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Android实现下载m3u8视频文件问题解决
来源：jb51　　时间：2023/1/30 15:19:43　　对本文有异议

效果图

简介

Aria

下载器采用开源框架Aria

github

中文文档

导入Aria

   implementation 'me.laoyuyu.aria:core:3.8.16'
    annotationProcessor 'me.laoyuyu.aria:compiler:3.8.16'
    implementation 'me.laoyuyu.aria:m3u8:3.8.16'

介绍

service在Appliaction中启动，即启动app即启动service并且service只启动一次，后序通过单例binder去调用服务

启动Service

在Application中默认启动Service

  1. private void bindService(){
  2.         DownloadService.bindService(this, new ServiceConnection() {
  3.             @Override
  4.             public void onServiceConnected(ComponentName name, IBinder service) {
  5.             }
  6.             @Override
  7.             public void onServiceDisconnected(ComponentName name) {
  8.                 downloadService = null;
  9.             }
  10.         });
  11.     }

DownloadService

用于Aplication调用起服务

  1. public static void bindService(Context context, ServiceConnection connection){
  2.         Intent intent = new Intent(context, DownloadService.class);
  3.         context.bindService(intent, connection, Service.BIND_AUTO_CREATE);
  4.     }

注册下载器

  1. @Override
  2.     public void onCreate() {
  3.         super.onCreate();
  4.         Aria.download(this).register();
  5.         Log.d("DownloadService","create service");
  6.     }

若上次有未下载完成的视频，则恢复下载，并将binder赋给另一个单例binder，后续使用binder进行具体下载事项

  1. @Nullable
  2.     @Override
  3.     public IBinder onBind(Intent intent) {
  4.         Log.d("DownloadService","bind service");
  5.         long taskId = (long)SP.getInstance().GetData(BaseApplication.getContext(),"lastDownloadID",0L);
  6.         if (taskId != 0L){
  7.             List<DownloadEntity> entityList = Aria.download(this).getAllNotCompleteTask();
  8.             if (entityList != null){
  9.                 HttpNormalTarget target = Aria.download(this).load(taskId);
  10.                 if (target.getTaskState() != STATE_COMPLETE){
  11.                     target.m3u8VodOption(DownloadBinder.getInstance().getOption());
  12.                     target.resume();
  13.                     Log.d("DownloadService","resume download");
  14.                 } else {
  15.                     HttpNormalTarget resume =  Aria.download(this).load( entityList.get(0).getId());
  16.                     resume.m3u8VodOption(DownloadBinder.getInstance().getOption());
  17.                     if ((resume.getTaskState() == STATE_FAIL) || (resume.getTaskState() == STATE_OTHER)){
  18.                         resume.resetState();
  19.                         Log.d("DownloadService","resetState");
  20.                     }else {
  21.                         resume.resume();
  22.                         Log.d("DownloadService","resumeState");
  23.                     }
  24.                 }
  25.             }
  26.         }
  27.         return DownloadBinder.getInstance();
  28.     }

注销aria下载器和解除binder绑定

  1.  @Override
  2.     public boolean onUnbind(Intent intent) {
  3.         Log.d("DownloadService","unbind service");
  4.         return super.onUnbind(intent);
  5.     }
  6.     @Override
  7.     public void onDestroy() {
  8.         super.onDestroy();
  9.         Aria.download(this).unRegister();
  10.         Log.d("DownloadService","service onDestroy");
  11.     }

下载回调

然后将Aria下载器的回调在进行一次中转，回调至单例binder，后面在下载就不需要binder服务，直接调用单例binder即可

  1.     @Download.onNoSupportBreakPoint public void onNoSupportBreakPoint(DownloadTask task) {
  2.         Log.d("DownloadService","该下载链接不支持断点");
  3.        // DownloadBinder.getInstance().onTaskStart(task);
  4.     }
  5.     @Download.onTaskStart public void onTaskStart(DownloadTask task) {
  6.         Log.d("DownloadService",task.getDownloadEntity().getFileName() +":开始下载");
  7.         DownloadBinder.getInstance().onTaskStart(task);
  8.     }
  9.     @Download.onTaskStop public void onTaskStop(DownloadTask task) {
  10.         Log.d("DownloadService",task.getDownloadEntity().getFileName() +":停止下载");
  11.         DownloadBinder.getInstance().onTaskStop(task);
  12.     }
  13.     @Download.onTaskCancel public void onTaskCancel(DownloadTask task) {
  14.         Log.d("DownloadService",task.getDownloadEntity().getFileName() +":取消下载");
  15.         DownloadBinder.getInstance().onTaskCancel(task);
  16.     }
  17.     @Download.onTaskFail public void onTaskFail(DownloadTask task) {
  18.         Log.d("DownloadService",task.getDownloadEntity().getFileName() +":下载失败");
  19.         DownloadBinder.getInstance().onTaskFail(task);
  20.     }
  21.     @Download.onTaskComplete public void onTaskComplete(DownloadTask task) {
  22.         Log.d("DownloadService",task.getDownloadEntity().getFileName() +":下载完成");
  23.         DownloadBinder.getInstance().onTaskComplete(task);
  24.     }
  25.     /**
  26.      * @param e 异常信息
  27.      */
  28.     @Download.onTaskFail void taskFail(DownloadTask task, Exception e) {
  29.         try {
  30.             DownloadBinder.getInstance().taskFail(task,e);
  31.             ALog.d("DownloadService", task.getDownloadEntity().getFileName() +"error:"+ALog.getExceptionString(e));
  32.         }catch (Exception ee){
  33.             ee.printStackTrace();
  34.         }
  35.     }
  36.     @Download.onTaskRunning public void onTaskRunning(DownloadTask task) {
  37.         Log.d("DownloadService","pre = "+task.getPercent()+"   "+"speed = "+ task.getConvertSpeed());
  38.         DownloadBinder.getInstance().onTaskRunning(task);
  39.     }
  40. }

