[김영수_Android] 10주차 과제 제출

app/build.gradle.kts

@@ -36,7 +36,7 @@ android {
 }
 
 dependencies {
-
+    implementation(libs.androidx.lifecycle.viewmodel.ktx)
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.appcompat)
     implementation(libs.material)

app/src/main/AndroidManifest.xml

@@ -2,6 +2,15 @@
 <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" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK"/>
+
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
@@ -12,6 +21,12 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.BCSD_Android_20251"
         tools:targetApi="31">
+
+        <service
+            android:name=".AudioPlayer"
+            android:exported="false"
+            android:foregroundServiceType="mediaPlayback"/>
+
         <activity
             android:name=".MainActivity"
             android:exported="true">
@@ -23,4 +38,5 @@
         </activity>
     </application>
 
+
 </manifest>

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

@@ -0,0 +1,64 @@
+package com.example.bcsd_android_2025_1
+
+import android.content.Intent
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.core.content.ContextCompat
+import androidx.recyclerview.widget.RecyclerView
+
+class AudioAdapter : RecyclerView.Adapter<AudioAdapter.AudioViewHolder>(){
+
+
+    private val items = mutableListOf<MainActivity.AudioItem>()
+
+    fun submitList(newList: List<MainActivity.AudioItem>) {
+        items.clear()
+        items.addAll(newList)
+        notifyDataSetChanged()
+    }
+
+    inner class AudioViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+        val titleTextView: TextView = itemView.findViewById(R.id.tv_item_title)
+        val artistTextView: TextView = itemView.findViewById(R.id.tv_item_artist)
+        val timeTextView: TextView = itemView.findViewById(R.id.tv_item_time)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AudioViewHolder {
+        val view = LayoutInflater.from(parent.context)
+            .inflate(R.layout.item, parent, false)
+        return AudioViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: AudioViewHolder, position: Int) {
+        val item = items[position]
+        holder.titleTextView.text = item.name
+        holder.artistTextView.text = item.artist
+
+        val totalTime = item.duration/1000
+        val hours = totalTime/3600
+        val minutes = (totalTime%3600)/60
+        val seconds = totalTime%60
+        if (hours > 0){
+            holder.timeTextView.text = String.format("%d:%02d:%02d", hours, minutes, seconds)
+        } else {
+            holder.timeTextView.text = String.format("%d:%02d", minutes, seconds)
+        }
+
+        holder.itemView.setOnClickListener {
+            val context = holder.itemView.context
+            val intent = Intent(context, AudioPlayer::class.java).apply{
+                putExtra("AUDIO_URI",item.uri)
+                putExtra("AUDIO_TITLE",item.name)
+            }
+            ContextCompat.startForegroundService(context, intent)
+        }
+
+    }
+
+    override fun getItemCount(): Int = items.size
+
+
+
+}

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

@@ -0,0 +1,62 @@
+package com.example.bcsd_android_2025_1
+
+import android.app.Application
+import android.content.ContentUris
+import android.provider.MediaStore.Audio.Media
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+
+
+class AudioListManager(application: Application) : AndroidViewModel(application) {
+    private val audioListIn = MutableLiveData<List<MainActivity.AudioItem>>()
+    val audioListObserve: LiveData<List<MainActivity.AudioItem>> get() = audioListIn
+
+    fun loadAudioFiles() {
+        viewModelScope.launch(Dispatchers.IO) {
+            val list = mutableListOf<MainActivity.AudioItem>()
+            val resolver = getApplication<Application>().contentResolver
+
+            val projection = arrayOf(
+                Media._ID,
+                Media.DISPLAY_NAME,
+                Media.ARTIST,
+                Media.DURATION
+            )
+
+            val selection= "${Media.IS_MUSIC} != 0 AND ${Media.DURATION} > 0"
+            val selectionArgs: Array<String>? = null
+
+            val sortOrder = "${Media.DATE_ADDED} DESC"
+
+            resolver.query(
+                Media.EXTERNAL_CONTENT_URI,
+                projection,
+                selection,
+                selectionArgs,
+                sortOrder
+            )?.use { cursor ->
+                val idColumn = cursor.getColumnIndexOrThrow(Media._ID)
+                val nameColumn = cursor.getColumnIndexOrThrow(Media.DISPLAY_NAME)
+                val artistColumn = cursor.getColumnIndexOrThrow(Media.ARTIST)
+                val durationColumn = cursor.getColumnIndexOrThrow(Media.DURATION)
+
+                while (cursor.moveToNext()) {
+                    val id = cursor.getLong(idColumn)
+                    val name = cursor.getString(nameColumn)
+                    val artists = cursor.getString(artistColumn)
+                    val duration = cursor.getLong(durationColumn)
+                    val uri = ContentUris.withAppendedId(Media.EXTERNAL_CONTENT_URI, id)
+
+                    list.add(MainActivity.AudioItem(id, name, artists, duration, uri))
+
+                }
+            }
+
+            audioListIn.postValue(list)
+        }
+    }
+}