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1. <uses-permission android:name="android.permission.INTERNET"></uses-permission>
2. <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
3. <uses-permission android:name="android.permission.READ_PHONE_STATE"/>

初始化SpeechSynthesizer对象

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1. speechSynthesizer = new SpeechSynthesizer(getApplicationContext(),
2. "holder", this);
3. // 此处需要将setApiKey方法的两个参数替换为你在百度开发者中心注册应用所得到的apiKey和secretKey
4. speechSynthesizer.setApiKey("your-apiKey", "your-secretKey");

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1. private void setParams() {
2. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_SPEAKER, "0");
3. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_VOLUME, "5");
4. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_SPEED, "5");
5. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_PITCH, "5");
6. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_AUDIO_ENCODE, "1");
7. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_AUDIO_RATE, "4");
8. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_LANGUAGE, "ZH");
9. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_NUM_PRON, "0");
10. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_ENG_PRON, "0");
11. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_PUNC, "0");
12. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_BACKGROUND, "0");
13. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_STYLE, "0");
14. speechSynthesizer.setParam(SpeechSynthesizer.PARAM_TERRITORY, "0");
15. }

不需要实现这么多参数，具体参数的含义可以参看SDK的使用文档和参数设置。

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1. speechSynthesizer.setAudioStreamType(AudioManager.STREAM_MUSIC);

以上内容即可以实现语音合成的操作，识别过程中可以使用SpeechSynthesizerListener来监听状态，从而更好的实现界面同步。

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1. class listener implements SpeechSynthesizerListener {
2. @Override
3. public void onStartWorking(SpeechSynthesizer synthesizer) {
4. logDebug("开始工作，请等待数据...");
5. }
6. @Override
7. public void onSpeechStart(SpeechSynthesizer synthesizer) {
8. logDebug("朗读开始");
9. }
10. @Override
11. public void onSpeechResume(SpeechSynthesizer synthesizer) {
12. logDebug("朗读继续");
13. }
14. @Override
15. public void onSpeechProgressChanged(SpeechSynthesizer synthesizer, int progress) {
16. }
17. @Override
18. public void onSpeechPause(SpeechSynthesizer synthesizer) {
19. logDebug("朗读已暂停");
20. }
21. @Override
22. public void onSpeechFinish(SpeechSynthesizer synthesizer) {
23. logDebug("朗读已停止");
24. }
25. @Override
26. public void onNewDataArrive(SpeechSynthesizer synthesizer, byte[] dataBuffer, int dataLength) {
27. logDebug("新的音频数据：" + dataLength);
28. }
29. @Override
30. public void onError(SpeechSynthesizer synthesizer, SpeechError error) {
31. logError("发生错误：" + error.errorDescription + "(" + error.errorCode + ")");
32. }
33. @Override
34. public void onCancel(SpeechSynthesizer synthesizer) {
35. logDebug("已取消");
36. }
37. @Override
38. public void onBufferProgressChanged(SpeechSynthesizer synthesizer, int progress) {
39. }
40. }