下载管理器不起作用

本文介绍了下载管理器不起作用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在尝试开发显示视频的应用，您可以下载它 我正在使用Download Manager类，但没有用，也没有给我任何错误:(

这是我的下载管理器代码:

public void downloadFileFromUrl(String url, String fileName) { String filePath=Environment.getExternalStorageDirectory() + File.separator + "BlueNet"; File folder = new File(filePath); if (!folder.exists()) { folder.mkdirs(); } try { Uri downloadUri = Uri.parse(url); DownloadManager.Request request = new DownloadManager.Request(downloadUri); request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI); request.allowScanningByMediaScanner(); request.setDestinationInExternalPublicDir("/BlueNet/",fileName); request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); request.setVisibleInDownloadsUi(true); DownloadManager downloadManager = (DownloadManager)getApplicationContext().getSystemService(DOWNLOAD_SERVICE); long id= downloadManager.enqueue(request); Toast.makeText(this, fileName, Toast.LENGTH_LONG).show(); Toast.makeText(this, filePath, Toast.LENGTH_LONG).show(); } catch (Exception ex){ Toast.makeText(this, ex.toString(), Toast.LENGTH_LONG).show(); } }

这就是我的称呼方式

downloadFileFromUrl(path, fileName);

其中:

路径:"192.168.1.5:8080/BlueNet_NMC/blue_elephant.mp4"

文件名:"blue_elephant.mp4"

并且我已经将此权限授予了清单

<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

所以请帮忙

如我在评论中所述，DownloadManager仅处理以或开头的请求，如您所见 .

我不知道到底是什么问题，因为我缺少有关您服务器的信息，但是我认为这是一个常见问题，因此您应该避免在未提供该方案的情况下使用IP地址.

I'm trying to develop app that show videos and you can Download it i'm using Download Manager class but it didn't work, also it didn't give me any error :(

this is my download manager code:

public void downloadFileFromUrl(String url, String fileName) { String filePath=Environment.getExternalStorageDirectory() + File.separator + "BlueNet"; File folder = new File(filePath); if (!folder.exists()) { folder.mkdirs(); } try { Uri downloadUri = Uri.parse(url); DownloadManager.Request request = new DownloadManager.Request(downloadUri); request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI); request.allowScanningByMediaScanner(); request.setDestinationInExternalPublicDir("/BlueNet/",fileName); request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); request.setVisibleInDownloadsUi(true); DownloadManager downloadManager = (DownloadManager)getApplicationContext().getSystemService(DOWNLOAD_SERVICE); long id= downloadManager.enqueue(request); Toast.makeText(this, fileName, Toast.LENGTH_LONG).show(); Toast.makeText(this, filePath, Toast.LENGTH_LONG).show(); } catch (Exception ex){ Toast.makeText(this, ex.toString(), Toast.LENGTH_LONG).show(); } }

and this is how I'm calling it

downloadFileFromUrl(path, fileName);

where:

path: "192.168.1.5:8080/BlueNet_NMC/blue_elephant.mp4"

filename: "blue_elephant.mp4"

and i already give this permissions to manifests

<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

so please any help

解决方案

As I said in the comments, DownloadManager only handles requests starting with or as you can see in the docs.

I don't know exactly what's the problem because I lack information about your server, but I think it's a common issue, so you should avoid using an IP address without providing that scheme.