am d2962a33: TextToSpeech API demo.

Merge commit 'd2962a33216ce40a526c80fc8865cf9bd04936f4' into eclair-mr2

* commit 'd2962a33216ce40a526c80fc8865cf9bd04936f4':
  TextToSpeech API demo.

samples/ApiDemos/AndroidManifest.xml

@@ -553,6 +553,15 @@
             </intent-filter>
         </activity>
 
+        <!-- Text-To-Speech Samples -->
+
+        <activity android:name=".app.TextToSpeechActivity" android:label="@string/text_to_speech">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.SAMPLE_CODE" />
+            </intent-filter>
+        </activity>
+
         <!-- ************************************* -->
         <!--        CONTENT PACKAGE SAMPLES        -->
         <!-- ************************************* -->

samples/ApiDemos/res/layout/text_to_speech.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2009 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.
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    >
+    <Button android:id="@+id/again_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:enabled="false"
+        android:text="@string/again" />
+</LinearLayout>

samples/ApiDemos/res/values/strings.xml

@@ -221,6 +221,9 @@
 
     <string name="voice_recognition">App/Voice Recognition</string>
 
+    <string name="text_to_speech">App/Text-To-Speech</string>
+    <string name="again">Again</string>
+
     <!-- ============================== -->
     <!--  app/content examples strings  -->
     <!-- ============================== -->

samples/ApiDemos/src/com/example/android/apis/app/TextToSpeechActivity.java

@@ -0,0 +1,136 @@
+ /*
+ * Copyright (C) 2009 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.apis.app;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.speech.tts.TextToSpeech;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+
+import com.example.android.apis.R;
+
+import java.util.Locale;
+import java.util.Random;
+
+/**
+ * <p>Demonstrates text-to-speech (TTS). Please note the following steps:</p>
+ *
+ * <ol>
+ * <li>Construct the TextToSpeech object.</li>
+ * <li>Handle initialization callback in the onInit method.
+ * The activity implements TextToSpeech.OnInitListener for this purpose.</li>
+ * <li>Call TextToSpeech.speak to synthesize speech.</li>
+ * <li>Shutdown TextToSpeech in onDestroy.</li>
+ * </ol>
+ *
+ * <p>Documentation:
+ * http://developer.android.com/reference/android/speech/tts/package-summary.html
+ * </p>
+ * <ul>
+ */
+public class TextToSpeechActivity extends Activity implements TextToSpeech.OnInitListener {
+
+    private static final String TAG = "TextToSpeechDemo";
+
+    private TextToSpeech mTts;
+    private Button mAgainButton;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.text_to_speech);
+
+        // Initialize text-to-speech. This is an asynchronous operation.
+        // The OnInitListener (second argument) is called after initialization completes.
+        mTts = new TextToSpeech(this,
+            this  // TextToSpeech.OnInitListener
+            );
+
+        // The button is disabled in the layout.
+        // It will be enabled upon initialization of the TTS engine.
+        mAgainButton = (Button) findViewById(R.id.again_button);
+
+        mAgainButton.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                sayHello();
+            }
+        });
+    }
+
+    @Override
+    public void onDestroy() {
+        // Don't forget to shutdown!
+        if (mTts != null) {
+            mTts.stop();
+            mTts.shutdown();
+        }
+
+        super.onDestroy();
+    }
+
+    // Implements TextToSpeech.OnInitListener.
+    public void onInit(int status) {
+        // status can be either TextToSpeech.SUCCESS or TextToSpeech.ERROR.
+        if (status == TextToSpeech.SUCCESS) {
+            // Set preferred language to US english.
+            // Note that a language may not be available, and the result will indicate this.
+            int result = mTts.setLanguage(Locale.US);
+            // Try this someday for some interesting results.
+            // int result mTts.setLanguage(Locale.FRANCE);
+            if (result == TextToSpeech.LANG_MISSING_DATA ||
+                result == TextToSpeech.LANG_NOT_SUPPORTED) {
+               // Lanuage data is missing or the language is not supported.
+                Log.e(TAG, "Language is not available.");
+            } else {
+                // Check the documentation for other possible result codes.
+                // For example, the language may be available for the locale,
+                // but not for the specified country and variant.
+
+                // The TTS engine has been successfully initialized.
+                // Allow the user to press the button for the app to speak again.
+                mAgainButton.setEnabled(true);
+                // Greet the user.
+                sayHello();
+            }
+        } else {
+            // Initialization failed.
+            Log.e(TAG, "Could not initialize TextToSpeech.");
+        }
+    }
+
+    private static final Random RANDOM = new Random();
+    private static final String[] HELLOS = {
+      "Hello",
+      "Salutations",
+      "Greetings",
+      "Howdy",
+      "What's crack-a-lackin?",
+      "That explains the stench!"
+    };
+
+    private void sayHello() {
+        // Select a random hello.
+        int helloLength = HELLOS.length;
+        String hello = HELLOS[RANDOM.nextInt(helloLength)];
+        mTts.speak(hello,
+            TextToSpeech.QUEUE_FLUSH,  // Drop all pending entries in the playback queue.
+            null);
+    }
+
+}