force autogenerating if some generated file was removed

plugins/android/src/org/jetbrains/android/facet/AndroidFacet.java

@@ -112,7 +112,6 @@ public class AndroidFacet extends Facet<AndroidFacetConfiguration> {
 
   private final Set<AndroidAutogeneratorMode> myDirtyModes = EnumSet.noneOf(AndroidAutogeneratorMode.class);
   private final Map<AndroidAutogeneratorMode, Set<String>> myAutogeneratedFiles = new HashMap<AndroidAutogeneratorMode, Set<String>>();
-  private final Set<AndroidAutogeneratorMode> myInitializedModes = EnumSet.noneOf(AndroidAutogeneratorMode.class);
 
   private volatile boolean myAutogenerationEnabled = false;
 
@@ -130,10 +129,18 @@ public class AndroidFacet extends Facet<AndroidFacetConfiguration> {
     alarm.addRequest(new Runnable() {
       @Override
       public void run() {
+        boolean regenerate;
+
         synchronized (myDirtyModes) {
-          if (myAutogenerationEnabled && myDirtyModes.contains(mode)) {
-            myDirtyModes.remove(mode);
-            AndroidCompileUtil.doGenerate(getModule(), mode);
+          regenerate = myDirtyModes.contains(mode);
+        }
+        regenerate = regenerate || isGeneratedFileRemoved(mode);
+
+        if (myAutogenerationEnabled && regenerate) {
+          if (AndroidCompileUtil.doGenerate(getModule(), mode)) {
+            synchronized (myDirtyModes) {
+              myDirtyModes.remove(mode);
+            }
           }
         }
         alarm.addRequest(this, 2000);
@@ -142,6 +149,23 @@ public class AndroidFacet extends Facet<AndroidFacetConfiguration> {
     return alarm;
   }
 
+  private boolean isGeneratedFileRemoved(@NotNull AndroidAutogeneratorMode mode) {
+    synchronized (myAutogeneratedFiles) {
+      final Set<String> filePaths = myAutogeneratedFiles.get(mode);
+
+      if (filePaths != null) {
+        for (String path : filePaths) {
+          final VirtualFile file = LocalFileSystem.getInstance().findFileByPath(path);
+
+          if (file == null) {
+            return true;
+          }
+        }
+      }
+    }
+    return false;
+  }
+
   public void clearAutogeneratedFiles(@NotNull AndroidAutogeneratorMode mode) {
     synchronized (myAutogeneratedFiles) {
       final Set<String> set = myAutogeneratedFiles.get(mode);