android texttospeech如何处理音频文件

Android TextToSpeech（TTS）库允许您将文本转换为语音。要处理音频文件，您需要执行以下步骤：

1. 添加依赖项： 在Android项目的build.gradle文件中，添加TextToSpeech库的依赖项：

dependencies {

    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.google.android.gms:play-services-tts:17.0.0'
}
    

1. 初始化TextToSpeech对象： 在您的Activity或Fragment中，初始化TextToSpeech对象并设置语言。

import android.speech.tts.TextToSpeech;
    
import android.speech.tts.TextToSpeech.OnInitListener;


public class MainActivity extends AppCompatActivity implements OnInitListener {
    

    private TextToSpeech tts;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
        super.onCreate(savedInstanceState);
    
        setContentView(R.layout.activity_main);
    

        tts = new TextToSpeech(this, this);

    }


    @Override
    public void onInit(int status) {

        if (status == TextToSpeech.SUCCESS) {
    
            int language = TextToSpeech.LANG_ENGLISH;
     // 设置语言，例如英语
            tts.setLanguage(language);

        }
 else {
    
            Log.e("TextToSpeech", "Initialization failed");

        }

    }

}
    

1. 生成语音： 使用TextToSpeech类的synthesizeToFile()方法将文本转换为音频文件。

import android.os.AsyncTask;
    
import android.os.Environment;
    
import java.io.File;
    
import java.io.FileOutputStream;
    
import java.io.IOException;
    

public class GenerateAudioTask extends AsyncTask<
    String, Void, Void>
 {
    

    private static final String DIRECTORY_NAME = "TTS_AUDIO";
    
    private static final String FILE_EXTENSION = ".mp3";


    @Override
    protected Void doInBackground(String... params) {
    
        String text = params[0];
    
        String filePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + DIRECTORY_NAME;
    
        File directory = new File(filePath);


        if (!directory.exists()) {
    
            directory.mkdirs();

        }
    

        String fileName = "output_" + System.currentTimeMillis() + FILE_EXTENSION;
    
        File audioFile = new File(filePath, fileName);


        try {
    
            tts.synthesizeToFile(text, TextToSpeech.QUEUE_FLUSH, audioFile.getAbsolutePath());

        }
 catch (IOException e) {
    
            e.printStackTrace();

        }
    

        return null;

    }

}
    

1. 播放音频文件： 使用MediaPlayer类播放生成的音频文件。

import android.media.MediaPlayer;


public class PlayAudioActivity extends AppCompatActivity {
    

    private MediaPlayer mediaPlayer;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
        super.onCreate(savedInstanceState);
    
        setContentView(R.layout.activity_play_audio);
    

        String filePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/TTS_AUDIO/output_1633027800000.mp3";
    
        mediaPlayer = new MediaPlayer();


        try {
    
            mediaPlayer.setDataSource(filePath);
    
            mediaPlayer.prepare();
    
            mediaPlayer.start();

        }
 catch (IOException e) {
    
            e.printStackTrace();

        }

    }


    @Override
    protected void onDestroy() {
    
        super.onDestroy();

        if (mediaPlayer != null) {
    
            mediaPlayer.release();
    
            mediaPlayer = null;

        }

    }

}
    

注意：在Android 6.0（API级别23）及更高版本中，需要在运行时请求存储权限。确保在AndroidManifest.xml文件中添加以下权限：

<
    uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    
<
    uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    

并在运行时请求权限。

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