Fixed id offset, minor changes.

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/remote/ui/SelectSignKeyIdListFragment.java

@@ -179,6 +179,7 @@ public class SelectSignKeyIdListFragment extends RecyclerFragment<SelectSignKeyA
         mApiDao.addAllowedKeyIdForApp(allowedKeysUri, masterKeyId);
         mResult.putExtra(OpenPgpApi.EXTRA_SIGN_KEY_ID, masterKeyId);
 
+        Log.d(Constants.TAG, "allowedKeyId: " + masterKeyId);
         Log.d(Constants.TAG, "allowedKeysUri: " + allowedKeysUri);
 
         getActivity().setResult(Activity.RESULT_OK, mResult);

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/remote/ui/adapter/SelectSignKeyAdapter.java

@@ -40,10 +40,10 @@ public class SelectSignKeyAdapter extends KeyCursorAdapter<CursorAdapter.KeyCurs
 
     @Override
     public long getItemId(int pos) {
-        if(pos < (super.getItemCount() - 1)) {
+        if(pos < super.getItemCount()) {
             return super.getItemId(pos);
         } else {
-            return 0L;
+            return RecyclerView.NO_ID;
         }
     }
 

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/KeyCursorAdapter.java

@@ -14,6 +14,7 @@ public abstract class KeyCursorAdapter<C extends CursorAdapter.KeyCursor, VH ext
 
     public KeyCursorAdapter(Context context, C cursor){
         super(context, cursor, 0);
+        setHasStableIds(true);
     }
 
     public void setQuery(String query) {

OpenKeychain/src/main/res/layout/select_sign_key_item.xml

@@ -8,6 +8,7 @@
     android:minHeight="?android:attr/listPreferredItemHeight"
     android:paddingLeft="4dp"
     android:paddingRight="?android:attr/scrollbarSize"
+    android:background="?android:selectableItemBackground"
     android:maxLines="1">
 
     <LinearLayout