fix R class field resolving

- resolve by class name and package defined in AndroidManifest.xml

idea/src/org/jetbrains/jet/plugin/android/AndroidGotoDeclarationHandler.kt

@@ -28,16 +28,19 @@ import org.jetbrains.jet.lang.psi.JetSimpleNameExpression
 import org.jetbrains.jet.lang.psi.JetProperty
 import com.intellij.psi.impl.light.LightElement
 import com.intellij.psi.xml.XmlAttribute
+import org.jetbrains.jet.lang.resolve.android.isRClassField
+import com.intellij.psi.PsiField
 
 public class AndroidGotoDeclarationHandler : GotoDeclarationHandler {
     override fun getGotoDeclarationTargets(sourceElement: PsiElement?, offset: Int, editor: Editor?): Array<PsiElement>? {
         if (sourceElement is LeafPsiElement && sourceElement.getParent() is JetSimpleNameExpression) {
             val resolved = JetSimpleNameReference(sourceElement.getParent() as JetSimpleNameExpression).resolve()
+            if (resolved == null) return null
             val name = if (resolved is JetProperty) {
                 resolved.getName()
             }
-            else if (resolved is LightElement && resolved.getParent().toString() == "AndroidRClass") {
-                resolved.getName()
+            else if (isRClassField(resolved)) {
+                (resolved as PsiField).getName()
             }
             else null
             if (name != null) {

idea/src/org/jetbrains/jet/plugin/android/AndroidRenameProcessor.kt

@@ -29,13 +29,14 @@ import org.jetbrains.android.dom.wrappers.LazyValueResourceElementWrapper
 import org.jetbrains.android.util.AndroidResourceUtil
 import com.intellij.psi.xml.XmlAttribute
 import com.intellij.psi.impl.light.LightElement
+import org.jetbrains.jet.lang.resolve.android.isRClassField
 
 public class AndroidRenameProcessor : RenamePsiElementProcessor() {
     override fun canProcessElement(element: PsiElement): Boolean {
         // either renaming synthetic property, or value in ui xml, or R light class field
         return (element.namedUnwrappedElement is JetProperty &&
                 isAndroidSyntheticElement(element.namedUnwrappedElement)) || element is XmlAttributeValue ||
-                element is LightElement
+                isRClassField(element)
     }
 
     override fun prepareRenaming(element: PsiElement?, newName: String?, allRenames: MutableMap<PsiElement, String>, scope: SearchScope) {