Use transparent keys for extension keyboard.
diff --git a/res/layout/input_trans.xml b/res/layout/input_trans.xml
new file mode 100755
index 0000000..a988bcc
--- /dev/null
+++ b/res/layout/input_trans.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2010, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<com.android.inputmethod.latin.LatinKeyboardView
+ xmlns:android="http://schemas.android.com/apk/res/android"
+ android:id="@android:id/keyboardView"
+ android:layout_alignParentBottom="true"
+ android:layout_width="match_parent"
+ android:layout_height="wrap_content"
+ android:background="#A0000000"
+ android:keyBackground="@drawable/btn_keyboard_key_fulltrans"
+ />