Add sample TTS engine

Bug: 4149751
Change-Id: Id8e96d4ec442db46cb97edaeab3ef7c13321ba1f

samples/TtsEngine/src/com/example/android/ttsengine/RobotSpeakSettings.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+package com.example.android.ttsengine;
+
+import android.os.Bundle;
+import android.preference.PreferenceActivity;
+
+import java.util.List;
+
+/*
+ * This class is referenced via a meta data section in the manifest.
+ * A settings screen is optional, and if a given engine has no settings,
+ * there is no need to implement such a class.
+ */
+public class RobotSpeakSettings extends PreferenceActivity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public void onBuildHeaders(List<Header> target) {
+        loadHeadersFromResource(R.xml.preferences_headers, target);
+    }
+}