android - 如何获取设备的默认 SpeechService 提供程序 - Android API 13

Question

根据 this page，Android 13 删除了包括 RecognitionService 在内的 SpeechService 实现.它还提到:

“应用程序应使用设备的默认语音服务提供程序，而不是对特定应用程序进行硬编码。”

这是我在小于 13 的 API 上使用的代码:

String GOOGLE_RECOGNITION_SERVICE_NAME =
        "com.google.android.googlequicksearchbox/com.google.android.voicesearch.serviceapi.GoogleRecognitionService";

SpeechRecognizer speechRecognizer = SpeechRecognizer.createSpeechRecognizer(context,
            ComponentName.unflattenFromString(GOOGLE_RECOGNITION_SERVICE_NAME));

关于如何获取设备默认的 SpeechService 提供商有什么想法吗？

Answer 1

我通过实现这段代码解决了这个问题:

public static String getAvailableVoiceRecognitionService(Activity activity)
{
    final List<ResolveInfo> services = activity.getPackageManager().queryIntentServices(
            new Intent(RecognitionService.SERVICE_INTERFACE), 0);

    String recognitionServiceName = null;

    for (final ResolveInfo info : services)
    {
        String packageName = info.serviceInfo.packageName;
        String serviceName = info.serviceInfo.name;

        String testRecognitionServiceName = packageName + "/" + serviceName;

        ServiceConnection connection = new ServiceConnection() {
            @Override
            public void onServiceConnected(ComponentName name, IBinder service) {

            }

            @Override
            public void onServiceDisconnected(ComponentName name) {

            }
        };

        Intent serviceIntent = new Intent(RecognitionService.SERVICE_INTERFACE);

        ComponentName recognizerServiceComponent =
                ComponentName.unflattenFromString(testRecognitionServiceName);

        if (recognizerServiceComponent != null)
        {
            serviceIntent.setComponent(recognizerServiceComponent);
            try
            {
                boolean isServiceAvailableToBind = activity.bindService(serviceIntent, connection, Context.BIND_AUTO_CREATE);
                if (isServiceAvailableToBind) {
                    activity.unbindService(connection);
                    recognitionServiceName=testRecognitionServiceName;
                    break;
                }
            }
            catch (SecurityException e)
            {
                e.printStackTrace();
            }
        }
    }

    return recognitionServiceName;
}

然后要启动 SpeechRecognizer，您需要执行以下操作:

public void initSpeechRecognition(Activity activity)
{
   String recognitionServiceName = getAvailableVoiceRecognitionService(activity);
    if (recognitionServiceName==null)
        return;

    speechRecognizer = SpeechRecognizer.createSpeechRecognizer(activity,
            ComponentName.unflattenFromString(recognitionServiceName));
 }