前言： Android提供了自动朗读支持。可以对指定文本内容进行朗读，从而发生声音；还允许把文本对应的音频录制成音频文件，方便以后播放。Android的自动朗读主要通过TextToSpeech来完成，构造器如：TextToSpeech(Context context, TextToSpeech.OnInitListennet listener);当创建TextToSpeech对象时，必须先提供一个OnInitListener监听器——负责监听TextToSpeech的初始化结果。
效果图如下：
使用TextToSpeech的步骤如下：
1、创建TextToSpeech对象，创建时传入OnInitListener监听器监听示范创建成功。
2、设置TextToSpeech所使用语言国家选项，通过返回值判断TTS是否支持该语言、国家选项。
3、调用speak()或synthesizeToFile方法。
4、关闭TTS，回收资源。
布局文件：
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<?
xml
version
=
"1.0"
encoding
=
"utf-8"
?>
<
LinearLayout
android:layout_width
=
"match_parent"
android:layout_height
=
"match_parent"
android:orientation
=
"vertical"
>
<
EditText
android:id
=
"@+id/input_text"
android:layout_marginTop
=
"20dp"
android:layout_width
=
"match_parent"
android:layout_height
=
"wrap_content"
/>
<
LinearLayout
android:layout_marginTop
=
"10dp"
android:layout_width
=
"match_parent"
android:layout_height
=
"wrap_content"
>
<
Button
android:id
=
"@+id/speech"
android:text
=
"Speech"
android:layout_width
=
"wrap_content"
android:layout_weight
=
"1"
android:layout_height
=
"wrap_content"
/>
<
Button
android:id
=
"@+id/record"
android:text
=
"Record"
android:layout_weight
=
"1"
android:layout_width
=
"wrap_content"
android:layout_height
=
"wrap_content"
/>
</
LinearLayout
>
</
LinearLayout
>
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Activity文件
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public
class
SpeechActivity
extends
AppCompatActivity {
private
EditText input;
private
Button speech,record;
private
TextToSpeech textToSpeech;
@Override
protected
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_speech);
textToSpeech =
new
TextToSpeech(
this
,
new
TextToSpeech.OnInitListener() {
@Override
public
void
onInit(
int
status) {
if
(status == textToSpeech.SUCCESS) {
int
result = textToSpeech.setLanguage(Locale.CHINA);
if
(result != TextToSpeech.LANG_COUNTRY_AVAILABLE
&& result != TextToSpeech.LANG_AVAILABLE){
Toast.makeText(SpeechActivity.
this
,
"TTS暂时不支持这种语音的朗读！"
,
Toast.LENGTH_SHORT).show();
}
}
}
});
input = (EditText) findViewById(R.id.input_text);
speech = (Button) findViewById(R.id.speech);
record = (Button) findViewById(R.id.record);
speech.setOnClickListener(
new
View.OnClickListener() {
@Override
public
void
onClick(View view) {
textToSpeech.speak(input.getText().toString(),
TextToSpeech.QUEUE_ADD,
null
);
}
});
record.setOnClickListener(
new
View.OnClickListener() {
@Override
public
void
onClick(View view) {
String inputText = input.getText().toString();
HashMap<String, String> myHashRender =
new
HashMap<>();
myHashRender.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, inputText);
textToSpeech.synthesizeToFile(inputText, myHashRender,
"/mnt/sdcard/my_recorder_audios/sound.wav"
);
Toast.makeText(SpeechActivity.
this
,
"声音记录成功。"
, Toast.LENGTH_SHORT).show();
}
});
}
@Override
protected
void
onDestroy() {
if
(textToSpeech !=
null
)
textToSpeech.shutdown();
super
.onDestroy();
}
}
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这里我们使用的是中文，int result = textToSpeech.setLanguage(Locale.CHINA);你也可以根据自己的需求更改为其他支持的语言。
最后在AndroidManifest.xml中加入权限：
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<
uses-permission
android:name
=
"android.permission.WRITE_EXTERNAL_STORAGE"
/>
<
uses-permission
android:name
=
"android.permission.READ_EXTERNAL_STORAGE"
/>
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总结：通过使用Android提供的TTS，我们可以对指定文本内容进行朗读，从而发生声音；还允许把文本对应的音频录制成音频文件，保存到本地短链接。