源码地址：
https://github.com/yeaper/MusicPlayer
因项目需要，实现的功能类似
QQ音乐播放界面
使用 kotlin 代替 Java
主要功能：
1、播放、暂停音乐
2、自动、手动设置进度条，并且同步播放音乐
3、开启、暂停、停止匀速旋转的动画
先看效果图：
1、布局文件
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white"
tools:context="cc.redhome.hduin.view.discover.hduradio.programalbum.ProgramPlayActivity">
<ImageView
android:id="@+id/programPlayHeaderBg"
android:layout_width="match_parent"
android:layout_height="240dp"
android:background="@drawable/hdu_radio_header_bg"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/programPlayLyric"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:gravity="center_horizontal"
android:layout_marginTop="80dp"
android:layout_marginLeft="25dp"
android:layout_marginRight="25dp"
android:lineSpacingMultiplier="1.5"
android:textColor="@color/white"
android:textSize="17sp"/>
<FrameLayout
android:layout_width="140dp"
android:layout_height="140dp"
android:layout_gravity="center_horizontal"
android:layout_marginTop="30dp">
<com.pkmmte.view.CircularImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:src="@drawable/developer_fat"
app:shadow="true"
app:border="true"
app:border_width="9dp"
app:border_color="@color/record_border_bg_color" />
<com.pkmmte.view.CircularImageView
android:id="@+id/programPlayRecordImage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_margin="6dp"/>
</FrameLayout>
<TextView
android:id="@+id/programPlayName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dp"
android:textColor="@color/primaryTextDark"
android:textSize="17sp"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/programPlayAnchor"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:textColor="@color/primaryTextDark"
android:textSize="16sp"/>
<TextView
android:id="@+id/programPlayDirector"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/programPlayAnchor"
android:layout_alignLeft="@id/programPlayAnchor"
android:textColor="@color/primaryTextDark"
android:textSize="16sp"/>
<TextView
android:id="@+id/programPlayProducer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/programPlayDirector"
android:layout_alignLeft="@id/programPlayAnchor"
android:textColor="@color/primaryTextDark"
android:textSize="16sp"/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp">
<TextView
android:id="@+id/programPlayStartTime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:textColor="@color/time_text_color"
android:textSize="13sp"
android:text="00:00"/>
<TextView
android:id="@+id/programPlayEndTime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:textColor="@color/time_text_color"
android:textSize="13sp"/>
<app.minimize.com.seek_bar_compat.SeekBarCompat
android:id="@+id/programPlayProgressBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="@id/programPlayStartTime"
android:layout_toLeftOf="@id/programPlayEndTime"
android:max="100"
android:maxHeight="4dp"
android:progressDrawable="@drawable/program_play_seekbar_bg"
app:progressBackgroundColor="@color/seekBar_bg_color"
app:progressColor="@color/seekBar_progress_color"
app:thumbColor="@color/seekBar_progress_color"
app:thumbAlpha="1.0"/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:layout_marginBottom="20dp">
<ImageView
android:id="@+id/programPlayStart"
android:layout_width="72dp"
android:layout_height="72dp"
android:layout_centerHorizontal="true"
android:src="@drawable/program_play_start"/>
<ImageView
android:id="@+id/programPlayPrevious"
android:layout_width="19dp"
android:layout_height="19dp"
android:layout_toLeftOf="@id/programPlayStart"
android:layout_centerVertical="true"
android:layout_marginRight="30dp"
android:src="@drawable/program_play_previous"/>
<ImageView
android:id="@+id/programPlayNext"
android:layout_width="19dp"
android:layout_height="19dp"
android:layout_toRightOf="@id/programPlayStart"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:src="@drawable/program_play_next"/>
</RelativeLayout>
</LinearLayout>
<include layout="@layout/toolbar_transparent"/>
</FrameLayout>
主要用到 2 个第三方控件
（1）compile ‘com.pkmmte.view:circularimageview:1.1’
