0A01-APP-Text-to-Speech

標籤：android   des   class   code   java   c   

描述把文本讀出的API，在手機上測試知識支援英文，中文庫應該沒有所以不支援

 /* * 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.    @Override    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);    }}

實現步驟：

1.繼承TextToSpeech.OnInitListener

2.實現onInit方法在這裡載入語言int result = mTts.setLanguage(Locale.US);

3.初始化的執行個體TextToSpeech mTts =  mTts = new TextToSpeech(this,
            this  // TextToSpeech.OnInitListener
            );

4.調用其的speak方法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);
    }