在Dialog或DialogFragment中使用

例子

public class DownloadDialog extends AbsDialog implements View.OnClickListener {
  private HorizontalProgressBarWithNumber mPb;
  private Button mStart;
  private Button mCancel;
  private TextView mSize;
  private TextView mSpeed;
  private long mTaskId = -1;

  private static final String DOWNLOAD_URL =
      "http://static.gaoshouyou.com/d/4b/d7/e04b308d9cd7f0ad4cac18d1a514544c.apk";

  public DownloadDialog(Context context) {
    super(context);
    init();
  }

  @Override protected int setLayoutId() {
    return R.layout.dialog_download;
  }

  private void init() {
    Aria.download(this).register();
    mPb = findViewById(R.id.progressBar);
    mStart = findViewById(R.id.start);
    mCancel = findViewById(R.id.cancel);
    mSize = findViewById(R.id.size);
    mSpeed = findViewById(R.id.speed);
    DownloadEntity entity = Aria.download(this).getFirstDownloadEntity(DOWNLOAD_URL);
    if (entity != null) {
      mSize.setText(CommonUtil.formatFileSize(entity.getFileSize()));
      int p = (int) (entity.getCurrentProgress() * 100 / entity.getFileSize());
      mPb.setProgress(p);
      int state = entity.getState();
      setBtState(state != DownloadEntity.STATE_RUNNING);
      mTaskId = entity.getId();
    } else {
      setBtState(true);
    }
    mStart.setOnClickListener(this);
    mCancel.setOnClickListener(this);
  }

  @Override
  public void onClick(View view) {
    switch (view.getId()) {
      case R.id.start:
        if (mTaskId == -1) {
          mTaskId = Aria.download(this)
              .load(DOWNLOAD_URL)
              .setFilePath(Environment.getExternalStorageDirectory().getPath() + "/飞机大战.apk")
              .create();
          mStart.setText(getContext().getString(R.string.stop));
          break;
        }
        if (Aria.download(this).load(mTaskId).isRunning()) {
          Aria.download(this).load(mTaskId).stop();
          mStart.setText(getContext().getString(R.string.resume));
        } else {
          Aria.download(this).load(mTaskId).resume();
          mStart.setText(getContext().getString(R.string.stop));
        }
        break;

      case R.id.cancel:
        Aria.download(this).load(mTaskId).cancel();
        mTaskId = -1;
        mStart.setText(getContext().getString(R.string.start));
        break;
    }
  }

  @Download.onTaskPre public void onTaskPre(DownloadTask task) {
    mSize.setText(CommonUtil.formatFileSize(task.getFileSize()));
    setBtState(false);
  }

  @Download.onTaskStop public void onTaskStop(DownloadTask task) {
    setBtState(true);
    mSpeed.setText(task.getConvertSpeed());
  }

  @Download.onTaskCancel public void onTaskCancel(DownloadTask task) {
    setBtState(true);
    mPb.setProgress(0);
    mSpeed.setText(task.getConvertSpeed());
  }

  @Download.onTaskRunning public void onTaskRunning(DownloadTask task) {
    if (task.getKey().equals(DOWNLOAD_URL)) {
      mPb.setProgress(task.getPercent());
      mSpeed.setText(task.getConvertSpeed());
    }
  }

  @Override protected void dataCallback(int result, Object obj) {

  }

  private void setBtState(boolean startEnable) {
    mStart.setEnabled(startEnable);
    mCancel.setEnabled(!startEnable);
  }
}

如上，如果你已经对Dialog对象设置了OnDismissListener或OnCancelListener事件，那么Aria将无法跟踪Dialog的生命周期；
这时你需要在Dialog的Dismiss手动取消Aria的注册

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