我已经制作了一个小测试程序，可以为您回答这个问题。
它会显示出Google语音引擎中的所有语音列表，您可以点击它们并听到它们！太好了！
它实际上做了什么：
- 使用Google文本转语音引擎（如果存在于设备上）初始化TextToSpeech对象。
- 让您从包含与代码中指定的Locale（在本例中为英语）和安装的Google文本转语音引擎版本相对应的所有潜在可用的Voice的ListView中选择特定的Voice。
这样，您就可以测试所有的语音，看看您所寻找的“Google Assistant”语音是否在其中，如果不可用，您可以随着发布新版本的Google文本转语音引擎而继续检查。在此测试中，似乎最高质量的语音都是quality:400，并且需要网络连接。
注：
即使一个语音（尤其是英语）未被“安装”，它很可能仍然会“播放”。这是因为当使用setVoice（Voice v）时，（Google）引擎将返回一个“success”int，即使所请求的语音不可用！只要它有同一语言的其他“后备”语音。不幸的是，它在后台执行所有这些操作，即使您使用getVoice（）比较对象，仍然偷偷地报告使用您所请求的完全相同的语音。:(。
通常，如果一个语音说它已经被安装，那么您听到的语音就是您请求的语音。
出于这些原因，您将希望在测试这些语音时确保您处于互联网上（以便在请求不可用的语音时自动安装它们）......并且还要确保需要网络连接的Voices不会“自动降级”。
您可以滑动/刷新语音列表以检查是否已安装语音，或使用系统的下拉菜单观察下载情况......或进入设备系统设置中的Google文本转语音设置。
在列表视图中，“网络需求”和“已安装”等语音特征只是Google引擎报告的回显，可能不准确。:(
在Voice类文档中指定的最大可能语音质量为500。在我的测试中，我只能找到高达400的语音。这可能是因为我在我的测试设备上没有安装最新版本的Google文本转语音引擎（我没有Play Store访问权限来更新它）。如果您在使用真实设备，请使用Google Play商店安装最新版本的Google TTS。您可以在日志中验证引擎版本。根据维基百科，截至本文撰写时，最新版本是3.15.18.200023596。我测试设备上的版本是3.13.1。
要重新创建此测试应用程序，请使用Android Studio中的空Java项目，并将最小API设置为21。（getVoices（）在21之前不起作用）。
清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package=" [ your.package.name ] "
android:windowSoftInputMode="stateHidden">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
主活动:
package [ your package name ];
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.Color;
import android.speech.tts.TextToSpeech;
import android.speech.tts.UtteranceProgressListener;
import android.speech.tts.Voice;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
EditText textToSpeak;
TextView progressView;
TextToSpeech googleTTS;
ListView voiceListView;
SwipeRefreshLayout swipeRefreshLayout;
Long timeOfSpeakRequest;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textToSpeak = findViewById(R.id.textToSpeak);
textToSpeak.setText("Do I sound robotic to you? 1,2,3,4... yabadabadoo. "
+ "ooo! ahh! la-la-la-la-la! num-num-dibby-dibby-num-tick-tock... "
+ "Can I pronounce the word, Antidisestablishmentarianism? "
+ "Gerp! My pants are too tight! "
+ "CODE RED! CODE RED! Initiate disassemble! Ice Cream is cold "
+ "...in my pants. Exterminate! exterminate! Directive 4 is "
+ "classified."
