我试图从Android设备上的音乐目录查询所有音频文件。由于某种原因，但我没有得到任何，我不知道为什么。
这是我尝试获取音频列表的主要活动：

import android.content.Context
import android.media.AudioAttributes
import android.media.MediaPlayer
import android.net.Uri
import android.os.Bundle
import android.provider.MediaStore
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import com.example.musicplayer.Song
import com.example.musicplayer.components.activities.MainActivityScreen
class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val audioList = querySongData(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, applicationContext)
        setContent {
        }
    }
    private fun querySongData(uri: Uri, context: Context) : List<Song> {
        val audioCursor = context.contentResolver
            .query(
                uri,
                null,
                null,
                null,
                MediaStore.Audio.Media.TITLE + " ASC"
            )
        val files = mutableListOf<Song>()
        if (audioCursor != null && audioCursor.moveToFirst()) {
            do {
                val audioTitle = audioCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE)
                val audioArtist = audioCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST)
                val audioDuration = audioCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION)
                val audioUri = audioCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA)
                files.add(
                    Song(
                        title = audioCursor.getString(audioTitle),
                        artist = audioCursor.getString(audioArtist),
                        lengthInSeconds = audioCursor.getInt(audioDuration),
                        image = Uri.parse(audioCursor.getString(audioUri)),
                    )
                )
            } while (audioCursor.moveToNext())
        }
        audioCursor?.close()
        return files
    }
}

字符串
这是一个简单的Song数据类：

data class Song(
    val title : String,
    val artist : String,
    val image : Uri,
    val lengthInSeconds : Int
    )

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当使用MediaStore.Audio.Media.INTERNAL_CONTENT_URI而不是MediaStore.Audio.Media.EXTERNAL_CONTENT_URI时，我至少可以获得所有的铃声和闹钟铃声，但不能获得我想要的音频文件。这些文件位于“storage/emulated/0/Music”，并且都是.mp3文件。
我还尝试像这样预先声明投影，选择和sortOrder：

val projection = arrayOf(
            MediaStore.Audio.Media.TITLE,
            MediaStore.Audio.Media.ARTIST,
            MediaStore.Audio.Media.DURATION,
            MediaStore.Audio.Media.DATA
        )
val selection = "${MediaStore.Audio.Media.IS_MUSIC} != 0"
val sortOrder = "${MediaStore.Audio.Media.TITLE} ASC"
val audioCursor = context.contentResolver
            .query(
                uri,
                projection,
                selection,
                null,
                sortOrder
            )

型
我也试着在清单中设置权限：

<uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

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但都没有成功。
多谢帮忙！

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13:16:37.778  D  eglCreateContext: 0xec1adab0: maj 3 min 0 rcv 3
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13:16:39.271  W  A resource failed to call close. 
13:16:43.562  D  Installing profile for com.example.musicplayer

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