前面已经添加了权限，有权限后可以去数据库读取音乐文件，一般可以获取全部音乐、专辑、歌手、流派等。
1. 获取全部音乐数据
class MusicHelper {
companion object {
@SuppressLint("Range")
fun getMusic(context: Context): MutableList<MusicData> {
var songNumber = 0
val songsList: MutableList<MusicData> = ArrayList() //用于装歌曲数据
val contentResolver: ContentResolver = context.contentResolver
var cursor: Cursor? = null
try {
cursor = contentResolver.query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
null, null, null, null
);
if (cursor != null) {
while (cursor.moveToNext()) {
//是否是音频
val isMusic =
cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.IS_MUSIC))
//时长
val duration =
cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.DURATION))
//是音乐并且时长大于30秒
if (isMusic != 0 && duration >= 30 * 1000) {
//歌名
val title = cursor.getString(
cursor.getColumnIndexOrThrow(
MediaStore.Audio.Media.TITLE
)
)
//歌手
val artist = cursor.getString(
cursor.getColumnIndexOrThrow(
MediaStore.Audio.Media.ARTIST
)
);
//专辑id
val albumId =
cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID))
//文件路径
val dataPath = cursor.getString(
cursor.getColumnIndexOrThrow(
MediaStore.Audio.Media.DATA
)
)
val data: String =
cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DATA))
val id = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media._ID))
val music = MusicData(id, -1, albumId, title, artist, "", data, duration, songNumber, dataPath)
songsList.add(music)
songNumber++
}
}
}
} catch (e: Exception) {
e.printStackTrace();
} finally {
cursor?.close()
}
return songsList
}
}
}数据类MusicData
import java.io.Serializable
data class MusicData(
val id: Long,
val artistId: Int,
val albumId: Long,
val title: String,
val artist: String,
val album: String,
val data:String,
val duration: Long,
val songSize: Int,
val path:String
) : Serializable
2. 获取流派音乐数据
/**
* 获取所有流派
*
* @param context
* @return
*/
@SuppressLint("Range")
fun getGenres(context: Context): List<GenresData?> {
val cursor = context.contentResolver.query(MediaStore.Audio.Genres.EXTERNAL_CONTENT_URI, null, null, null, null)
var genresList: MutableList<GenresData?> = ArrayList()
if (cursor != null) {
genresList = java.util.ArrayList(cursor.count)
while (cursor.moveToNext()) {
val id = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Genres._ID))
val name = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Genres.NAME))
genresList.add(GenresData(id, name))
}
cursor.close()
}
return genresList
}
数据类
data class GenresData(val id: Long, val name: String, val count: Int) {
}获取艺术家
/**
* 获取艺术家
* @param context
*/
fun getArtistsForCursor(context: Context): List<ArtistData> {
val artistSortOrder = PreferencesUtility.getInstance(context).artistSortOrder
val cursor: Cursor? = context.contentResolver.query(
MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI,
arrayOf(DATA, ARTIST, NUMBER_ALBUM, NUMBER_TRACK),
null,
null,
artistSortOrder
)
val arrayList: MutableList<ArtistData> = ArrayList()
if (cursor != null && cursor.moveToFirst()) do {
val artist = ArtistData(
cursor.getLong(0), cursor.getString(1), cursor.getInt(2), cursor.getInt(3)
)
arrayList.add(artist)
} while (cursor.moveToNext())
cursor?.close()
return arrayList
}数据类
data class ArtistData(val id: Long, val name: String, val count: Int, val num: Int) {
}完整代码
package com.zong.musiclib.helper
import android.annotation.SuppressLint
import android.content.ContentResolver
import android.content.Context
import android.database.Cursor
import android.provider.MediaStore
import com.zong.musiclib.utils.PreferencesUtility
object MusicHelper {
private const val DATA = "_id"
private const val ARTIST = "artist"
private const val NUMBER_ALBUM = "number_of_albums"
private const val NUMBER_TRACK = "number_of_tracks"
@SuppressLint("Range")
fun getMusic(context: Context): MutableList<MusicData> {
var songNumber = 0
val songsList: MutableList<MusicData> = ArrayList() //用于装歌曲数据
val contentResolver: ContentResolver = context.contentResolver
var cursor: Cursor? = null
try {
cursor = contentResolver.query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
null, null, null, null
);
if (cursor != null) {
while (cursor.moveToNext()) {
//是否是音频
val isMusic =
cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.IS_MUSIC))
//时长
val duration =
cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.DURATION))
//是音乐并且时长大于30秒
if (isMusic != 0 && duration >= 30 * 1000) {
//歌名
val title = cursor.getString(
cursor.getColumnIndexOrThrow(
MediaStore.Audio.Media.TITLE
)
)
//歌手
val artist = cursor.getString(
cursor.getColumnIndexOrThrow(
MediaStore.Audio.Media.ARTIST
)
);
//专辑id
val albumId =
cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID))
//文件路径
val dataPath = cursor.getString(
cursor.getColumnIndexOrThrow(
MediaStore.Audio.Media.DATA
)
)
val data: String =
cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DATA))
val id = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media._ID))
val music = MusicData(id, -1, albumId, title, artist, "", data, duration, songNumber, dataPath)
songsList.add(music)
songNumber++
}
}
}
} catch (e: Exception) {
e.printStackTrace();
} finally {
cursor?.close()
}
return songsList
}
/**
* 获取所有流派
*
* @param context
* @return
*/
@SuppressLint("Range")
fun getGenres(context: Context): List<GenresData?> {
val cursor = context.contentResolver.query(MediaStore.Audio.Genres.EXTERNAL_CONTENT_URI, null, null, null, null)
var genresList: MutableList<GenresData?> = ArrayList()
if (cursor != null) {
genresList = java.util.ArrayList(cursor.count)
while (cursor.moveToNext()) {
val id = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Genres._ID))
val name = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Genres.NAME))
genresList.add(GenresData(id, name))
}
cursor.close()
}
return genresList
}
/**
* 获取艺术家
* @param context
*/
fun getArtistsForCursor(context: Context): List<ArtistData> {
val artistSortOrder = PreferencesUtility.getInstance(context).artistSortOrder
val cursor: Cursor? = context.contentResolver.query(
MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI,
arrayOf(DATA, ARTIST, NUMBER_ALBUM, NUMBER_TRACK),
null,
null,
artistSortOrder
)
val arrayList: MutableList<ArtistData> = ArrayList()
if (cursor != null && cursor.moveToFirst()) do {
val artist = ArtistData(
cursor.getLong(0), cursor.getString(1), cursor.getInt(2), cursor.getInt(3)
)
arrayList.add(artist)
} while (cursor.moveToNext())
cursor?.close()
return arrayList
}
}
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