如何接入只使用下载安装功能

[willsame]

如题，我这边已经有接口能获取到下载的URL地址，如何只使用您的下载，下载进度条和状态栏下载进度条的功能了？看了 您写的java.md文档，虽然可以自定义接口和实现HttpManager，但没太看明白怎么使用，感觉不太好接入，求解答，非常感谢。

[WVector]

       UpdateAppBean updateAppBean = new UpdateAppBean();

        //设置 apk 的下载地址
        updateAppBean.setApkFileUrl("https://raw.githubusercontent.com/WVector/AppUpdateDemo/master/apk/app-debug.apk");

        String path = "";
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED) || !Environment.isExternalStorageRemovable()) {
            try {
                path = getExternalCacheDir().getAbsolutePath();
            } catch (Exception e) {
                e.printStackTrace();
            }
            if (TextUtils.isEmpty(path)) {
                path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath();
            }
        } else {
            path = getCacheDir().getAbsolutePath();
        }

        //设置apk 的保存路径
        updateAppBean.setTargetPath(path);
        //实现网络接口，只实现下载就可以
        updateAppBean.setHttpManager(new UpdateAppHttpUtil());

        UpdateAppManager.download(this, updateAppBean, new DownloadService.DownloadCallback() {
            @Override
            public void onStart() {
                HProgressDialogUtils.showHorizontalProgressDialog(JavaActivity.this, "下载进度", false);
                Log.d(TAG, "onStart() called");
            }

            @Override
            public void onProgress(float progress, long totalSize) {
                HProgressDialogUtils.setProgress(Math.round(progress * 100));
                Log.d(TAG, "onProgress() called with: progress = [" + progress + "], totalSize = [" + totalSize + "]");

            }

            @Override
            public void setMax(long totalSize) {
                Log.d(TAG, "setMax() called with: totalSize = [" + totalSize + "]");
            }

            @Override
            public boolean onFinish(File file) {
                HProgressDialogUtils.cancel();
                Log.d(TAG, "onFinish() called with: file = [" + file.getAbsolutePath() + "]");
                return true;
            }

            @Override
            public void onError(String msg) {
                HProgressDialogUtils.cancel();
                Log.e(TAG, "onError() called with: msg = [" + msg + "]");
            }

            @Override
            public boolean onInstallAppAndAppOnForeground(File file) {
                Log.d(TAG, "onInstallAppAndAppOnForeground() called with: file = [" + file + "]");
                return false;
            }
        });