Android 文字转语音 API 听起来像机器人
Android Text-To-Speech API Sounds Robotic
我是第一次学习 android 开发，我的目标是创建一个简单的 Hello World 应用程序，它接收一些文本并大声朗读。
我的代码基于我发现的一个示例，这是我的代码：
class MainFeeds : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main_feeds)
card.setOnClickListener{
Toast.makeText(this, "Hello", Toast.LENGTH_LONG).show()
TTS(this, "Hello this is leo")
}
}
}
class TTS(private val activity: Activity,
private val message: String) : TextToSpeech.OnInitListener {
private val tts: TextToSpeech = TextToSpeech(activity, this, "com.google.android.tts")
override fun onInit(i: Int) {
if (i == TextToSpeech.SUCCESS) {
val localeUS = Locale.US
val result: Int
result = tts.setLanguage(localeUS)
if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
Toast.makeText(activity, "This Language is not supported", Toast.LENGTH_SHORT).show()
} else {
speakOut(message)
}
} else {
Toast.makeText(activity, "Initilization Failed!", Toast.LENGTH_SHORT).show()
}
}
private fun speakOut(message: String) {
tts.speak(message, TextToSpeech.QUEUE_FLUSH, null, null)
}
}
它工作得很好，我 运行 遇到的问题是合成器发出的音频听起来非常机械化，几乎就像我在使用 Google 地图时一样我与互联网断开连接。使用语音 Google 助手是否利用了我必须启用的其他一些 API？
编辑：我已经在我的 Pixel 2xl 上试过 运行 该应用程序，它听起来仍然很机械，因为它没有使用 Google 助理语音。
语音质量首先取决于您创建的 TextToSpeech 对象 "speech engine" 使用的内容：
private val tts: TextToSpeech = TextToSpeech(activity, this)
如果您输入的是：
private val tts: TextToSpeech = TextToSpeech(activity, this, "com.google.android.tts")
...那么您 运行 使用该代码的任何设备都会 尝试 使用 google 语音引擎... 但实际上它只会如果设备上存在，则使用它。
同样，使用 "com.samsung.SMT" 会尝试使用三星语音引擎（这也是高质量的，但通常只安装在三星 [真实] 设备上）。
Google 语音引擎是否可用与设备的 Android API 级别无关（只要它足够新 运行 Google 引擎），但设备上是否安装了实际的 Google 文本转语音引擎。
确保安装了 Google 引擎：
在 Android Studio 模拟器上：
创建一个新的模拟器和 select 一个在 "target" 列中具有 "Google APIs" 或 "Google Play" 的系统映像。
在真实设备上：
前往 Play 商店并安装 Google speech engine。
Android 上的 TTS（或至少试图预测其行为）可能是真正的野兽。
我做了一个小测试程序，应该可以为您解答这个问题。
它会向您显示 Google 引擎中包含的所有声音的列表，您可以单击它们并收听它们！耶！
它实际做了什么：
- 使用 Google 文本转语音引擎初始化 TextToSpeech 对象（如果设备上存在）。
- 让您从 ListView 中选择一个特定的声音，其中包含与代码中指定的区域设置（在本例中为英语）相对应的所有可能可用的声音...并且与 Google 文本的版本相对应-您已安装的语音转换引擎。
这样，你就可以测试所有的声音，看看你要找的"Google Assistant"声音是否在某处，如果没有，你可以继续检查[=86=的新版本] 文本转语音引擎发布。在我看来，本次测试的最高质量语音都是quality:400，并且指定需要网络连接
备注：
即使是 "not installed." 语音（尤其是英语）很可能仍然 "play" 这是因为在使用 setVoice(Voice v) 时，(Google) 引擎将 return 一个 "success" int 即使请求的语音不可用（！），只要它手头上有其他 "back-up" 相同语言的语音。不幸的是，它在后台执行所有这些操作，并且仍然偷偷报告它使用的是与您请求的完全相同的语音，即使您使用 getVoice() 并比较对象也是如此。 :(.
