Added new Sort order: ID descending

res/values/arrays.xml

@@ -1,10 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <string-array name="sort">
-        <item>Priority</item>
-        <item>Id</item>
-        <item>Text (A-Z)</item>
-    </string-array>
+	<string-array name="sort">
+		<item>Priority</item>
+		<item>ID Ascending</item>
+		<item>ID Descending</item>
+		<item>Text (A-Z)</item>
+	</string-array>
 
 </resources>

src/com/todotxt/todotxttouch/TaskHelper.java

@@ -56,7 +56,8 @@ public class TaskHelper {
 	private final static Pattern contextPattern = Pattern
 			.compile("(?:^|\\s)@(\\S*\\w)");
 
-	private final static Pattern projectPattern = Pattern.compile("\\+(\\S*\\w)");
+	private final static Pattern projectPattern = Pattern
+			.compile("\\+(\\S*\\w)");
 
 	private final static Pattern prependedDatePattern = Pattern
 			.compile("^(\\d{4})-(\\d{2})-(\\d{2}) (.*)");
@@ -113,6 +114,16 @@ public int compare(Task arg0, Task arg1) {
 		}
 	};
 
+	public static Comparator<Task> byIdReverse = new Comparator<Task>() {
+		@Override
+		public int compare(Task arg0, Task arg1) {
+			if (arg0 != null && arg1 != null) {
+				return Long.valueOf(arg1.id).compareTo(arg0.id);
+			}
+			return -1;
+		}
+	};
+
 	public static Comparator<Task> byPrio = new Comparator<Task>() {
 		@Override
 		public int compare(Task arg0, Task arg1) {

src/com/todotxt/todotxttouch/TodoTxtTouch.java

@@ -88,7 +88,8 @@ public class TodoTxtTouch extends ListActivity implements
 
 	private final static int SORT_PRIO = 0;
 	private final static int SORT_ID = 1;
-	private final static int SORT_TEXT = 2;
+	private final static int SORT_ID_REVERSE = 2;
+	private final static int SORT_TEXT = 3;
 
 	private final static int REQUEST_FILTER = 1;
 	private final static int REQUEST_PREFERENCES = 2;
@@ -676,6 +677,8 @@ void setFilteredTasks(boolean reload) {
 				Collections.sort(tasks, TaskHelper.byPrio);
 			} else if (m_sort == SORT_ID) {
 				Collections.sort(tasks, TaskHelper.byId);
+			} else if (m_sort == SORT_ID_REVERSE) {
+				Collections.sort(tasks, TaskHelper.byIdReverse);
 			} else if (m_sort == SORT_TEXT) {
 				Collections.sort(tasks, TaskHelper.byText);
 			}