOnClickListener { recordLap() }
+    }
+
+    private val updateTimer = object : Runnable {
+        override fun run() {
+            val currentTime = SystemClock.elapsedRealtime()
+            pausedTime = currentTime - startTime
+            updateTimerText()
+            handler.postDelayed(this, 10)
+        }
+    }
+
+    private fun toggleTimer() {
+        val startPauseButton = binding.startPauseButton
+        if (!isRunning) {
+            startTime = SystemClock.elapsedRealtime() - pausedTime
+            handler.post(updateTimer)
+            startPauseButton.text = getString(R.string.pause)
+        } else {
+            handler.removeCallbacks(updateTimer)
+            startPauseButton.text = getString(R.string.start)
+        }
+        isRunning = !isRunning
+    }
+
+    @SuppressLint("NotifyDataSetChanged")
+    private fun stopTimer() {
+        handler.removeCallbacks(updateTimer)
+        pausedTime = 0L
+        isRunning = false
+        binding.startPauseButton.text = getString(R.string.start)
+        lapTimes.clear()
+        lapAdapter.notifyDataSetChanged()
+        updateTimerText()
+    }
+
+    private fun recordLap() {
+        if (isRunning) {
+            lapTimes.add(0, formatTime(pausedTime))
+            lapAdapter.notifyItemInserted(0)
+            binding.recyclerView.scrollToPosition(0)
+        }
+    }
+
+    private fun updateTimerText() {
+        binding.timerTextView.text = formatTime(pausedTime)
+    }
+
+    private fun formatTime(millis: Long): String {
+        val ms = (millis % 1000) / 10
+        val seconds = (millis / 1000) % 60
+        val minutes = (millis / (1000 * 60)) % 60
+        return "%02d : %02d : %02d".format(minutes, seconds, ms)
+    }
+
+    override fun onDestroy() {
+        handler.removeCallbacks(updateTimer)
+        super.onDestroy()
+    }
+}

Assignment_10/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,57 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:gravity="center"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/timer_textView"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/timer_text"
+            android:textSize="32sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp">
+
+            <Button
+                android:id="@+id/start_pause_button"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="@string/start"
+                android:layout_marginStart="10dp"
+                android:layout_marginEnd="10dp"/>
+
+            <Button
+                android:id="@+id/stop_button"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="@string/stop"
+                android:layout_marginEnd="10dp"/>
+
+            <Button
+                android:id="@+id/lap_button"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="@string/lap"
+                android:layout_marginEnd="10dp"/>
+        </LinearLayout>
+    </LinearLayout>
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recyclerView"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1" />
+</LinearLayout>

Assignment_10/app/src/main/res/layout/item_lap.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <TextView
+        android:id="@+id/lap_time_textView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="20sp"
+        android:padding="10dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

Assignment_10/app/src/main/res/values/strings.xml

@@ -0,0 +1,10 @@
+<resources>
+    <string name="app_name">assignment</string>
+
+    <!-- 타이머 텍스트 -->
+    <string name="timer_text">00 : 00 : 00</string>
+    <string name="start">Start</string>
+    <string name="pause">Pause</string>
+    <string name="stop">Stop</string>
+    <string name="lap">Lap</string>
+</resources>