과제9

app/src/main/AndroidManifest.xml

@@ -4,6 +4,7 @@
 
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
 
     <application
         android:allowBackup="true"
@@ -24,6 +25,10 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <service
+            android:name=".PlayMusic"
+            android:permission="android.permission.BIND_JOB_SERVICE"
+            android:foregroundServiceType="mediaPlayback" />
     </application>
 
 </manifest>

app/src/main/java/com/example/assignment02/AuthorityFragment.kt

@@ -55,12 +55,13 @@ class AuthorityFragment : Fragment() {
     }
 
     private fun requestPermission() {
-        if (ContextCompat.checkSelfPermission(requireContext(), Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
+        if (ContextCompat.checkSelfPermission(requireContext(), Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
+            requestPermissionLauncher.launch(Manifest.permission.READ_EXTERNAL_STORAGE)
+        } else if (ContextCompat.checkSelfPermission(requireContext(), Manifest.permission.FOREGROUND_SERVICE) != PackageManager.PERMISSION_GRANTED) {
+            requestPermissionLauncher.launch(Manifest.permission.FOREGROUND_SERVICE)
+        } else {
             // 권한이 이미 있음
             openFragment()
-        } else {
-            // 권한이 없으면 권한 요청
-            requestPermissionLauncher.launch(Manifest.permission.READ_EXTERNAL_STORAGE)
         }
     }
 

app/src/main/java/com/example/assignment02/ListFragment.kt

@@ -1,57 +1,83 @@
 package com.example.assignment02
 
 import android.Manifest
+import android.annotation.SuppressLint
 import android.content.ContentResolver
+import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager
-import android.net.Uri
+import android.content.res.ColorStateList
+import android.graphics.Color
+import android.os.BatteryManager
 import android.os.Bundle
 import android.provider.MediaStore
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.LinearLayout
 import android.widget.TextView
 import androidx.core.content.ContextCompat
+import androidx.core.graphics.ColorUtils
 import androidx.fragment.app.Fragment
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
-import java.io.File
 
 class ListFragment : Fragment() {
 
     private val data = mutableListOf<Item>()
     private lateinit var adapter: Adapter
+    private lateinit var name: TextView
+    private lateinit var time: TextView
+    private lateinit var energy: LinearLayout
 
     companion object {
         fun newInstance(): ListFragment {
             return ListFragment()
         }
     }
 
+    @SuppressLint("MissingInflatedId")
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View? {
         val view = inflater.inflate(R.layout.fragment_list, container, false)
 
+        name = view.findViewById(R.id.name)
+        time = view.findViewById(R.id.time)
+        energy = view.findViewById(R.id.energe)
+
+        // 배터리에 따라 배경색 변경하기!
+        val battery = getBatteryData(requireContext()) // 0~100(%)
+        energy.backgroundTintList = ColorStateList.valueOf(ColorUtils.blendARGB(Color.parseColor("#00B0FF"), Color.parseColor("#FFFFFF"), battery / 100f))
+
         val recycler_list: RecyclerView = view.findViewById(R.id.recycler_list)
         recycler_list.layoutManager = LinearLayoutManager(requireContext())
-        adapter = Adapter(data)
+        adapter = Adapter(data, name, time)
         recycler_list.adapter = adapter
 
-        if (ContextCompat.checkSelfPermission(requireContext(), Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
+        if (ContextCompat.checkSelfPermission(requireContext(), Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
         ) {
-            // 권한이 있음 -> 음악 파일 추가
-            getMusicFilesData()
-        } else {
-            // 권한이 없음
             openFragment()
         }
+        else if (ContextCompat.checkSelfPermission(requireContext(), Manifest.permission.FOREGROUND_SERVICE) != PackageManager.PERMISSION_GRANTED
+        ) {
+            openFragment()
+        }
+        else {
+            // 권한이 있음
+            getMusicFilesData()
+        }
 
         return view
     }
 
+    fun getBatteryData(context: Context): Int {
+        val batteryManager = context.getSystemService(Context.BATTERY_SERVICE) as BatteryManager
+        return batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY)
+    }
+
     fun getMusicFilesData() {
         val contentResolver: ContentResolver = requireContext().contentResolver
         val uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
@@ -71,9 +97,7 @@ class ListFragment : Fragment() {
             val dataIndex = it.getColumnIndex(MediaStore.Audio.Media.DATA)
 
             while (it.moveToNext()) {
-                Log.d("File Path", "음악 파일 경로: ${it.getString(dataIndex)}")
-
-                val item = Item(it.getString(titleIndex) ?: "Unknown Title", it.getString(artistIndex) ?: "Unknown Artist", it.getLong(durationIndex) ?: 0)
+                val item = Item(it.getString(titleIndex) ?: "Unknown Title", it.getString(artistIndex) ?: "Unknown Artist", it.getLong(durationIndex) ?: 0, it.getString(dataIndex) ?: "")
                 data.add(item)
             }
             adapter.notifyDataSetChanged()
@@ -91,7 +115,7 @@ class ListFragment : Fragment() {
             .commit()
     }
 