);
progressView = findViewById(R.id.progressView);
voiceListView = findViewById(R.id.voiceListView);
swipeRefreshLayout = findViewById(R.id.swipeRefresh);
if (isGoogleEngineInstalled()) {
createGoogleTTS();
} else {
Log.i("XXX", "onCreate(): Google not installed -- nothing done.");
}
}
@Override
protected void onStart() {
super.onStart();
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
assignFullSetOfVoicesToVoiceListView();
}
});
}
private void onTTSInitialized() {
setUpWhatHappensWhenAVoiceItemIsClicked();
setUtteranceProgressListenerOnTheTTS();
assignFullSetOfVoicesToVoiceListView();
}
private void createGoogleTTS() {
googleTTS = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if (status != TextToSpeech.ERROR) {
Log.i("XXX", "Google tts initialized");
onTTSInitialized();
} else {
Log.i("XXX", "Internal Google engine init error.");
}
}
}, "com.google.android.tts");
}
private void setUpWhatHappensWhenAVoiceItemIsClicked() {
voiceListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Voice desiredVoice = (Voice) parent.getAdapter().getItem(position);
if (googleTTS.setVoice(desiredVoice) == 0) {
Log.i("XXX", "Speech voice set to: " + desiredVoice.toString());
speak();
}
}
});
}
private void setUtteranceProgressListenerOnTheTTS() {
UtteranceProgressListener blurp = new UtteranceProgressListener() {
@Override
public void onStart(String s) {
long timeSinceSpeakCall = System.currentTimeMillis() - timeOfSpeakRequest;
Log.i("XXX", "progress.onStart() callback. "
+ timeSinceSpeakCall + " millis since speak() was called.");
runOnUiThread(new Runnable() {
@Override
public void run() {
progressView.setTextColor(Color.GREEN);
progressView.setText("PROGRESS: STARTED");
}
});
}
@Override
public void onDone(String s) {
long timeSinceSpeakCall = System.currentTimeMillis() - timeOfSpeakRequest;
Log.i("XXX", "progress.onDone() callback. "
+ timeSinceSpeakCall + " millis since speak() was called.");
runOnUiThread(new Runnable() {
@Override
public void run() {
progressView.setTextColor(Color.GREEN);
progressView.setText("PROGRESS: DONE");
}
});
}
@Override
public void onError(String s) {
long timeSinceSpeakCall = System.currentTimeMillis() - timeOfSpeakRequest;
Log.i("XXX", "progress.onERROR() callback. "
+ timeSinceSpeakCall + " millis since speak() was called.");
runOnUiThread(new Runnable() {
@Override
public void run() {
progressView.setTextColor(Color.RED);
progressView.setText("PROGRESS: ERROR");
}
});
}
};
googleTTS.setOnUtteranceProgressListener(blurp);
}
private void assignFullSetOfVoicesToVoiceListView() {
googleTTS.stop();
List<Voice> tempVoiceList = new ArrayList<>();
for (Voice v : googleTTS.getVoices()) {
if (v.getLocale().getLanguage().contains("en")) {
tempVoiceList.add(v);
}
}
Collections.sort(tempVoiceList, new Comparator<Voice>() {
@Override
public int compare(Voice v1, Voice v2) {
Log.i("XXX", "comparing item");
return (v2.getName().compareToIgnoreCase(v1.getName()));
}
});
VoiceAdapter tempAdapter = new VoiceAdapter(this, tempVoiceList);
voiceListView.setAdapter(tempAdapter);
swipeRefreshLayout.setRefreshing(false);
progressView.setTextColor(Color.BLACK);
progressView.setText("PROGRESS: ...");
}
private void speak() {
HashMap<String, String> map = new HashMap<>();
map.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, "merp");
timeOfSpeakRequest = System.currentTimeMillis();
googleTTS.speak(textToSpeak.getText().toString(), TextToSpeech.QUEUE_FLUSH, map);
}
private boolean isGoogleEngineInstalled() {
final Intent ttsIntent = new Intent();
ttsIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
final PackageManager pm = getPackageManager();
final List<ResolveInfo> list = pm.queryIntentActivities(ttsIntent, PackageManager.GET_META_DATA);
boolean googleIsInstalled = false;
for (int i = 0; i < list.size(); i++) {
ResolveInfo resolveInfoUnderScrutiny = list.get(i);
String engineName = resolveInfoUnderScrutiny.activityInfo.applicationInfo.packageName;
if (engineName.equals("com.google.android.tts")) {
String version = "null";
try {
version = pm.getPackageInfo(engineName,
PackageManager.GET_META_DATA).versionName;
} catch (Exception e) {
Log.i("XXX", "Error getting google engine verion: " + e.toString());
}
Log.i("XXX", "Google engine version " + version + " is installed!");
googleIsInstalled = true;
} else {
Log.i("XXX", "Google Engine is not installed!");
}
}
