Android如何下载文件

OkDownload 进行下载

fun downloadPic(userId: String?, url: String, parentFile: File) {
    val task: DownloadTask = DownloadTask.Builder(url, parentFile)
        .setFilename(userId) // the minimal interval millisecond for callback progress
        .setMinIntervalMillisCallbackProcess(30) // do re-download even if the task has already been completed in the past.
        .setPassIfAlreadyCompleted(false)
        .build()
 // execute task synchronized
    task.execute(object : DownloadListener2() {
        override fun taskStart(task: DownloadTask) {
            LogUtils.v("FaceManager", "开始下载")
        }

        override fun taskEnd(task: DownloadTask, cause: EndCause, realCause: Exception?) {
            LogUtils.v("FaceManager", "下载结束" + task.file?.path ?: "")
           
        }
    })
}

Okgo 下载

public void downloadFile(String url, String fileName) {
    OkGo.<File>get(url)
            .tag(this)
            .execute(new FileCallback("文件路径", fileName) {
                @Override
                public void onStart(Request<File, ? extends Request> request) {
                    super.onStart(request);

                }

                @Override
                public void onSuccess(Response<File> response) {

                }

                @Override
                public void onError(Response<File> response) {
                    super.onError(response);

                }
            });
}