在Android Studio中初始化TextToSpeech類

Question

我正在制作我的第一個Android應用程序，但是我無法將文本轉換成語音。

應用程序的要點：用戶選擇要設置警報的時間（使用TimePicker），然后應用程序將計算剩余時間，並不斷更新剩余時間。

我希望使用文本語音引擎以5分鍾的間隔對用戶進行口頭更新，以告知他們還剩多少時間。

一切都可以編譯並正常運行，但是文本到語音只是什么也沒做。 我已經花了幾天的時間來找出如何在Java中正確初始化TextToSpeech類，但是我發現的所有情況似乎都因情況而異地對其進行了初始化。

在嘗試了多種不同的實現方式之后，所有的實現都具有相同的結果，我決定只創建一個單獨的內部類，以使編輯和嘗試新事物變得更加容易，並且我可以使Voice類並在其上調用方法。

我僅用Java編寫代碼已有幾個月了，而這是我的第一個Android應用程序，因此我在自行進行排序方面遇到很多麻煩。

下面是我用來初始化TextToSpeech類的單獨的（內部/嵌套）類：

    private class Voice implements TextToSpeech.OnInitListener {
    Context context = getApplicationContext();
    TextToSpeech tts = new TextToSpeech(context, this);

    public void onInit(int initStatus) {
        if (initStatus == TextToSpeech.SUCCESS) {
            tts.setLanguage(Locale.US);
        }
    }

    private void say(String announcement) {
        tts.speak(announcement, TextToSpeech.QUEUE_FLUSH, null);
    }
}

這是活動中的其余代碼（我使用單獨的活動來顯示倒計時）

import android.content.Context;
import android.speech.tts.TextToSpeech;
import android.support.v7.app.AppCompatActivity;
import android.os.*;
import android.widget.*;
import java.util.*;
import java.lang.*;


public class TimerActivity extends AppCompatActivity{

private int alarmHour = MainActivity.alarmHour;
private int alarmMinute = MainActivity.alarmMinute;
private Calendar alarmTime;
private Calendar currentTime;
private TextView timerText;
private TextView lateText;
private int hoursLeft;
private int minutesLeft;
private long difference;
private long calculatedMinutes;
private boolean late = false;
private String lateMessageString = "LATE!";
private String timeRemainingString = "remaining";
private Handler handler = new Handler();
private TextToSpeech tts;
private double pitch = 1;
private double speed = 1;
private int MY_DATA_CHECK_CODE = 0;
private Voice voice;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_timer);
    voice = new Voice();
    voice.say("This is some bullshit.");
    initializeTimer();
}

private void initializeTimer () {
    voice.say("Yes, hello. Is it me you're looking for?");
    timerText = (TextView) findViewById(R.id.timerText);
    lateText = (TextView) findViewById(R.id.lateText);
    setAlarm();
    calculateTimeLeft();
    String timerString = getTimerString();
    timerText.setText(timerString);
    if (late) {
        lateText.setText(lateMessageString);
    }
    else {
        lateText.setText(timeRemainingString);
    }

    Timer timer = new Timer();
    timer.schedule(new UpdateTimer(),100,60000);
}



private class UpdateTimer extends TimerTask {
    public void run() {
        handler.post(new Runnable() {
            public void run() {
                calculateTimeLeft();
                String timerString = getTimerString();
                timerText.setText(timerString);
                if (late) {
                    lateText.setText(lateMessageString);
                }
                else {
                    lateText.setText(timeRemainingString);
                }
            }

        });
    }
}


private void setAlarm() {
    alarmTime = Calendar.getInstance();
    currentTime = Calendar.getInstance();
    alarmTime.setTimeInMillis(System.currentTimeMillis());
    alarmTime.set(Calendar.HOUR_OF_DAY, alarmHour);
    alarmTime.set(Calendar.MINUTE, alarmMinute);
    // If alarm is set for the past, then set the alarm for the next day at the specified time
    if (alarmTime.getTimeInMillis() - System.currentTimeMillis() < 0) {
        alarmTime.set(Calendar.DAY_OF_YEAR, alarmTime.get(Calendar.DAY_OF_YEAR) + 1);
    }
}

private void calculateTimeLeft() {
    currentTime.setTimeInMillis(System.currentTimeMillis());
    difference = alarmTime.getTimeInMillis() - System.currentTimeMillis();
    long seconds = difference/1000; // convert to seconds
    long calculatedHours = seconds / 3600; // Find the number of hours until alarm
    calculatedMinutes = (seconds % 3600) / 60; // Use mod to remove the number of hours, leaving only seconds since the last hour, then divide by 60 to get minutes

    hoursLeft = (int)Math.abs(calculatedHours); // Get the absolute value of the time left for the string
    minutesLeft = (int)Math.abs(calculatedMinutes); // Absolute value of the minutes for string use
}

private String getTimerString() {
    // Format the string showing the time remaining
    String timeLeftString;
    if (hoursLeft == 0) {
        timeLeftString = "";
    }
    else if (hoursLeft == 1) {
        timeLeftString = hoursLeft + "hr ";
    }
    else {
        timeLeftString = hoursLeft +"hrs ";
    }
    if (hoursLeft == 0) {
        timeLeftString += minutesLeft;
    }
    /*
    else if (minutesLeft < 10 && calculatedMinutes > 0) {
        timeLeftString += "0" + minutesLeft;
    }
    */
    else {
        timeLeftString += minutesLeft;
    }
    if (calculatedMinutes >= 0 && hoursLeft > 0) {
        timeLeftString += " mins";
    }
    else if (calculatedMinutes > 0) {
        timeLeftString += " mins";
    }
    else if (difference <= 0) {
        late = true;
    }
    return timeLeftString;
}




private class Voice implements TextToSpeech.OnInitListener {
    Context context = getApplicationContext();
    TextToSpeech tts = new TextToSpeech(context, this);

    public void onInit(int initStatus) {
        if (initStatus == TextToSpeech.SUCCESS) {
            tts.setLanguage(Locale.US);
        }
    }

    private void say(String announcement) {
        tts.speak(announcement, TextToSpeech.QUEUE_FLUSH, null);
    }
}

}

Answer 1

我認為您聽不到任何想要的聲音。

因為調用構造函數后， TextToSpeech類無法立即說。

TextToSpeech類實例在初始化時需要連接到系統TTS服務。

如果實例成功連接到服務， onInit激活TextToSpeech.OnInitListener onInit ！

這樣，您可以在onInit功能完成后聽到聲音。 試着將你的voice.say在功能onInit功能。

private class Voice implements TextToSpeech.OnInitListener {
    Context context = getApplicationContext();
    TextToSpeech tts = new TextToSpeech(context, this);

    public void onInit(int initStatus) {
        if (initStatus == TextToSpeech.SUCCESS) {
            tts.setLanguage(Locale.US);
            // try it!
            voice.say("Can you hear this sentence?");
            // If you want to another "say", check this log.
            // Your voice will say after you see this log at logcat.
            Log.i("TAG", "TextToSpeech instance initialization is finished.");
        }
    }

    private void say(String announcement) {
        tts.speak(announcement, TextToSpeech.QUEUE_FLUSH, null);
    }
}