在Service中使用

例子

public class DownloadService extends Service {
  private static final String DOWNLOAD_URL =
      "http://rs.0.gaoshouyou.com/d/df/db/03df9eab61dbc48a5939f671f05f1cdf.apk";
  private DownloadNotification mNotify;

  @Nullable @Override public IBinder onBind(Intent intent) {
    return null;
  }

  @Override public int onStartCommand(Intent intent, int flags, int startId) {
    return super.onStartCommand(intent, flags, startId);
  }

  @Override public void onCreate() {
    super.onCreate();
    mNotify = new DownloadNotification(getApplicationContext());
    Aria.download(this).register();
    Aria.download(this)
        .load(DOWNLOAD_URL)
        .setFilePath(Environment.getExternalStorageDirectory().getPath() + "/service_task.apk")
        .start();
  }

  @Override public void onDestroy() {
    super.onDestroy();
    Aria.download(this).unRegister();
  }

  @Download.onNoSupportBreakPoint public void onNoSupportBreakPoint(DownloadTask task) {
    T.showShort(getApplicationContext(), "该下载链接不支持断点");
  }

  @Download.onTaskStart public void onTaskStart(DownloadTask task) {
    T.showShort(getApplicationContext(), task.getDownloadEntity().getFileName() + "，开始下载");
  }

  @Download.onTaskStop public void onTaskStop(DownloadTask task) {
    T.showShort(getApplicationContext(), task.getDownloadEntity().getFileName() + "，停止下载");
  }

  @Download.onTaskCancel public void onTaskCancel(DownloadTask task) {
    T.showShort(getApplicationContext(), task.getDownloadEntity().getFileName() + "，取消下载");
  }

  @Download.onTaskFail public void onTaskFail(DownloadTask task) {
    T.showShort(getApplicationContext(), task.getDownloadEntity().getFileName() + "，下载失败");
  }

  @Download.onTaskComplete public void onTaskComplete(DownloadTask task) {
    T.showShort(getApplicationContext(), task.getDownloadEntity().getFileName() + "，下载完成");
    mNotify.upload(100);
  }

  @Download.onTaskRunning public void onTaskRunning(DownloadTask task) {
    long len = task.getFileSize();
    int p = (int) (task.getCurrentProgress() * 100 / len);
    mNotify.upload(p);
  }
}