一般来说，如果语音提示已安装，那么您听到的就是您请求的语音。
出于这些原因，您需要确保在测试这些语音时处于互联网上（以便在您请求不可用的语音时自动安装）...以及这样需要网络连接的声音就不会 "auto-downgrade."
您可以swipe/refresh语音列表查看语音是否已经安装，或者使用系统下拉菜单查看下载...或者进入Google设备系统设置中的文字转语音设置。
在列表视图中，"network required," 和 "installed," 等语音功能只是 Google 引擎报告内容的回声，可能并不准确。 :(
Voice class documentation中指定的最大可能语音质量是500。在我的测试中，我只能找到质量最高为400的语音。这可能是因为我没有最新版本我的测试设备上安装了 Google 个文本转语音（我没有 Play Store 访问权限来更新它）。如果您使用的是真实设备，我建议您使用 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，撰写本文时的最新版本是 3.15.18.200023596。我的测试设备上的版本是 3.13.1.
要重新创建此测试应用程序，请在 Android Studio 中创建一个空白 Java 项目，其最小 API 为 21。（getVoices() 在 21 岁之前不起作用).
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>
主要活动：
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);
// Create the TTS and wait until it's initialized to do anything else
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();
}
});
}
// this is where the program really begins (when the TTS is initialized)
private void onTTSInitialized() {
setUpWhatHappensWhenAVoiceItemIsClicked();
setUtteranceProgressListenerOnTheTTS();
assignFullSetOfVoicesToVoiceListView();
}
// FACTORED/EXTRACTED METHODS ----------------------------------------------------------------
// These are just pulled out to make onCreate() easier to read and the basic sequence
// of events more obvious.
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 (setting the desired voice is "successful")...
// in the case of google engine, this does not necessarily mean the voice you
// want will actually be used. :(
if (googleTTS.setVoice(desiredVoice) == 0) {
Log.i("XXX", "Speech voice set to: " + desiredVoice.toString());
// TTS did may "auto-downgrade" voice selection
// due to internal reason such as no data
// Unfortunately it will not tell you, and there seems to be no
// way of checking whether the presently selected voice (getVoice()) "equals"
// the desired voice.
speak();
}
}
});
}
private void setUtteranceProgressListenerOnTheTTS() {
UtteranceProgressListener blurp = new UtteranceProgressListener() {
@Override // MIN API 15
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 // MIN API 15
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");
}
});
}
// Getting an error can simply mean that the particular voice is not available
// to the device yet... and still needs to be downloaded / is still downloading
@Override // MIN API 15 (depracated at API 21)
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);
}
// must happens AFTER tts is initialized
private void assignFullSetOfVoicesToVoiceListView() {
googleTTS.stop();
List<Voice> tempVoiceList = new ArrayList<>();
for (Voice v : googleTTS.getVoices()) {
if (v.getLocale().getLanguage().contains("en")) { // only English voices
tempVoiceList.add(v);
}
}
// Sort the list alphabetically by name
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);
}
// Checks if Google Engine is installed
// ... (and gives more info in Logs).
// The version number is going to dictate the quality of voices available
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) {
// In a real app this method is not efficient,
// and "View Holder Pattern" shoudl be used instead.
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);
// example output of Voice.toString() :
// "Voice[Name: pt-br-x-afs#male_2-local, locale: pt_BR, quality: 400, latency: 200,
// requiresNetwork: false, features: [networkTimeoutMs, notInstalled, networkRetriesCount]]"
// Get title element
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());
// Voice Quality...
