Android离线文字转语音(TTS)原生实现

深碍√TFBOYSˉ_ 2022-11-09 12:35 586阅读 0赞

目前文字转语音用的最多的是第三方服务科大讯飞，不过需要收费。google也有离线文字转语音sdk，支持中文，发音也很好，使用免费的它不香吗？下边介绍具体使用步骤：

### 一、下载并设置Google文字转语音引擎 ###

首先下载Google文字转语音引擎并安装。安装完成后在设置–>辅助功能–>无障碍–>文字转语音输出中将Google 文字转语音引擎设置为默认语音引擎。点击Google语音引擎设置，在引擎设置页面联网安装所需要的语音数据包。

下图为引擎设置页面：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NfZnVyb25n_size_16_color_FFFFFF_t_70_pic_center]

下图为引擎语音数据下载页面：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NfZnVyb25n_size_16_color_FFFFFF_t_70_pic_center 1]

下图为google 语音引擎应用详情页面：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NfZnVyb25n_size_16_color_FFFFFF_t_70_pic_center 2]

### 二、文字转语音编码实现 ###

代码比较简单，就不讲解了，有需要的直接粘贴使用吧。

activity\_main.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center_horizontal"
        android:orientation="vertical"
        tools:context=".MainActivity">
    
        <TextView
            android:id="@+id/content_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingStart="20dp"
            android:paddingTop="10dp"
            android:paddingEnd="20dp"
            android:paddingBottom="10dp"
            android:text="我是需要转换为语音的文本" />
    
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="startSpeak"
            android:text="开始转换" />
    </LinearLayout>

MainActivity.java

package com.furong.googletts;
    
    import android.speech.tts.TextToSpeech;
    import android.speech.tts.UtteranceProgressListener;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.View;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import java.util.HashMap;
    import java.util.Locale;
    import java.util.Random;
    
    public class MainActivity extends AppCompatActivity implements TextToSpeech.OnInitListener {
        private TextView speechText;
        private TextToSpeech tts;
        private HashMap<String, String> params;
        private String mostRecentUtteranceID;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            speechText = findViewById(R.id.content_text);
    
            //Initialize TTS
            tts = new TextToSpeech(this, this);
    
            //Change the tone and speed to change the sound effect
            tts.setPitch(0.9f);
            tts.setSpeechRate(1.0f);
    
            //Set unique utterance ID for each utterance
            mostRecentUtteranceID = (new Random().nextInt() % 9999999) + "";
    
            //Set params
            //This method will work for more devices: API 19+
            params = new HashMap<>();
            params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, mostRecentUtteranceID);
        }
    
        public void startSpeak(View view) {
            if (tts != null && !tts.isSpeaking()) {
             int code = tts.speak(speechText.getText().toString(), TextToSpeech.QUEUE_FLUSH, params);
             if (code != SUCCESS) {
           			//do something
             	}
            }
        }
    
        @Override
        public void onInit(int status) {
            //Is TTS initialized successfully
            if (status == TextToSpeech.SUCCESS) {
                if (tts.getEngines().size() <= 0) {
                    Toast.makeText(MainActivity.this, "Please install the voice engine", Toast.LENGTH_SHORT).show();
                    return;
                }
    
                //The default language is Chinese
                int result = tts.setLanguage(Locale.CHINESE);
                if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
                    Toast.makeText(MainActivity.this, "Chinese is not supported", Toast.LENGTH_SHORT).show();
                    //Set to English when Chinese is not supported
                    tts.setLanguage(Locale.US);
                }
    
                //Set voice to text progress monitoring
                tts.setOnUtteranceProgressListener(new UtteranceProgressListener() {
                    @Override
                    public void onStart(String utteranceId) {
                    }
    
                    @Override
                    public void onDone(String utteranceId) {
                        // only respond to the most recent utterance
                        if (!utteranceId.equals(mostRecentUtteranceID)) {
                            Log.i("MainActivity", "onDone() blocked: utterance ID mismatch.");
                            return;
                        }
    
                        boolean wasCalledFromBackgroundThread = (Thread.currentThread().getId() != 1);
                        Log.i("MainActivity", "was onDone() called on a background thread? : " + wasCalledFromBackgroundThread);
    
                        // for demonstration only... avoid references to
                        // MainActivity (unless you use a WeakReference)
                        // inside the onDone() method, as it
                        // can cause a memory leak.
                        runOnUiThread(() -> {
                            //toast will not work if called from a background thread
                            Toast.makeText(MainActivity.this, "onDone working.", Toast.LENGTH_SHORT).show();
                        });
                    }
    
                    @Override
                    public void onError(String utteranceId) {
                    }
                });
            }
        }
    }

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