[김보성_Android] 9주차 과제 제출

app/build.gradle.kts

@@ -1,16 +1,17 @@
 plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.compose)
 }
 
 android {
     namespace = "com.example.bcsd_android_2025_1"
-    compileSdk = 34
+    compileSdk = 35
 
     defaultConfig {
         applicationId = "com.example.bcsd_android_2025_1"
         minSdk = 26
-        targetSdk = 34
+        targetSdk = 35
         versionCode = 1
         versionName = "1.0"
 
@@ -33,6 +34,9 @@ android {
     kotlinOptions {
         jvmTarget = "11"
     }
+    buildFeatures {
+        compose = true
+    }
 }
 
 dependencies {
@@ -42,7 +46,18 @@ dependencies {
     implementation(libs.material)
     implementation(libs.androidx.activity)
     implementation(libs.androidx.constraintlayout)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.ui)
+    implementation(libs.androidx.ui.graphics)
+    implementation(libs.androidx.ui.tooling.preview)
+    implementation(libs.androidx.material3)
     testImplementation(libs.junit)
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.ui.test.junit4)
+    debugImplementation(libs.androidx.ui.tooling)
+    debugImplementation(libs.androidx.ui.test.manifest)
 }

app/src/main/AndroidManifest.xml

@@ -2,6 +2,10 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
@@ -12,12 +16,13 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.BCSD_Android_20251"
         tools:targetApi="31">
+
+
         <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>

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

@@ -1,14 +1,155 @@
 package com.example.bcsd_android_2025_1
 
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.net.Uri
+import android.os.Build
 import android.os.Bundle
-import androidx.activity.enableEdgeToEdge
+import android.provider.MediaStore
+import android.view.View
+import android.widget.Button
+import android.widget.TextView
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
-import androidx.core.view.ViewCompat
-import androidx.core.view.WindowInsetsCompat
+import androidx.appcompat.app.AlertDialog
+import androidx.core.content.ContextCompat
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.example.bcsd_android_2025_1.model.MusicData
 
 class MainActivity : AppCompatActivity() {
+
+    private lateinit var recyclerView: RecyclerView
+    private lateinit var permissionMessage: TextView
+    private lateinit var openSettingsButton: Button
+    private lateinit var musicAdapter: MusicAdapter
+
+    private val musicList = mutableListOf<MusicData>()
+
+    private val requestPermissionLauncher = registerForActivityResult(
+        ActivityResultContracts.RequestPermission()
+    ) { isGranted ->
+        if (isGranted) {
+            showMusicList()
+        } else {
+            showPermissionDialog()
+        }
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        recyclerView = findViewById(R.id.MusicRecyclerView)
+        permissionMessage = findViewById(R.id.text1)
+        openSettingsButton = findViewById(R.id.OpenButton)
+
+        musicAdapter = MusicAdapter(musicList)
+        recyclerView.adapter = musicAdapter
+        recyclerView.layoutManager = LinearLayoutManager(this)
+
+        recyclerView.visibility = View.GONE
+        permissionMessage.visibility = View.GONE
+        openSettingsButton.visibility = View.GONE
+
+        if (hasPermission()) {
+            showMusicList()
+        } else {
+            requestPermission()
+        }
+
+        openSettingsButton.setOnClickListener {
+            val intent = Intent(android.provider.Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
+            val uri = Uri.fromParts("package", packageName, null)
+            intent.data = uri
+            startActivity(intent)
+        }
+    }
+
+    private fun hasPermission(): Boolean {
+        val permission = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            android.Manifest.permission.READ_MEDIA_AUDIO
+        } else {
+            android.Manifest.permission.READ_EXTERNAL_STORAGE
+        }
+        return ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED
+    }
+
+    private fun requestPermission() {
+        val permission = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            android.Manifest.permission.READ_MEDIA_AUDIO
+        } else {
+            android.Manifest.permission.READ_EXTERNAL_STORAGE
+        }
+
+        when {
+            ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED -> {
+                showMusicList()
+            }
+            shouldShowRequestPermissionRationale(permission) -> {
+                showPermissionDialog()
+            }
+            else -> {
+                requestPermissionLauncher.launch(permission)
+            }
+        }
+    }
+
+    private fun showPermissionDialog() {
+        AlertDialog.Builder(this)
+            .setTitle(getString(R.string.permission_dialog_title))
+            .setMessage(getString(R.string.permission_dialog_message))
+            .setPositiveButton(getString(R.string.ok)) { dialog, _ ->
+                dialog.dismiss()
+                showPermissionUI()
+            }
+            .setNegativeButton(getString(R.string.cancel)) { dialog, _ ->
+                dialog.dismiss()
+            }
+            .show()
+    }
+
+    private fun showPermissionUI() {
+        recyclerView.visibility = View.GONE
+        permissionMessage.visibility = View.VISIBLE
+        openSettingsButton.visibility = View.VISIBLE
+    }
+
+    private fun showMusicList() {
+        recyclerView.visibility = View.VISIBLE
+        permissionMessage.visibility = View.GONE
+        openSettingsButton.visibility = View.GONE
+
+        loadMusicList()
+    }
+
+    private fun loadMusicList() {
+        musicList.clear()
+
+        val uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
+        val projection = arrayOf(
+            MediaStore.Audio.Media.TITLE,
+            MediaStore.Audio.Media.ARTIST,
+            MediaStore.Audio.Media.DURATION
+        )
+
+        val cursor = contentResolver.query(uri, projection, null, null, null)
+        cursor?.use {
+            while (it.moveToNext()) {
+                val title = it.getString(0)
+                val artist = it.getString(1)
+                val duration = it.getLong(2)
+                musicList.add(MusicData(title, artist, duration))
+            }
+        }
+
+        musicAdapter.notifyDataSetChanged()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        if (hasPermission()) {
+            showMusicList()
+        }
     }
-}
+}

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

@@ -0,0 +1,39 @@
+package com.example.bcsd_android_2025_1
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import com.example.bcsd_android_2025_1.model.MusicData
+
+class MusicAdapter(private val musicList: List<MusicData>) :
+    RecyclerView.Adapter<MusicAdapter.MusicViewHolder>() {
+
+    inner class MusicViewHolder(view: View) : RecyclerView.ViewHolder(view) {
+        val title: TextView = view.findViewById(R.id.titleText)
+        val artist: TextView = view.findViewById(R.id.artistText)
+        val duration: TextView = view.findViewById(R.id.durationText)
+    }
+
+    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.title.text = music.title
+        holder.artist.text = music.artist
+        holder.duration.text = formatDuration(music.duration)
+    }
+
+    override fun getItemCount(): Int = musicList.size
+
+    private fun formatDuration(ms: Long): String {
+        val minutes = ms / 1000 / 60
+        val seconds = (ms / 1000) % 60
+        return "%d:%02d".format(minutes, seconds)
+    }
+}

app/src/main/java/com/example/bcsd_android_2025_1/model/MusicData.kt

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