（2）compile ‘com.minimize.library:seekbar-compat:0.2.5’
其中，
program_play_seekbar_bg.XML
文件如下：
<?xml version="1.0" encoding="utf-8"?>
<layer-list
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@android:id/background">
<shape>
<corners android:radius="10dp"/>
</shape>
</item>
<item android:id="@android:id/secondaryProgress">
<clip>
<shape>
<corners android:radius="10dp"/>
</shape>
</clip>
</item>
<item android:id="@android:id/progress">
<clip>
<shape>
<corners android:radius="10dp"/>
</shape>
</clip>
</item>
</layer-list>
2、后台播放、暂停音乐服务类
class MusicPlayerService : Service() {
private var mediaPlayer: MediaPlayer? = null
override fun onBind(p0: Intent?): IBinder {
return MyBinder()
}
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
var action = ""
var musicUrl = ""
//获取意图传递的信息
if(intent != null){
action = intent.getStringExtra("action")
musicUrl = intent.getStringExtra("musicUrl")
}
when (action) {
"prepare" -> {
if (mediaPlayer == null) {
mediaPlayer = MediaPlayer()
mediaPlayer!!.setAudioStreamType(AudioManager.STREAM_MUSIC)
mediaPlayer!!.setDataSource(musicUrl)
mediaPlayer!!.prepare()
}
}
"play" -> {
if (mediaPlayer == null) {
mediaPlayer = MediaPlayer()
mediaPlayer!!.setAudioStreamType(AudioManager.STREAM_MUSIC)
mediaPlayer!!.setDataSource(musicUrl)
mediaPlayer!!.prepare()
}
if (mediaPlayer != null && !mediaPlayer!!.isPlaying) {
mediaPlayer!!.start()
}
}
"pause" -> {
if (mediaPlayer != null && mediaPlayer!!.isPlaying) {
mediaPlayer!!.pause()
}
}
"stop" -> {
if (mediaPlayer != null && mediaPlayer!!.isPlaying) {
mediaPlayer!!.stop()
}
}
"release" -> {
if (mediaPlayer != null) {
mediaPlayer!!.stop()
mediaPlayer!!.release()
mediaPlayer = null
}
}
}
return super.onStartCommand(intent, flags, startId)
}
internal inner class MyBinder : Binder() {
//获取歌曲长度
fun getMusicDuration(): Int {
var rtn = 0
if (mediaPlayer != null) {
rtn = mediaPlayer!!.duration
}
return rtn
}
//获取当前播放进度
fun getMusicCurrentPosition(): Int {
var rtn = 0
if (mediaPlayer != null) {
rtn = mediaPlayer!!.currentPosition
}
return rtn
}
fun seekTo(position: Int) {
if (mediaPlayer != null) {
mediaPlayer!!.seekTo(position)
}
}
}
}
3、音乐播放类
class ProgramPlayActivity : BaseActivity() {
var actionBar: ActionBar? = null
var pastProgram: PastProgram? = null
var serviceConnection: ServiceConnection? = null
private var binder: MusicPlayerService.MyBinder? = null
var isFinished = false // 是否结束当前activity的标志
var isPlaying = false
private var currentValue = 0f
private var objAnim: ObjectAnimator? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_program_play)
initToolbar()
initInfo()
}
fun initToolbar(){
setSupportActionBar(toolbar)
actionBar = supportActionBar
if (actionBar != null) {
// 显示返回按钮
actionBar!!.setDisplayHomeAsUpEnabled(true)
// 隐藏 ActionBar 自带标题
actionBar!!.setDisplayShowTitleEnabled(false)
}
}
fun initInfo(){
if(intent.extras != null){
pastProgram = intent.getSerializableExtra("program") as PastProgram?
}
toolbar_title.text = pastProgram!!.name
Picasso.with(this)
.load(pastProgram!!.bgImageUrl)
.placeholder(R.drawable.hdu_radio_header_bg)
.into(programPlayHeaderBg)
Picasso.with(this)
.load(pastProgram!!.bgImageUrl)
.placeholder(R.drawable.developer_fat)
.into(programPlayRecordImage)
programPlayLyric.text = "The truth that you leave-Pianoboy\n说了再见以后-苏打绿"
programPlayName.text = pastProgram!!.name
programPlayAnchor.text = "主播：罗焓智"
programPlayDirector.text = "导播："+pastProgram!!.director
programPlayProducer.text = "监制："+pastProgram!!.producer
initRotateAnim()
prepareMediaPlayer()
setListener()
}
/**
* 准备播放器
*/
fun prepareMediaPlayer(){
val intent = Intent(this, MusicPlayerService::class.java)
intent.putExtra("action", "prepare")
intent.putExtra("musicUrl", pastProgram!!.audioUrl)
startService(intent)
if (serviceConnection == null) {
serviceConnection = object : ServiceConnection {
override fun onServiceConnected(name: ComponentName, service: IBinder) {
binder = service as MusicPlayerService.MyBinder
// 设置进度条的最大长度
programPlayProgressBar.max = binder!!.getMusicDuration()
// 设置歌曲总时长
