将 class 中的文字转语音与 activity class 分开

Question

我正在尝试创建一个 class 可以从任何 activity 调用它来读出 EditText 框中的文本。当我运行我目前拥有的代码时，它会播放警报声音，但随后无法播放文本到语音内容。我需要更改什么才能让文本也播放？我知道 activity 布局 XML 代码是正确的，因为 Text To Speech 代码在直接位于 activity class 中时有效。我四处寻找解决方案，但没有其他地方概述如何从线程上下文执行此操作。

我在下面包含了我的代码：

在 AircraftMain.java

View.OnClickListener speakBtnOnClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View arg0) {

            String toSpeak = textToSpeak.getText().toString();
            TextToSpeak speak = new TextToSpeak(AircraftMain.this, toSpeak);
            speak.run();

        }
    };

TextToSpeak.java

import android.app.Activity;
import android.media.MediaPlayer;
import android.speech.tts.TextToSpeech;
import java.util.Locale;

public class TextToSpeak implements Runnable {

    private Activity activity;
    private static String text;
    private static TextToSpeech talk;

    public TextToSpeak(Activity activity, String toSpeak) {
        this.activity = activity;
        text = toSpeak;
    }

    public void run() {

        talk = new TextToSpeech(activity, new TextToSpeech.OnInitListener() {
            @Override
            public void onInit(int status) {
                if(status != TextToSpeech.ERROR) {
                    talk.setLanguage(Locale.UK);
                }
            }
        });

        talk.addEarcon("Attention", "com.kieronmc.aircraftgps", R.raw.warning_beep);
        talk.playEarcon("Attention", QUEUE_ADD,null);    
        talk.setLanguage(Locale.UK);
        talk.speak(text, TextToSpeech.QUEUE_ADD, null);
    }
}

Answer 1

试试这个代码，它应该可以工作：

1) 创建一个文本转语音初始化器如下：

public class TextToSpeechInitializer{

private Context context;
private static TextToSpeech talk;
private TextToSpeechIniListener callback;
private Locale locale;

public TextToSpeechInitializer(Context context , Locale locale , TextToSpeechIniListener l) {
    this.context = context;
    if(l != null) {
        callback = l;
    }
    this.locale = locale;
    initialize();
}


private void initialize() {
    talk = new TextToSpeech(context, new TextToSpeech.OnInitListener() {
        @Override
        public void onInit(int status) {
            if (status == TextToSpeech.SUCCESS) {
                talk.setLanguage(locale); //TODO: Check if locale is available before setting.
                callback.onSucces(talk);
            }else{
                callback.onFailure(talk);
                Log.e("TTS","TextToSpeechInitializeError");
            }
        }
    });
}
}

2) 上面的初始化器class调用这个接口class来通知下面的activity(TTS成功或失败):

public interface TextToSpeechIniListener {

public void onSucces(TextToSpeech tts);

public void onFailure(TextToSpeech tts);
}

3) Activity

public class Demo7 extends AppCompatActivity implements TextToSpeechIniListener {

private Button b;
private TextToSpeechInitializer i;
private TextToSpeech talk;
private boolean flag = false;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.demo7);
    i = new TextToSpeechInitializer(this, Locale.UK, this);
    b = (Button) findViewById(R.id.b);


    b.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(flag) {
                talk.addEarcon("Attention", getPackageName(), R.raw.androidcalm);
                talk.playEarcon("Attention", QUEUE_ADD, null);
                //talk.setLanguage(Locale.UK);
                talk.speak("Hello, Testing", QUEUE_ADD, null);
            }
        }
    });
}

@Override
protected void onDestroy() {
    super.onDestroy();
    if(talk != null){
        talk.stop();
        talk.shutdown();
    }
}

@Override
public void onSucces(TextToSpeech tts) {
    this.talk = tts;
    flag = true;
}

@Override
public void onFailure(TextToSpeech tts) {
    flag = false;
    finish();
}
}

布局demo7.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">

<Button
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/b"
    android:text="speak"/>

</LinearLayout>

将 class 中的文字转语音与 activity class 分开

Call text to speech from class separate to activity class

java

android

text-to-speech

google-text-to-speech