return googleIsInstalled;
}
}
VoiceAdapter.java：
package [ your package name ];
import android.content.Context;
import android.graphics.Color;
import android.speech.tts.Voice;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.List;
public class VoiceAdapter extends BaseAdapter {
private Context mContext;
private LayoutInflater mInflater;
private List<Voice> mDataSource;
public VoiceAdapter(Context context, List<Voice> voicesToDisplay) {
mContext = context;
mDataSource = voicesToDisplay;
mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return mDataSource.size();
}
@Override
public Object getItem(int position) {
return mDataSource.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView = mInflater.inflate(R.layout.list_item_voice, parent, false);
if (position%2 == 0) {
rowView.setBackgroundColor(Color.rgb(245,245,245));
}
Voice voiceUnderScrutiny = mDataSource.get(position);
TextView voiceTitleTextView =
(TextView) rowView.findViewById(R.id.voice_title);
TextView qualityTextView =
(TextView) rowView.findViewById(R.id.voice_quality);
TextView networkRequiredTextView =
(TextView) rowView.findViewById(R.id.voice_network);
TextView isInstalledTextView =
(TextView) rowView.findViewById(R.id.voice_installed);
TextView featuresTextView =
(TextView) rowView.findViewById(R.id.voice_features);
voiceTitleTextView.setText("VOICE NAME: " + voiceUnderScrutiny.getName());
qualityTextView.setText( "QLTY: " + ((Integer) voiceUnderScrutiny.getQuality()).toString() );
if (voiceUnderScrutiny.getQuality() == 500) {
qualityTextView.setTextColor(Color.GREEN);
}
if (!voiceUnderScrutiny.isNetworkConnectionRequired()) {
networkRequiredTextView.setText("NET_REQ?: NO");
} else {
networkRequiredTextView.setText("NET_REQ?: YES");
}
if (!voiceUnderScrutiny.getFeatures().contains("notInstalled")) {
isInstalledTextView.setTextColor(Color.GREEN);
isInstalledTextView.setText("INSTLLD?: YES");
} else {
isInstalledTextView.setTextColor(Color.RED);
isInstalledTextView.setText("INSTLLD?: NO");
}
featuresTextView.setText("FEATURES: " + voiceUnderScrutiny.getFeatures().toString());
return rowView;
}
}
activity_main.xml：
<?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"
android:focusable="true"
android:focusableInTouchMode="true"
tools:context=".MainActivity">
<EditText
android:id="@+id/textToSpeak"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:ems="10"
android:inputType="textPersonName"
android:text="textToSpeak..."
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipeRefresh"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/progressView">
<ListView
android:id="@+id/voiceListView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp">
</ListView>
</android.support.v4.widget.SwipeRefreshLayout>
<TextView
android:id="@+id/progressView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="UTTERANCE_PROGRESS:"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textToSpeak" />
</android.support.constraint.ConstraintLayout>
list_item_voice.xml：
<?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="wrap_content"
android:layout_centerInParent="true"
android:paddingBottom="8dp"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:paddingTop="8dp"
>
<TextView
android:id="@+id/voice_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="NAME:"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/voice_installed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:fontFamily="monospace"
android:text="INSTALLED? "
android:textAlignment="textStart"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/voice_network"
app:layout_constraintTop_toBottomOf="@+id/voice_title" />
<TextView
android:id="@+id/voice_quality"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="QUALITY:"
app:layout_constraintEnd_toStartOf="@+id/voice_network"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/voice_title" />
<TextView
android:id="@+id/voice_features"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="FEATURES:"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/voice_quality" />
<TextView
android:id="@+id/voice_network"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="NET_REQUIRED?"
app:layout_constraintEnd_toStartOf="@+id/voice_installed"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/voice_quality"
app:layout_constraintTop_toBottomOf="@+id/voice_title" />
</android.support.constraint.ConstraintLayout>
