[AndroidTips]怎么启动Voice Input或者Output引擎的设置界面

对于启动Voice Output的设置界面，参考下面的链接：

http://stackoverflow.com/questions/5702790/how-show-voice-input-and-output-settings-page-from-application

http://stackoverflow.com/questions/3160447/how-to-show-up-the-settings-for-text-to-speech-in-my-app

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对于启动Voice Input的设置界面，我参考VoiceInputOutputSettings.java写了下面的代码：

    public void startSettings() {        List<ResolveInfo> availableRecognitionServices = mContext.getPackageManager().queryIntentServices(                new Intent(RecognitionService.SERVICE_INTERFACE),                PackageManager.GET_META_DATA);        int numAvailable = availableRecognitionServices.size();        if (numAvailable < 1) {            return;        }        String currentSetting = Settings.Secure.getString(mContext.getContentResolver(),                "voice_recognition_service");        ResolveInfo currentRecognizer = null;        for (ResolveInfo resolveInfo : availableRecognitionServices) {            String recognizerComponent = new ComponentName(resolveInfo.serviceInfo.packageName,                    resolveInfo.serviceInfo.name).flattenToShortString();            if (recognizerComponent.equals(currentSetting)) {                currentRecognizer = resolveInfo;                break;            }        }        if (currentRecognizer == null) {            return;        }        XmlResourceParser parser = null;        String settingsActivity = null;        ServiceInfo si = currentRecognizer.serviceInfo;        try {            parser = si.loadXmlMetaData(mContext.getPackageManager(),                    RecognitionService.SERVICE_META_DATA);            if (parser == null) {                throw new XmlPullParserException("No " + RecognitionService.SERVICE_META_DATA +                        " meta-data for " + si.packageName);            }            int type;            while ((type = parser.next()) != XmlPullParser.END_DOCUMENT                    && type != XmlPullParser.START_TAG) {            }            String nodeName = parser.getName();            if (!"recognition-service".equals(nodeName)) {                throw new XmlPullParserException(                        "Meta-data does not start with recognition-service tag");            }            int count = parser.getAttributeCount();            for (int i = 0; i < count; i++) {                String attrName = parser.getAttributeName(i);                String attrValue = parser.getAttributeValue(i);                if (attrName.equals("settingsActivity")) {                    settingsActivity = attrValue;                    break;                }            }        } catch (XmlPullParserException e) {            Log.e(TAG, "error parsing recognition service meta-data", e);        } catch (IOException e) {            Log.e(TAG, "error parsing recognition service meta-data", e);        } finally {            if (parser != null) {                parser.close();            }        }        if (settingsActivity != null) {            try {                Intent i = new Intent(Intent.ACTION_MAIN);                i.setComponent(new ComponentName(si.packageName, settingsActivity));                i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);                mContext.startActivity(i);            } catch (ActivityNotFoundException e) {                Log.e(TAG, "Error startActivity", e);            }        }    }