new AjaxCallBack<File>() onLoading方法不执行,只执行onSuccess方法,什么问题?

[codingpp]

public void onLoading(long count,long current){};
public void onSuccess(T t){};
public void onFailure(Throwable t,int errorNo ,String strMsg){};

[bacy]

你是下载方法吗？文件有多大？

[javaDashuaiAndroid]

dHttp.download(
"http://yinyueshiting.baidu.com/data2/music/124383790/124380645248400128.mp3?xcode=2f36611e0d3ba556dd6ee9dbca2422d52f7167fd0a01384c",
DFileUtil.getExternalStorageDirectory() + "/congcongnanian.mp3",
new AjaxCallBack() {

                public void onSuccess(File t) {

                    Toast.makeText(DHttpActivity.this,
                            "歌曲下载完成，路径是" + t.getAbsolutePath(),
                            Toast.LENGTH_SHORT).show();
                };

                public void onLoading(long count, long current) {

                    textView.setText("正在下载： "
                            + (int) (((float) (current * 1.0) / count * 1.0) * 100)
                            + " %");

                };

                public void onFailure(Throwable t, int errorNo,
                        String strMsg) {

                    t.printStackTrace();

                    Toast.makeText(DHttpActivity.this, "歌曲下载失败",
                            Toast.LENGTH_SHORT).show();
                };

            }.progress(true, 1000));

.progress(true, 1000));