Comment télécharger des fichiers à partir de webview Android?

Mon code ci-dessous charges de l'url de la page d'amende et après la recherche d'un morceau lorsque je clique sur le lien de téléchargement, il se bloque. Il n'y a pas beaucoup de tutoriels sur la façon d'obtenir le manager de téléchargement de travailler avec une webview. Ce que je fais mal?

import java.io.File;
import android.app.Activity;
import android.app.DownloadManager;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class List1 extends Activity {
WebView ourBrow;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Use a custom layout file
setContentView(R.layout.list1);
final DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
final File destinationDir = new File (Environment.getExternalStorageDirectory(), getPackageName());
if (!destinationDir.exists()) {
destinationDir.mkdir(); //Don't forget to make the directory if it's not there
}
ourBrow = (WebView) findViewById(R.id.wvBrowser);
ourBrow.getSettings().setJavaScriptEnabled(true);
ourBrow.setInitialScale(50); 
ourBrow.getSettings().setUseWideViewPort(true); 
ourBrow.setVerticalScrollBarEnabled(false);
ourBrow.setHorizontalScrollBarEnabled(false);
ourBrow.loadUrl("http://www.degjo.com");
ourBrow.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading (WebView view, String url) {
boolean shouldOverride = false;
//We only want to handle requests for mp3 files, everything else the webview
//can handle normally
if (url.endsWith(".mp3")) {
shouldOverride = true;
Uri source = Uri.parse(url);
//Make a new request pointing to the mp3 url
DownloadManager.Request request = new DownloadManager.Request(source);
//Use the same file name for the destination
File destinationFile = new File (destinationDir, source.getLastPathSegment());
request.setDestinationUri(Uri.fromFile(destinationFile));
//Add it to the manager
manager.enqueue(request);
}
return shouldOverride;
}
});
}
}

LogCat

02-18 19:45:44.891: E/AndroidRuntime(357):  at android.content.ContentProviderProxy.insert(ContentProviderNative.java:408)
02-18 19:45:44.891: E/AndroidRuntime(357):  at android.content.ContentResolver.insert(ContentResolver.java:604)
02-18 19:45:44.891: E/AndroidRuntime(357):  at android.app.DownloadManager.enqueue(DownloadManager.java:750)
02-18 19:45:44.891: E/AndroidRuntime(357):  at com.example.androidbuttonsactivities.List1$1.shouldOverrideUrlLoading(List1.java:78)
02-18 19:45:44.891: E/AndroidRuntime(357):  at android.webkit.CallbackProxy.uiOverrideUrlLoading(CallbackProxy.java:216)
02-18 19:45:44.891: E/AndroidRuntime(357):  at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:323)
02-18 19:45:44.891: E/AndroidRuntime(357):  at android.os.Handler.dispatchMessage(Handler.java:99)
02-18 19:45:44.891: E/AndroidRuntime(357):  at android.os.Looper.loop(Looper.java:123)
02-18 19:45:44.891: E/AndroidRuntime(357):  at android.app.ActivityThread.main(ActivityThread.java:3683)
02-18 19:45:44.891: E/AndroidRuntime(357):  at java.lang.reflect.Method.invokeNative(Native Method)
02-18 19:45:44.891: E/AndroidRuntime(357):  at java.lang.reflect.Method.invoke(Method.java:507)
02-18 19:45:44.891: E/AndroidRuntime(357):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-18 19:45:44.891: E/AndroidRuntime(357):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-18 19:45:44.891: E/AndroidRuntime(357):  at dalvik.system.NativeStart.main(Native Method)
02-18 19:45:48.401: I/Process(357): Sending signal. PID: 357 SIG: 9

source d'informationauteur Dritan Berna | 2014-02-18

Elle peut être dépend de l'android de version du problème, le code ci-dessous va travailler avec succès sur 2,3+ construit, check this out,

ourBrow.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
Log.d("WEB_VIEW_TEST", "error code:" + errorCode + " - " + description);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
//handle different requests for different type of files
//this example handles downloads requests for .apk and .mp3 files
//everything else the webview can handle normally
if (url.endsWith(".apk")) {
Uri source = Uri.parse(url);
//Make a new request pointing to the .apk url
DownloadManager.Request request = new DownloadManager.Request(source);
//appears the same in Notification bar while downloading
request.setDescription("Description for the DownloadManager Bar");
request.setTitle("YourApp.apk");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
}
//save the file in the "Downloads" folder of SDCARD
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "SmartPigs.apk");
//get download service and enqueue file
DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
manager.enqueue(request);
}
else if(url.endsWith(".mp3")) {
//if the link points to an .mp3 resource do something else
}
//if there is a link to anything else than .apk or .mp3 load the URL in the webview
else view.loadUrl(url);
return true;                
}
});

A ajouter DownloadManager Autorisation dans votre fichier manifest?

<uses-permission android:name="android.permission.ACCESS_DOWNLOAD_MANAGER"/>

-----EDIT-----

Je suis la copie de certains extrait de code pour votre référence à partir du navigateur par défaut d'Android sur le démarrage d'une tâche de téléchargement:

import android.net.WebAddress;
//java.net.URI is a lot stricter than KURL so we have to encode some
//extra characters. Fix for b 2538060 and b 1634719
WebAddress webAddress;
try {
webAddress = new WebAddress(url);
webAddress.setPath(encodePath(webAddress.getPath()));
} catch (Exception e) {
//This only happens for very bad urls, we want to chatch the
//exception here
Log.e(LOGTAG, "Exception trying to parse url:" + url);
return;
}
String addressString = webAddress.toString();
Uri uri = Uri.parse(addressString);
final DownloadManager.Request request;
try {
request = new DownloadManager.Request(uri);
} catch (IllegalArgumentException e) {
Toast.makeText(activity, R.string.cannot_download, Toast.LENGTH_SHORT).show();
return;
}
request.setMimeType(mimetype);
//set downloaded file destination to /sdcard/Download.
//or, should it be set to one of several Environment.DIRECTORY* dirs depending on mimetype?
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, filename);
//let this downloaded file be scanned by MediaScanner - so that it can 
//show up in Gallery app, for example.
request.allowScanningByMediaScanner();
request.setDescription(webAddress.getHost());
//XXX: Have to use the old url since the cookies were stored using the
//old percent-encoded url.
String cookies = CookieManager.getInstance().getCookie(url, privateBrowsing);
request.addRequestHeader("cookie", cookies);
request.addRequestHeader("User-Agent", userAgent);
request.addRequestHeader("Referer", referer);
request.setNotificationVisibility(
DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
if (mimetype == null) {
if (TextUtils.isEmpty(addressString)) {
return;
}
//We must have long pressed on a link or image to download it. We
//are not sure of the mimetype in this case, so do a head request
new FetchUrlMimeType(activity, request, addressString, cookies,
userAgent).start();
} else {
final DownloadManager manager
= (DownloadManager) activity.getSystemService(Context.DOWNLOAD_SERVICE);
new Thread("Browser download") {
public void run() {
manager.enqueue(request);
}
}.start();
}
Toast.makeText(activity, R.string.download_pending, Toast.LENGTH_SHORT)
.show();

essayer

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();
}
});

Aussi n'oubliez pas d'ajouter le code ci-dessous à l'manifest.xml fichier,il est très important cela va lui donner l'autorisation pour enregistrer de stockage juste comme Internet l'autorisation pour la weview.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

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