programPlayEndTime.text = msecToPlayTime(binder!!.getMusicDuration())
programPlayProgressBar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
// 手动控制进度
if(fromUser){
binder!!.seekTo(progress)
}
// 播放结束后，还原状态
if(progress == seekBar.max){
binder!!.seekTo(0)
val msg = handler.obtainMessage()
msg.what = 3
handler.sendMessage(msg)
}
}
override fun onStartTrackingTouch(seekBar: SeekBar) {
}
override fun onStopTrackingTouch(seekBar: SeekBar) {
}
})
// 连接之后启动子线程设置当前进度
object : Thread() {
override fun run() {
while (true) {
if(isFinished){
break
}
// 改变当前进度条的值
val msg1 = handler.obtainMessage()
msg1.what = 1
msg1.arg1 = binder!!.getMusicCurrentPosition()
handler.sendMessage(msg1)
// 改变起始时间
val msg2 = handler.obtainMessage()
msg2.what = 2
msg2.obj = msecToPlayTime(binder!!.getMusicCurrentPosition())
handler.sendMessage(msg2)
try {
Thread.sleep(100)
} catch (e: Exception) {
e.printStackTrace()
}
}
}
}.start()
}
override fun onServiceDisconnected(name: ComponentName) {
}
}
// 以绑定方式连接服务
bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE)
}
}
fun setListener(){
programPlayStart.setOnClickListener {
playPause()
}
programPlayPrevious.setOnClickListener {
}
programPlayNext.setOnClickListener {
}
}
private var handler = object : Handler() {
override fun handleMessage(msg: Message?) {
when(msg!!.what){
1 -> {
programPlayProgressBar.progress = msg.arg1
}
2 -> {
programPlayStartTime.text = msg.obj as String
}
3 -> {
resetPlay()
}
}
}
}
/**
* 开启动画
*/
fun startAnimation() {
// 设置动画，从上次停止位置开始,这里是顺时针旋转360度
objAnim = ObjectAnimator.ofFloat(programPlayRecordImage, "Rotation",
currentValue - 360, currentValue)
// 设置持续时间
objAnim!!.duration = 30000
// 设置循环播放
objAnim!!.repeatCount = ObjectAnimator.INFINITE
// 设置匀速播放
val lin: LinearInterpolator = LinearInterpolator()
objAnim!!.interpolator = lin
// 设置动画监听
objAnim!!.addUpdateListener({ animation ->
// 监听动画执行的位置，以便下次开始时，从当前位置开始
currentValue = animation.animatedValue as Float
})
objAnim!!.start()
}
/**
* 停止动画
*/
fun stopAnimation() {
objAnim!!.end()
currentValue = 0f // 重置起始位置
}
/**
* 暂停动画
*/
fun pauseAnimation() {
objAnim!!.cancel()
}
/**
* 播放、暂停音乐
*/
fun playPause(){
if(!isPlaying){
isPlaying = true
programPlayStart.setImageResource(R.drawable.program_play_pause)
// 开启图片旋转动画
startAnimation()
val intent = Intent(this, MusicPlayerService::class.java)
intent.putExtra("action", "play")
intent.putExtra("musicUrl", pastProgram!!.audioUrl)
startService(intent)
}else {
isPlaying = false
programPlayStart.setImageResource(R.drawable.program_play_start)
// 暂停动画
pauseAnimation()
val intent = Intent(this, MusicPlayerService::class.java)
intent.putExtra("action", "pause")
intent.putExtra("musicUrl", pastProgram!!.audioUrl)
startService(intent)
}
}
/**
* 还原到音乐起始状态
*/
fun resetPlay(){
isPlaying = false
programPlayStart.setImageResource(R.drawable.program_play_start)
programPlayProgressBar.progress = 0
programPlayStartTime.text = "00:00"
// 关闭动画
stopAnimation()
val intent = Intent(this, MusicPlayerService::class.java)
intent.putExtra("action", "pause")
intent.putExtra("musicUrl", pastProgram!!.audioUrl)
startService(intent)
}
/**
* 毫秒转换为播放时间
*/
fun msecToPlayTime(time: Int): String{
var min = time.div(60000).toString()
var second = time.mod(60000).div(1000).toString()
if(min.toInt() < 10){
min = "0"+min
}
if(second.toInt() < 10){
second = "0"+second
}
return min+":"+second
}
override fun onCreateOptionsMenu(menu: Menu?): Boolean {
menuInflater.inflate(R.menu.toolbar_transport_menu, menu)
return true
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when(item.itemId){
android.R.id.home -> { finish() }
R.id.program_play_music_list -> {}
}
return super.onOptionsItemSelected(item)
}
override fun onDestroy() {
super.onDestroy()
// 停止更新UI
isFinished = true
// 关闭播放器，解绑服务
val intent = Intent(this, MusicPlayerService::class.java)
intent.putExtra("action", "release")
intent.putExtra("musicUrl", pastProgram!!.audioUrl)
startService(intent)
unbindService(serviceConnection)
}
}
有具体问题，可以留言讨论！！
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