Fixed Playlist save

app/src/main/java/code/name/monkey/retromusic/dialogs/SavePlaylistDialog.kt

@@ -21,13 +21,16 @@ import android.widget.Toast
 import androidx.core.os.bundleOf
 import androidx.fragment.app.DialogFragment
 import androidx.lifecycle.lifecycleScope
+import code.name.monkey.appthemehelper.util.VersionUtils
 import code.name.monkey.retromusic.App
 import code.name.monkey.retromusic.EXTRA_PLAYLIST
 import code.name.monkey.retromusic.R
 import code.name.monkey.retromusic.db.PlaylistWithSongs
 import code.name.monkey.retromusic.extensions.colorButtons
+import code.name.monkey.retromusic.extensions.createNewFile
 import code.name.monkey.retromusic.extensions.extraNotNull
 import code.name.monkey.retromusic.extensions.materialDialog
+import code.name.monkey.retromusic.helper.M3UWriter
 import code.name.monkey.retromusic.util.PlaylistsUtil
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -46,8 +49,44 @@ class SavePlaylistDialog : DialogFragment() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        lifecycleScope.launch(Dispatchers.IO) {
         val playlistWithSongs = extraNotNull<PlaylistWithSongs>(EXTRA_PLAYLIST).value
+
+        if (VersionUtils.hasR()) {
+            createNewFile(
+                "audio/mpegurl",
+                playlistWithSongs.playlistEntity.playlistName
+            ) { outputStream, data ->
+                try {
+                    if (outputStream != null) {
+                        lifecycleScope.launch(Dispatchers.IO) {
+                            M3UWriter.writeIO(
+                                outputStream,
+                                playlistWithSongs
+                            )
+                            withContext(Dispatchers.Main) {
+                                Toast.makeText(
+                                    requireContext(),
+                                    String.format(
+                                        requireContext().getString(R.string.saved_playlist_to),
+                                        data?.lastPathSegment
+                                    ),
+                                    Toast.LENGTH_LONG
+                                ).show()
+                                dismiss()
+                            }
+                        }
+                    }
+                } catch (e: Exception) {
+                    Toast.makeText(
+                        context,
+                        "Something went wrong : " + e.message,
+                        Toast.LENGTH_SHORT
+                    )
+                        .show()
+                }
+            }
+        } else {
+            lifecycleScope.launch(Dispatchers.IO) {
                 val file = PlaylistsUtil.savePlaylistWithSongs(playlistWithSongs)
                 MediaScannerConnection.scanFile(
                     requireActivity(),
@@ -65,6 +104,7 @@ class SavePlaylistDialog : DialogFragment() {
                 }
             }
         }
+    }
 
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
         return materialDialog(R.string.save_playlist_title)

app/src/main/java/code/name/monkey/retromusic/extensions/IntentExtensions.kt

@@ -0,0 +1,35 @@
+package code.name.monkey.retromusic.extensions
+
+import android.app.Activity
+import android.content.Intent
+import android.net.Uri
+import android.os.Environment
+import android.provider.DocumentsContract
+import androidx.activity.result.ActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.documentfile.provider.DocumentFile
+import androidx.fragment.app.Fragment
+import java.io.File
+import java.io.OutputStream
+
+fun Fragment.createNewFile(
+    mimeType: String,
+    fileName: String,
+    write: (outputStream: OutputStream?, data: Uri?) -> Unit
+) {
+    val intent = Intent(Intent.ACTION_CREATE_DOCUMENT)
+    intent.addCategory(Intent.CATEGORY_OPENABLE)
+    intent.type = mimeType
+    intent.putExtra(Intent.EXTRA_TITLE, fileName)
+    val startForResult =
+        registerForActivityResult(ActivityResultContracts.StartActivityForResult())
+        { result: ActivityResult ->
+            if (result.resultCode == Activity.RESULT_OK) {
+                val outputStream: OutputStream? =
+                    context?.contentResolver?.openOutputStream(result.data?.data!!)
+                write(outputStream, result.data?.data)
+            }
+
+        }
+    startForResult.launch(intent)
+}

