Android 在 WebView 中下载文件
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Download file inside WebView
提问by Jay Mayu
I have a webview in my Android Application. When user goes to webview and click a link to download a file nothing happens.
我的 Android 应用程序中有一个 webview。当用户转到 webview 并单击链接下载文件时，没有任何反应。
URL = "my url";
mWebView = (WebView) findViewById(R.id.webview);
mWebView.setWebViewClient(new HelloWebViewClient());
mWebView.getSettings().setDefaultZoom(ZoomDensity.FAR);
mWebView.loadUrl(URL);
Log.v("TheURL", URL);
How to enable download inside a webview? If I disable webview and enable the intent to load the URL on browser from application then download works seamlessly.
如何在 webview 中启用下载？如果我禁用 webview 并启用从应用程序加载浏览器上的 URL 的意图，那么下载将无缝工作。
String url = "my url";
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
Can someone help me out here? The page loads without issue but the link to a image file in the HTML page is not working...
有人可以帮我吗？页面加载没有问题，但指向 HTML 页面中图像文件的链接不起作用...
回答by user370305
Have you tried?
你有没有尝试过？
mWebView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
}
});
Example Link: Webview File Download- Thanks @c49
示例链接：Webview 文件下载- 谢谢@c49
回答by Sai Z
Try this out. After going through a lot of posts and forums, I found this.
试试这个。在浏览了很多帖子和论坛后，我发现了这一点。
mWebView.setDownloadListener(new DownloadListener() {
@Override
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(
Uri.parse(url));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); //Notify client once download is completed!
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "Name of your downloadble file goes here, example: Mathematics II ");
DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
dm.enqueue(request);
Toast.makeText(getApplicationContext(), "Downloading File", //To notify the Client that the file is being downloaded
Toast.LENGTH_LONG).show();
}
});
Do not forget to give this permission! This is very important! Add this in your Manifest file(The AndroidManifest.xml file)
不要忘记授予此权限！这是非常重要的！将此添加到您的清单文件（AndroidManifest.xml 文件）中
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <!-- for your file, say a pdf to work -->
Hope this helps. Cheers :)
希望这可以帮助。干杯:)
回答by Kulasekar
mwebView.setDownloadListener(new DownloadListener()
{
@Override
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimeType,
long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(
Uri.parse(url));
request.setMimeType(mimeType);
String cookies = CookieManager.getInstance().getCookie(url);
request.addRequestHeader("cookie", cookies);
request.addRequestHeader("User-Agent", userAgent);
request.setDescription("Downloading file...");
request.setTitle(URLUtil.guessFileName(url, contentDisposition,
mimeType));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(
Environment.DIRECTORY_DOWNLOADS, URLUtil.guessFileName(
url, contentDisposition, mimeType));
DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
dm.enqueue(request);
Toast.makeText(getApplicationContext(), "Downloading File",
Toast.LENGTH_LONG).show();
}});
回答by George Mavrogenis
Try using download manager, which can help you download everything you want and save you time.
尝试使用下载管理器，它可以帮助您下载所需的一切并节省您的时间。
Check those to options:
检查这些选项：
Option 1 ->
选项 1 ->
mWebView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
Request request = new Request(
Uri.parse(url));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "download");
DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
dm.enqueue(request);
}
});
Option 2 ->
选项 2 ->
if(mWebview.getUrl().contains(".mp3") {
Request request = new Request(
Uri.parse(url));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "download");
// You can change the name of the downloads, by changing "download" to everything you want, such as the mWebview title...
DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
dm.enqueue(request);
}
