Android程序设计之音乐播放器实现

Android毕设音乐播放器实现

基于MediaPlayer技术实现在线音乐播放器，播放在线音乐，后端使用SpringBoot将音乐存放在Tomcat服务器。app通过网络请求获取音乐，从而实现在线音乐播放。该项目分为用户端和管理员端

一、核心技术Service组件介绍

Service它可以在后台执行长时间运行操作而没有用户界面的应用组件，不依赖任何用户界面，例如后台播放音乐，后台下载文件等。

虽然服务是在后台运行的，但是Service和Activity都是运行在当前APP所在的main thread（UI主线程）中的，而耗时操作（如网络请求、拷贝数据、大文件）会阻塞主线程，给用户带来不好的体验。如果需要在服务中进行耗时操作，可以选择 IntentService，IntentService是Service的子类，用来处理异步请求。

二、如何使用SerVice

创建Service直接在Android Studio中右键选择Service创建即可。默认我们所创建的Service是继承Service的。同时我们为了实现后台音乐播放的功能，所以我们还要实MediaPlayer.OnCompletionListener的接口。

同时还要在AndroidManifest.xml文件中对已经创建的Service进行注册，这一点Android Studio已经帮我们自动创建好了

三、Service启动的两种方式

（1）在Acitivity界面通过显式意图（或隐式意图）的方式来启动服务和关闭服务。

Intent intentService = new Intent(MainActivity.this, AudioService.class);startService(intentService);

（2）bindService()绑定服务

当应用组件通过调用 bindService() 绑定到服务时，服务即处于“绑定”状态。绑定服务提供了一个客户端-服务器接口，允许组件与服务进行交互、发送请求、获取结果。仅当与另一个应用组件绑定时，绑定服务才会运行。多个组件可以同时绑定到该服务，但全部取消绑定后，该服务即会被销毁。

1. 用户端功能模块：登录，注册，音乐推荐，音乐分类，个人中心，音乐浏览记录，我的下载，上一曲，下一曲，音乐下载

2.管理员模块：登录，注册，用户管理，音乐分类管理（添加分类，删除分类，编辑分类），音乐管理（修改歌名，移动音乐分类，删除音乐）

3.部分核心代码实现

欢迎页

/*** 欢迎页*/
@SuppressLint("CustomSplashScreen")
public class SplashActivity extends BaseActivity<ActivitySplashBinding> {@Overrideprotected ActivitySplashBinding getViewBinding() {return ActivitySplashBinding.inflate(getLayoutInflater());}@Overrideprotected void setListener() {}@Overrideprotected void initData() {new Handler(Looper.myLooper()).postDelayed(new Runnable() {@Overridepublic void run() {startActivity(new Intent(mContext,LoginActivity.class));finish();}},800);}
}

用户主页面

/*** 用户主页面*/
public class MainActivity extends BaseActivity<ActivityMainBinding> {private String[] titles = {"音乐推荐", "音乐分类"};private List<Fragment> fragmentList = new ArrayList<>();@Overrideprotected ActivityMainBinding getViewBinding() {return ActivityMainBinding.inflate(getLayoutInflater());}@Overrideprotected void setListener() {mBinding.avatar.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {startActivityForResult(new Intent(MainActivity.this, MineActivity.class), 20002);}});}@Overrideprotected void initData() {if (ApiConstants.getUserInfo() != null) {mBinding.username.setText(ApiConstants.getUserInfo().getUsername());}//造数据fragmentList.add(new HomeFragment());fragmentList.add(new TypeFragment());
//        fragmentList.add(new RecordFragment());//如果处理成懒加载的话，其实很简单，只要是这个方法setOffscreenPageLimit不去设置，就可以了。
//        mBinding.viewPager.setOffscreenPageLimit(fragmentList.size());mBinding.viewPager.setUserInputEnabled(false);mBinding.viewPager.setAdapter(new FragmentStateAdapter(this) {@NonNull@Overridepublic Fragment createFragment(int position) {return fragmentList.get(position);}@Overridepublic int getItemCount() {return fragmentList.size();}});mBinding.tabs.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {@Overridepublic void onTabSelected(TabLayout.Tab tab) {mBinding.viewPager.setCurrentItem(tab.getPosition(), false);}@Overridepublic void onTabUnselected(TabLayout.Tab tab) {}@Overridepublic void onTabReselected(TabLayout.Tab tab) {}});TabLayoutMediator tabLayoutMediator = new TabLayoutMediator(mBinding.tabs, mBinding.viewPager, new TabLayoutMediator.TabConfigurationStrategy() {@Overridepublic void onConfigureTab(@NonNull TabLayout.Tab tab, int position) {tab.setText(titles[position]);}});//这句话很重要tabLayoutMediator.attach();}@Overrideprotected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {super.onActivityResult(requestCode, resultCode, data);if (resultCode == 20002) {finish();}}
}

