3 files changed, 7 insertions, 2 deletions
diff --git a/anttasks/src/com/android/ant/ApkBuilderTask.java b/anttasks/src/com/android/ant/ApkBuilderTask.java
index 1cf1c0d..5b3654f 100644
--- a/anttasks/src/com/android/ant/ApkBuilderTask.java
+++ b/anttasks/src/com/android/ant/ApkBuilderTask.java
@@ -233,7 +233,9 @@ public class ApkBuilderTask extends SingleDependencyTask {
             inputPaths.add(resourceInputPath);
 
             // dex file
-            inputPaths.add(new InputPath(dexFile));
+            if (dexFile != null) {
+                inputPaths.add(new InputPath(dexFile));
+            }
 
             // zip input files
             List<File> zipFiles = new ArrayList<File>();
diff --git a/anttasks/src/com/android/ant/BuildTypedTask.java b/anttasks/src/com/android/ant/BuildTypedTask.java
index c697bac..3f4b64a 100644
--- a/anttasks/src/com/android/ant/BuildTypedTask.java
+++ b/anttasks/src/com/android/ant/BuildTypedTask.java
@@ -41,7 +41,7 @@ public abstract class BuildTypedTask extends Task {
     }
 
     /**
-     * Returns if it is a new build. If the built type is not input
+     * Returns if it is a new build. If the build type is not input
      * from the XML, this always returns true.
      * A build type is defined by having an empty previousBuildType.
      */
diff --git a/anttasks/src/com/android/ant/InputPath.java b/anttasks/src/com/android/ant/InputPath.java
index b1a98b5..905e7bc 100644
--- a/anttasks/src/com/android/ant/InputPath.java
+++ b/anttasks/src/com/android/ant/InputPath.java
@@ -34,6 +34,9 @@ public class InputPath {
     }
 
     public InputPath(File file, Set<String> extensionsToCheck) {
+        if (file == null) {
+            throw new RuntimeException("File in InputPath(File) can't be null");
+        }
         mFile = file;
         mTouchedExtensions = extensionsToCheck;
     }