说话失败:未绑定到 TTS 引擎

Question

问题：发言失败：未绑定到tts engine

我正在实现textToSpeech功能。我得到例外，因为说话失败：不受tts engine约束。我正在用它实现async task。async task将阅读mail。我想转换mail body to speech.

package com.example.trynot;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import java.util.Locale;
import com.example.trynot.MainActivity.ReadMailSample;
import android.app.Activity;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class Notify extends Activity implements TextToSpeech.OnInitListener {
/** Called when the activity is first created. */

public TextToSpeech tts = new TextToSpeech(MainActivity.c, Notify.this);
 public Notify()
 {
     System.out.println("Inside Constructor");
     speakOut();
 }
@Override
public void onDestroy() {
// Don't forget to shutdown tts!
if (tts != null) {
    tts.stop();
    tts.shutdown();
}
super.onDestroy();
}
@Override
public void onInit(int status) {
System.out.println("inside INIT");
if (status == TextToSpeech.SUCCESS) {
    int result = tts.setLanguage(Locale.US);
    tts.speak(MainActivity.ReadMailSample.command, TextToSpeech.QUEUE_FLUSH, null);
    if (result == TextToSpeech.LANG_MISSING_DATA
            || result == TextToSpeech.LANG_NOT_SUPPORTED) {
        Log.e("TTS", "This Language is not supported");
    } else {
        speakOut();
    }
} else {
    Log.e("TTS", "Initilization Failed!");
}
}
private void speakOut() {
    System.out.println("inside SPeak out");
tts.speak(MainActivity.ReadMailSample.command, TextToSpeech.QUEUE_FLUSH, null);
}

}

Answer 1

您应该将 tts 引擎实例的初始化移动到 onCreate，这一行：

public TextToSpeech tts = new TextToSpeech(MainActivity.c, Notify.this);

更改为：

public TextToSpeech tts;

并在您的onCreate中添加：

    tts = new TextToSpeech(MainActivity.c, Notify.this);

而且 - 最重要的是 - 不要在活动派生类中使用构造函数：

 public Notify()
 {
     System.out.println("Inside Constructor");
     speakOut();
 }

应该是你的onCreate：

 @Override
 protected void onCreate (Bundle savedInstanceState)
 {
     super.onCreate(savedInstanceState);
     //speakOut(); // here tts is not yet initialized, call it in onInit on success
     //tts = new TextToSpeech(MainActivity.c, Notify.this); // whats MainActivity.c?
     tts = new TextToSpeech(this, this);
 }

Answer 2

您的谷歌文字转语音引擎可能会被禁用...一旦检查您的设置

如果禁用，它也会显示相同的错误