Ignore <gnc:template-transactions> when importing

<gnc:template-transactions> contains Accounts and Transactions with
"template" Commodity, which would cause program to crash. Also, these
Accounts and Transactions seems not to be real Accounts and Transactions
of the book.

Author: fefe982

app/src/org/gnucash/android/export/xml/GncXmlHelper.java

@@ -60,6 +60,7 @@ public abstract class GncXmlHelper {
     public static final String TAG_TRN_SPLITS       = "trn:splits";
     public static final String TAG_TRN_SPLIT        = "trn:split";
     public static final String TAG_TRN_SLOTS        = "trn:slots";
+    public static final String TAG_TEMPLATE_TRANSACTION = "gnc:template-transactions";
 
     public static final String TAG_SPLIT_ID         = "split:id";
     public static final String TAG_SPLIT_MEMO       = "split:memo";

app/src/org/gnucash/android/importer/GncXmlHandler.java

@@ -75,6 +75,11 @@ public class GncXmlHandler extends DefaultHandler {
      */
     Split mSplit;
 
+    /**
+     * Ignore certain elements in GnuCash XML file, such as "<gnc:template-transactions>"
+     */
+    String mIgnoreElement = null;
+
     boolean mInColorSlot        = false;
     boolean mInPlaceHolderSlot  = false;
     boolean mInFavoriteSlot     = false;
@@ -122,12 +127,25 @@ public void startElement(String uri, String localName,
         if (qualifiedName.equalsIgnoreCase(GncXmlHelper.TAG_DATE_POSTED)){
             mIsDatePosted = true;
         }
+
+        if (qualifiedName.equalsIgnoreCase(GncXmlHelper.TAG_TEMPLATE_TRANSACTION)) {
+            mIgnoreElement = GncXmlHelper.TAG_TEMPLATE_TRANSACTION;
+        }
     }
 
     @Override
     public void endElement(String uri, String localName, String qualifiedName) throws SAXException {
         String characterString = mContent.toString().trim();
 
+        if (mIgnoreElement != null) {
+            // Ignore everything inside
+            if (qualifiedName.equalsIgnoreCase(mIgnoreElement)) {
+                mIgnoreElement = null;
+            }
+            mContent.setLength(0);
+            return;
+        }
+
         if (qualifiedName.equalsIgnoreCase(GncXmlHelper.TAG_NAME)) {
             mAccount.setName(characterString);
             mAccount.setFullName(characterString);