回调接口

将服务中的Aria回调，回调至单例binder中

  1. public interface ServiceCallback {
  2.     void onTaskStart(DownloadTask task);
  3.     void onTaskStop(DownloadTask task);
  4.     void onTaskCancel(DownloadTask task);
  5.     void onTaskFail(DownloadTask task);
  6.     void onTaskComplete(DownloadTask task);
  7.     void onTaskRunning(DownloadTask task);
  8.     void taskFail(DownloadTask task, Exception e);
  9. }

单例Binder

构造单例

  1. public class DownloadBinder extends Binder implements ServiceCallback {
  2.  private static DownloadBinder binder;
  3.     private DownloadBinder() {
  4.     }
  5.     public static DownloadBinder getInstance() {
  6.         if (binder == null) {
  7.             binder = new DownloadBinder();
  8.             downloadReceiver = Aria.download(BaseApplication.getContext());
  9.         }
  10.         return binder;
  11.     }

下载

将下载信息传入，并以视频type+id+name等构件下载文件夹名称，确保唯一性，然后通过配置Aria Option，使其切换至m3u8文件下载模式，具体配置文件还可配置下载速度、最大下载文件数量、线程数等等。

Aria自带数据库，可通过其数据库保存一些数据，但读取数据较慢

  1.     public void startDownload(DownloadBean downloadBean) {
  2.         if (downloadBean == null) return;
  3.         String locationDir = FileUtils.getInstance().mainCatalogue();
  4.         String name = downloadBean.getVideoType()+downloadBean.gettId() + downloadBean.getsId() + downloadBean.geteId();
  5.         String subFile = FileUtils.getInstance().createFile(locationDir, name);
  6.         String path = subFile + File.separator + name + ".m3u8";
  7.         Log.d("DownloadService", "start download");
  8.         boolean isExist = IsExist(path);
  9.         if (isExist) {
  10.             Log.d("DownloadService", "exist same item");
  11.             if (repeatTaskId != 0) {
  12.                 if (Aria.download(this).load(repeatTaskId).getTaskState() != STATE_RUNNING) {
  13.                     if (downloadReceiver.load(repeatTaskId).getEntity().getRealUrl().equals(downloadBean.getVideoUrl())) {
  14.                         downloadReceiver.load(repeatTaskId).m3u8VodOption(DownloadBinder.getInstance().getOption());
  15.                         downloadReceiver.load(repeatTaskId).resume();
  16.                     } else {
  17.                         downloadReceiver.load(repeatTaskId).m3u8VodOption(DownloadBinder.getInstance().getOption());
  18.                         downloadReceiver.load(repeatTaskId).updateUrl(downloadBean.getVideoUrl()).resume();
  19.                     }
  20.                 }
  21.                 Log.d("DownloadService", "resume exist same item");
  22.                 return;
  23.             }
  24.         }
  25.         HttpBuilderTarget target = downloadReceiver.load(downloadBean.getVideoUrl())
  26.                 .setFilePath(path)
  27.                 .ignoreFilePathOccupy()
  28.                 .m3u8VodOption(getOption());
  29.         List<DownloadEntity> downloadEntityList = downloadReceiver.getDRunningTask();
  30.         if (downloadEntityList == null) {
  31.             repeatTaskId = target.create();
  32.         } else {
  33.             repeatTaskId = target.add();
  34.         }
  35.         try {
  36.             repeatTaskId = target.getEntity().getId();
  37.             downloadBean.setTaskId(repeatTaskId);
  38.             SP.getInstance().PutData(BaseApplication.getContext(),"lastDownloadID",repeatTaskId);
  39.             target.setExtendField(new Gson().toJson(downloadBean)).getEntity().save();
  40.         }catch (NullPointerException e){
  41.             e.printStackTrace();
  42.         }
  43.     }

辐射

再一次将service回调的接口回调至binder的接口，通过EventBus辐射至外部，通过一层层封装，在外部监听当前文件下载状态，只需通过监听EventBus事件即可

