- 实现DataSourceListener 接口 如下:
默认: new DefaultCacheDataSourceFactory(context,100000000,"1234567887654321".getBytes(),eventListener);
自定义: new CacheDataSourceFactory(simpleCache, new JDefaultDataSourceFactory(context),0,4 * 1024 * 1024);
public class OfficeDataSource implements DataSourceListener {
public static final String TAG = "OfficeDataSource";
private CacheDataSource.EventListener eventListener;
private Context context;
public OfficeDataSource(Context context, CacheDataSource.EventListener eventListener) {
this.context = context;
this.eventListener = eventListener;
}
@Override
public DataSource.Factory getDataSourceFactory() {
//采用默认
return new DefaultCacheDataSourceFactory(context,100000000,"1234567887654321".getBytes(),eventListener);
//自定义配置
LeastRecentlyUsedCacheEvictor evictor = new LeastRecentlyUsedCacheEvictor(1024*1024*1024 * 1024);
SimpleCache simpleCache = new SimpleCache
//设置你缓存目录
(new File(context.getExternalCacheDir(), "media"),
//缓存驱逐器
evictor,
// 缓存文件加密,那么在使用AES / CBC的文件系统中缓存密钥将被加密 密钥必须是16字节长
//可以为空
"1234567887654321".getBytes());
//使用缓存数据源工厂类
return new CacheDataSourceFactory(simpleCache,
//设置下载数据加载工厂类
new JDefaultDataSourceFactory(context),
//设置缓存标记
0,
//最大缓存文件大小,不填写 默认2m
4 * 1024 * 1024);
}
}
1.实例化离线下载帮助类 有关类:如下
1.全文件下载使用ExoWholeDownLoadManger,ExoWholeDownloadTracker
2.常规视频质直链的文件使用,ExoDownLoadManger,DownloadTracker
ExoWholeDownLoadManger和ExoDownLoadManger使用方法一样。 ExoWholeDownLoadManger支持流媒体下载 ExoWholeDownLoadManger,内部已经集成(HlsDownloadHelper,DashDownloadHelper,SsDownloadHelper,ProgressiveDownloadHelper)。
ExoDownLoadManger只有（ProgressiveDownloadHelper）
示例代码如下:
//实例化下载管理类
ExoDownLoadManger.getSingle().initDownloadManager(this,DemoDownloadService.class);
2.实现下载乃文件Service服务
/** 下载媒体的服务. */
public class DemoDownloadService extends DownloadService {
//前台通知的通知ID。, 一定不
private static final int FOREGROUND_NOTIFICATION_ID = 1;//
//用于创建低优先级通知通道的ID，或者如果应用将根据需要创建通知通道，则为{null}。, 如果指定，则每个包必须是*唯一的，如果该值太长，则该值可能会被截断
private static final String CHANNEL_ID = "download_channel";//通知栏
//前台通知更新之间的最大间隔，以毫秒为单位。
public static final long DEFAULT_FOREGROUND_NOTIFICATION_UPDATE_INTERVAL = 1000;
private static final int JOB_ID = 1;
//则该通道的用户可见名称的字符串资源标识符。, 建议的最大长度是40个字符;, 值*可能会被截断，如果它太长
private static final int hannel_name =R.string.exo_download_notification_channel_name;
public DemoDownloadService() {
super(
FOREGROUND_NOTIFICATION_ID,
DEFAULT_FOREGROUND_NOTIFICATION_UPDATE_INTERVAL,
CHANNEL_ID,
hannel_name);
}
@Override
protected DownloadManager getDownloadManager() {
// return ((App) getApplication()).getDownloadManager();
return ExoDownLoadManger.getSingle().getDownloadManager();
}
//得到调度器
@Override
protected PlatformScheduler getScheduler() {
return Util.SDK_INT >= 21 ? new PlatformScheduler(this, JOB_ID) : null;
}
//获得前台通知
@Override
protected Notification getForegroundNotification(TaskState[] taskStates) {
return DownloadNotificationUtil.buildProgressNotification(
/* context= */ this,
R.drawable.exo_controls_play,
CHANNEL_ID,
/* contentIntent= */ null,
/* message= */ null,
taskStates);
}
/***
* 更新进度
* ***/
@Override
protected void onTaskStateChanged(TaskState taskState) {
if (taskState.action.isRemoveAction) {
return;
}
Notification notification = null;
if (taskState.state == TaskState.STATE_COMPLETED) {
notification =
DownloadNotificationUtil.buildDownloadCompletedNotification(
/* context= */ this,
R.drawable.exo_controls_play,
CHANNEL_ID,
/* contentIntent= */ null,
Util.fromUtf8Bytes(taskState.action.data));
} else if (taskState.state == TaskState.STATE_FAILED) {
notification =
DownloadNotificationUtil.buildDownloadFailedNotification(
/* context= */ this,
R.drawable.exo_controls_play,
CHANNEL_ID,
/* contentIntent= */ null,
Util.fromUtf8Bytes(taskState.action.data));
}
int notificationId = FOREGROUND_NOTIFICATION_ID + 1 + taskState.taskId;
NotificationUtil.setNotification(this, notificationId, notification);
}
}
4.开始下载文件
//得到下载跟踪器
DownloadTracker downloadTracker = ExoDownLoadManger.getSingle().getDownloadTracker();
//下载文件
downloadTracker.toggleDownload(this, getPackageName(), Uri.parse(getString(R.string.uri_test_8)), "mp4");
//是否已经下载
downloadTracker.isDownloaded(Uri.parse(getString(R.string.uri_test_8))
2.使用,自动缓存你服务器视频资源。视频还是原来传入网络视频链接,自动识别该视频有缓存文件。
//实例化播放器控制类,传入您自定义数据实例
exoPlayerManager = new GestureVideoPlayer(this, videoPlayerView,new OfficeDataSource(this,null));