Allow bluetooth:// URLs to be parsed by java.net.URL.

Sets a stream handler in FDroidApp which understands bluetooth://
URLs and returns a non-functioning URL handler for such URLs.
The reason it is  non-funcitoning is because the openConnection()
function is not being used by the BluetoothDownloader at this point.

In the absense of this, a MalformedURLException is thrown.

The bluetooth stuff is still broken, but it is not broken in
this way any more.

F-Droid/src/org/fdroid/fdroid/FDroidApp.java

@@ -33,6 +33,7 @@ import android.content.res.Configuration;
 import android.net.Uri;
 import android.os.Build;
 import android.preference.PreferenceManager;
+import android.text.TextUtils;
 import android.widget.Toast;
 
 import com.nostra13.universalimageloader.cache.disc.impl.LimitedAgeDiskCache;
@@ -50,9 +51,14 @@ import org.fdroid.fdroid.net.IconDownloader;
 import org.fdroid.fdroid.net.WifiStateChangeService;
 
 import java.io.File;
+import java.net.URL;
+import java.net.URLStreamHandler;
+import java.net.URLStreamHandlerFactory;
 import java.security.Security;
 import java.util.Locale;
 
+import sun.net.www.protocol.bluetooth.Handler;
+
 public class FDroidApp extends Application {
 
     // for the local repo on this device, all static since there is only one
@@ -173,6 +179,16 @@ public class FDroidApp extends Application {
             }
         });
 
+        // This is added so that the bluetooth:// scheme we use for URLs the BluetoothDownloader
+        // understands is not treated as invalid by the java.net.URL class. The actual Handler does
+        // nothing, but its presence is enough.
+        URL.setURLStreamHandlerFactory(new URLStreamHandlerFactory() {
+            @Override
+            public URLStreamHandler createURLStreamHandler(String protocol) {
+                return TextUtils.equals(protocol, "bluetooth") ? new Handler() : null;
+            }
+        });
+
         // Clear cached apk files. We used to just remove them after they'd
         // been installed, but this causes problems for proprietary gapps
         // users since the introduction of verification (on pre-4.2 Android),

F-Droid/src/org/fdroid/fdroid/RepoUpdater.java

@@ -70,7 +70,7 @@ public class RepoUpdater {
 
     public List<Apk> getApks() { return apks; }
 
-    protected URL getIndexAddress() throws MalformedURLException {
+    private URL getIndexAddress() throws MalformedURLException {
         String urlString = repo.address + "/index.jar";
         try {
             String versionName = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionName;

F-Droid/src/org/fdroid/fdroid/localrepo/SwapService.java

@@ -63,6 +63,7 @@ import java.util.TimerTask;
  *
  * TODO: Show "Waiting for other device to finish setting up swap" when only F-Droid shown in swap
  * TODO: Handle "not connected to wifi" more gracefully. For example, Bonjour discovery falls over.
+ * TODO: When unable to reach the swap repo, but viewing apps to swap, show relevant feedback when attempting to download and install.
  * TODO: Remove peers from list of peers when no longer "visible".
  * TODO: Feedback for "Setting up (wifi|bluetooth)" in start swap view is not as immediate as I had hoped.
  * TODO: Turn off bluetooth after cancelling/timing out if we turned it on.
@@ -70,7 +71,7 @@ import java.util.TimerTask;
  *
  * TODO: Starting wifi after cancelling swap and beginning again doesn't work properly
  * TODO: Scan QR hangs when updating repoo. Swapper was 2.3.3 and Swappee was 5.0
- *
+ * TODO: Showing the progress bar during install doesn't work when the view is inflated again, or when the adapter is scrolled off screen and back again.
  */
 public class SwapService extends Service {
 

F-Droid/src/sun/net/www/protocol/bluetooth/Handler.java

@@ -0,0 +1,17 @@
+package sun.net.www.protocol.bluetooth;
+
+import java.io.IOException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLStreamHandler;
+
+/**
+ * This class is added so that the bluetooth:// scheme we use for the {@link org.fdroid.fdroid.net.BluetoothDownloader}
+ * is not treated as invalid by the {@link URL} class.
+ */
+public class Handler extends URLStreamHandler {
+    @Override
+    protected URLConnection openConnection(URL u) throws IOException {
+        throw new UnsupportedOperationException("openConnection() not supported on bluetooth:// URLs");
+    }
+}