Question

我已经在我的Android应用程序中实现了一个非常基本的TTS，当应用程序在前台运行时似乎运行良好，但在后台运行时它不会播放。它等待应用程序返回到前台并播放队列中的内容。如何为我的GPS跟踪应用程序实现此功能，该应用程序需要在显示屏关闭时提供跟踪反馈？我的主要类实现： TextToSpeech.OnInitListener

我将tts排队：

ttsProgressStr = "Time " +
                timeStringForVoice(trackingTimeMillis);
ttsEngine.speak(ttsProgressStr, TextToSpeech.QUEUE_FLUSH, null, null);

Answer 1

请参阅此

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;
import java.util.Locale;

public class MainActivity extends Activity implements
    TextToSpeech.OnInitListener {
/** Called when the activity is first created. */

private TextToSpeech tts;
private Button buttonSpeak;
private EditText editText;

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

    tts = new TextToSpeech(this, this);
    buttonSpeak = (Button) findViewById(R.id.button1);
    editText = (EditText) findViewById(R.id.editText1);

    buttonSpeak.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View arg0) {
            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) {

    if (status == TextToSpeech.SUCCESS) {

        int result = tts.setLanguage(Locale.US);

        if (result == TextToSpeech.LANG_MISSING_DATA
                || result == TextToSpeech.LANG_NOT_SUPPORTED) {
            Log.e("TTS", "This Language is not supported");
        } else {
            buttonSpeak.setEnabled(true);
            speakOut();
        }

    } else {
        Log.e("TTS", "Initilization Failed!");
    }

}

private void speakOut() {
    String text = editText.getText().toString();
    tts.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}
}

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:tools="http://schemas.android.com/tools"
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context=".MainActivity">

<EditText
    android:id="@+id/editText1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="77dp"
    android:layout_marginTop="42dp"
    android:ems="10" >

    <requestFocus />
</EditText>

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/editText1"
    android:layout_below="@+id/editText1"
    android:layout_marginLeft="59dp"
    android:layout_marginTop="39dp"
    android:text="Speak" />

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBaseline="@+id/editText1"
    android:layout_alignBottom="@+id/editText1"
    android:layout_alignParentLeft="true"
    android:text="Enter Text:" />

</RelativeLayout>

文本到语音 - 不在后台工作

1 个答案: