如何在不更改任何设备设置的情况下在android应用程序中使用日语google tts引擎

Question

我正在开发一个日语学习应用程序。我想在我的应用中听到日语发音。

我像这样初始化tts

private TextToSpeech tts;

private void initTTS()
{
    tts = new TextToSpeech(this, new TextToSpeech.OnInitListener()
    {
        @Override
        public void onInit(int status)
        {
            if(status == TextToSpeech.SUCCESS)
            {
                Locale loc = new Locale("ja_JP");
                int result = tts.setLanguage(loc);
                if(result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED)
                {
                    Intent installIntent = new Intent();
                    installIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
                    installIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    //installIntent.setPackage("com.google.android.tts");
                    startActivityForResult(installIntent,MY_DATA_CHECK_CODE);
                }
                else
                {
                    Log.e(TAG,"initilization success");
                }
            }
            else
            {
                Log.e(TAG,"initilization failed");
            }
        }
    });
}

我手机的默认语言设置不是日语。我的应用程序用户也是如此。

如果默认语言设置不是日语，则tts.setLanguage返回TextToSpeech.LANG_MISSING_DATA。所以我安装了带有新活动的tts数据。但是google tts引擎日语版已经安装好了。如何在不更改客户电话语言的情况下为客户提供日语tts服务？

Answer 1

要初始化专门使用google引擎的TTS对象，而不考虑用户的首选引擎设置：

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");

    }

当然，这只有在安装了google引擎的情况下才有效，因此您还可以使用以下方法：

private boolean isGoogleTTSInstalled() {

        Intent ttsIntent = new Intent();
        ttsIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
        PackageManager pm = this.getPackageManager();
        List<ResolveInfo> listOfInstalledTTSInfo = pm.queryIntentActivities(ttsIntent, PackageManager.GET_META_DATA);
        for (ResolveInfo r : listOfInstalledTTSInfo) {
            String engineName = r.activityInfo.applicationInfo.packageName;
            if (engineName.equals("com.google.android.tts")) {
                return true;
            }
        }
        return false;

    }

private void installGoogleTTS() {

        Intent goToMarket = new Intent(Intent.ACTION_VIEW)
                .setData(Uri.parse("market://details?id=com.google.android.tts"));
        startActivity(goToMarket);

    }


// use this if attempting to speak in Japanese locale results in onError() being called by your UtteranceProgressListener.
private void openTTSSettingsToInstallUnsupportedLanguage() {

        Intent intent = new Intent();
        intent.setAction("com.android.settings.TTS_SETTINGS");
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intent);

    }