音乐播放界面

/*** 音乐播放界面*/
public class PlayMusicActivity extends BaseActivity<ActivityPlayMusicBinding> implements OnPlayerEventListener {private static final String TAG = "============";private MusicInfo musicInfo;private int mLastProgress;@Overrideprotected ActivityPlayMusicBinding getViewBinding() {return ActivityPlayMusicBinding.inflate(getLayoutInflater());}@Overrideprotected void setListener() {Aria.download(this).register();mBinding.sbProgress.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean b) {if (Math.abs(progress - mLastProgress) >= DateUtils.SECOND_IN_MILLIS) {mBinding.tvCurrentTime.setText(formatTime("mm:ss", progress));mLastProgress = progress;}}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {if (AudioPlayer.get().isPlaying() || AudioPlayer.get().isPausing()) {int progress = seekBar.getProgress();AudioPlayer.get().seekTo(progress);} else {seekBar.setProgress(0);}}});mBinding.ivMusicPlay.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {AudioPlayer.get().playPause();}});mBinding.ivMusicPrevious.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {AudioPlayer.get().prev();}});mBinding.ivMusicNext.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {AudioPlayer.get().next();}});//下载mBinding.download.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {if (XXPermissions.isGranted(mContext, Permission.Group.STORAGE)) {download();} else {checkPermission();}}});}@Overrideprotected void initData() {initSystemBar();musicInfo = (MusicInfo) getIntent().getSerializableExtra("musicInfo");//监听AudioPlayer.get().addOnPlayEventListener(this);if (null != musicInfo) {AudioPlayer.get().addAndPlay(musicInfo);//添加到浏览记录addRecord(musicInfo);//获取单个任务实体DownloadEntity entity = Aria.download(this).getFirstDownloadEntity(musicInfo.getMusic_url());if (null != entity) {mBinding.download.setClickable(false);mBinding.download.setImageResource(R.mipmap.ic_download_complete);} else {mBinding.download.setClickable(true);mBinding.download.setImageResource(R.mipmap.iv_download);}}}/*** 沉浸式状态栏*/private void initSystemBar() {ImmersionBar.with(this).init();}public String formatTime(String pattern, long milli) {int m = (int) (milli / DateUtils.MINUTE_IN_MILLIS);int s = (int) ((milli / DateUtils.SECOND_IN_MILLIS) % 60);String mm = String.format(Locale.getDefault(), "%02d", m);String ss = String.format(Locale.getDefault(), "%02d", s);return pattern.replace("mm", mm).replace("ss", ss);}@SuppressLint("SetTextI18n")private void onChangeImpl(MusicInfo music) {if (music == null) {return;}mBinding.sbProgress.setProgress((int) AudioPlayer.get().getAudioPosition());mBinding.sbProgress.setSecondaryProgress(0);mLastProgress = 0;mBinding.tvCurrentTime.setText("00:00");if (AudioPlayer.get().isPlaying() || AudioPlayer.get().isPreparing()) {mBinding.ivMusicPlay.setSelected(true);} else {mBinding.ivMusicPlay.setSelected(false);}mBinding.toolbar.setTitle(music.getMusic_title());mBinding.tvMusicTitle.setText(music.getMusic_title());mBinding.tvMusicSongType.setText(music.getMusic_type());startAnim();}@Overridepublic void onChange(MusicInfo music) {onChangeImpl(music);}@Overridepublic void onPlayerStart(long