-    class Adapter(private val data: MutableList<Item>) : RecyclerView.Adapter<Adapter.ViewHolder>() {
+    class Adapter(private val data: MutableList<Item>, private var name_view:TextView, private var time_view:TextView) : RecyclerView.Adapter<Adapter.ViewHolder>() {
 
         class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
             val title: TextView = itemView.findViewById(R.id.title)
@@ -111,11 +135,19 @@ class ListFragment : Fragment() {
             val m = (item.duration/60000).toString()
             val s = (item.duration/1000 %60).toString()
             holder.duration.text =  "$m:$s"
+
+            holder.itemView.setOnClickListener {
+                name_view.text = item.title
+                time_view.text = holder.duration.text
+                val intent = Intent(holder.itemView.context, PlayMusic::class.java).apply {
+                    putExtra("uri", item.uri)
+                }
+                ContextCompat.startForegroundService(holder.itemView.context, intent)
+            }
         }
 
         override fun getItemCount(): Int = data.size
     }
 
-    data class Item(val title: String, val artist: String, val duration: Long)
-
+    data class Item(val title: String, val artist: String, val duration: Long, val uri: String)
 }

app/src/main/java/com/example/assignment02/MainActivity.kt

@@ -29,4 +29,8 @@ class MainActivity : AppCompatActivity() {
             .replace(R.id.fragment_container, fragment)
             .commit()
     }
+    override fun onBackPressed() {
+        super.onBackPressed()
+        finish()
+    }
 }

app/src/main/java/com/example/assignment02/PlayMusic.kt

@@ -0,0 +1,77 @@
+package com.example.assignment02
+
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Intent
+import android.media.MediaPlayer
+import android.os.Build
+import android.os.IBinder
+import androidx.core.app.NotificationCompat
+import android.net.Uri
+import android.util.Log
+
+class PlayMusic : Service() {
+
+    private var mediaPlayer: MediaPlayer? = null
+    private val channel1 = "channel1"
+
+    override fun onCreate() {
+        super.onCreate()
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val channel = NotificationChannel(
+                channel1,
+                "music",
+                NotificationManager.IMPORTANCE_LOW
+            )
+            val notificationManager = getSystemService(NotificationManager::class.java)
+            notificationManager.createNotificationChannel(channel)
+        }
+
+        val intent = Intent(this, MainActivity::class.java)
+        val pending_intent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_IMMUTABLE)
+
+        // 알림 생성
+        val notification: Notification = NotificationCompat.Builder(this, channel1)
+            .setContentTitle("음악 재생 중...")
+            .setContentText("백그라운드에서 음악이 재생되고 있습니다.")
+            .setSmallIcon(androidx.core.R.drawable.ic_call_answer)
+            .setContentIntent(pending_intent)
+            .setAutoCancel(true)
+            .build()
+
+        startForeground(1, notification)
+    }
+
+    override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
+        val uri_string = intent.getStringExtra("uri")
+        Log.d("PlayMusic", "URI: $uri_string")
+        uri_string?.let {
+            val uri = Uri.parse(it)
+            musicPlay(uri)
+        }
+        return START_STICKY
+    }
+
+    private fun musicPlay(uri: Uri) {
+        mediaPlayer = MediaPlayer().apply {
+            setDataSource(applicationContext, uri)
+            setOnPreparedListener {
+                it.start()
+            }
+            prepareAsync()
+        }
+    }
+
+    override fun onBind(intent: Intent?): IBinder? {
+        return null
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        mediaPlayer?.release()
+    }
+}

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

@@ -10,6 +10,45 @@
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_list"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
+        android:layout_height="wrap_content"
+        android:layout_weight="1" >
+
+    </androidx.recyclerview.widget.RecyclerView>
+
+    <LinearLayout
+        android:id="@+id/energe"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#606060"
+        android:backgroundTint="#00B0FF"
+        android:orientation="vertical"
+        android:padding="20dp">
+
+        <TextView
+            android:id="@+id/textView"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="20dp"
+            android:text="재생중인 음악" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <TextView
+                android:id="@+id/name"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="없음" />
+
+            <TextView
+                android:id="@+id/time"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="00:00" />
+        </LinearLayout>
+    </LinearLayout>
 
 </LinearLayout>