Webview 应用程序:如何在 webview 应用程序中下载文件 &外部链接应在应用程序外打开 [英] Webview app: How to download a file inside webview app & external link should open outside the app
问题描述
我想在 android webview 应用程序中下载特定文件(虽然它们来自外部链接而不是来自我的 webview 应用程序 URL)并且所有外部链接都应该在 webview 应用程序外部打开意味着手机浏览器.
I want to download specific file inside android webview app ( although they are from external link not from my webview app URL) and all external link should open outside webview app means phone browser.
我使用下面的代码来做到这一点.
I used code below to do that.
wv.setWebViewClient(new WebViewClient(){
public boolean shouldOverrideUrlLoading(WebView view, String url) {
boolean value = true;
String extension = MimeTypeMap.getFileExtensionFromUrl(url);
if (extension != null) {
MimeTypeMap mime = MimeTypeMap.getSingleton();
String mimeType = mime.getMimeTypeFromExtension(extension);
if (mimeType != null) {
if (mimeType.toLowerCase().contains("pdf")
|| extension.toLowerCase().contains("ppt")
|| extension.toLowerCase().contains("doc")
|| extension.toLowerCase().contains("rar")
|| extension.toLowerCase().contains("rtf")
|| extension.toLowerCase().contains("exe")
|| extension.toLowerCase().contains("apk")
|| extension.toLowerCase().contains("jpeg")
|| extension.toLowerCase().contains("png")
|| extension.toLowerCase().contains("xls")
|| extension.toLowerCase().contains("zip")
|| extension.toLowerCase().contains("jpg")) {
DownloadManager mdDownloadManager = (DownloadManager)getSystemService(Context.DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(
Uri.parse(url));
String name= URLUtil.guessFileName(url,null,MimeTypeMap.getFileExtensionFromUrl(url));
File destinationFile = new File(Environment.getExternalStorageDirectory(),name);
request.setDescription("Downloading...");
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
// request.setDestinationUri(Uri.fromFile(destinationFile));
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,name);
mdDownloadManager.enqueue(request);
//value = false;
}
}
if (value) {
view.loadUrl(url);
}
if (!url.contains("my site url")) { // Could be cleverer and use a regex
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
return false;
}
return false;
}
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
wv.loadUrl(mypage_error);
}
}
当我单击包含上述扩展名的任何链接时，文件会在 webview 应用程序中开始下载(没关系)，但同时该链接会自动打开到我的移动浏览器中.我知道这是因为这段代码.
When i click any link containing above extension, the file starting download inside the webview app (It's OK) but at the same time that link automatically opening into my mobile browser. I know this is happening because of this code.
if (!url.contains("my site url")) { // Could be cleverer and use a regex
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
return false;
现在，
首先解决方案我想知道如何在 webview 应用程序中下载包含上述扩展名的文件，并且所有不包含上述扩展名的链接都应该在我的 webview 应用程序之外打开，这意味着移动浏览器.
Firstly Solution I want know how can I download files containing above extension inside webview app and all link that don't contain above extension should open outside my webview app that means mobile browser.
第二种解决方案如果不可能，请告诉我，当我每次单击链接时如何显示警报/弹出窗口(浏览器选择选项).正如我提到的，而不是显示浏览器选择警报链接会自动打开到我的手机浏览器.
Secondly Solution If it is not possible then tell me, when I click the link how to show alert/popup (browser choosing option) every time. As i mentioned instead of showing browser choosing alert links are opening automatically to my phone browser.
推荐答案
public boolean shouldOverrideUrlLoading(WebView view, String url) {
boolean value = true;
String extension = MimeTypeMap.getFileExtensionFromUrl(url);
if (extension != null) {
MimeTypeMap mime = MimeTypeMap.getSingleton();
String mimeType = mime.getMimeTypeFromExtension(extension);
if (mimeType != null) {
if (mimeType.toLowerCase().contains("pdf")
|| extension.toLowerCase().contains("ppt")
|| extension.toLowerCase().contains("doc")
|| extension.toLowerCase().contains("rar")
|| extension.toLowerCase().contains("rtf")
|| extension.toLowerCase().contains("exe")
|| extension.toLowerCase().contains("apk")
|| extension.toLowerCase().contains("jpeg")
|| extension.toLowerCase().contains("png")
|| extension.toLowerCase().contains("xls")
|| extension.toLowerCase().contains("zip")
|| extension.toLowerCase().contains("jpg")) {
DownloadManager mdDownloadManager = (DownloadManager)getSystemService(Context.DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(
Uri.parse(url));
String name= URLUtil.guessFileName(url,null,MimeTypeMap.getFileExtensionFromUrl(url));
File destinationFile = new File(Environment.getExternalStorageDirectory(),name);
request.setDescription("Downloading...");
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
// request.setDestinationUri(Uri.fromFile(destinationFile));
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,name);
mdDownloadManager.enqueue(request);
//value = false;
}
}
if (value) {
view.loadUrl(url);
}
if (!url.contains("my site url")) { // Could be cleverer and use a regex
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}else{
new AlertDialog.Builder(this)
.setIcon(android.R.drawable.ic_dialog_alert)
.setTitle("Exit!")
.setMessage("Are you sure you want to close?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
})
.setNegativeButton("No", null)
.show();
}
return false;
}
return false;
}
替换正负按钮代码，随心所欲.我希望这可以回答您的用例.
Replace the positive and negative buttons code to do whatever you like. i hope this answers your use case.
这篇关于Webview 应用程序:如何在 webview 应用程序中下载文件 &外部链接应在应用程序外打开的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