duration) {//一定要设置最大值mBinding.sbProgress.setMax((int) duration);mBinding.tvTotalTime.setText(formatTime("mm:ss", duration));mBinding.ivMusicPlay.setSelected(true);startAnim();}@Overridepublic void onPlayerPause() {mBinding.ivMusicPlay.setSelected(false);stopAnim();}@Overridepublic void onPublish(int progress) {mBinding.sbProgress.setProgress(progress);}@Overridepublic void onBufferingUpdate(int percent) {mBinding.sbProgress.setSecondaryProgress(mBinding.sbProgress.getMax() * 100 / percent);}private Animation animation;private void startAnim() {animation = AnimationUtils.loadAnimation(this, R.anim.rotation_animation);LinearInterpolator lin = new LinearInterpolator();//设置动画匀速运动animation.setInterpolator(lin);mBinding.imgCd.startAnimation(animation);}private void stopAnim() {if (mBinding.imgCd.getAnimation() != null) {mBinding.imgCd.clearAnimation();}}private void addRecord(MusicInfo musicInfo) {OkGo.<String>get(ApiConstants.ADD_RECORD_MUSIC_URL).params("username", ApiConstants.getUserInfo().getUsername()).params("music_title", musicInfo.getMusic_title()).params("music_url", musicInfo.getMusic_url()).params("music_type", musicInfo.getMusic_type()).execute(new HttpStringCallback(null) {@Overrideprotected void onSuccess(String msg, String response) {}@Overrideprotected void onError(String response) {}});}private void checkPermission() {XXPermissions.with(this)// 申请单个权限// 申请多个权限.permission(Permission.Group.STORAGE)// 设置权限请求拦截器（局部设置）//.interceptor(new PermissionInterceptor())// 设置不触发错误检测机制（局部设置）//.unchecked().request(new OnPermissionCallback() {@Overridepublic void onGranted(List<String> permissions, boolean all) {if (!all) {showToast("获取部分权限成功，但部分权限未正常授予");return;}//这里做操作}@Overridepublic void onDenied(List<String> permissions, boolean never) {if (never) {showToast("被永久拒绝授权，请手动授予录音和日历权限");// 如果是被永久拒绝就跳转到应用权限系统设置页面XXPermissions.startPermissionActivity(mContext, permissions);} else {showToast("获取录音和日历权限失败");}}});}@Download.onWaitpublic void onWait(DownloadTask task) {Log.d(TAG, "onWait: ");}@Download.onPrepublic void onPre(DownloadTask task) {Log.d(TAG, "onPre: ");}@Download.onTaskStartpublic void onTaskStart(DownloadTask task) {Log.d(TAG, "onTaskStart: ");showToast("开始下载~~~~~");}@Download.onTaskRunningpublic void onTaskRunning(DownloadTask task) {Log.d(TAG, "onTaskRunning: ");}@Download.onTaskResumepublic void onTaskResume(DownloadTask task) {Log.d(TAG, "onTaskResume: ");}@Download.onTaskStoppublic void onTaskStop(DownloadTask task) {Log.d(TAG, "onTaskStop: ");}@Download.onTaskCancelpublic void onTaskCancel(DownloadTask task) {Log.d(TAG, "onTaskCancel: ");}@Download.onTaskFailpublic void onTaskFail(DownloadTask task, Exception e) {Log.d(TAG, "onTaskFail: ");}@Download.onTaskCompletepublic void onTaskComplete(DownloadTask task) {Log.d(TAG, "onTaskComplete: ");mBinding.download.setClickable(false);mBinding.download.setImageResource(R.mipmap.ic_download_complete);showToast("下载完成~~~~~");}private void download() {if (null != musicInfo) {Aria.download(PlayMusicActivity.this).load(musicInfo.getMusic_url()) // 下载地址.setFilePath(getExternalCacheDir().getPath() + musicInfo.getMusic_title() + ".mp3") // 设置文件保存路径.setExtendField(GsonUtils.toJson(musicInfo)).create();}}}

详情可私信哦~~~~~~