您的问题是由于您在每次调用 speak() 时实例化一个新的 TextToSpeech 对象,这不是必需的。通过我在下面提供的更新,您可以关闭并重新打开一个 TTS 对象,而不是多个,因此当您关闭它时,单个 TTS 对象将停止并且您的问题不再存在。
我已经在我的手机上对此进行了测试,它应该可以完全按照您的需要工作。
请在下面检查我的更新代码:
更新了声乐课
import android.content.Context;
import android.os.Build;
import android.speech.tts.TextToSpeech;
import android.util.Log;
import java.util.Locale;
public class Voc {
static TextToSpeech mytts = null;
public static void init(Context c){
mytts=new TextToSpeech(c, new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if(status == TextToSpeech.SUCCESS){
int result=mytts.setLanguage(Locale.US);
if(result==TextToSpeech.LANG_NOT_SUPPORTED ||
result==TextToSpeech.LANG_MISSING_DATA){
Log.d("error", "Language not supported");
}
} else
Log.d("error", "TTS failed :(");
}
});
}
public static void speak(final String myText){
if(mytts != null) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mytts.speak(myText, TextToSpeech.QUEUE_FLUSH, null, null);
} else {
//cover all versions...
mytts.speak(myText, TextToSpeech.QUEUE_FLUSH, null);
}
}
}
public static void off(){
if(mytts !=null) {
mytts.stop();
//mytts.shutdown(); //calling this here is not what we want
}
}
public static void shutdown(){
if(mytts !=null) {
mytts.shutdown(); //if you need call shutdown with this method
}
}
}
测试的主要活动
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Voc.init(getApplicationContext()); //this is the method that sets everything up
Button onButton = (Button) findViewById(R.id.button_on);
onButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Voc.speak("blah blah blah blah blah blah blah blah");
}
});
Button offButton = (Button) findViewById(R.id.button_off);
offButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Voc.off();
}
});
}
}
测试布局示例
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.viatechsystems.tts.MainActivity">
<Button
android:id="@+id/button_on"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Click me for TTS"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintHorizontal_bias="0.292"
app:layout_constraintVertical_bias="0.498" />
<Button
android:id="@+id/button_off"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Off"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="@+id/button_on"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintHorizontal_bias="0.75"
app:layout_constraintVertical_bias="0.498" />
</android.support.constraint.ConstraintLayout>