Android 文字转语音库
示例
layout_text_to_speech.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="在此输入文字!"
android:id="@+id/textToSpeak"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_below="@id/textToSpeak"
android:id="@+id/btnSpeak"/>
</RelativeLayout>AndroidTextToSpeechActivity.java
public class AndroidTextToSpeechActivity extends Activity implements
TextToSpeech.OnInitListener{
EditText textToSpeak = null;
Button btnSpeak = null;
TextToSpeech tts;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textToSpeak = findViewById(R.id.textToSpeak);
btnSpeak = findViewById(R.id.btnSpeak);
btnSpeak.setEnabled(false);
tts = new TextToSpeech(this, this);
btnSpeak.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
speakOut();
}
});
}
@Override
public void onDestroy() {
//不要忘记关闭tts!
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
@Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
int result = tts.setLanguage(Locale.US);
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "This Language is not supported");
} else {
btnSpeak.setEnabled(true);
speakOut();
}
} else {
Log.e("TTS", "初始化失败!");
}
}
private void speakOut() {
String text = textToSpeak.getText().toString();
if(text == null || text.isEmpty())
return;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
String utteranceId=this.hashCode() + "";
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null, utteranceId);
} else {
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}
}
}被说的语言,可以通过提供一个设置Locale为setLanguage()方法:
tts.setLanguage(Locale.CHINESE); //中文
支持的语言数量在Android级别之间有所不同。该方法isLanguageAvailable()可用于检查是否支持某种语言:
tts.isLanguageAvailable(Locale.CHINESE);
可以使用该setPitch()方法来设置语音音调级别。默认情况下,音高值为1.0。使用小于1.0的值减小音调级别,或使用大于1.0的值增大音调级别:
tts.setPitch(0.6);
可以使用设置语音速率setSpeechRate()。默认语音速率是1.0。可以通过将语音速率设置为2.0来使其翻倍,或者通过将其设置为0.5来使语音速率提高一半:
tts.setSpeechRate(2.0);