  1.  /**
  2.      * download status
  3.      * 0:prepare
  4.      * 1:starting
  5.      * 2:pause
  6.      * 3:cancel
  7.      * 4:failed
  8.      * 5:completed
  9.      * 6:running
  10.      * 7:exception*/
  11.     @Override
  12.     public void onTaskStart(DownloadTask task) {
  13.         EventBus.getDefault().postSticky(new DownloadStatusBean(1,task.getDownloadEntity().getId(), task.getConvertSpeed(), task.getPercent(),task.getConvertFileSize(),task.getFilePath()));
  14.     }
  15.     @Override
  16.     public void onTaskStop(DownloadTask task) {
  17.         EventBus.getDefault().postSticky(new DownloadStatusBean(2,task.getDownloadEntity().getId(), task.getConvertSpeed(), task.getPercent(),task.getConvertFileSize(),task.getFilePath()));
  18.     }
  19.     @Override
  20.     public void onTaskCancel(DownloadTask task) {
  21.         EventBus.getDefault().postSticky(new DownloadStatusBean(3,task.getDownloadEntity().getId(), task.getConvertSpeed(), task.getPercent(),task.getConvertFileSize(),task.getFilePath()));
  22.     }
  23.     @Override
  24.     public void onTaskFail(DownloadTask task) {
  25.         EventBus.getDefault().postSticky(new DownloadStatusBean(4,task.getDownloadEntity().getId(), task.getConvertSpeed(), task.getPercent(),task.getConvertFileSize(),task.getFilePath()));
  26.     }
  27.     @Override
  28.     public void onTaskComplete(DownloadTask task) {
  29.         EventBus.getDefault().postSticky(new DownloadStatusBean(5,task.getDownloadEntity().getId(), task.getConvertSpeed(), task.getPercent(),task.getConvertFileSize(),task.getFilePath()));
  30.     }
  31.     @Override
  32.     public void onTaskRunning(DownloadTask task) {
  33.         EventBus.getDefault().postSticky(new DownloadStatusBean(6,task.getDownloadEntity().getId(), task.getConvertSpeed(), task.getPercent(),task.getConvertFileSize(),task.getFilePath()));
  34.     }
  35.     @Override
  36.     public void taskFail(DownloadTask task, Exception e) {
  37.         try {
  38.             EventBus.getDefault().postSticky(new DownloadStatusBean(4,task.getDownloadEntity().getId(), task.getConvertSpeed(), task.getPercent(),task.getConvertFileSize(),task.getFilePath()));
  39.         }catch (NullPointerException ee){
  40.             ee.printStackTrace();
  41.         }
  42.     }
  43. }

创建下载实例

一句话我们就可以实现视频下载，然后后天服务自动回调给binder,然后binder回调给EventBus

  1.  DownloadBean bean = new DownloadBean(0L,m_id,"","",sourceBean.getLink(),detailBean.getCover(),detailBean.getTitle(),"","","movie","",0);
  2.   DownloadBinder.getInstance().startDownload(bean);

监听下载状态

然后只需要在需要更新界面的地方注册EventBus即可，通过封装，不同的类做不同的事情，将数据处理和UI更新进行隔离，可以提高代码阅读和执行效率

  1.  /**
  2.      * download status
  3.      * 0:prepare
  4.      * 1:starting
  5.      * 2:pause
  6.      * 3:cancel
  7.      * 4:failed
  8.      * 5:completed
  9.      * 6:running
  10.      * 7:exception*/
  11.     /**
  12.      * 下载item状态监听*/
  13.     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
  14.     public void OnEvent(DownloadStatusBean bean) {
  15.         taskID = bean.getTaskID();
  16.         switch (bean.getStatus()) {
  17.             case 1:
  18.                 getRunningItem();
  19.                 Log.d("DownloadService", "status start");
  20.                 break;
  21.             case 2:
  22.                 updateStatus(bean);
  23.                 Log.d("DownloadService", "status pause");
  24.                 break;
  25.             case 3:
  26.                 if ((index == -1) && (beanList.size() > 0)){
  27.                     index = 0;
  28.                 }
  29.                 Log.d("DownloadService", "status cancel"+bean.getTaskID());
  30.                 break;
  31.             case 4:
  32.                 //update url
  33.                 failCount++;
  34.                 if (failCount >= 3){
  35.                     failedReconnect(bean);
  36.                     failCount = 0;
  37.                     isRunning = true;
  38.                     Log.d("DownloadService", "status fail in");
  39.                 }
  40.                 Log.d("DownloadService", "status fail");
  41.                 break;
  42.             case 5:
  43.                 removeDownloadBead(bean.getTaskID());
  44.                 startDownload();
  45.                 Log.d("DownloadService", "status complete");
  46.                 break;
  47.             case 6:
  48.                 if (isRunning) {
  49.                     getRunningItem();
  50.                 }
  51.                 updateCurItem(bean);
  52.                 Log.d("DownloadService", "status running: "+index);
  53.                 break;
  54.         }
  55.     }

到此这篇关于Android实现下载m3u8视频文件问题解决的文章就介绍到这了,更多相关Android下载m3u8视频内容请搜索w3xue以前的文章或继续浏览下面的相关文章希望大家以后多多支持w3xue！

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