Rebind service on remote exception. Closes robotmedia#52

AndroidBillingLibrary/src/net/robotmedia/billing/BillingService.java

@@ -238,8 +238,7 @@ private void runPendingRequests() {
 		BillingRequest request;
 		int maxStartId = -1;		
 		while ((request = mPendingRequests.peek()) != null) {
-			if (mService != null) {
-				runRequest(request);
+			if (runIfConnected(request)) {
 				mPendingRequests.remove();
 				if (maxStartId < request.getStartId()) {
 					maxStartId = request.getStartId();
@@ -253,17 +252,35 @@ private void runPendingRequests() {
 			stopSelf(maxStartId);
 		}
 	}
-
-	private void runRequest(BillingRequest request) {
-		try {
-			final long requestId = request.run(mService);
-			BillingController.onRequestSent(requestId, request);
-		} catch (RemoteException e) {
-			Log.w(this.getClass().getSimpleName(), "Remote billing service crashed");
-			// TODO: Retry?
-		}
-	}
-
+
+    /**
+     * Called when a remote exception occurs while trying to execute the
+     * {@link BillingRequest#run(IMarketBillingService)} method.
+     * @param e the exception
+     */
+    protected void onRemoteException(RemoteException e) {
+		Log.w(this.getClass().getSimpleName(), "Remote billing service crashed");
+        mService = null;
+    }
+
+    /**
+     * Runs the given billing request if the service is already connected.
+     * @param request the billing request
+     * @return true if the request ran successfully; false if the service
+     * is not connected or there was an error when trying to use it
+     */
+    private boolean runIfConnected(BillingRequest request) {
+        if (mService == null) return false;
+        try {
+        	final long requestId = request.run(mService);
+    		BillingController.onRequestSent(requestId, request);
+    		return true;
+    	} catch (RemoteException e) {
+    		onRemoteException(e);
+        }
+        return false;
+    }
+
 	private void runRequestOrQueue(BillingRequest request) {
 		mPendingRequests.add(request);
 		if (mService == null) {