app/src/main/java/code/name/monkey/retromusic/helper/M3UWriter.kt

@@ -18,10 +18,7 @@ import code.name.monkey.retromusic.db.PlaylistWithSongs
 import code.name.monkey.retromusic.db.toSongs
 import code.name.monkey.retromusic.model.Playlist
 import code.name.monkey.retromusic.model.Song
-import java.io.BufferedWriter
+import java.io.*
-import java.io.File
-import java.io.FileWriter
-import java.io.IOException
 
 object M3UWriter : M3UConstants {
     @JvmStatic
@@ -69,4 +66,23 @@ object M3UWriter : M3UConstants {
         }
         return file
     }
+
+    fun writeIO(outputStream: OutputStream, playlistWithSongs: PlaylistWithSongs) {
+        val songs: List<Song> = playlistWithSongs.songs.sortedBy {
+            it.songPrimaryKey
+        }.toSongs()
+        if (songs.isNotEmpty()) {
+            val bufferedWriter = outputStream.bufferedWriter()
+            bufferedWriter.write(M3UConstants.HEADER)
+            songs.forEach {
+                bufferedWriter.newLine()
+                bufferedWriter.write(M3UConstants.ENTRY + it.duration + M3UConstants.DURATION_SEPARATOR + it.artistName + " - " + it.title)
+                bufferedWriter.newLine()
+                bufferedWriter.write(it.data)
+            }
+            bufferedWriter.close()
+        }
+        outputStream.flush()
+        outputStream.close()
+    }
 }

app/src/main/java/code/name/monkey/retromusic/util/PlaylistsUtil.java

@@ -36,6 +36,7 @@ import java.util.List;
 
 import code.name.monkey.retromusic.R;
 import code.name.monkey.retromusic.db.PlaylistWithSongs;
+import code.name.monkey.retromusic.helper.M3UConstants;
 import code.name.monkey.retromusic.helper.M3UWriter;
 import code.name.monkey.retromusic.model.Playlist;
 import code.name.monkey.retromusic.model.PlaylistSong;

appthemehelper/src/main/java/code/name/monkey/appthemehelper/util/VersionUtils.kt

@@ -8,18 +8,11 @@ import android.os.Build
 
 object VersionUtils {
 
-    /**
-     * @return true if device is running API >= 21
-     */
-    fun hasLollipop(): Boolean {
-        return Build.VERSION.SDK_INT >= 21
-    }
-
     /**
      * @return true if device is running API >= 23
      */
     fun hasMarshmallow(): Boolean {
-        return Build.VERSION.SDK_INT >= 23
+        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
     }
 
     /**
@@ -30,7 +23,7 @@ object VersionUtils {
     }
 
     /**
-     * @return true if device is running API >= 24
+     * @return true if device is running API >= 25
      */
     fun hasNougatMR(): Boolean {
         return Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1
@@ -44,20 +37,31 @@ object VersionUtils {
     }
 
     /**
-     * @return true if device is running API >= 27
+     * @return true if device is running API >= 28
      */
     fun hasP(): Boolean {
         return Build.VERSION.SDK_INT >= Build.VERSION_CODES.P
     }
 
     /**
-     * @return true if device is running API >= 28
+     * @return true if device is running API >= 29
      */
     @JvmStatic
     fun hasQ(): Boolean {
         return Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q
     }
 
+    /**
+     * @return true if device is running API >= 30
+     */
+    @JvmStatic
+    fun hasR(): Boolean {
+        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.R
+    }
+
+    /**
+     * @return true if device is running API >= 31
+     */
     @JvmStatic
     fun hasS(): Boolean {
         return Build.VERSION.SDK_INT >= Build.VERSION_CODES.S