[김은서_Android] 9주차 과제 제출

app/src/main/AndroidManifest.xml

@@ -2,6 +2,11 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission
+        android:name="android.permission.READ_EXTERNAL_STORAGE"
+        android:maxSdkVersion="32" />
+    <uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
@@ -12,6 +17,12 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.BCSD_Android_20251"
         tools:targetApi="31">
+        <activity
+            android:name=".Adapter"
+            android:exported="false" />
+        <activity
+            android:name=".Music"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">

app/src/main/java/com/example/bcsd_android_2025_1/Adapter.kt

@@ -0,0 +1,42 @@
+package com.example.bcsd_android_2025_1
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import android.widget.Toast
+import androidx.recyclerview.widget.RecyclerView
+
+class MusicAdapter(private val musicList: List<Music>) :
+    RecyclerView.Adapter<MusicAdapter.MusicViewHolder>() {
+
+    class MusicViewHolder(val view: View) : RecyclerView.ViewHolder(view) {
+        val titleText: TextView = view.findViewById(R.id.text_list_Title)
+        val artistText: TextView = view.findViewById(R.id.text_list_Artist)
+        val durationText: TextView = view.findViewById(R.id.text_list_time)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MusicViewHolder {
+        val view = LayoutInflater.from(parent.context)
+            .inflate(R.layout.music, parent, false)
+        return MusicViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: MusicViewHolder, position: Int) {
+        val music = musicList[position]
+        holder.titleText.text = music.title
+        holder.artistText.text = music.artist
+
+        val seconds = (music.duration / 1000) % 60
+        val minutes = (music.duration / (1000 * 60)) % 60
+        holder.durationText.text = String.format("%02d:%02d", minutes, seconds)
+
+        holder.view.setOnClickListener {
+            Toast.makeText(holder.view.context,  "재생: ${music.title}", Toast.LENGTH_SHORT).show()
+        }
+    }
+
+        override fun getItemCount(): Int = musicList.size
+}
+
+

app/src/main/java/com/example/bcsd_android_2025_1/MainActivity.kt

@@ -1,14 +1,109 @@
 package com.example.bcsd_android_2025_1
 
 import android.os.Bundle
-import androidx.activity.enableEdgeToEdge
+import android.Manifest
+import android.content.Intent
+import android.net.Uri
+import android.os.Build
+import android.provider.MediaStore
+import android.provider.Settings
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
-import androidx.core.view.ViewCompat
-import androidx.core.view.WindowInsetsCompat
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.LinearLayoutManager
 
 class MainActivity : AppCompatActivity() {
+    private lateinit var recyclerView: RecyclerView
+
+    private val requestPermission =
+        registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted ->
+            val permission = getAudioPermission()
+
+            if (isGranted) {
+                getAudioFile()
+            } else {
+                if (shouldShowRequestPermissionRationale(permission)) {
+                    showPermissionRationaleDialog()
+                } else {
+                    showSettingsDialog()
+                }
+            }
+        }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        recyclerView = findViewById(R.id.recyclerView)
+
+        requestPermission.launch(getAudioPermission())
+    }
+
+    private fun getAudioPermission(): String {
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            Manifest.permission.READ_MEDIA_AUDIO
+        } else {
+            Manifest.permission.READ_EXTERNAL_STORAGE
+        }
+    }
+
+    private fun showPermissionRationaleDialog() {
+        AlertDialog.Builder(this)
+            .setTitle(getString(R.string.permission_required))
+            .setMessage(getString(R.string.permission_required_music))
+            .setPositiveButton(getString(R.string.permission_request)) { _, _ ->
+                requestPermission.launch(getAudioPermission())
+            }
+            .setNegativeButton(getString(R.string.cancel), null)
+            .show()
+    }
+
+    private fun showSettingsDialog() {
+        AlertDialog.Builder(this)
+            .setTitle(getString(R.string.permission_denied))
+            .setMessage(getString(R.string.permission_setup_request))
+            .setPositiveButton(getString(R.string.permission_move_settings)) { _, _ ->
+                val intent = Intent(
+                    Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
+                    Uri.fromParts("package", packageName, null)
+                )
+                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                startActivity(intent)
+            }
+            .setNegativeButton(getString(R.string.cancel), null)
+            .show()
+    }
+
+    private fun getAudioFile() {
+        val musicList = mutableListOf<Music>()
+        val projection = arrayOf(
+            MediaStore.Audio.Media.TITLE,
+            MediaStore.Audio.Media.ARTIST,
+            MediaStore.Audio.Media.DURATION
+        )
+
+        val selection = "${MediaStore.Audio.Media.IS_MUSIC} != 0"
+
+        contentResolver.query(
+            MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
+            projection, selection, null,
+            MediaStore.Audio.Media.DEFAULT_SORT_ORDER
+        )?.use { cursor ->
+            val titleCol = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE)
+            val artistCol = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST)
+            val durationCol = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION)
+
+            while (cursor.moveToNext()) {
+                val title = cursor.getString(titleCol)
+                val artist = cursor.getString(artistCol)
+                val duration = cursor.getLong(durationCol)
+
+                musicList.add(Music(title, artist, duration))
+            }
+        }
+
+        recyclerView.layoutManager = LinearLayoutManager(this)
+        recyclerView.adapter = MusicAdapter(musicList)
     }
-}
+}

app/src/main/java/com/example/bcsd_android_2025_1/Music.kt

@@ -0,0 +1,7 @@
+package com.example.bcsd_android_2025_1
+
+data class Music(
+    val title: String,
+    val artist: String,
+    val duration: Long
+)

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

@@ -7,13 +7,9 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Hello Android!"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recyclerView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/music.xml

@@ -0,0 +1,48 @@
+<?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"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="12dp">
+
+    <TextView
+        android:id="@+id/text_list_Title"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:textStyle="bold"
+        android:textSize="15sp"
+        android:textColor="@color/black"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"/>
+
+    <TextView
+        android:id="@+id/text_list_Artist"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textColor="@color/black"
+        android:textSize="12sp"
+        app:layout_constraintTop_toBottomOf="@id/text_list_Title"
+        app:layout_constraintStart_toStartOf="parent" />
+
+    <TextView
+        android:id="@+id/text_list_time"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textColor="@color/black"
+        android:textSize="12sp"
+        app:layout_constraintTop_toBottomOf="@id/text_list_Title"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <View
+        android:id="@+id/text_list_line"
+        android:layout_width="0dp"
+        android:layout_height="1dp"
+        android:background="@color/gray"
+        app:layout_constraintTop_toBottomOf="@id/text_list_time"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        android:layout_marginTop="8sp"/>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values/colors.xml

@@ -2,4 +2,5 @@
 <resources>
     <color name="black">#FF000000</color>
     <color name="white">#FFFFFFFF</color>
+    <color name="gray">#BDBDBD</color>
 </resources>

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

@@ -1,3 +1,11 @@
 <resources>
     <string name="app_name">BCSD_Android_2025-1</string>
+    <string name="play">재생</string>
+    <string name="permission_required">권한 필요</string>
+    <string name="permission_required_music">음악을 가져오기 위해 권한이 필요합니다.</string>
+    <string name="permission_request">권한 요청</string>
+    <string name="cancel">취소</string>
+    <string name="permission_denied">권한이 거부됨.</string>
+    <string name="permission_setup_request">설정에서 권한을 직접 허용해주세요.</string>
+    <string name="permission_move_settings">설정으로 이동</string>
 </resources>