// ( https://developer.android.com/reference/android/speech/tts/Voice.html )
// 100 = Very Low, 200 = Low, 300 = Normal, 400 = High, 500 = Very High
qualityTextView.setText( "QLTY: " + ((Integer) voiceUnderScrutiny.getQuality()).toString() );
if (voiceUnderScrutiny.getQuality() == 500) {
qualityTextView.setTextColor(Color.GREEN); // set v. high quality to 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>
我是第一次学习 android 开发，我的目标是创建一个简单的 Hello World 应用程序，它接收一些文本并大声朗读。
我的代码基于我发现的一个示例，这是我的代码：
class MainFeeds : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main_feeds)
card.setOnClickListener{
Toast.makeText(this, "Hello", Toast.LENGTH_LONG).show()
TTS(this, "Hello this is leo")
}
}
}
class TTS(private val activity: Activity,
private val message: String) : TextToSpeech.OnInitListener {
private val tts: TextToSpeech = TextToSpeech(activity, this, "com.google.android.tts")
override fun onInit(i: Int) {
if (i == TextToSpeech.SUCCESS) {
val localeUS = Locale.US
val result: Int
result = tts.setLanguage(localeUS)
if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
Toast.makeText(activity, "This Language is not supported", Toast.LENGTH_SHORT).show()
} else {
speakOut(message)
}
} else {
Toast.makeText(activity, "Initilization Failed!", Toast.LENGTH_SHORT).show()
}
}
private fun speakOut(message: String) {
tts.speak(message, TextToSpeech.QUEUE_FLUSH, null, null)
}
}
它工作得很好，我 运行 遇到的问题是合成器发出的音频听起来非常机械化，几乎就像我在使用 Google 地图时一样我与互联网断开连接。使用语音 Google 助手是否利用了我必须启用的其他一些 API？
编辑：我已经在我的 Pixel 2xl 上试过 运行 该应用程序，它听起来仍然很机械，因为它没有使用 Google 助理语音。
语音质量首先取决于您创建的 TextToSpeech 对象 "speech engine" 使用的内容：
private val tts: TextToSpeech = TextToSpeech(activity, this)
如果您输入的是：
private val tts: TextToSpeech = TextToSpeech(activity, this, "com.google.android.tts")
...那么您 运行 使用该代码的任何设备都会 尝试 使用 google 语音引擎... 但实际上它只会如果设备上存在，则使用它。
同样，使用 "com.samsung.SMT" 会尝试使用三星语音引擎（这也是高质量的，但通常只安装在三星 [真实] 设备上）。
Google 语音引擎是否可用与设备的 Android API 级别无关（只要它足够新 运行 Google 引擎），但设备上是否安装了实际的 Google 文本转语音引擎。
确保安装了 Google 引擎：
在 Android Studio 模拟器上：
创建一个新的模拟器和 select 一个在 "target" 列中具有 "Google APIs" 或 "Google Play" 的系统映像。
在真实设备上：
前往 Play 商店并安装 Google speech engine。
Android 上的 TTS（或至少试图预测其行为）可能是真正的野兽。
我做了一个小测试程序，应该可以为您解答这个问题。
它会向您显示 Google 引擎中包含的所有声音的列表，您可以单击它们并收听它们！耶！
它实际做了什么：
- 使用 Google 文本转语音引擎初始化 TextToSpeech 对象（如果设备上存在）。
- 让您从 ListView 中选择一个特定的声音，其中包含与代码中指定的区域设置（在本例中为英语）相对应的所有可能可用的声音...并且与 Google 文本的版本相对应-您已安装的语音转换引擎。
这样，你就可以测试所有的声音，看看你要找的"Google Assistant"声音是否在某处，如果没有，你可以继续检查[=86=的新版本] 文本转语音引擎发布。在我看来，本次测试的最高质量语音都是quality:400，并且指定需要网络连接
备注：
即使是 "not installed." 语音（尤其是英语）很可能仍然 "play" 这是因为在使用 setVoice(Voice v) 时，(Google) 引擎将 return 一个 "success" int 即使请求的语音不可用（！），只要它手头上有其他 "back-up" 相同语言的语音。不幸的是，它在后台执行所有这些操作，并且仍然偷偷报告它使用的是与您请求的完全相同的语音，即使您使用 getVoice() 并比较对象也是如此。 :(.
