Android实现自动朗读功能(TTS)

时间:2024-03-12 20:20:10

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
    xmlns:tools="http://schemas.android.com/tools"
    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>

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();
    }
}

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"/>

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