一般来说，如果语音提示已安装，那么您听到的就是您请求的语音。
出于这些原因，您需要确保在测试这些语音时处于互联网上（以便在您请求不可用的语音时自动安装）...以及这样需要网络连接的声音就不会 "auto-downgrade."
您可以swipe/refresh语音列表查看语音是否已经安装，或者使用系统下拉菜单查看下载...或者进入Google设备系统设置中的文字转语音设置。
在列表视图中，"network required," 和 "installed," 等语音功能只是 Google 引擎报告内容的回声，可能并不准确。 :(
Voice class documentation中指定的最大可能语音质量是500。在我的测试中，我只能找到质量最高为400的语音。这可能是因为我没有最新版本我的测试设备上安装了 Google 个文本转语音（我没有 Play Store 访问权限来更新它）。如果您使用的是真实设备，我建议您使用 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，撰写本文时的最新版本是 3.15.18.200023596。我的测试设备上的版本是 3.13.1.
要重新创建此测试应用程序，请在 Android Studio 中创建一个空白 Java 项目，其最小 API 为 21。（getVoices() 在 21 岁之前不起作用).
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>
主要活动：
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);
// Create the TTS and wait until it's initialized to do anything else
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();
}
});
}
// this is where the program really begins (when the TTS is initialized)
private void onTTSInitialized() {
setUpWhatHappensWhenAVoiceItemIsClicked();
setUtteranceProgressListenerOnTheTTS();
assignFullSetOfVoicesToVoiceListView();
}
// FACTORED/EXTRACTED METHODS ----------------------------------------------------------------
// These are just pulled out to make onCreate() easier to read and the basic sequence
// of events more obvious.
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 (setting the desired voice is "successful")...
// in the case of google engine, this does not necessarily mean the voice you
// want will actually be used. :(
if (googleTTS.setVoice(desiredVoice) == 0) {
Log.i("XXX", "Speech voice set to: " + desiredVoice.toString());
// TTS did may "auto-downgrade" voice selection
// due to internal reason such as no data
// Unfortunately it will not tell you, and there seems to be no
// way of checking whether the presently selected voice (getVoice()) "equals"
// the desired voice.
speak();
}
}
});
}
private void setUtteranceProgressListenerOnTheTTS() {
UtteranceProgressListener blurp = new UtteranceProgressListener() {
@Override // MIN API 15
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 // MIN API 15
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");
}
});
}
// Getting an error can simply mean that the particular voice is not available
// to the device yet... and still needs to be downloaded / is still downloading
@Override // MIN API 15 (depracated at API 21)
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);
}
// must happens AFTER tts is initialized
private void assignFullSetOfVoicesToVoiceListView() {
googleTTS.stop();
List<Voice> tempVoiceList = new ArrayList<>();
for (Voice v : googleTTS.getVoices()) {
if (v.getLocale().getLanguage().contains("en")) { // only English voices
tempVoiceList.add(v);
}
}
// Sort the list alphabetically by name
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);
}
// Checks if Google Engine is installed
// ... (and gives more info in Logs).
// The version number is going to dictate the quality of voices available
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) {
// In a real app this method is not efficient,
// and "View Holder Pattern" shoudl be used instead.
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);
// example output of Voice.toString() :
// "Voice[Name: pt-br-x-afs#male_2-local, locale: pt_BR, quality: 400, latency: 200,
// requiresNetwork: false, features: [networkTimeoutMs, notInstalled, networkRetriesCount]]"
// Get title element
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());
// Voice Quality...
// ( https://developer.android.com/reference/android/speech/tts/Voice.html )
// 100 = Very Low, 200 = Low, 300 = Normal, 400 = High, 500 = Very High
qualityTextView.setText( "QLTY: " + ((Integer) voiceUnderScrutiny.getQuality()).toString() );
if (voiceUnderScrutiny.getQuality() == 500) {
qualityTextView.setTextColor(Color.GREEN); // set v. high quality to 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>